ampache_react/app/reducers/webplayer.js

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/**
* This implements the webplayer reducers.
*/
// NPM imports
import Immutable from "immutable";
// Local imports
import { createReducer } from "../utils";
// Models
import { stateRecord } from "../models/webplayer";
// Actions
import {
PLAY_PAUSE,
STOP_PLAYBACK,
SET_PLAYLIST,
PUSH_SONG,
POP_SONG,
JUMP_TO_SONG,
PLAY_PREVIOUS_SONG,
PLAY_NEXT_SONG,
TOGGLE_RANDOM,
TOGGLE_REPEAT,
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TOGGLE_MUTE,
SET_VOLUME,
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SET_ERROR,
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INVALIDATE_STORE } from "../actions";
/**
* Initial state
*/
var initialState = new stateRecord();
/**
* Reducers
*/
export default createReducer(initialState, {
[PLAY_PAUSE]: (state, payload) => {
// Force play or pause
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return (
state
.set("isPlaying", payload.isPlaying)
.set("error", null)
);
},
[STOP_PLAYBACK]: (state) => {
// Clear the playlist
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return (
state
.set("isPlaying", false)
.set("currentIndex", 0)
.set("playlist", new Immutable.List())
.set("error", null)
);
},
[SET_PLAYLIST]: (state, payload) => {
// Set current playlist, reset playlist index
return (
state
.set("playlist", new Immutable.List(payload.playlist))
.set("currentIndex", 0)
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.set("error", null)
);
},
[PUSH_SONG]: (state, payload) => {
// Push song to playlist
let newState = state;
if (payload.index) {
// If index is specified, insert it at this position
newState = newState.set(
"playlist",
newState.get("playlist").insert(payload.index, payload.song)
);
if (payload.index <= newState.get("currentIndex")) { // "<=" because insertion is made before
// If we insert before the current position in the playlist, we
// update the current position to keep the currently played
// music
newState = newState.set(
"currentIndex",
Math.min(newState.get("currentIndex") + 1, newState.get("playlist").size)
);
}
} else {
// Else, push at the end of the playlist
newState = newState.set(
"playlist",
newState.get("playlist").push(payload.song)
);
}
return newState;
},
[POP_SONG]: (state, payload) => {
// Pop song from playlist
let newState = state.deleteIn(["playlist", payload.index]);
if (payload.index < state.get("currentIndex")) {
// If we delete before the current position in the playlist, we
// update the current position to keep the currently played
// music
newState = newState.set(
"currentIndex",
Math.max(newState.get("currentIndex") - 1, 0)
);
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} else if (payload.index == state.get("currentIndex")) {
// If we remove current song, clear the error as well
newState = newState.set("error", null);
}
return newState;
},
[JUMP_TO_SONG]: (state, payload) => {
// Set current index
const newCurrentIndex = state.get("playlist").findKey(x => x == payload.song);
return state.set("currentIndex", newCurrentIndex);
},
[PLAY_PREVIOUS_SONG]: (state) => {
const newIndex = state.get("currentIndex") - 1;
if (newIndex < 0) {
// If there is an overlow on the left of the playlist, just play
// first music again
// TODO: Should seek to beginning of music
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return state.set("error", null);
} else {
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return (
state
.set("currentIndex", newIndex)
.set("error", null)
);
}
},
[PLAY_NEXT_SONG]: (state) => {
let newIndex = state.get("currentIndex") + 1;
if (newIndex >= state.get("playlist").size) {
// If there is an overflow
if (state.get("isRepeat")) {
// If we are at the end of the playlist and repeat mode is on,
// just play back first song.
newIndex = 0;
} else {
// Just stop playback
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return (
state
.set("isPlaying", false)
.set("error", null)
);
}
} else {
// Else, play next item
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return (
state
.set("currentIndex", newIndex)
.set("error", null)
);
}
},
[TOGGLE_RANDOM]: (state) => {
return state.set("isRandom", !state.get("isRandom"));
},
[TOGGLE_REPEAT]: (state) => {
return state.set("isRepeat", !state.get("isRepeat"));
},
[TOGGLE_MUTE]: (state) => {
return state.set("isMute", !state.get("isMute"));
},
[SET_VOLUME]: (state, payload) => {
return state.set("volume", payload.volume);
},
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[SET_ERROR]: (state, payload) => {
return (
state
.set("isPlaying", false)
.set("error", payload.error)
);
},
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[INVALIDATE_STORE]: () => {
return new stateRecord();
},
});