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Expresso timer
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==============
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A simple timer for extracting expressos.
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## Usage
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Just open `index.html` with your browser.
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## License
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Code published under an MIT license.
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```
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Copyright 2021 Phyks
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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:
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The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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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.
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```
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<!doctype html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>Espresso timer</title>
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<script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
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<link href="https://fonts.googleapis.com/css?family=Roboto:100,300,400,500,700,900" rel="stylesheet">
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<link href="https://cdn.jsdelivr.net/npm/@mdi/font@4.x/css/materialdesignicons.min.css" rel="stylesheet">
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<link href="https://cdn.jsdelivr.net/npm/vuetify@2.x/dist/vuetify.min.css" rel="stylesheet">
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<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no, minimal-ui">
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</head>
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<body>
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<div id="app">
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<v-app>
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<v-app-bar app>
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<v-toolbar-title>Espresso timer</v-toolbar-title>
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</v-app-bar>
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<v-main>
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<v-container>
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<h2 class="text-h6 text-center">Timer</h2>
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<v-row class="mt-8">
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<v-col cols="2" offset="2">
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<v-label>Grind level</p>
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</v-col>
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<v-col cols="6">
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<v-slider
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v-model="grindLevel"
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thumb-color="primary"
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thumb-label="always"
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@change="storeValue('grindLevel')"
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min="1"
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max="20"
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></v-slider>
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</v-col>
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</v-row>
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<v-row>
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<v-col cols="2" offset="2">
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<v-label>Pre-infusion (in s)</p>
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</v-col>
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<v-col cols="6">
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<v-slider
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v-model="preinfusionTimer"
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thumb-color="primary"
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thumb-label="always"
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:readonly="interval !== null"
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@change="storeValue('preinfusionTimer')"
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min="0"
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max="10"
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></v-slider>
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</v-col>
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</v-row>
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<v-row>
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<v-col cols="2" offset="2">
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<v-label>Total time (in s)</p>
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</v-col>
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<v-col cols="6">
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<v-slider
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v-model="totalTimer"
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thumb-color="primary"
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thumb-label="always"
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:readonly="interval !== null"
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@change="storeValue('totalTimer')"
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min="0"
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max="40"
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></v-slider>
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</v-col>
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</v-row>
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<v-row>
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<v-col cols="12" class="text-center">
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<v-btn
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class="mx-4"
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fab
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dark
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large
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color="primary"
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@click="buttonFunction"
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>
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<v-icon dark v-if="interval">
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mdi-stop
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</v-icon>
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<v-icon dark v-else-if="hasTimed">
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mdi-replay
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</v-icon>
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<v-icon dark v-else>
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mdi-play
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</v-icon>
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</v-btn>
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</v-col>
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<v-col cols="12" class="text-center" v-if="!interval && hasTimed">
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<v-simple-table class="text-center">
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<template v-slot:default>
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<thead>
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<tr>
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<th>
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Grind level
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</th>
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<th>
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Pre-infusion
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</th>
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<th>
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Total time
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</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>{{ grindLevel }}</td>
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<td>{{ initialPreinfusionTimer - preinfusionTimer }}</td>
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<td>{{ initialTotalTimer - totalTimer + extraTotalTime }}</td>
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</tr>
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</tbody>
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</template>
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</v-simple-table>
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</v-col>
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<v-col cols="12" class="text-center" v-if="!interval && hasTimed">
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<v-btn
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v-if="hasTimed"
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class="mx-4"
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fab
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dark
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large
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color="primary"
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@click="saveFunction"
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>
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<v-icon dark>
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mdi-content-save
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</v-icon>
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</v-btn>
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</v-col>
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</v-row>
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<v-divider class="my-8"></v-divider>
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<h2 class="text-h6 text-center">History</h2>
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<v-simple-table class="text-center" fixed-header v-if="history.length > 0">
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<template v-slot:default>
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<thead>
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<tr>
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<th>
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Grind level
