Initial commit

.ci/pylintrc

@@ -0,0 +1,407 @@
+[MASTER]
+
+# Specify a configuration file.
+#rcfile=
+
+# Python code to execute, usually for sys.path manipulation such as
+# pygtk.require().
+#init-hook=
+
+# Add files or directories to the blacklist. They should be base names, not
+# paths.
+ignore=CVS
+
+# Add files or directories matching the regex patterns to the blacklist. The
+# regex matches against base names, not paths.
+ignore-patterns=
+
+# Pickle collected data for later comparisons.
+persistent=yes
+
+# List of plugins (as comma separated values of python modules names) to load,
+# usually to register additional checkers.
+load-plugins=
+
+# Use multiple processes to speed up Pylint.
+jobs=1
+
+# Allow loading of arbitrary C extensions. Extensions are imported into the
+# active Python interpreter and may run arbitrary code.
+unsafe-load-any-extension=no
+
+# A comma-separated list of package or module names from where C extensions may
+# be loaded. Extensions are loading into the active Python interpreter and may
+# run arbitrary code
+extension-pkg-whitelist=
+
+# Allow optimization of some AST trees. This will activate a peephole AST
+# optimizer, which will apply various small optimizations. For instance, it can
+# be used to obtain the result of joining multiple strings with the addition
+# operator. Joining a lot of strings can lead to a maximum recursion error in
+# Pylint and this flag can prevent that. It has one side effect, the resulting
+# AST will be different than the one from reality. This option is deprecated
+# and it will be removed in Pylint 2.0.
+optimize-ast=no
+
+
+[MESSAGES CONTROL]
+
+# Only show warnings with the listed confidence levels. Leave empty to show
+# all. Valid levels: HIGH, INFERENCE, INFERENCE_FAILURE, UNDEFINED
+confidence=
+
+# Enable the message, report, category or checker with the given id(s). You can
+# either give multiple identifier separated by comma (,) or put this option
+# multiple time (only on the command line, not in the configuration file where
+# it should appear only once). See also the "--disable" option for examples.
+#enable=
+
+# Disable the message, report, category or checker with the given id(s). You
+# can either give multiple identifiers separated by comma (,) or put this
+# option multiple times (only on the command line, not in the configuration
+# file where it should appear only once).You can also use "--disable=all" to
+# disable everything first and then reenable specific checks. For example, if
+# you want to run only the similarities checker, you can use "--disable=all
+# --enable=similarities". If you want to run only the classes checker, but have
+# no Warning level messages displayed, use"--disable=all --enable=classes
+# --disable=W"
+disable=import-star-module-level,old-octal-literal,oct-method,print-statement,unpacking-in-except,parameter-unpacking,backtick,old-raise-syntax,old-ne-operator,long-suffix,dict-view-method,dict-iter-method,metaclass-assignment,next-method-called,raising-string,indexing-exception,raw_input-builtin,long-builtin,file-builtin,execfile-builtin,coerce-builtin,cmp-builtin,buffer-builtin,basestring-builtin,apply-builtin,filter-builtin-not-iterating,using-cmp-argument,useless-suppression,range-builtin-not-iterating,suppressed-message,no-absolute-import,old-division,cmp-method,reload-builtin,zip-builtin-not-iterating,intern-builtin,unichr-builtin,reduce-builtin,standarderror-builtin,unicode-builtin,xrange-builtin,coerce-method,delslice-method,getslice-method,setslice-method,input-builtin,round-builtin,hex-method,nonzero-method,map-builtin-not-iterating
+
+
+[REPORTS]
+
+# Set the output format. Available formats are text, parseable, colorized, msvs
+# (visual studio) and html. You can also give a reporter class, eg
+# mypackage.mymodule.MyReporterClass.
+output-format=text
+
+# Put messages in a separate file for each module / package specified on the
+# command line instead of printing them on stdout. Reports (if any) will be
+# written in a file name "pylint_global.[txt|html]". This option is deprecated
+# and it will be removed in Pylint 2.0.
+files-output=no
+
+# Tells whether to display a full report or only the messages
+reports=yes
+
+# Python expression which should return a note less than 10 (10 is the highest
+# note). You have access to the variables errors warning, statement which
+# respectively contain the number of errors / warnings messages and the total
+# number of statements analyzed. This is used by the global evaluation report
+# (RP0004).
+evaluation=10.0 - ((float(5 * error + warning + refactor + convention) / statement) * 10)
+
+# Template used to display messages. This is a python new-style format string
+# used to format the message information. See doc for all details
+#msg-template=
+
+
+[BASIC]
+
+# Good variable names which should always be accepted, separated by a comma
+good-names=i,j,k,ex,Run,_,fh
+
+# Bad variable names which should always be refused, separated by a comma
+bad-names=foo,bar,baz,toto,tutu,tata
+
+# Colon-delimited sets of names that determine each other's naming style when
+# the name regexes allow several styles.
+name-group=
+
+# Include a hint for the correct naming format with invalid-name
+include-naming-hint=no
+
+# List of decorators that produce properties, such as abc.abstractproperty. Add
+# to this list to register other decorators that produce valid properties.
+property-classes=abc.abstractproperty
+
+# Regular expression matching correct function names
+function-rgx=[a-z_][a-z0-9_]{2,30}$
+
+# Naming hint for function names
+function-name-hint=[a-z_][a-z0-9_]{2,30}$
+
+# Regular expression matching correct variable names
+variable-rgx=[a-z_][a-z0-9_]{2,30}$
+
+# Naming hint for variable names
+variable-name-hint=[a-z_][a-z0-9_]{2,30}$
+
+# Regular expression matching correct constant names
+const-rgx=(([A-Z_][A-Z0-9_]*)|(__.*__))$
+
+# Naming hint for constant names
+const-name-hint=(([A-Z_][A-Z0-9_]*)|(__.*__))$
+
+# Regular expression matching correct attribute names
+attr-rgx=[a-z_][a-z0-9_]{2,30}$
+
+# Naming hint for attribute names
+attr-name-hint=[a-z_][a-z0-9_]{2,30}$
+
+# Regular expression matching correct argument names
+argument-rgx=[a-z_][a-z0-9_]{2,30}$
+
+# Naming hint for argument names
+argument-name-hint=[a-z_][a-z0-9_]{2,30}$
+
+# Regular expression matching correct class attribute names
+class-attribute-rgx=([A-Za-z_][A-Za-z0-9_]{2,30}|(__.*__))$
+
+# Naming hint for class attribute names
+class-attribute-name-hint=([A-Za-z_][A-Za-z0-9_]{2,30}|(__.*__))$
+
+# Regular expression matching correct inline iteration names
+inlinevar-rgx=[A-Za-z_][A-Za-z0-9_]*$
+
+# Naming hint for inline iteration names
+inlinevar-name-hint=[A-Za-z_][A-Za-z0-9_]*$
+
+# Regular expression matching correct class names
+class-rgx=[A-Z_][a-zA-Z0-9]+$
+
+# Naming hint for class names
+class-name-hint=[A-Z_][a-zA-Z0-9]+$
+
+# Regular expression matching correct module names
+module-rgx=(([a-z_][a-z0-9_]*)|([A-Z][a-zA-Z0-9]+))$
+
+# Naming hint for module names
+module-name-hint=(([a-z_][a-z0-9_]*)|([A-Z][a-zA-Z0-9]+))$
+
+# Regular expression matching correct method names
+method-rgx=[a-z_][a-z0-9_]{2,30}$
+
+# Naming hint for method names
+method-name-hint=[a-z_][a-z0-9_]{2,30}$
+
+# Regular expression which should only match function or class names that do
+# not require a docstring.
+no-docstring-rgx=^_
+
+# Minimum line length for functions/classes that require docstrings, shorter
+# ones are exempt.
+docstring-min-length=-1
+
+
+[ELIF]
+
+# Maximum number of nested blocks for function / method body
+max-nested-blocks=5
+
+
+[FORMAT]
+
+# Maximum number of characters on a single line.
+max-line-length=100
+
+# Regexp for a line that is allowed to be longer than the limit.
+ignore-long-lines=^\s*(# )?<?https?://\S+>?$
+
+# Allow the body of an if to be on the same line as the test if there is no
+# else.
+single-line-if-stmt=no
+
+# List of optional constructs for which whitespace checking is disabled. `dict-
+# separator` is used to allow tabulation in dicts, etc.: {1  : 1,\n222: 2}.
+# `trailing-comma` allows a space between comma and closing bracket: (a, ).
+# `empty-line` allows space-only lines.
+no-space-check=trailing-comma,dict-separator
+
+# Maximum number of lines in a module
+max-module-lines=1000
+
+# String used as indentation unit. This is usually "    " (4 spaces) or "\t" (1
+# tab).
+indent-string='    '
+
+# Number of spaces of indent required inside a hanging  or continued line.
+indent-after-paren=4
+
+# Expected format of line ending, e.g. empty (any line ending), LF or CRLF.
+expected-line-ending-format=
+
+
+[LOGGING]
+
+# Logging modules to check that the string format arguments are in logging
+# function parameter format
+logging-modules=logging
+
+
+[MISCELLANEOUS]
+
+# List of note tags to take in consideration, separated by a comma.
+notes=FIXME,XXX,TODO
+
+
+[SIMILARITIES]
+
+# Minimum lines number of a similarity.
+min-similarity-lines=4
+
+# Ignore comments when computing similarities.
+ignore-comments=yes
+
+# Ignore docstrings when computing similarities.
+ignore-docstrings=yes
+
+# Ignore imports when computing similarities.
+ignore-imports=no
+
+
+[SPELLING]
+
+# Spelling dictionary name. Available dictionaries: none. To make it working
+# install python-enchant package.
+spelling-dict=
+
+# List of comma separated words that should not be checked.
+spelling-ignore-words=
+
+# A path to a file that contains private dictionary; one word per line.
+spelling-private-dict-file=
+
+# Tells whether to store unknown words to indicated private dictionary in
+# --spelling-private-dict-file option instead of raising a message.
+spelling-store-unknown-words=no
+
+
+[TYPECHECK]
+
+# Tells whether missing members accessed in mixin class should be ignored. A
+# mixin class is detected if its name ends with "mixin" (case insensitive).
+ignore-mixin-members=yes
+
+# List of module names for which member attributes should not be checked
+# (useful for modules/projects where namespaces are manipulated during runtime
+# and thus existing member attributes cannot be deduced by static analysis. It
+# supports qualified module names, as well as Unix pattern matching.
+ignored-modules=
+
+# List of class names for which member attributes should not be checked (useful
+# for classes with dynamically set attributes). This supports the use of
+# qualified names.
+ignored-classes=optparse.Values,thread._local,_thread._local
+
+# List of members which are set dynamically and missed by pylint inference
+# system, and so shouldn't trigger E1101 when accessed. Python regular
+# expressions are accepted.
+generated-members=
+
+# List of decorators that produce context managers, such as
+# contextlib.contextmanager. Add to this list to register other decorators that
+# produce valid context managers.
+contextmanager-decorators=contextlib.contextmanager
+
+
+[VARIABLES]
+
+# Tells whether we should check for unused import in __init__ files.
+init-import=no
+
+# A regular expression matching the name of dummy variables (i.e. expectedly
+# not used).
+dummy-variables-rgx=(_+[a-zA-Z0-9]*?$)|dummy
+
+# List of additional names supposed to be defined in builtins. Remember that
+# you should avoid to define new builtins when possible.
+additional-builtins=
+
+# List of strings which can identify a callback function by name. A callback
+# name must start or end with one of those strings.
+callbacks=cb_,_cb
+
+# List of qualified module names which can have objects that can redefine
+# builtins.
+redefining-builtins-modules=six.moves,future.builtins,builtins
+
+
+[CLASSES]
+
+# List of method names used to declare (i.e. assign) instance attributes.
+defining-attr-methods=__init__,__new__,setUp
+
+# List of valid names for the first argument in a class method.
+valid-classmethod-first-arg=cls
+
+# List of valid names for the first argument in a metaclass class method.
+valid-metaclass-classmethod-first-arg=mcs
+
+# List of member names, which should be excluded from the protected access
+# warning.
+exclude-protected=_asdict,_fields,_replace,_source,_make
+
+
+[DESIGN]
+
+# Maximum number of arguments for function / method
+max-args=5
+
+# Argument names that match this expression will be ignored. Default to name
+# with leading underscore
+ignored-argument-names=_.*
+
+# Maximum number of locals for function / method body
+max-locals=15
+
+# Maximum number of return / yield for function / method body
+max-returns=6
+
+# Maximum number of branch for function / method body
+max-branches=12
+
+# Maximum number of statements in function / method body
+max-statements=50
+
+# Maximum number of parents for a class (see R0901).
+max-parents=7
+
+# Maximum number of attributes for a class (see R0902).
+max-attributes=7
+
+# Minimum number of public methods for a class (see R0903).
+min-public-methods=2
+
+# Maximum number of public methods for a class (see R0904).
+max-public-methods=20
+
+# Maximum number of boolean expressions in a if statement
+max-bool-expr=5
+
+
+[IMPORTS]
+
+# Deprecated modules which should not be used, separated by a comma
+deprecated-modules=regsub,TERMIOS,Bastion,rexec
+
+# Create a graph of every (i.e. internal and external) dependencies in the
+# given file (report RP0402 must not be disabled)
+import-graph=
+
+# Create a graph of external dependencies in the given file (report RP0402 must
+# not be disabled)
+ext-import-graph=
+
+# Create a graph of internal dependencies in the given file (report RP0402 must
+# not be disabled)
+int-import-graph=
+
+# Force import order to recognize a module as part of the standard
+# compatibility libraries.
+known-standard-library=
+
+# Force import order to recognize a module as part of a third party library.
+known-third-party=enchant
+
+# Analyse import fallback blocks. This can be used to support both Python 2 and
+# 3 compatible code, which means that the block might have code that exists
+# only in one or another interpreter, leading to false positives when analysed.
+analyse-fallback-blocks=no
+
+
+[EXCEPTIONS]
+
+# Exceptions that will emit a warning when being caught. Defaults to
+# "Exception"
+overgeneral-exceptions=Exception

