Podcast/js/services.js
2013-01-30 08:05:18 +01:00

676 lines
26 KiB
JavaScript

'use strict';
/* Services */
angular.module('podcasts.services', ['podcasts.database'])
.service('downloader2', ['$http', '$q', 'xmlParser', function($http, $q, xmlParser) {
return {
downloadFile: function(url) {
var deferred = $q.defer();
$http.get(url, {'responseType': 'blob'})
.success(function(file) {
deferred.resolve(file);
})
.error(function() {
deferred.reject();
});
return deferred.promise;
},
downloadXml: function(url) {
var deferred = $q.defer();
$http.get(url)
.success(function(xml) {
deferred.resolve(xmlParser.parse(xml));
})
.error(function(data, status, headers, config) {
deferred.reject();
});
return deferred.promise;
}
}
}])
.service('feedItems', ['db', function(db) {
return {
db: db,
get: function(id, onSuccess, onFailure) {
this.db.getCursor("feedItem", function(ixDbCursorReq)
{
if(typeof ixDbCursorReq !== "undefined") {
ixDbCursorReq.onsuccess = function (e) {
var cursor = ixDbCursorReq.result || e.result;
if (cursor) {
onSuccess(cursor.value);
}
if (typeof onFailure === 'function') {
onFailure();
}
}
}
}, null, IDBKeyRange.only(id));
},
addFromXml: function(xml, feedId, onSuccess) {
var newFeedItem = {},
searchableXml = angular.element(xml);
newFeedItem.guid = searchableXml.find('guid').text();
newFeedItem.feedId = feedId;
newFeedItem.title = searchableXml.find('title').text();
newFeedItem.link = searchableXml.find('link').text();
newFeedItem.date = Date.parse(searchableXml.find('pubDate').text());
newFeedItem.description = searchableXml.find('description').text();
newFeedItem.audioUrl = searchableXml.find('enclosure').attr('url');
this.db.put("feedItem", newFeedItem, undefined, function() {
onSuccess(newFeedItem);
});
},
list: function($scope) {
this.db.getCursor("feedItem", function(ixDbCursorReq)
{
if(typeof ixDbCursorReq !== "undefined") {
ixDbCursorReq.onsuccess = function (e) {
var cursor = ixDbCursorReq.result || e.result;
if (cursor) {
$scope.queue.push(cursor.value);
$scope.$apply();
cursor.continue();
}
}
}
});
}
}
}])
.directive('scroll', function() {
return function(scope, element, attrs, feedItems) {
var scroll = new iScroll(element[0]);
};
})
.directive('pullToRefresh', function() {
return function(scope, element, attrs, feedItems) {
var myScroll,
pullDownEl, pullDownOffset;
pullDownEl = document.getElementById('pullDown');
pullDownOffset = pullDownEl.offsetHeight;
//TODO: get ID from context somehow?
myScroll = new iScroll(element[0], {
useTransition: true,
topOffset: pullDownOffset,
onRefresh: function () {
if (pullDownEl.className.match('loading')) {
pullDownEl.className = '';
pullDownEl.querySelector('.pullDownLabel').innerHTML = 'Pull down to refresh...';
}
},
onScrollMove: function () {
if (this.y > 5 && !pullDownEl.className.match('flip')) {
pullDownEl.className = 'flip';
pullDownEl.querySelector('.pullDownLabel').innerHTML = 'Release to refresh...';
this.minScrollY = 0;
} else if (this.y < 5 && pullDownEl.className.match('flip')) {
pullDownEl.className = '';
pullDownEl.querySelector('.pullDownLabel').innerHTML = 'Pull down to refresh...';
this.minScrollY = -pullDownOffset;
}
},
onScrollEnd: function () {
if (pullDownEl.className.match('flip')) {
pullDownEl.className = 'loading';
pullDownEl.querySelector('.pullDownLabel').innerHTML = 'Loading...';
scope.downloadItems(function(feedItem, feed) {
if (undefined === feed) {
myScroll.refresh();
} else {
pullDownEl.querySelector('.pullDownLabel').innerHTML = 'Loading ' + feed.title + '...';
}
});
}
}
});
scope.$watch(
function() { return scope.queue; },
function() { myScroll.refresh(); },
true
);
}
})
.directive('hold', function() {
return function(scope, element, attrs) {
var startTime, moved, holdTimer = false;
element.bind('touchstart', function(event) {
startTime = new Date().getTime();
clearTimeout(holdTimer);
holdTimer = setTimeout(function() {
scope.$eval(attrs.hold);
}, 500);
});
element.bind('touchmove', function() {
clearTimeout(holdTimer);
});
element.bind('touchend', function(event) {
if (new Date().getTime() - startTime > 500) {
event.preventDefault();
} else {
clearTimeout(holdTimer);
element[0].click();
}
});
}
})
.service('feeds', ['db', 'downloader2', 'xmlParser', 'feedItems', function(db, downloader2, xmlParser, feedItems) {
return {
db: db,
feeds: [],
add: function(url) {
var feedService = this;
