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channel.js
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channel.js
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import Ember from 'ember'
import DS from 'ember-data'
import firebase from 'firebase'
import {task} from 'ember-concurrency'
import {and, hash} from 'ember-awesome-macros'
import {validator, buildValidations} from 'ember-cp-validations'
import channelConst from 'radio4000/utils/channel-const'
import toggleObject from 'radio4000/utils/toggle-object'
import {findHashtags} from 'radio4000/utils/hashtag'
const {attr, hasMany, belongsTo} = DS;
const {computed, inject, get} = Ember;
const Validations = buildValidations({
title: [
validator('presence', {
presence: true,
ignoreBlank: true,
message: 'Field should not be empty'
}),
validator('length', {
min: channelConst.titleMinLength,
max: channelConst.titleMaxLength
})
],
slug: [
validator('presence', {
presence: true,
ignoreBlank: false
}),
validator('length', {
min: channelConst.titleMinLength,
max: channelConst.titleMaxLength
})
],
body: [
validator('length', {
max: channelConst.descriptionMaxLength
})
],
link: [
validator('format', {
type: 'url',
allowBlank: true,
message: 'If you leave a link, please do it with https://… in front'
})
]
});
/*
Channel model
There is no reference to the 'channel owner' because we want the user to be as anonymous as possible.
There is also a channelPublic model, which can be edited by anyone.
*/
export default DS.Model.extend(Validations, {
session: inject.service(),
flashMessages: inject.service(),
created: attr('number', {
defaultValue() {
return firebase.database.ServerValue.TIMESTAMP;
}
}),
updated: attr('timestamp'),
title: attr('string'),
slug: attr('string'),
body: attr('string'),
link: attr('string'),
isFeatured: attr('boolean'),
isPremium: attr('boolean'),
coordinatesLatitude: attr('number'),
coordinatesLongitude: attr('number'),
hasCoordinates: and('coordinatesLatitude', 'coordinatesLongitude'),
coordinates: hash({
lng: 'coordinatesLongitude',
lat: 'coordinatesLatitude'
}),
// A Cloudinary media ID. Use the "cover-img" helper to generate a full URL.
image: attr('string'),
// This property is toggled by the player setChannel.
isInPlayer: false,
// Relationships.
tracks: hasMany('track', {async: true}),
favoriteChannels: hasMany('channel', {inverse: null, async: true}),
channelPublic: belongsTo('channelPublic', {async: true}),
// Meta data.
totalFavorites: computed('favoriteChannels', function () {
return this.hasMany('favoriteChannels').ids().length;
}),
totalTracks: computed('tracks.[]', function () {
return this.hasMany('tracks').ids().length;
}),
selectedHashtags: computed('body', function () {
return findHashtags(get(this, 'body'))
}),
hasFewTracks: computed.lte('totalTracks', 2),
// can current logged in user edit the channel
canEdit: computed('id', 'session.currentUser.channels.firstObject.id', {
get() {
const channel = this;
const userChannel = get(this, 'session.currentUser.channels.firstObject');
// Avoid any property being null because `(null === null)` equals true…
if (channel === null || userChannel === null || userChannel === undefined) {
return false;
}
return channel.get('id') === userChannel.get('id');
},
set() {
// not allowed
}
}),
isExperienced: computed.and('image', 'totalTracks', 'favoriteChannels.firstObject'),
// Is already a favorite channel of session.currentUser.
isFavorite: computed('model', 'session.currentUser.channels.firstObject.favoriteChannels.[]', function () {
const channel = this;
const favorites = get(this, 'session.currentUser.channels.firstObject.favoriteChannels');
// Guard because this functions runs before userChannel is defined.
if (!favorites) {
return false;
}
// True if this channel is a favorite of the user's favorites.
return favorites.includes(channel);
}),
toggleFavorite: task(function * () {
const isFavorite = get(this, 'isFavorite');
const userChannel = get(this, 'session.currentUser.channels.firstObject');
if (!userChannel) {
get(this, 'flashMessages').warning('To save a radio channel as favorite you should sign up or log in')
return
}
// Toggle this channel on the current user's favorite channels.
const favoriteChannels = yield userChannel.get('favoriteChannels');
const channel = this;
toggleObject(favoriteChannels, channel, isFavorite);
yield userChannel.save();
// Toggle the userChannel from this channel's public followers.
const channelPublic = yield channel.get('channelPublic');
const followers = yield channelPublic.get('followers');
toggleObject(followers, userChannel, isFavorite);
yield channelPublic.save();
}).drop()
});