.gitignore

@@ -1,3 +1,6 @@
 build
 *.json
-config.py
+*.pyc
+*.swp
+*.swo
+*.db

LICENSE.md

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2017 Phyks (Lucas Verney)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -0,0 +1,115 @@
+Flatisfy
+========
+
+Flatisfy is your new companion to ease your search of a new housing :)
+
+
+It uses [Weboob](http://weboob.org/) to get all the housing posts on most of
+the websites offering housings posts, and then offers a bunch of pipelines to
+filter and deduplicate the fetched housings.
+
+
+It can be used as a command-line utility, but also exposes a web API and
+visualisation, to browse through the results.
+
+
+_Note_: It is targeted at French users (due to the currently supported
+websites), and in particular at people living close to Paris, as I developped
+it for my personal use, and am currently living in Paris :) Any feedback and
+merge requests to better support other countries / cities are more than
+welcome!
+
+_Note_: In this repository and across the code, I am using the name "flat". I
+use it as a placeholder for "housing" and consider both are interchangeable.
+This code is not restricted to handling flats only!
+
+
+## Getting started
+
+1. Clone the repository.
+2. Install required Python modules: `pip install -r requirements.txt`.
+3. Init a configuration file: `python -m flatisfy init-config > config.json`.
+   Edit it according to your needs (see below).
+4. Build the required data files:
+   `python -m flatisfy build-data --config config.json`.
+5. Use it to `fetch` (and output a filtered JSON list of flats) or `import`
+   (into an SQLite database, for the web visualization) a list of flats
+   matching your criteria.
+6. Use `python -m flatisfy serve --config config.json` to serve the web app.
+
+
+## Configuration
+
+List of configuration options:
+
+* `data_directory` is the directory in which you want data files to be stored.
+  `null` is the default value and means default `XDG` location (typically
+  `~/.local/share/flatisfy/`)
+* `max_entries` is the maximum number of entries to fetch **per Weboob
+  backend** (that is per housing website).
+* `passes` is the number of passes to run on the data. First pass is a basic
+  filtering and using only the informations from the housings list page.
+  Second pass loads any possible information about the filtered flats and does
+  better filtering.
+* `queries` is a list of queries defined in `flatboob` that should be fetched.
+* `database` is an SQLAlchemy URI to a database file. Defaults to `null` which
+  means that it will store the database in the default location, in
+  `data_directory`.
+* `navitia_api_key` is an API token for [Navitia](https://www.navitia.io/)
+  which is required to compute travel times.
+
+### Constraints
+
+You can specify constraints, under the `constraints` key. The available
+constraints are:
+
+* `area` (in m²), `bedrooms`, `cost` (in currency unit), `rooms`: this is a
+  tuple of `(min, max)` values, defining an interval in which the value should
+  lie. A `null` value means that any value is within this bound.
+* `postal_codes` is a list of allowed postal codes. You should include any
+  postal code you want, and especially the postal codes close to the precise
+  location you want. You MUST provide some postal codes.
+* `time_to` is a dictionary of places to compute travel time to them.
+  Typically,
+  ```
+  "time_to": {
+    "foobar": {
+        "gps": [LAT, LNG],
+        "time": [min, max]
+    }
+  }
+  ```
+  means that the housings must be between the `min` and `max` bounds (possibly
+  `null`) from the place identified by the GPS coordinates `LAT` and `LNG`
+  (latitude and longitude), and we call this place `foobar` in human-readable
+  form. Beware that `time` constraints are in **seconds**.
+
+
+## OpenData
+
+I am using the following datasets, available under `flatisfy/data_files`,
+which covers Paris. If you want to run the script using some other location,
+you might have to change these files by matching datasets.
+
+* [LaPoste Hexasmal](https://datanova.legroupe.laposte.fr/explore/dataset/laposte_hexasmal/?disjunctive.code_commune_insee&disjunctive.nom_de_la_commune&disjunctive.code_postal&disjunctive.libell_d_acheminement&disjunctive.ligne_5) for the list of cities and postal codes in France.
+* [RATP stations](https://data.ratp.fr/explore/dataset/positions-geographiques-des-stations-du-reseau-ratp/table/?disjunctive.stop_name&disjunctive.code_postal&disjunctive.departement) for the list of subway stations with their positions in Paris and nearby areas.
+
+Both datasets are licensed under the Open Data Commons Open Database License
+(ODbL): https://opendatacommons.org/licenses/odbl/.
+
+
+## License
+
+The content of this repository is licensed under an MIT license, unless
+explicitly mentionned otherwise.
+
+
+## Thanks
+
+* [Weboob](http://weboob.org/)
+* The OpenData providers listed above!
+* Navitia for their really cool public transportation API.
+* A lots of Python modules, required for this script (see `requirements.txt`).
+* [Kresus](https://framagit.org/bnjbvr/kresus) which gave me part of the
+  original idea (at least proved me such software based on scraping can
+  achieve a high quality level :)