var finishSave = function(newFeed) {
db.put("feed", newFeed, undefined, function(key) {
newFeed.id = key;
feedService.feeds.push(newFeed);
feedService.downloadItems(newFeed);
});
};
// TODO: verify URL format somewhere
var promise = downloader2.downloadXml(url);
promise.then(function(xml) {
var channelChildren = xml.find('channel').children(),
newFeed = {},
imageUrl;
angular.forEach(channelChildren, function(value, key) {
if ('itunes:image' === angular.element(value)[0].nodeName.toLowerCase()) {
imageUrl = angular.element(value).attr('href');
}
if ('itunes:author' === angular.element(value)[0].nodeName.toLowerCase()) {
newFeed.author = angular.element(value).text();
}
});
newFeed.url = url;
newFeed.title = channelChildren.find('title').text();
newFeed.summary = channelChildren.find('description').text();
var file = downloader2.downloadFile(imageUrl);
file.then(function(fileBlob) {
newFeed.image = fileBlob;
finishSave(newFeed);
}, function() {
finishSave(newFeed);
});
}, function() {
console.log('Could not fetch XML for feed, adding just URL for now');
var newFeed = {};
newFeed.url = url;
finishSave(newFeed);
});
},
get: function(id, onSuccess, onFailure) {
id = parseInt(id, 10);
this.db.getCursor("feed", function(ixDbCursorReq)
{
if(typeof ixDbCursorReq !== "undefined") {
ixDbCursorReq.onsuccess = function (e) {
var cursor = ixDbCursorReq.result || e.result;
if (cursor) {
var feed = cursor.value;
if (typeof feed.image === 'string') {
feed.image = new Blob([feed.image]);
}
db.getCursor("feedItem", function(ixDbCursorReq)
{
feed.items = [];
if(typeof ixDbCursorReq !== "undefined") {
ixDbCursorReq.onsuccess = function (e) {
var cursor = ixDbCursorReq.result || e.result;
if (cursor) {
feed.items.push(cursor.value);
cursor.continue();
} else {
onSuccess(feed);
}
}
}
}, null, IDBKeyRange.only(feed.id), undefined, 'ixFeedId');
//onSuccess(cursor.value);
} else {
onFailure(cursor);
}
}
ixDbCursorReq.onerror = function (e) {
onFailure(e);
}
}
}, undefined, IDBKeyRange.only(id));
},
list: function($scope) {
var feeds = this.feeds;
db.getCursor("feed", function(ixDbCursorReq)
{
if(typeof ixDbCursorReq !== "undefined") {
ixDbCursorReq.onsuccess = function (e) {
var cursor = ixDbCursorReq.result || e.result;
if (cursor) {
if (typeof cursor.value.image === 'string') {
cursor.value.image = new Blob([cursor.value.image], {type: 'application/octet-stream'});
}
feeds.push(cursor.value);
$scope.$apply();
cursor.continue();
}
}
}
});
},
/**
*
* @param feedItems
* @param updateStatus function that gets called for each item it goes through
* Takes the feedItem as the argument
*/
downloadAllItems: function(feedItems, updateStatus) {
var feedService = this;
db.getCursor("feed", function(ixDbCursorReq)
{
if(typeof ixDbCursorReq !== "undefined") {
ixDbCursorReq.onsuccess = function (e) {
var cursor = ixDbCursorReq.result || e.result;
if (cursor) {
feedService.downloadItems(cursor.value, updateStatus);
cursor.continue();
} else {
updateStatus();
}
}
}
});
},
downloadItems: function(feedItem, updateStatus) {
var promise = downloader2.downloadXml(feedItem.url);
promise.then(function(data) {
angular.forEach(
data.find('item'),
function(element, index) {
if (index < 3) { // TODO: this should be a global setting
feedItems.addFromXml(element, feedItem.id, function(item) {
if (typeof updateStatus === 'function') {
updateStatus(item, feedItem);
}
});
}
}
);
});
}
}
}])
.value('xmlParser', {
parse: function(data) {
return angular.element(new window.DOMParser().parseFromString(data, "text/xml"));
}
})
.directive('blob', function() {
return function postLink(scope, element, attrs) {
var updateImage = function () {
var blob = scope.$eval(attrs.blob);
if (blob !== undefined) {
var imgUrl = window.URL.createObjectURL(blob);
element.attr('src', imgUrl);
window.URL.revokeObjectURL(imgUrl);
}
};
scope.$watch(
function() { return scope.$eval(attrs.blob); },
function() { updateImage(); },
true
);
};
})
.directive('setting', function() {
return {
restrict: 'A',
require: '?ngModel',
priority: 1,
link: function(scope, element, attrs, ngModel) {
if (!ngModel) {
return;
}
ngModel.$render = function() {
console.log(ngModel);
if (ngModel.$modelValue.value !== '') {
ngModel.$viewValue = ngModel.$modelValue.value;
}
};
}
};
})
.service('settings', ['db', function(db) {
return {
db: db,
set: function (name, value, key) {
