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ionic-cache-src.js
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ionic-cache-src.js
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(function() {
function extend(dst, src) {
for (var k in src)
dst[k] = dst[k] || src[k];
}
function ensureFunction(x, y) {
return typeof x == 'function' ? x : y;
};
function getBase64Image(img) {
var canvas = document.createElement("canvas");
canvas.width = img.width;
canvas.height = img.height;
var ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0);
return canvas.toDataURL();
}
// For the Default Progress Circle
//****************************************************************************************************//
var default_circle_style = {
color: '#1D5ECE',
bgcolor: '#eaeaea',
semi: false,
rounded: false,
clockwise: true,
radius: '15',
stroke: '5',
max: 100,
iterations: 50,
animation: 'easeOutCubic',
interval: 200,
showProgressCircleInBrowser: true,
showProgressCircleInDevice: true,
circleContainerStyle: 'text-align:center'
};
function getElement(element) {
switch (element[0].nodeName) {
case 'SOURCE':
return element.parent();
default:
return element;
}
}
function makeProgressCircle($scope, $compile) {
return angular.element($compile('<div style="{{circleContainerStyle}}"><div round-progress max="max" current="progress" color="{{color}}" bgcolor="{{bgcolor}}" radius="{{radius}}" stroke="{{stroke}}" rounded="rounded" clockwise="clockwise" iterations="{{iterations}}" animation="{{animation}}"></div></div>')($scope));
};
var uiOnProgress = function(scope, element, $compile, uiData) {
scope.progress = uiData.progress;
};
var uiOnStart = function(scope, element, $compile, uiData) {
// debugger;
var elm = getElement(element);
if (scope.srcIs == 'background') {
elm.css('background', scope.backgroundLoadingStyle);
} else if (element[0].nodeName != 'VIDEO' && element[0].nodeName != 'AUDIO') {
extend(scope, default_circle_style);
var progress_circle;
function addCircle() {
progress_circle = makeProgressCircle(scope, $compile);
uiData.display = elm.css('display');
elm.css('display', 'none');
elm.after(progress_circle);
};
if (window.cordova) {
if (scope.showProgressCircleInDevice) {
addCircle();
}
} else {
if (scope.showProgressCircleInBrowser) {
addCircle();
}
}
uiData.progress_circle = progress_circle;
}
};
var uiOnFinish = function(scope, element, $compile, uiData) {
if (scope.srcIs != 'background' && (element[0].nodeName != 'VIDEO' && element[0].nodeName != 'AUDIO')) {
var elm = getElement(element);
function rmCircle() {
elm.css('display', uiData.display);
uiData.progress_circle.remove();
}
if (window.cordova) {
if (scope.showProgressCircleInDevice) {
rmCircle();
}
} else {
if (scope.showProgressCircleInBrowser) {
rmCircle();
}
}
}
};
//****************************************************************************************************//
function id() {
var text = "";
var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
for (var i = 0; i < 16; i++)
text += possible.charAt(Math.floor(Math.random() * possible.length));
return text;
};
function startsWith(str, arr) {
for (var i = 0; i < arr.length; i++) {
var sub_str = arr[i];
if (str.indexOf(sub_str) === 0) {
return true;
}
}
return false;
};
function needDownload(path) {
if (startsWith(path, [
'http://',
'https://',
'ftp://'
])) {
return true;
} else {
return false;
}
};
var default_config = {
interval: 200,
backgroundStyle: '',
backgroundLoadingStyle: "url('lib/ionic-cache-src/img/loader.gif') no-repeat center",
uiOnStart: uiOnStart,
uiOnFinish: uiOnFinish,
uiOnProgress: uiOnProgress,
encodeUri: true,
expire: Infinity
};
var getCacheDir = function() {};
angular
.module('ionic-cache-src', [
'ionic',
'angular-svg-round-progress',
'ngCordova',
'ngStorage'
])
.provider('$cacheSrc', function() {
this.config = default_config;
this.set = function(obj, val) {
var t = typeof obj;
if (t == 'object') {
angular.extend(this.config, obj);
} else if (t == 'string') {
this.config[obj] = val;
}
return this;
};
this.$get = function() {
return this.config;
};
})
.factory('cacheSrcStorage', function($localStorage) {
var c = {};
c._cache = $localStorage.cache_src || {};
c.get = function(url) {
if (needDownload(url)) {
var cache_url = c._cache[url] && (getCacheDir() + c._cache[url]);
return cache_url || url;
}
return undefined;
};
c.set = function(url, localUrl) {
c._cache[url] = localUrl;
return c;
};
c.reset = function(url) {
if (url != undefined)
delete $localStorage.cache_src[url];
else
$localStorage.cache_src = {};
};
return c;
})
.directive('cacheSrc', function($ionicPlatform, $window, $interval, $timeout, $compile, $cacheSrc, $cordovaFileTransfer, $localStorage,$cordovaFile) {
return {
restrict: 'A',
priority: 99,
scope: {
'onProgress': '=?',
'onFinish': '=?',
'onError': '=?',
'onStart': '=?',
//
'uiOnStart': '=?',
'uiOnProgress': '=?',
'uiOnFinish': '=?'