flat.py

@@ -1,130 +0,0 @@
-# coding: utf-8
-#!/usr/bin/env python3
-import json
-import os
-import subprocess
-import sys
-
-from fuzzywuzzy import process as fuzzyprocess
-
-import config
-
-
-def pretty_json(json_str):
-    return json.dumps(json_str, indent=4, separators=(',', ': '),
-                      sort_keys=True)
-
-
-def preprocess_data():
-    if not os.path.isdir("build"):
-        os.mkdir("build")
-
-    if not os.path.isfile("build/ratp.json"):
-        ratp_data = []
-        with open("data/ratp.json", "r") as fh:
-            ratp_data = json.load(fh)
-        ratp_data = sorted(
-            list(set(
-                x["fields"]["stop_name"].lower() for x in ratp_data
-            ))
-        )
-        with open("build/ratp.json", "w") as fh:
-            fh.write(pretty_json(ratp_data))
-
-
-def fetch_flats_list():
-    flats_list = []
-    for query in config.QUERIES:
-        flatboob_output = subprocess.check_output(
-            ["flatboob", "-n", "0", "-f", "json", "load", query]
-        )
-        flats_list.extend(json.loads(flatboob_output))
-    return flats_list
-
-
-def remove_duplicates(flats_list):
-    unique_flats_list = []
-    ids = []
-    for flat in flats_list:
-        if flat["id"] in ids:
-            continue
-        ids.append(id)
-        unique_flats_list.append(flat)
-    return unique_flats_list
-
-
-def sort_by(flats_list, key="cost"):
-    return sorted(flats_list, key=lambda x: x["cost"])
-
-
-def refine_params(flats_list):
-    def filter_conditions(x):
-        is_ok = True
-        if "cost" in x:
-            cost = x["cost"]
-            is_ok = (
-                is_ok and
-                (cost < config.PARAMS["max_cost"] and
-                 cost > config.PARAMS["min_cost"])
-            )
-        if "area" in x:
-            area = x["area"]
-            is_ok = (
-                is_ok and
-                (area < config.PARAMS["max_area"] and
-                 area > config.PARAMS["min_area"])
-            )
-        return is_ok
-
-    return filter(filter_conditions, flats_list)
-
-
-def match_ratp(flats_list):
-    ratp_stations = []
-    with open("build/ratp.json", "r") as fh:
-        ratp_stations = json.load(fh)
-
-    for flat in flats_list:
-        if "station" in flat and flat["station"]:
-            # There is some station fetched by flatboob, try to match it
-            flat["ratp_station"] = fuzzyprocess.extractOne(
-                flat["station"], ratp_stations
-            )
-            # TODO: Cross-check station location to choose the best fit
-
-    return flats_list
-
-
-def main(dumpfile=None):
-    if dumpfile is None:
-        flats_list = fetch_flats_list()
-    else:
-        with open(dumpfile, "r") as fh:
-            flats_list = json.load(fh)
-
-    # First pass
-    flats_list = remove_duplicates(flats_list)
-    flats_list = sort_by(flats_list, "cost")
-    flats_list = refine_params(flats_list)
-
-    # TODO: flats_list = match_ratp(flats_list)
-
-    # TODO: Second pass, loading additional infos for each entry
-
-    return flats_list
-
-
-if __name__ == "__main__":
-    if len(sys.argv) > 1:
-        dumpfile = sys.argv[1]
-    else:
-        dumpfile = None
-
-    try:
-        preprocess_data()
-        flats_list = main(dumpfile)
-        print(
-            pretty_json(flats_list)
-        )
-    except KeyboardInterrupt:
-        pass

flatisfy/__init__.py

@@ -0,0 +1,5 @@
+# coding: utf-8
+"""
+``Flatisfy`` is a tool to help you find a new housing based on some criteria.
+"""
+__version__ = "0.1"

flatisfy/__main__.py

@@ -0,0 +1,176 @@
+# coding: utf-8
+"""
+Main entry point of the Flatisfy code.
+"""
+from __future__ import absolute_import, print_function, unicode_literals
+
+import argparse
+import logging
+import sys
+
+import flatisfy.config
+from flatisfy import cmds
+from flatisfy import data
+from flatisfy import tools
+
+
+LOGGER = logging.getLogger("flatisfy")
+
+
+def parse_args(argv=None):
+    """
+    Create parser and parse arguments.
+    """
+    parser = argparse.ArgumentParser(prog="Flatisfy",
+                                     description="Find the perfect flat.")
+
+    # Parent parser containing arguments common to any subcommand
+    parent_parser = argparse.ArgumentParser(add_help=False)
+    parent_parser.add_argument(
+        "--data-dir",
+        help="Location of Flatisfy data directory."
+    )
+    parent_parser.add_argument(
+        "--config",
+        help="Configuration file to use."
+    )
+    parent_parser.add_argument(
+        "--passes", choices=[0, 1, 2], type=int,
+        help="Number of passes to do on the filtered data."
+    )
+    parent_parser.add_argument(
+        "--max-entries", type=int,
+        help="Maximum number of entries to fetch."
+    )
+    parent_parser.add_argument(
+        "-v", "--verbose", action="store_true",
+        help="Verbose logging output."
+    )
+    parent_parser.add_argument(
+        "-vv", action="store_true",
+        help="Debug logging output."
+    )
+
+    # Subcommands
+    subparsers = parser.add_subparsers(
+        dest="cmd", help="Available subcommands"
+    )
+
+    # Build data subcommand
+    subparsers.add_parser(
+        "build-data", parents=[parent_parser],
+        help="Build necessary data"
+    )
+
+    # Init config subcommand
+    parser_init_config = subparsers.add_parser(
+        "init-config", parents=[parent_parser],
+        help="Initialize empty configuration."
+    )
+    parser_init_config.add_argument(
+        "output", nargs="?", help="Output config file. Use '-' for stdout."
+    )
+
+    # Fetch subcommand parser
+    subparsers.add_parser("fetch", parents=[parent_parser],
+                          help="Fetch housings posts")
+
+    # Filter subcommand parser
+    parser_filter = subparsers.add_parser("filter", parents=[parent_parser],
+                                          help=(
+                                              "Filter housings posts. No "
+                                              "fetching of additional infos "
+                                              "is done."))
+    parser_filter.add_argument(
+        "input",
+        help="JSON dump of the housings post to filter."
+    )
+
+    # Import subcommand parser
+    subparsers.add_parser("import", parents=[parent_parser],
+                          help="Import housing posts in database.")
+
+    # Serve subcommand parser
+    parser_serve = subparsers.add_parser("serve", parents=[parent_parser],
+                                         help="Serve the web app.")
+    parser_serve.add_argument("--port", type=int, help="Port to bind to.")
+    parser_serve.add_argument("--host", help="Host to listen on.")
+
+    return parser.parse_args(argv)
+
+
+def main():
+    """
+    Main module code.
+    """
+    # Parse arguments
+    args = parse_args()
+
+    # Set logger
+    if args.vv:
+        logging.basicConfig(level=logging.DEBUG)
+        logging.getLogger('sqlalchemy.engine').setLevel(logging.DEBUG)
+    elif args.verbose:
+        logging.basicConfig(level=logging.INFO)
+        # sqlalchemy INFO level is way too loud, just stick with WARNING
+        logging.getLogger('sqlalchemy.engine').setLevel(logging.WARNING)
+    else:
+        logging.basicConfig(level=logging.WARNING)
+        logging.getLogger('sqlalchemy.engine').setLevel(logging.WARNING)
+
+    # Init-config command
+    if args.cmd == "init-config":
+        flatisfy.config.init_config(args.output)
+        sys.exit(0)
+    else:
+        # Load config
+        config = flatisfy.config.load_config(args)
+        if config is None:
+            LOGGER.error("Invalid configuration. Exiting. "
+                         "Run init-config before if this is the first time "
+                         "you run Flatisfy.")
+            sys.exit(1)
+
+    # Build data files
+    try:
+        if args.cmd == "build-data":
+            data.preprocess_data(config, force=True)
+            sys.exit(0)
+        else:
+            data.preprocess_data(config)
+    except flatisfy.exceptions.DataBuildError:
+        sys.exit(1)
+
+    # Fetch command
+    if args.cmd == "fetch":
+        # Fetch and filter flats list
+        flats_list, _ = cmds.fetch_and_filter(config)
+        # Sort by cost
+        flats_list = tools.sort_list_of_dicts_by(flats_list, "cost")
+
+        print(
+            tools.pretty_json(flats_list)
+        )
+    # Filter command
+    elif args.cmd == "filter":
+        # Load and filter flats list
+        flats_list = cmds.load_and_filter(args.input, config)
+        # Sort by cost
+        flats_list = tools.sort_list_of_dicts_by(flats_list, "cost")
+
+        print(
+            tools.pretty_json(flats_list)
+        )
+    # Import command
+    elif args.cmd == "import":
+        cmds.import_and_filter(config)
+    # Serve command
+    elif args.cmd == "serve":
+        cmds.serve(config)
+
+
+if __name__ == "__main__":
+    try:
+        main()
+    except KeyboardInterrupt:
+        pass

flatisfy/cmds.py

@@ -0,0 +1,110 @@
+# coding: utf-8
+"""
+Main commands available for flatisfy.
+"""
+from __future__ import absolute_import, print_function, unicode_literals
+
+import flatisfy.filters
+from flatisfy import database
+from flatisfy.models import flat as flat_model
+from flatisfy import fetch
+from flatisfy import tools
+from flatisfy.web import app as web_app
+
+
+def fetch_and_filter(config):
+    """
+    Fetch the available flats list. Then, filter it according to criteria.
+
+    :param config: A config dict.
+    :return: A tuple of the list of all matching flats and the list of ignored
+    flats.
+    """
+    # TODO: Reduce load on housings listing websites
+    # Fetch flats list with flatboobs
+    flats_list = fetch.fetch_flats_list(config)
+
+    # Do a first pass with the available infos to try to remove as much
+    # unwanted postings as possible
+    if config["passes"] > 0:
+        flats_list, ignored_flats = flatisfy.filters.first_pass(flats_list,
+                                                                config)
+
+    # Do a second pass to consolidate all the infos we found and make use of
+    # additional infos
+    if config["passes"] > 1:
+        # Load additional infos
+        for flat in flats_list:
+            details = fetch.fetch_details(flat["id"])
+            flat = tools.merge_dicts(flat, details)
+
+        flats_list, extra_ignored_flats = flatisfy.filters.second_pass(
+            flats_list, config
+        )
+        ignored_flats.extend(extra_ignored_flats)
+
+    return flats_list, ignored_flats
+
+
+def load_and_filter(housing_file, config):
+    """
+    Load the dumped flats list. Then, filter it according to criteria.
+
+    :param housing_file: The JSON file to load flats from.
+    :param config: A config dict.
+    :return: A tuple of the list of all matching flats and the list of ignored
+    flats.
+    """
+    # Load flats list
+    flats_list = fetch.load_flats_list(housing_file)
+
+    # Do a first pass with the available infos to try to remove as much
+    # unwanted postings as possible
+    if config["passes"] > 0:
+        flats_list, ignored_flats = flatisfy.filters.first_pass(flats_list,
+                                                                config)
+
+    # Do a second pass to consolidate all the infos we found
+    if config["passes"] > 1:
+        flats_list, extra_ignored_flats = flatisfy.filters.second_pass(
+            flats_list, config
+        )
+        ignored_flats.extend(extra_ignored_flats)
+
+    return flats_list, ignored_flats
+
+
+def import_and_filter(config):
+    """
+    Fetch the available flats list. Then, filter it according to criteria.
+    Finally, store it in the database.
+
+    :param config: A config dict.
+    :return: ``None``.
+    """
+    # Fetch and filter flats list
+    flats_list, purged_list = fetch_and_filter(config)
+    # Create database connection
+    get_session = database.init_db(config["database"])
+
+    with get_session() as session:
+        for flat_dict in flats_list:
+            flat = flat_model.Flat.from_dict(flat_dict)
+            session.merge(flat)
+
+        for flat_dict in purged_list:
+            flat = flat_model.Flat.from_dict(flat_dict)
+            flat.status = flat_model.FlatStatus.purged
+            session.merge(flat)
+
+
+def serve(config):
+    """
+    Serve the web app.
+
+    :param config: A config dict.
+    :return: ``None``, long-running process.
+    """
+    app = web_app.get_app(config)
+    # TODO: Make Bottle use logging module
+    app.run(host=config["host"], port=config["port"])