if (key) {
var setting = {'id': key, 'name': name, 'value': value};
} else {
var setting = {'name': name, 'value': value};
}
this.db.put("setting", setting);
},
get: function (name, onSuccess, onFailure) {
this.db.getCursor("setting", function(ixDbCursorReq)
{
if(typeof ixDbCursorReq !== "undefined") {
ixDbCursorReq.onsuccess = function (e) {
var cursor = ixDbCursorReq.result || e.result;
if (cursor) {
onSuccess(cursor.value);
} else {
onFailure();
}
}
ixDbCursorReq.onerror = function (e) {
onFailure();
}
}
}, undefined, IDBKeyRange.only(name), undefined, 'ixName');
},
setAllValuesInScope: function(scope) {
this.db.getCursor("setting", function(ixDbCursorReq)
{
if(typeof ixDbCursorReq !== "undefined") {
ixDbCursorReq.onsuccess = function (e) {
var cursor = ixDbCursorReq.result || e.result;
if (cursor) {
scope[cursor.value.name] = cursor.value;
scope.$apply();
cursor.continue();
}
}
}
});
}
}
}])
.service('player', ['db', function(db) {
return {
db: db,
audio: angular.element(document.getElementById('audioPlayer')),
nowPlaying: {position: 0, duration: 0, title: '', description: '', feed: '', date: 0},
play: function (feedItem, $scope) {
if (feedItem) {
var audioSrc;
if (feedItem.audio) {
var URL = window.URL || window.webkitURL;
audioSrc = URL.createObjectURL(feedItem.audio);
} else {
audioSrc = feedItem.audioUrl;
}
this.audio.attr('src', audioSrc);
this.updateSong(feedItem, $scope);
if (feedItem.position) {
this.audio.bind('canplay', function(event) {
this.currentTime = feedItem.position;
});
}
}
this.audio[0].play();
var db = this.db;
this.audio.bind('pause', function(event) {
feedItem.position = Math.floor(event.target.currentTime);
db.put("feedItem", feedItem);
});
},
pause: function() {
this.audio[0].pause();
},
playing: function() {
return !this.audio[0].paused;
},
updateSong: function(feedItem, $scope) {
this.nowPlaying.title = feedItem.title;
var audio = this.audio[0],
player = this;
setTimeout(function() {
player.nowPlaying.duration = audio.duration;
}, 100);
this.nowPlaying.feedItem = feedItem;
this.nowPlaying.description = feedItem.description;
this.nowPlaying.feed = feedItem.feed;
this.nowPlaying.date = feedItem.date;
this.updatePosition($scope);
},
updatePosition: function($scope) {
var audio = this.audio[0],
player = this;
setInterval(function() {
player.nowPlaying.position = audio.currentTime;
$scope.$apply();
}, 1000);
}
}
}])
.service('pageSwitcher', ['$location', '$route', function($location, $route) {
return {
//TODO: change these getElementById's to something else
pageSwitcher: document.getElementById('pageSwitcher'),
pages: ['queue', 'settings', 'feeds'],
$route: $route,
currentPage: null,
backPage: null,
change: function(current) {
this.currentPage = current;
var nextPage = this.getNextPage(this.currentPage);
angular.element(document.getElementById('pageswitch-icon-' + this.currentPage))
.addClass('next').removeClass('next1 next2');
angular.element(document.getElementById('pageswitch-icon-' + nextPage))
.addClass('next1').removeClass('next next2');
angular.element(document.getElementById('pageswitch-icon-' + this.getNextPage(nextPage)))
.addClass('next2').removeClass('next next1');
},
setBack: function(backPage) {
this.backPage = backPage;
console.log(this);
},
getNextPage: function(current) {
var nextPage,
pages = this.pages,
validRoute = false;
angular.forEach(pages, function(value, key) {
if (current === value) {
var nextKey = key + 1;
if (pages[nextKey]) {
nextPage = pages[nextKey];
} else {
nextPage = pages[0];
}
}
});
angular.forEach(this.$route.routes, function(value, key) {
if (key === '/' + nextPage) {
validRoute = true;
}
});
if (!validRoute) {
console.error('no valid route found for pageSwitcher: ' + nextPage);
}
return nextPage;
},
goToPage: function(page) {
if (!page) {
if (this.backPage) {
page = this.backPage;
} else {
page = this.getNextPage(this.currentPage);
}
}
if (this.backPage) {
this.backPage = null;
}
$location.path('/'+page);
}
}
}])
.service('downloader', ['db', '$http', 'settings', function(db, $http, settings) {
return {
db: db,
http: $http,
settings: settings,
allowedToDownload: function(result) {
settings.get('downloadOnWifi', function(setting) {
if (setting.value) {
// check if we're on wifi
result(false);
} else {
result(true);
}
}, function() {
result(true); // Default value is "allowed" - maybe change this?