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</th>
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<th>
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Pre-infusion
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</th>
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<th>
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Total time
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</th>
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</tr>
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</thead>
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<tbody>
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<tr v-for="point in history">
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<td>{{ point.grindLevel }}</td>
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<td>{{ point.preinfusionTime }}</td>
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<td>{{ point.totalTime }}</td>
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</tr>
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</tbody>
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</template>
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</v-simple-table>
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<p class="text-center" v-else>/</p>
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</v-container>
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</v-main>
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</v-app>
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</div>
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<script src="https://cdn.jsdelivr.net/npm/vue@2.x/dist/vue.js"></script>
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<script src="https://cdn.jsdelivr.net/npm/vuetify@2.x/dist/vuetify.js"></script>
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<script type="text/javascript">
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var ONE_SECOND = 100; // TODO
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function requestMic(handleSuccess, handleError) {
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try {
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window.AudioContext = window.AudioContext || window.webkitAudioContext;
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audioContext = new AudioContext();
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navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia;
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navigator.getUserMedia({audio: true}, handleSuccess, handleError);
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} catch (e) {
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handleError();
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}
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}
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var app = new Vue({
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el: '#app',
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vuetify: new Vuetify(),
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data: {
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//audioBeep: new Audio('audio_file.mp3'),
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//audioEnd: new Audio('audio_file.mp3'),
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hasTimed: false,
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interval: null,
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grindLevel: window.localStorage.getItem('grindLevel') || 5,
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initialPreinfusionTimer: null,
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preinfusionTimer: window.localStorage.getItem('preinfusionTimer') || 4,
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initialTotalTimer: null,
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totalTimer: window.localStorage.getItem('totalTimer') || 25,
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extraTotalTime: 0,
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history: window.localStorage.getItem('history') || [],
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},
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methods: {
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buttonFunction() {
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if (this.interval) {
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return this.stopTimer();
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}
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else if (this.hasTimed) {
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return this.resetFunction();
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}
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return this.startTimer();
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},
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resetFunction() {
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this.stopTimer();
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this.hasTimed = false;
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this.extraTotalTime = 0;
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if (this.initialPreinfusionTimer) {
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this.preinfusionTimer = this.initialPreinfusionTimer;
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}
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if (this.initialTotalTimer) {
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this.totalTimer = this.initialTotalTimer;
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}
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},
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saveFunction() {
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this.history.push({
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grindLevel: this.grindLevel,
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preinfusionTime: this.initialPreinfusionTimer - this.preinfusionTimer,
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totalTime: this.initialTotalTimer - this.totalTimer + this.extraTotalTime,
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});
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this.storeValue('history');
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this.resetFunction();
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},
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startTimer() {
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var handleSuccess = (stream) => {
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var options = {
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onVoiceStart: function() {
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console.log('voice start');
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},
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onVoiceStop: function() {
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console.log('voice stop');
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},
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onUpdate: function(val) {
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console.log('curr val:', val);
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}
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};
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// TODO: vad(audioContext, stream, options);
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};
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requestMic(
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handleSuccess,
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() => {
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console.warn('Could not connect microphone. Possibly rejected by the user or blocked by the browser.');
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console.log('Starting timer without voice detection.')
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this.hasTimed = true;
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this.initialPreinfusionTimer = this.preinfusionTimer;
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this.initialTotalTimer = this.totalTimer;
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this.interval = window.setInterval(() => {
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// TODO: this.audioBeep.play();
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if (this.preinfusionTimer > 0) {
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this.preinfusionTimer -= 1;
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} else {
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if (this.totalTimer > 0) {
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this.totalTimer -= 1;
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} else {
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if (this.totalTimer == 0) {
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// TODO: this.audioEnd.play();
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}
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this.extraTotalTime += 1;
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}
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}
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}, ONE_SECOND);
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}
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);
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},
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stopTimer() {
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console.log('Timer stopped.')
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if (this.interval) {
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window.clearInterval(this.interval);
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}
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this.interval = null;
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},
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storeValue(item) {
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window.localStorage.setItem(item, this[item]);
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},
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},
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});
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</script>
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</body>
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</html>
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