flatisfy/config.py

@@ -0,0 +1,208 @@
+# coding: utf-8
+"""
+This module handles the configuration management for Flatisfy.
+
+It loads the default configuration, then overloads it with the provided config
+file and then overloads it with command-line options.
+"""
+from __future__ import absolute_import, print_function, unicode_literals
+from builtins import str
+
+import json
+import logging
+import os
+import sys
+import traceback
+
+import appdirs
+
+from flatisfy import tools
+
+
+# Default configuration
+DEFAULT_CONFIG = {
+    # Flatboob queries to fetch
+    "queries": [],
+    # Constraints to match
+    "constraints": {
+        "postal_codes": [],  # List of postal codes
+        "area": (None, None),  # (min, max) in m^2
+        "cost": (None, None),  # (min, max) in currency unit
+        "rooms": (None, None),  # (min, max)
+        "bedrooms": (None, None),  # (min, max)
+        "time_to": {}  # Dict mapping names to {"gps": [lat, lng],
+                       #                        "time": (min, max) }
+                       # Time is in seconds
+    },
+    # Navitia API key
+    "navitia_api_key": None,
+    # Number of filtering passes to run
+    "passes": 2,
+    # Maximum number of entries to fetch
+    "max_entries": None,
+    # Directory in wich data will be put. ``None`` is XDG default location.
+    "data_directory": None,
+    # SQLAlchemy URI to the database to use
+    "database": None,
+    # Web app port
+    "port": 8080,
+    # Web app host to listen on
+    "host": "127.0.0.1"
+}
+
+LOGGER = logging.getLogger(__name__)
+
+
+def validate_config(config):
+    """
+    Check that the config passed as argument is a valid configuration.
+
+    :param config: A config dictionary to fetch.
+    :return: ``True`` if the configuration is valid, ``False`` otherwise.
+    """
+    def _check_constraints_bounds(bounds):
+        """
+        Check the bounds for numeric constraints.
+        """
+        assert len(bounds) == 2
+        assert all(
+            x is None or
+            (
+                (isinstance(x, int) or isinstance(x, float)) and
+                x >= 0
+            )
+            for x in bounds
+        )
+        if bounds[0] is not None and bounds[1] is not None:
+            assert bounds[1] > bounds[0]
+
+    try:
+        # Note: The traceback fetching code only handle single line asserts.
+        # Then, we disable line-too-long pylint check and E501 flake8 checks
+        # and use long lines whenever needed, in order to have the full assert
+        # message in the log output.
+        # pylint: disable=line-too-long
+        assert "postal_codes" in config["constraints"]
+        assert len(config["constraints"]["postal_codes"]) > 0
+
+        assert "area" in config["constraints"]
+        _check_constraints_bounds(config["constraints"]["area"])
+
+        assert "cost" in config["constraints"]
+        _check_constraints_bounds(config["constraints"]["cost"])
+
+        assert "rooms" in config["constraints"]
+        _check_constraints_bounds(config["constraints"]["rooms"])
+
+        assert "bedrooms" in config["constraints"]
+        _check_constraints_bounds(config["constraints"]["bedrooms"])
+
+        assert "time_to" in config["constraints"]
+        assert isinstance(config["constraints"]["time_to"], dict)
+        for name, item in config["constraints"]["time_to"].items():
+            assert isinstance(name, str)
+            assert "gps" in item
+            assert isinstance(item["gps"], list)
+            assert len(item["gps"]) == 2
+            assert "time" in item
+            _check_constraints_bounds(item["time"])
+
+        assert config["passes"] in [0, 1, 2]
+        assert config["max_entries"] is None or (isinstance(config["max_entries"], int) and config["max_entries"] > 0)  # noqa: E501
+
+        assert config["data_directory"] is None or isinstance(config["data_directory"], str)  # noqa: E501
+
+        assert config["database"] is None or isinstance(config["database"], str)  # noqa: E501
+
+        assert isinstance(config["port"], int)
+        assert isinstance(config["host"], str)
+
+        return True
+    except (AssertionError, KeyError):
+        _, _, exc_traceback = sys.exc_info()
+        return traceback.extract_tb(exc_traceback)[-1][-1]
+
+
+def load_config(args=None):
+    """
+    Load the configuration from file.
+
+    :param args: An argparse args structure.
+    :return: The loaded config dict.
+    """
+    LOGGER.info("Initializing configuration...")
+    # Default configuration
+    config_data = DEFAULT_CONFIG.copy()
+
+    # Load config from specified JSON
+    if args and getattr(args, "config", None):
+        LOGGER.debug("Loading configuration from %s.", args.config)
+        try:
+            with open(args.config, "r") as fh:
+                config_data.update(json.load(fh))
+        except (IOError, ValueError):
+            LOGGER.error(
+                "Unable to load configuration from file, "
+                "using default configuration."
+            )
+
+    # Overload config with arguments
+    if args and getattr(args, "passes", None) is not None:
+        LOGGER.debug(
+            "Overloading number of passes from CLI arguments: %d.",
+            args.passes
+        )
+        config_data["passes"] = args.passes
+    if args and getattr(args, "max_entries", None) is not None:
+        LOGGER.debug(
+            "Overloading maximum number of entries from CLI arguments: %d.",
+            args.max_entries
+        )
+        config_data["max_entries"] = args.max_entries
+    if args and getattr(args, "port", None) is not None:
+        LOGGER.debug("Overloading web app port: %d.", args.port)
+        config_data["port"] = args.port
+    if args and getattr(args, "host", None) is not None:
+        LOGGER.debug("Overloading web app host: %s.", args.host)
+        config_data["host"] = str(args.host)
+
+    # Handle data_directory option
+    if args and getattr(args, "data_dir", None) is not None:
+        LOGGER.debug("Overloading data directory from CLI arguments.")
+        config_data["data_directory"] = args.data_dir
+    elif config_data["data_directory"] is None:
+        config_data["data_directory"] = appdirs.user_data_dir(
+            "flatisfy",
+            "flatisfy"
+        )
+        LOGGER.debug("Using default XDG data directory: %s.",
+                     config_data["data_directory"])
+
+    if config_data["database"] is None:
+        config_data["database"] = "sqlite:///" + os.path.join(
+            config_data["data_directory"],
+            "flatisfy.db"
+        )
+
+    config_validation = validate_config(config_data)
+    if config_validation is True:
+        LOGGER.info("Config has been fully initialized.")
+        return config_data
+    else:
+        LOGGER.error("Error in configuration: %s.", config_validation)
+        return None
+
+
+def init_config(output=None):
+    """
+    Initialize an empty configuration file.
+
+    :param output: File to output content to. Defaults to ``stdin``.
+    """
+    config_data = DEFAULT_CONFIG.copy()
+
+    if output and output != "-":
+        with open(output, "w") as fh:
+            fh.write(tools.pretty_json(config_data))
+    else:
+        print(tools.pretty_json(config_data))

flatisfy/data.py

@@ -0,0 +1,163 @@
+# coding : utf-8
+"""
+This module contains all the code related to building necessary data files from
+the source opendata files.
+"""
+from __future__ import absolute_import, print_function, unicode_literals
+
+import collections
+import json
+import logging
+import os
+
+import flatisfy.exceptions
+
+
+LOGGER = logging.getLogger(__name__)
+MODULE_DIR = os.path.dirname(os.path.realpath(__file__))
+
+
+def _preprocess_ratp(output_dir):
+    """
+    Build RATP file from the RATP data.
+
+    :param output_dir: Directory in which the output file should reside.
+    :return: ``True`` on successful build, ``False`` otherwise.
+    """
+    ratp_data_raw = []
+    # Load opendata file
+    try:
+        with open(os.path.join(MODULE_DIR, "data_files/ratp.json"), "r") as fh:
+            ratp_data_raw = json.load(fh)
+    except (IOError, ValueError):
+        LOGGER.error("Invalid raw RATP opendata file.")
+        return False
+
+    # Process it
+    ratp_data = collections.defaultdict(list)
+    for item in ratp_data_raw:
+        stop_name = item["fields"]["stop_name"].lower()
+        ratp_data[stop_name].append(item["fields"]["coord"])
+
+    # Output it
+    with open(os.path.join(output_dir, "ratp.json"), "w") as fh:
+        json.dump(ratp_data, fh)
+
+    return True
+
+
+def _preprocess_laposte(output_dir):
+    """
+    Build JSON files from the postal codes data.
+
+    :param output_dir: Directory in which the output file should reside.
+    :return: ``True`` on successful build, ``False`` otherwise.
+    """
+    raw_laposte_data = []
+    # Load opendata file
+    try:
+        with open(
+            os.path.join(MODULE_DIR, "data_files/laposte.json"), "r"
+        ) as fh:
+            raw_laposte_data = json.load(fh)
+    except (IOError, ValueError):
+        LOGGER.error("Invalid raw LaPoste opendata file.")
+        return False
+
+    # Build postal codes to other infos file
+    postal_codes_data = {}
+    for item in raw_laposte_data:
+        try:
+            postal_codes_data[item["fields"]["code_postal"]] = {
+                "gps": item["fields"]["coordonnees_gps"],
+                "nom": item["fields"]["nom_de_la_commune"].title()
+            }
+        except KeyError:
+            LOGGER.info("Missing data for postal code %s, skipping it.",
+                        item["fields"]["code_postal"])
+    with open(os.path.join(output_dir, "postal_codes.json"), "w") as fh:
+        json.dump(postal_codes_data, fh)
+
+    # Build city name to postal codes and other infos file
+    cities_data = {}
+    for item in raw_laposte_data:
+        try:
+            cities_data[item["fields"]["nom_de_la_commune"].title()] = {
+                "gps": item["fields"]["coordonnees_gps"],
+                "postal_code": item["fields"]["code_postal"]
+            }
+        except KeyError:
+            LOGGER.info("Missing data for city %s, skipping it.",
+                        item["fields"]["nom_de_la_commune"])
+    with open(os.path.join(output_dir, "cities.json"), "w") as fh:
+        json.dump(cities_data, fh)
+
+    return True
+
+
+def preprocess_data(config, force=False):
+    """
+    Ensures that all the necessary data files have been built from the raw
+    opendata files.
+
+    :params config: A config dictionary.
+    :params force: Whether to force rebuild or not.
+    """
+    LOGGER.debug("Data directory is %s.", config["data_directory"])
+    opendata_directory = os.path.join(config["data_directory"], "opendata")
+    try:
+        LOGGER.info("Ensuring the data directory exists.")
+        os.makedirs(opendata_directory)
+        LOGGER.debug("Created opendata directory at %s.", opendata_directory)
+    except OSError:
+        LOGGER.debug("Opendata directory already existed, doing nothing.")
+
+    is_built_ratp = os.path.isfile(
+        os.path.join(opendata_directory, "ratp.json")
+    )
+    if not is_built_ratp or force:
+        LOGGER.info("Building from RATP data.")
+        if not _preprocess_ratp(opendata_directory):
+            raise flatisfy.exceptions.DataBuildError("Error with RATP data.")
+
+    is_built_laposte = (
+        os.path.isfile(os.path.join(opendata_directory, "cities.json")) and
+        os.path.isfile(os.path.join(opendata_directory, "postal_codes.json"))
+    )
+    if not is_built_laposte or force:
+        LOGGER.info("Building from LaPoste data.")
+        if not _preprocess_laposte(opendata_directory):
+            raise flatisfy.exceptions.DataBuildError(
+                "Error with LaPoste data."
+            )
+
+
+def load_data(data_type, config):
+    """
+    Load a given built data file.
+
+    :param data_type: A valid data identifier.
+    :param config: A config dictionary.
+    :return: The loaded data. ``None`` if the query is incorrect.
+    """
+    if data_type not in ["postal_codes", "cities", "ratp"]:
+        LOGGER.error("Invalid request. No %s data file.", data_type)
+        return None
+
+    opendata_directory = os.path.join(config["data_directory"], "opendata")
+    datafile_path = os.path.join(opendata_directory, "%s.json" % data_type)
+    data = {}
+    try:
+        with open(datafile_path, "r") as fh:
+            data = json.load(fh)
+    except IOError:
+        LOGGER.error("No such data file: %s.", datafile_path)
+        return None
+    except ValueError:
+        LOGGER.error("Invalid JSON data file: %s.", datafile_path)
+        return None
+
+    if len(data) == 0:
+        LOGGER.warning("Loading empty data for %s.", data_type)
+
+    return data