});
},
downloadAll: function() {
var downloader = this;
this.allowedToDownload(function(value) {
if (!value) {
alert('not Downloading because not on WiFi');
} else {
var itemsToDownload = [];
downloader.db.getCursor("feedItem", function(ixDbCursorReq)
{
if(typeof ixDbCursorReq !== "undefined") {
ixDbCursorReq.onsuccess = function (e) {
var cursor = ixDbCursorReq.result || e.result;
if (cursor) {
if (!cursor.value.audio && cursor.value.audioUrl) {
itemsToDownload.push(cursor.value);
}
cursor.continue();
} else {
downloader.downloadFiles(itemsToDownload);
}
}
}
});
}
});
},
downloadFiles: function(itemsToDownload) {
var item = itemsToDownload.shift(),
downloader = this;
if (!item) {
return;
}
this.http.get(item.audioUrl, {'responseType': 'blob'}).success(function(data) {
item.audio = data;
db.put("feedItem", item);
downloader.downloadFiles(itemsToDownload);
});
}
};
}])
.filter('time', function() {
return function(input, skip) {
var seconds, minutes, hours;
seconds = Math.floor(input);
if (seconds > 120) {
minutes = Math.floor(seconds/60);
seconds = seconds % 60;
}
if (minutes > 60) {
minutes = Math.floor(minutes/60);
hours = minutes % 60;
}
if (hours) {
return hours + ':' + minutes + ':' + seconds;
} else if (minutes) {
return minutes + ':' + seconds;
} else {
if (skip) {
return seconds;
}
return seconds + 's';
}
}
})
.filter('timeAgo', function() {
return function(timestamp) {
var diff = ((new Date().getTime()) - (new Date(timestamp).getTime())) / 1000,
day_diff = Math.floor(diff / 86400);
return day_diff == 0 && (
diff < 60 && "just now" ||
diff < 120 && "1 minute ago" ||
diff < 3600 && Math.floor( diff / 60 ) + " minutes ago" ||
diff < 7200 && "1 hour ago" ||
diff < 86400 && Math.floor( diff / 3600 ) + " hours ago") ||
day_diff == 1 && "Yesterday" ||
day_diff < 7 && day_diff + " days ago" ||
day_diff < 31 && Math.ceil( day_diff / 7 ) + " weeks ago" ||
"older than a month";
}
});
angular.module('podcasts.database', []).
run(function() {
var dbConfig = (function () {
//Create IndexedDB ObjectStore and Indexes via ixDbEz
ixDbEz.createObjStore("feed", "id", true);
ixDbEz.createIndex("feed", "ixUrl", "url", true);
ixDbEz.createObjStore("feedItem", "id", true);
ixDbEz.createIndex("feedItem", "ixGuid", "guid", true);
ixDbEz.createIndex("feedItem", "ixFeedId", "feedId");
ixDbEz.createObjStore("setting", "id", true);
ixDbEz.createIndex("setting", "ixName", "name", true);
});
//Create or Open the local IndexedDB database via ixDbEz
ixDbEz.startDB("podcastDb", 7, dbConfig, undefined, undefined, false);
})
.value('db', ixDbEz);
angular.module('podcasts.updater', []).
run(function($timeout) {
var checkFeeds = function() {
console.log('TODO: trigger download here');
$timeout(checkFeeds, 1800000); // run every half an hour
};
checkFeeds();
});