flatisfy/database/__init__.py

@@ -0,0 +1,64 @@
+# coding: utf-8
+"""
+This module contains functions related to the database.
+"""
+from __future__ import absolute_import, print_function, unicode_literals
+
+import sqlite3
+
+from contextlib import contextmanager
+
+from sqlalchemy import event, create_engine
+from sqlalchemy.engine import Engine
+from sqlalchemy.orm import sessionmaker
+
+import flatisfy.models.flat  # noqa: F401
+from flatisfy.database.base import BASE
+
+
+@event.listens_for(Engine, "connect")
+def set_sqlite_pragma(dbapi_connection, _):
+    """
+    Auto enable foreign keys for SQLite.
+    """
+    # Play well with other DB backends
+    if isinstance(dbapi_connection, sqlite3.Connection):
+        cursor = dbapi_connection.cursor()
+        cursor.execute("PRAGMA foreign_keys=ON")
+        cursor.close()
+
+
+def init_db(database_uri=None):
+    """
+    Initialize the database, ensuring tables exist etc.
+
+    :param database_uri: An URI describing an engine to use. Defaults to
+    in-memory SQLite database.
+    :return: A tuple of an SQLAlchemy session maker and the created engine.
+    """
+    if database_uri is None:
+        database_uri = "sqlite:///:memory:"
+
+    engine = create_engine(database_uri)
+    BASE.metadata.create_all(engine, checkfirst=True)
+    Session = sessionmaker(bind=engine)  # pylint: disable=invalid-name
+
+    @contextmanager
+    def get_session():
+        """
+        Provide a transactional scope around a series of operations.
+
+        From [1].
+        [1]: http://docs.sqlalchemy.org/en/latest/orm/session_basics.html#when-do-i-construct-a-session-when-do-i-commit-it-and-when-do-i-close-it.
+        """
+        session = Session()
+        try:
+            yield session
+            session.commit()
+        except:
+            session.rollback()
+            raise
+        finally:
+            session.close()
+
+    return get_session

flatisfy/database/base.py

@@ -0,0 +1,10 @@
+# coding: utf-8
+"""
+This module contains the definition of the declarative SQLAlchemy base.
+"""
+from __future__ import absolute_import, print_function, unicode_literals
+
+from sqlalchemy.ext.declarative import declarative_base
+
+
+BASE = declarative_base()

flatisfy/database/types.py

@@ -0,0 +1,48 @@
+# coding: utf-8
+"""
+This modules implements custom types in SQLAlchemy.
+"""
+from __future__ import absolute_import, print_function, unicode_literals
+
+import json
+
+import sqlalchemy.types as types
+
+
+class StringyJSON(types.TypeDecorator):
+    """
+    Stores and retrieves JSON as TEXT for SQLite.
+
+    From
+    https://avacariu.me/articles/2016/compiling-json-as-text-for-sqlite-with-sqlalchemy.
+
+    .. note :: The associated field is immutable. That is, changes to the data
+    (typically, changing the value of a dict field) will not trigger an update
+    on the SQL side upon ``commit`` as the reference to the object will not
+    have been updated. One should force the update by forcing an update of the
+    reference (by performing a ``copy`` operation on the dict for instance).
+    """
+
+    impl = types.TEXT
+
+    def process_bind_param(self, value, dialect):
+        """
+        TODO
+        """
+        if value is not None:
+            value = json.dumps(value)
+        return value
+
+    def process_result_value(self, value, dialect):
+        """
+        TODO
+        """
+        if value is not None:
+            value = json.loads(value)
+        return value
+
+
+# TypeEngine.with_variant says "use StringyJSON instead when
+# connecting to 'sqlite'"
+# pylint: disable=invalid-name
+MagicJSON = types.JSON().with_variant(StringyJSON, 'sqlite')

flatisfy/exceptions.py

@@ -0,0 +1,13 @@
+# coding : utf-8
+"""
+This module contains all the exceptions definitions for the Flatisfy-specific
+exceptions.
+"""
+from __future__ import absolute_import, print_function, unicode_literals
+
+
+class DataBuildError(Exception):
+    """
+    Error occurring on building a data file.
+    """
+    pass

flatisfy/fetch.py

@@ -0,0 +1,76 @@
+# coding: utf-8
+"""
+This module contains all the code related to fetching and loading flats lists.
+"""
+from __future__ import absolute_import, print_function, unicode_literals
+
+import json
+import logging
+import subprocess
+
+
+LOGGER = logging.getLogger(__name__)
+
+
+def fetch_flats_list(config):
+    """
+    Fetch the available flats using the Flatboob / Weboob config.
+
+    :param config: A config dict.
+    :return: A list of all available flats.
+    """
+    flats_list = []
+    for query in config["queries"]:
+        max_entries = config["max_entries"]
+        if max_entries is None:
+            max_entries = 0
+
+        LOGGER.info("Loading flats from query %s.", query)
+        flatboob_output = subprocess.check_output(
+            ["../weboob/tools/local_run.sh", "../weboob/scripts/flatboob",
+             "-n", str(max_entries), "-f", "json", "load", query]
+        )
+        query_flats_list = json.loads(flatboob_output)
+        LOGGER.info("Fetched %d flats.", len(query_flats_list))
+        flats_list.extend(query_flats_list)
+    LOGGER.info("Fetched a total of %d flats.", len(flats_list))
+    return flats_list
+
+
+def fetch_details(flat_id):
+    """
+    Fetch the additional details for a flat using Flatboob / Weboob.
+
+    :param flat_id: ID of the flat to fetch details for.
+    :return: A flat dict with all the available data.
+    """
+    LOGGER.info("Loading additional details for flat %s.", flat_id)
+    flatboob_output = subprocess.check_output(
+        ["../weboob/tools/local_run.sh", "../weboob/scripts/flatboob",
+         "-f", "json", "info", flat_id]
+    )
+    flat_details = json.loads(flatboob_output)
+    LOGGER.info("Fetched details for flat %s.", flat_id)
+
+    if flat_details:
+        flat_details = flat_details[0]
+
+    return flat_details
+
+
+def load_flats_list(json_file):
+    """
+    Load a dumped flats list from JSON file.
+
+    :param json_file: The file to load housings list from.
+    :return: A list of all the flats in the dump file.
+    """
+    flats_list = []
+    try:
+        LOGGER.info("Loading flats list from file %s", json_file)
+        with open(json_file, "r") as fh:
+            flats_list = json.load(fh)
+        LOGGER.info("Found %d flats.", len(flats_list))
+    except (IOError, ValueError):
+        LOGGER.error("File %s is not a valid dump file.", json_file)
+    return flats_list

flatisfy/filters/__init__.py

@@ -0,0 +1,153 @@
+# coding: utf-8
+"""
+This module contains all the filtering functions. It exposes ``first_pass`` and
+``second_pass`` functions which are a set of filters applied during the first
+pass and the second pass.
+"""
+from __future__ import absolute_import, print_function, unicode_literals
+
+import logging
+
+from flatisfy import tools
+from flatisfy.filters import duplicates
+from flatisfy.filters import metadata
+
+
+LOGGER = logging.getLogger(__name__)
+
+
+def refine_with_housing_criteria(flats_list, config):
+    """
+    Filter a list of flats according to criteria.
+
+    Housings posts websites tend to return broader results that what was
+    actually asked for. Then, we should filter out the list to match the
+    user criteria, and avoid exposing unwanted flats.
+
+    :param flats_list: A list of flats dict to filter.
+    :param config: A config dict.
+    :return: A tuple of flats to keep and flats to delete.
+    """
+    # For each flat, the associated `is_ok` value indicate whether it should be
+    # kept or discarded.
+    is_ok = [True for _ in flats_list]
+
+    for i, flat in enumerate(flats_list):
+        # Check postal code
+        postal_code = flat["flatisfy"].get("postal_code", None)
+        if (
+                postal_code and
+                postal_code not in config["constraints"]["postal_codes"]
+        ):
+            LOGGER.info("Postal code for flat %s is out of range.", flat["id"])
+            is_ok[i] = is_ok[i] and False
+
+        # Check time_to
+        for place_name, time in flat["flatisfy"].get("time_to", {}).items():
+            is_within_interval = tools.is_within_interval(
+                time,
+                *(config["constraints"]["time_to"][place_name]["time"])
+            )
+            if not is_within_interval:
+                LOGGER.info("Flat %s is too far from place %s.",
+                            flat["id"], place_name)
+            is_ok[i] = is_ok[i] and is_within_interval
+
+        # Check other fields
+        for field in ["area", "cost", "rooms", "bedrooms"]:
+            interval = config["constraints"][field]
+            is_within_interval = tools.is_within_interval(
+                flat.get(field, None),
+                *interval
+            )
+            if not is_within_interval:
+                LOGGER.info("%s for flat %s is out of range.",
+                            field.capitalize(), flat["id"])
+            is_ok[i] = is_ok[i] and is_within_interval
+
+    return (
+        [
+            flat
+            for i, flat in enumerate(flats_list)
+            if is_ok[i]
+        ],
+        [
+            flat
+            for i, flat in enumerate(flats_list)
+            if not is_ok[i]
+        ]
+    )
+
+
+def first_pass(flats_list, config):
+    """
+    First filtering pass.
+
+    Flatboob only fetches data from the listing of the available housing. Then,
+    we should do a first pass to filter based on the already available data and
+    only request more data for the remaining housings.
+
+    :param flats_list: A list of flats dict to filter.
+    :param config: A config dict.
+    :return: A tuple of processed flats and purged flats.
+    """
+    LOGGER.info("Running first filtering pass.")
+    # Handle duplicates based on ids
+    # Just remove them (no merge) as they should be the exact same object.
+    flats_list = duplicates.detect(
+        flats_list, key="id", merge=False
+    )
+    # Also merge duplicates based on url (these may come from different
+    # flatboob backends)
+    # This is especially useful as some websites such as entreparticuliers
+    # contains a lot of leboncoin housings posts.
+    flats_list = duplicates.detect(
+        flats_list, key="url", merge=True
+    )
+
+    # Add the flatisfy metadata entry
+    flats_list = metadata.init(flats_list)
+    # Guess the postal codes
+    flats_list = metadata.guess_postal_code(flats_list, config)
+    # Try to match with stations
+    flats_list = metadata.guess_stations(flats_list, config)
+    # Remove returned housing posts that do not match criteria
+    flats_list, purged_list = refine_with_housing_criteria(flats_list, config)
+
+    return (flats_list, purged_list)
+
+
+def second_pass(flats_list, config):
+    """
+    Second filtering pass.
+
+    This pass is expected to have as most information as possible on the
+    available housings. Plus it runs after first pass which already
+    consolidated data.
+
+    It should consolidate everything and try to extract as many data as
+    possible from the fetched housings.
+
+    :param flats_list: A list of flats dict to filter.
+    :param config: A config dict.
+    :return: A tuple of processed flats and purged flats.
+    """
+    LOGGER.info("Running second filtering pass.")
+    # Assumed to run after first pass, so there should be no obvious duplicates
+    # left and we already tried to find postal code and nearby stations.
+
+    # Confirm postal code
+    flats_list = metadata.guess_postal_code(flats_list, config)
+
+    # TODO: Guess the address
+
+    # Better match with stations (confirm and check better)
+    flats_list = metadata.guess_stations(flats_list, config)
+
+    # Compute travel time to specified points
+    flats_list = metadata.compute_travel_times(flats_list, config)
+
+    # Remove returned housing posts that do not match criteria
+    flats_list, purged_list = refine_with_housing_criteria(flats_list, config)
+
+    return (flats_list, purged_list)

flatisfy/filters/duplicates.py

@@ -0,0 +1,56 @@
+# coding: utf-8
+"""
+Filtering functions to detect and merge duplicates.
+"""
+from __future__ import absolute_import, print_function, unicode_literals
+
+import collections
+
+from flatisfy import tools
+
+
+def detect(flats_list, key="id", merge=True):
+    """
+    Detect obvious duplicates within a given list of flats.
+
+    There may be duplicates found, as some queries could overlap (especially
+    since when asking for a given place, websites tend to return housings in
+    nearby locations as well). We need to handle them, by either deleting the
+    duplicates (``merge=False``) or merging them together in a single flat
+    object.
+
+    :param flats_list: A list of flats dicts.
+    :param key: The flat dicts key on which the duplicate detection should be
+    done.
+    :param merge: Whether the found duplicates should be merged or we should
+    only keep one of them.
+
+    :return: A deduplicated list of flat dicts.
+    """
+    # TODO: Keep track of found duplicates?
+    # ``seen`` is a dict mapping aggregating the flats by the deduplication
+    # keys. We basically make buckets of flats for every key value. Flats in
+    # the same bucket should be merged together afterwards.
+    seen = collections.defaultdict(list)
+    for flat in flats_list:
+        seen[flat.get(key, None)].append(flat)
+
+    # Generate the unique flats list based on these buckets
+    unique_flats_list = []
+    for flat_key, matching_flats in seen.items():
+        if flat_key is None:
+            # If the key is None, it means Weboob could not load the data. In
+            # this case, we consider every matching item as being independant
+            # of the others, to avoid over-deduplication.
+            unique_flats_list.extend(matching_flats)
+        else:
+            # Otherwise, check the policy
+            if merge:
+                # If a merge is requested, do the merge
+                unique_flats_list.append(
+                    tools.merge_dicts(*matching_flats)
+                )
+            else:
+                # Otherwise, just keep any of them
+                unique_flats_list.append(matching_flats[0])
+    return unique_flats_list

flatisfy/filters/metadata.py

@@ -0,0 +1,349 @@
+# coding: utf-8
+"""
+Filtering functions to handle flatisfy-specific metadata.
+
+This includes functions to guess metadata (postal codes, stations) from the
+actual fetched data.
+"""
+from __future__ import absolute_import, print_function, unicode_literals
+
+import logging
+import re
+
+from flatisfy import data
+from flatisfy import tools
+
+
+LOGGER = logging.getLogger(__name__)
+
+
+def init(flats_list):
+    """
+    Create a flatisfy key containing a dict of metadata fetched by flatisfy for
+    each flat in the list.
+
+    :param flats_list: A list of flats dict.
+    :return: The updated list
+    """
+    for flat in flats_list:
+        if "flatisfy" not in flat:
+            flat["flatisfy"] = {}
+    return flats_list
+
+
+def fuzzy_match(query, choices, limit=3, threshold=75):
+    """
+    Custom search for the best element in choices matching the query.
+
+    :param query: The string to match.
+    :param choices: The list of strings to match with.
+    :param limit: The maximum number of items to return.
+    :param threshold: The score threshold to use.
+
+    :return: Tuples of matching items and associated confidence.
+
+    .. note :: This function works by removing any fancy character from the
+    ``query`` and ``choices`` strings (replacing any non alphabetic and non
+    numeric characters by space), converting to lower case and normalizing them
+    (collapsing multiple spaces etc). It also converts any roman numerals to
+    decimal system. It then compares the string and look for the longest string
+    in ``choices`` which is a substring of ``query``. The longest one gets a
+    confidence of 100. The shorter ones get a confidence proportional to their
+    length.
+
+    .. seealso :: flatisfy.tools.normalize_string
+
+    .. todo :: Is there a better confidence measure?
+
+    :Example:
+
+        >>> match("Paris 14ème", ["Ris", "ris", "Paris 14"], limit=1)
+        [("Paris 14", 100)
+
+        >>> match( \
+                "Saint-Jacques, Denfert-Rochereau (Colonel Rol-Tanguy), " \
+                "Mouton-Duvernet", \
+                ["saint-jacques", "denfert rochereau", "duvernet", "toto"], \
+                limit=4 \
+            )
+        [('denfert rochereau', 100), ('saint-jacques', 76)]
+    """
+    normalized_query = tools.normalize_string(query)
+    normalized_choices = [tools.normalize_string(choice) for choice in choices]
+
+    # Remove duplicates in the choices list
+    unique_normalized_choices = tools.uniqify(normalized_choices)
+
+    # Get the matches (normalized strings)
+    # Keep only ``limit`` matches.
+    matches = sorted(
+        [
+            (choice, len(choice))
+            for choice in tools.uniqify(unique_normalized_choices)
+            if choice in normalized_query
+        ],
+        key=lambda x: x[1],
+        reverse=True
+    )[:limit]
+
+    # Update confidence
+    if matches:
+        max_confidence = max(match[1] for match in matches)
+        matches = [
+            (x[0], int(x[1] / max_confidence * 100))
+            for x in matches
+        ]
+
+    # Convert back matches to original strings
+    # Also filter out matches below threshold
+    matches = [
+        (choices[normalized_choices.index(x[0])], x[1])
+        for x in matches
+        if x[1] >= threshold
+    ]
+
+    return matches
+
+
+def guess_postal_code(flats_list, config, distance_threshold=20000):
+    """
+    Try to guess the postal code from the location of the flats.
+
+    :param flats_list: A list of flats dict.
+    :param config: A config dict.
+    :param distance_threshold: Maximum distance in meters between the
+    constraint postal codes (from config) and the one found by this function,
+    to avoid bad fuzzy matching. Can be ``None`` to disable thresholding.
+
+    :return: An updated list of flats dict with guessed postal code.
+    """
+    opendata = {
+        "cities": data.load_data("cities", config),
+        "postal_codes": data.load_data("postal_codes", config)
+    }
+
+    for flat in flats_list:
+        location = flat.get("location", None)
+        if not location:
+            # Skip everything if empty location
+            LOGGER.info(
+                (
+                    "No location field for flat %s, skipping postal "
+                    "code lookup."
+                ),
+                flat["id"]
+            )
+            continue
+
+        postal_code = None
+        # Try to find a postal code directly
+        try:
+            postal_code = re.search(r"[0-9]{5}", location)
+            assert postal_code is not None
+            postal_code = postal_code.group(0)
+
+            # Check the postal code is within the db
+            assert postal_code in opendata["postal_codes"]
+
+            LOGGER.info(
+                "Found postal code in location field for flat %s: %s.",
+                flat["id"], postal_code
+            )
+        except AssertionError as e:
+            postal_code = None
+
+        # If not found, try to find a city
+        if not postal_code:
+            matched_city = fuzzy_match(
+                location,
+                opendata["cities"].keys(),
+                limit=1
+            )
+            if matched_city:
+                # Store the matching postal code
+                matched_city = matched_city[0]
+                matched_city_name = matched_city[0]
+                postal_code = (
+                    opendata["cities"][matched_city_name]["postal_code"]
+                )
+                LOGGER.info(
+                    ("Found postal code in location field through city lookup "
+                     "for flat %s: %s."),
+                    flat["id"], postal_code
+                )
+
+        # Check that postal code is not too far from the ones listed in config,
+        # limit bad fuzzy matching
+        if postal_code and distance_threshold:
+            distance = min(
+                tools.distance(
+                    opendata["postal_codes"][postal_code]["gps"],
+                    opendata["postal_codes"][constraint]["gps"],
+                )
+                for constraint in config["constraints"]["postal_codes"]
+            )
+
+            if distance > distance_threshold:
+                LOGGER.info(
+                    ("Postal code %s found for flat %s is off-constraints. "
+                     "Min distance is %f."),
+                    postal_code, flat["id"], distance
+                )
+                postal_code = None
+
+        # Store it
+        if postal_code:
+            existing_postal_code = flat["flatisfy"].get("postal_code", None)
+            if existing_postal_code and existing_postal_code != postal_code:
+                LOGGER.warning(
+                    "Replacing previous postal code %s by %s for flat %s.",
+                    existing_postal_code, postal_code, flat["id"]
+                )
+            flat["flatisfy"]["postal_code"] = postal_code
+        else:
+            LOGGER.info("No postal code found for flat %s.", flat["id"])
+
+    return flats_list
+
+
+def guess_stations(flats_list, config, distance_threshold=1500):
+    """
+    Try to match the station field with a list of available stations nearby.
+
+    :param flats_list: A list of flats dict.
+    :param config: A config dict.
+    :param distance_threshold: Maximum distance (in meters) between the center
+    of the postal code and the station to consider it ok.
+
+    :return: An updated list of flats dict with guessed nearby stations.
+    """
+    opendata = {
+        "postal_codes": data.load_data("postal_codes", config),
+        "stations": data.load_data("ratp", config)
+    }
+
+    for flat in flats_list:
+        flat_station = flat.get("station", None)
+        # TODO: Use flat location field as well?
+
+        if not flat_station:
+            # Skip everything if empty station
+            LOGGER.info(
+                "No station field for flat %s, skipping stations lookup.",
+                flat["id"]
+            )
+            continue
+
+        matched_stations = fuzzy_match(
+            flat_station,
+            opendata["stations"].keys(),
+            limit=10,
+            threshold=50
+        )
+
+        # Filter out the stations that are obviously too far and not well
+        # guessed
+        good_matched_stations = []
+        postal_code = flat["flatisfy"].get("postal_code", None)
+        if postal_code:
+            # If there is a postal code, check that the matched station is
+            # closed to it
+            postal_code_gps = opendata["postal_codes"][postal_code]["gps"]
+            for station in matched_stations:
+                # opendata["stations"] is a dict mapping station names to list
+                # of coordinates, for efficiency. Note that multiple stations
+                # with the same name exist in a city, hence the list of
+                # coordinates.
+                for station_gps in opendata["stations"][station[0]]:
+                    distance = tools.distance(station_gps, postal_code_gps)
+                    if distance < distance_threshold:
+                        # If at least one of the coordinates for a given
+                        # station is close enough, that's ok and we can add
+                        # the station
+                        good_matched_stations.append({
+                            "name": station[0],
+                            "confidence": station[1],
+                            "gps": station_gps
+                        })
+                        break
+                    LOGGER.debug(
+                        "Station %s is too far from flat %s, discarding it.",
+                        station[0], flat["id"]
+                    )
+        else:
+            LOGGER.info(
+                ("No postal code for flat %s, keeping all the matched "
+                 "stations with half confidence."),
+                flat["id"]
+            )
+            # Otherwise, we keep every matching station but with half
+            # confidence
+            good_matched_stations = [
+                {
+                    "name": station[0],
+                    "confidence": station[1] * 0.5,
+                    "gps": station_gps
+                }
+                for station in matched_stations
+                for station_gps in opendata["stations"][station[0]]
+            ]
+
+        # Store matched stations and the associated confidence
+        LOGGER.info(
+            "Found stations for flat %s: %s.",
+            flat["id"],
+            ", ".join(x["name"] for x in good_matched_stations)
+        )
+        # TODO: Handle update (second pass)
+        flat["flatisfy"]["matched_stations"] = good_matched_stations
+
+    return flats_list
+
+
+def compute_travel_times(flats_list, config):
+    """
+    Compute the travel time between each flat and the points listed in the
+    constraints.
+
+    :param flats_list: A list of flats dict.
+    :param config: A config dict.
+
+    :return: An updated list of flats dict with computed travel times.
+
+    .. note :: Requires a Navitia or CityMapper API key in the config.
+    """
+    for flat in flats_list:
+        if not flat["flatisfy"].get("matched_stations", []):
+            # Skip any flat without matched stations
+            LOGGER.info(
+                "Skipping travel time computation for flat %s. No matched "
+                "stations.",
+                flat["id"]
+            )
+            continue
+
+        if "time_to" not in flat["flatisfy"]:
+            # Ensure time_to key is initialized
+            flat["flatisfy"]["time_to"] = {}
+
+        # For each place, loop over the stations close to the flat, and find
+        # the minimum travel time.
+        for place_name, place in config["constraints"]["time_to"].items():
+            time_to_place = None
+            for station in flat["flatisfy"]["matched_stations"]:
+                time_from_station = tools.get_travel_time_between(
+                    station["gps"],
+                    place["gps"],
+                    config
+                )
+                if time_from_station and (time_from_station < time_to_place or
+                                          time_to_place is None):
+                    time_to_place = time_from_station
+
+            if time_to_place:
+                LOGGER.info(
+                    "Travel time between %s and flat %s is %ds.",
+                    place_name, flat["id"], time_to_place
+                )
+                flat["flatisfy"]["time_to"][place_name] = time_to_place
+    return flats_list

flatisfy/models/flat.py

@@ -0,0 +1,101 @@
+# coding: utf-8
+"""
+This modules defines an SQLAlchemy ORM model for a flat.
+"""
+# pylint: disable=invalid-name,too-few-public-methods
+from __future__ import absolute_import, print_function, unicode_literals
+
+import enum
+
+from sqlalchemy import Column, DateTime, Enum, Float, String, Text
+
+from flatisfy.database.base import BASE
+from flatisfy.database.types import MagicJSON
+
+
+class FlatStatus(enum.Enum):
+    """
+    An enum of the possible status for a flat entry.
+    """
+    purged = -10
+    new = 0
+    contacted = 10
+    answer_no = 20
+    answer_yes = 21
+
+
+class Flat(BASE):
+    """
+    SQLAlchemy ORM model to store a flat.
+    """
+    __tablename__ = "flats"
+
+    # Weboob data
+    id = Column(String, primary_key=True)
+    area = Column(Float)
+    bedrooms = Column(Float)
+    cost = Column(Float)
+    currency = Column(String)
+    date = Column(DateTime)
+    details = Column(MagicJSON)
+    location = Column(String)
+    phone = Column(String)
+    photos = Column(MagicJSON)
+    rooms = Column(Float)
+    station = Column(String)
+    text = Column(Text)
+    title = Column(String)
+    url = Column(String)
+
+    # Flatisfy data
+    # TODO: Should be in another table with relationships
+    flatisfy_stations = Column(MagicJSON)
+    flatisfy_postal_code = Column(String)
+    flatisfy_time_to = Column(MagicJSON)
+
+    # Status
+    status = Column(Enum(FlatStatus), default=FlatStatus.new)
+
+    @staticmethod
+    def from_dict(flat_dict):
+        """
+        Create a Flat object from a flat dict as manipulated by the filtering
+        pass.
+        """
+        # Handle flatisfy metadata
+        flat_dict = flat_dict.copy()
+        flat_dict["flatisfy_stations"] = (
+            flat_dict["flatisfy"].get("matched_stations", None)
+        )
+        flat_dict["flatisfy_postal_code"] = (
+            flat_dict["flatisfy"].get("postal_code", None)
+        )
+        flat_dict["flatisfy_time_to"] = (
+            flat_dict["flatisfy"].get("time_to", None)
+        )
+        del flat_dict["flatisfy"]
+
+        # Handle date field
+        flat_dict["date"] = None  # TODO
+
+        flat_object = Flat()
+        flat_object.__dict__.update(flat_dict)
+        return flat_object
+
+    def __repr__(self):
+        return "<Flat(id=%s, url=%s)>" % (self.id, self.url)
+
+
+    def json_api_repr(self):
+        """
+        Return a dict representation of this flat object that is JSON
+        serializable.
+        """
+        flat_repr = {
+            k: v
+            for k, v in self.__dict__.items()
+            if not k.startswith("_")
+        }
+        flat_repr["status"] = str(flat_repr["status"])
+
+        return flat_repr

flatisfy/tools.py

@@ -0,0 +1,239 @@
+# coding: utf-8
+"""
+This module contains basic utility functions, such as pretty printing of JSON
+output, checking that a value is within a given interval etc.
+"""
+from __future__ import (
+    absolute_import, division, print_function, unicode_literals
+)
+
+import datetime
+import json
+import logging
+import math
+import re
+
+import requests
+import unidecode
+
+
+LOGGER = logging.getLogger(__name__)
+
+
+def pretty_json(data):
+    """
+    Pretty JSON output.
+
+    :param data: The data to dump as pretty JSON.
+    :return: The pretty printed JSON dump.
+
+    :Example:
+
+        >>> print(pretty_json({"toto": "ok", "foo": "bar"}))
+        {
+            "foo": "bar",
+            "toto": "ok"
+        }
+    """
+    return json.dumps(data, indent=4, separators=(',', ': '),
+                      sort_keys=True)
+
+
+def is_within_interval(value, min_value=None, max_value=None):
+    """
+    Check whether a variable is within a given interval. Assumes the value is
+    always ok with respect to a `None` bound. If the `value` is `None`, it is
+    always within the bounds.
+
+    :param value: The value to check. Can be ``None``.
+    :param min_value: The lower bound.
+    :param max_value: The upper bound.
+    :return: ``True`` if the value is ``None``. ``True`` or ``False`` whether
+    the value is within the given interval or not.
+
+    .. note:: A value is always within a ``None`` bound.
+
+    :Example:
+
+        >>> is_within_interval(None)
+        True
+        >>> is_within_interval(None, 0, 10)
+        True
+        >>> is_within_interval(2, None, None)
+        True
+        >>> is_within_interval(2, None, 3)
+        True
+        >>> is_within_interval(2, 1, None)
+        True
+        >>> is_within_interval(2, 1, 3)
+        True
+        >>> is_within_interval(2, 4, 7)
+        False
+        >>> is_within_interval(2, 4, 1)
+        False
+    """
+    checks = []
+    if value and min_value:
+        checks.append(value >= min_value)
+    if value and max_value:
+        checks.append(value <= max_value)
+    return all(checks)
+
+
+def normalize_string(string):
+    """
+    Normalize the given string for matching.
+
+    .. todo :: Convert romanian numerals to decimal
+
+    :Example:
+
+        >>> normalize_string("tétéà 14ème-XIV,  foobar")
+        'tetea 14eme xiv, foobar'
+    """
+    # ASCIIfy the string
+    string = unidecode.unidecode(string)
+
+    # Replace any non-alphanumeric character by space
+    # Keep some basic punctuation to keep syntaxic units
+    string = re.sub(r"[^a-zA-Z0-9,;:]", " ", string)
+
+    # Convert to lowercase
+    string = string.lower()
+
+    # Collapse multiple spaces, replace tabulations and newlines by space
+    string = re.sub(r"\s+", " ", string)
+
+    return string
+
+
+def uniqify(some_list):
+    """
+    Filter out duplicates from a given list.
+
+    :Example:
+
+        >>> uniqify([1, 2, 2, 3])
+        [1, 2, 3]
+    """
+    return list(set(some_list))
+
+
+def distance(gps1, gps2):
+    """
+    Compute the distance between two tuples of latitude and longitude.
+
+    :param gps1: First tuple of (latitude, longitude).
+    :param gps2: Second tuple of (latitude, longitude).
+    :return: The distance in meters.
+
+    :Example:
+
+        >>> int(distance([48.86786647303717, 2.19368117495212], \
+                         [48.95314107920405, 2.3368043817358464]))
+        14117
+    """
+    lat1 = math.radians(gps1[0])
+    long1 = math.radians(gps1[1])
+
+    lat2 = math.radians(gps2[0])
+    long2 = math.radians(gps2[1])
+
+    # pylint: disable=invalid-name
+    a = (
+        math.sin((lat2 - lat1) / 2.0)**2 +
+        math.cos(lat1) * math.cos(lat2) * math.sin((long2 - long1) / 2.0)**2
+    )
+    c = 2.0 * math.atan2(math.sqrt(a), math.sqrt(1 - a))
+    earth_radius = 6371000
+
+    return earth_radius * c
+
+
+def sort_list_of_dicts_by(flats_list, key):
+    """
+    Sort a list of dicts according to a given field common to all the dicts.
+
+    :param flats_list: List of dicts to sort.
+    :param key: The key of the dict items to sort on.
+    :return: A sorted list.
+
+    :Example:
+
+        >>> sort_list_of_dicts_by([{1: 2}, {1: 1}], 1)
+        [{1: 1}, {1: 2}]
+    """
+    return sorted(flats_list, key=lambda x: x[key])
+
+
+def merge_dicts(*args):
+    """
+    Merge the two flats passed as argument in a single flat dict object.
+    """
+    if len(args) == 1:
+        return args[0]
+    else:
+        flat1, flat2 = args[:2]
+        merged_flat = {}
+        for k, value2 in flat2.items():
+            value1 = flat1.get(k, None)
+            if value1 is None:
+                # flat1 has empty matching field, just keep the flat2 field
+                merged_flat[k] = value2
+            elif value2 is None:
+                # flat2 field is empty, just keep the flat1 field
+                merged_flat[k] = value1
+            else:
+                # Any other case, we should merge
+                # TODO: Do the merge
+                merged_flat[k] = value1
+        return merge_dicts(merged_flat, *args[2:])
+
+
+def get_travel_time_between(latlng_from, latlng_to, config):
+    """
+    Query the Navitia API to get the travel time between two points identified
+    by their latitude and longitude.
+
+    :param latlng_from: A tuple of (latitude, longitude) for the starting
+    point.
+    :param latlng_to: A tuple of (latitude, longitude) for the destination.
+    :return: The travel time in seconds. Returns ``None`` if it could not fetch
+    it.
+
+    .. note :: Uses the Navitia API. Requires a ``navitia_api_key`` field to be
+    filled-in in the ``config``.
+    """
+    NAVITIA_ENDPOINT = "https://api.navitia.io/v1/coverage/fr-idf/journeys"
+    time = None
+
+    # Check that Navitia API key is available
+    if config["navitia_api_key"]:
+        payload = {
+            "from": "%s;%s" % (latlng_from[1], latlng_from[0]),
+            "to": "%s;%s" % (latlng_to[1], latlng_to[0]),
+            "datetime": datetime.datetime.now().isoformat(),
+            "count": 1
+        }
+        try:
+            # Do the query to Navitia API
+            req = requests.get(
+                NAVITIA_ENDPOINT, params=payload,
+                auth=(config["navitia_api_key"], "")
+            )
+            req.raise_for_status()
+            time = req.json()["journeys"][0]["durations"]["total"]
+        except (requests.exceptions.RequestException,
+                ValueError, IndexError, KeyError) as e:
+            # Ignore any possible exception
+            LOGGER.warning(
+                "An exception occurred during travel time lookup on "
+                "Navitia: %s.",
+                str(e)
+            )
+    else:
+        LOGGER.warning(
+            "No API key available for travel time lookup. Please provide "
+            "a Navitia API key. Skipping travel time lookup."
+        )
+    return time

flatisfy/web/app.py

@@ -0,0 +1,53 @@
+# coding: utf-8
+"""
+This module contains the definition of the Bottle web app.
+"""
+from __future__ import (
+    absolute_import, division, print_function, unicode_literals
+)
+
+import os
+
+import bottle
+
+from flatisfy import database
+from flatisfy.web.routes import api as api_routes
+from flatisfy.web.dbplugin import DatabasePlugin
+
+
+def _serve_static_file(filename):
+    """
+    Helper function to serve static file.
+    """
+    return bottle.static_file(
+        filename,
+        root=os.path.join(
+            os.path.dirname(os.path.realpath(__file__)),
+            "static"
+        )
+    )
+
+
+def get_app(config):
+    """
+    Get a Bottle app instance with all the routes set-up.
+
+    :return: The built bottle app.
+    """
+    get_session = database.init_db(config["database"])
+
+    app = bottle.default_app()
+    app.install(DatabasePlugin(get_session))
+
+    # API v1 routes
+    app.route("/api/v1/", "GET", api_routes.index_v1)
+    app.route("/api/v1/flats", "GET", api_routes.flats_v1)
+    app.route("/api/v1/flat/:id", "GET", api_routes.flat_v1)
+
+    # Index
+    app.route("/", "GET", lambda: _serve_static_file("index.html"))
+
+    # Static files
+    app.route("/static/<filename:path>", "GET", _serve_static_file)
+
+    return app

flatisfy/web/dbplugin.py

@@ -0,0 +1,58 @@
+# coding: utf-8
+"""
+This module contains a Bottle plugin to pass the database argument to any route
+which needs it.
+"""
+from __future__ import (
+    absolute_import, division, print_function, unicode_literals
+)
+
+import functools
+import inspect
+
+import bottle
+
+
+class DatabasePlugin(object):
+    name = 'database'
+    api = 2
+    KEYWORD = "db"
+
+    def __init__(self, get_session):
+        """
+        :param keyword: Keyword used to inject session database in a route
+        :param create_session: SQLAlchemy session maker created with the
+                'sessionmaker' function. Will create its own if undefined.
+        """
+        self.get_session = get_session
+
+    def setup(self, app):
+        """
+        Make sure that other installed plugins don't affect the same
+        keyword argument and check if metadata is available.
+        """
+        for other in app.plugins:
+            if not isinstance(other, DatabasePlugin):
+                continue
+            else:
+                raise bottle.PluginError(
+                    "Found another conflicting Database plugin."
+                )
+
+    def apply(self, callback, route):
+        try:
+            callback_args = inspect.signature(route.callback).parameters
+        except AttributeError:
+            # inspect.signature does not exist on older Python
+            callback_args = inspect.getargspec(route.callback).args
+
+        if self.KEYWORD not in callback_args:
+            return callback
+        else:
+            with self.get_session() as session:
+                kwargs = {}
+                kwargs[self.KEYWORD] = session
+                return functools.partial(callback, **kwargs)
+
+
+Plugin = DatabasePlugin

flatisfy/web/routes/api.py

@@ -0,0 +1,47 @@
+# coding: utf-8
+"""
+This module contains the definition of the web app API routes.
+"""
+from __future__ import (
+    absolute_import, division, print_function, unicode_literals
+)
+
+from flatisfy.models import flat as flat_model
+
+
+def index_v1():
+    """
+    API v1 index route:
+
+        GET /api/v1/
+    """
+    return {
+        "flats": "/api/v1/flats"
+    }
+
+
+def flats_v1(db):
+    """
+    API v1 flats route:
+
+        GET /api/v1/flats
+    """
+    flats = [
+        flat.json_api_repr()
+        for flat in db.query(flat_model.Flat).all()
+    ]
+    return {
+        "data": flats
+    }
+
+
+def flat_v1(id, db):
+    """
+    API v1 flat route:
+
+        GET /api/v1/flat/:id
+    """
+    flat = db.query(flat_model.Flat).filter_by(id=id).first()
+    return {
+        "data": flat.json_api_repr()
+    }

flatisfy/web/static/index.html

@@ -0,0 +1,30 @@
+<!doctype html>
+<html lang="fr">
+    <head>
+        <meta charset="utf-8">
+        <title>Flatisfy</title>
+        <script src="https://unpkg.com/vue"></script>
+    </head>
+    <body>
+        <div id="app">
+            <h1>Flatisfy</h1>
+            <table>
+                <thead>