},
link: function(scope, element, attrs) {
// debugger;
extend(scope, $cacheSrc);
for (var k in attrs) {
if (!angular.isFunction(scope[k])) {
scope[k] = attrs[k];
}
}
scope.expire = parseInt(scope.expire) || $cacheSrc.expire;
if (scope.encodeUri === "false")
scope.encodeUri = false;
else
scope.encodeUri = $cacheSrc.encodeUri;
// console.log("encodeURI:"+scope.encodeUri);
scope.onProgress = ensureFunction(scope.onProgress, angular.noop);
scope.onFinish = ensureFunction(scope.onFinish, angular.noop);
scope.onError = ensureFunction(scope.onError, angular.noop);
scope.onStart = ensureFunction(scope.onStart, angular.noop);
scope.uiOnProgress = ensureFunction(scope.uiOnProgress, angular.noop); //use default ones
scope.uiOnFinish = ensureFunction(scope.uiOnFinish, angular.noop);
scope.uiOnStart = ensureFunction(scope.uiOnStart, angular.noop);
function addSrcWithoutFinish(result) {
if (scope.srcIs == 'background') {
getElement(element).css('background', "url('" + result + "') " + scope.backgroundStyle);
} else {
getElement(element).attr(scope.srcIs || 'src', result);
}
}
function addSrc(result) {
addSrcWithoutFinish(result);
scope.onFinish(result);
};
if ($window.cordova) {
var getCacheDir = function() {
if (window.device)
if (window.cordova.file) {
switch (device.platform) {
case 'iOS':
return $window.cordova.file.documentsDirectory;
case 'Android':
return $window.cordova.file.dataDirectory;
case 'windows':
return $window.cordova.file.dataDirectory;
}
} else
throw new Error("window.cordova.file is not defined! Maybe you should install cordova-plugin-file first!");
else
throw new Error("window.device is not defined! Maybe you should install cordova-plugin-device first!");
return '';
};
var cache = $localStorage.cache_src = $localStorage.cache_src || {};
var create_time = $localStorage.cache_src_create_time = $localStorage.cache_src_create_time || {};
function scopeOnError(fileName,uiData) {
return function(E) {
if (E.code == 3) {
console.log('Error Occurs: ' + E.exception + "\nCode:" + E.code + "\nSrc:" + E.source);
if(uiData)
scope.uiOnFinish(scope, element, $compile, uiData);
addSrcWithoutFinish(E.source);
// var b64 = getBase64Image(getElement(element));
// if(b64.length > 200)
// $cordovaFile
// .writeFile(getCacheDir(), fileName, b64, true)
// .then(function(){
// cache[attrs.cacheSrc] = fileName;
// if (scope.expire !== Infinity) {
// create_time[attrs.cacheSrc] = Date.now();
// }
// addSrc(getCacheDir() + fileName);
// },scope.onError);
} else {
scope.onError(E);
}
};
}
function fetchRemoteWithoutLoading() {
var ext = '.' + attrs.cacheSrc.split('.').pop();
var fileName = id() + ext;
$cordovaFileTransfer
.download(attrs.cacheSrc, getCacheDir() + fileName, {
encodeURI: scope.encodeUri,
chunkedMode: false,
headers: {
Connection: "close"
}
}, true)
.then(function() {
cache[attrs.cacheSrc] = fileName;
if (scope.expire !== Infinity) {
create_time[attrs.cacheSrc] = Date.now();
}
addSrc(getCacheDir() + fileName);
}, scopeOnError(fileName), angular.noop);
}
function fetchRemote() {
var uiData = {};
scope.onStart(attrs.cacheSrc);
// var elem = getElement(element);
scope.uiOnStart(scope, element, $compile, uiData);
var ext = '.' + attrs.cacheSrc.split('.').pop();
var fileName = id() + ext;
$cordovaFileTransfer
.download(attrs.cacheSrc, getCacheDir() + fileName, {
encodeURI: scope.encodeUri,
chunkedMode: false,
headers: {
Connection: "close"
}
}, true)
.then(function() {
cache[attrs.cacheSrc] = fileName;
if (scope.expire !== Infinity) {
create_time[attrs.cacheSrc] = Date.now();
}
scope.uiOnFinish(scope, element, $compile, uiData);
addSrc(getCacheDir() + fileName);
}, scopeOnError(fileName,uiData), function(progress) {
uiData.progress = (progress.loaded / progress.total) * 100;
scope.uiOnProgress(scope, element, $compile, uiData);
scope.onProgress(uiData.progress);
});
}
function fetchCache() {
addSrc(getCacheDir() + cache[attrs.cacheSrc]);
}
$ionicPlatform
.ready(function() {
attrs.$observe('cacheSrc',
function() {
// debugger;
if (attrs.cacheSrc) {
if (needDownload(attrs.cacheSrc)) {
if (cache[attrs.cacheSrc]) {
var now = Date.now();
var create = create_time[attrs.cacheSrc] || Infinity;
if (now - create < scope.expire * 1000) {
fetchCache();
} else {
// alert('Cache expired');
addSrcWithoutFinish(getCacheDir() + cache[attrs.cacheSrc]);
fetchRemoteWithoutLoading();
}
} else {
fetchRemote();
}
} else {
addSrc(attrs.cacheSrc);
}
}
});
});
} else {
// in browser
attrs.$observe('cacheSrc', function() {
if (attrs.cacheSrc) {
if (needDownload(attrs.cacheSrc)) {
// var elem = getElement(element);
var uiData = {};
scope.onStart(attrs.cacheSrc);
scope.uiOnStart(scope, element, $compile, uiData);
element[0].onerror = scope.onError;
uiData.progress = scope.progress || 0;
// debugger;
var promise = $interval(function() {
uiData.progress += 10;
scope.uiOnProgress(scope, element, $compile, uiData);
scope.onProgress(uiData.progress);
if (uiData.progress == 100) {
$interval.cancel(promise);
scope.uiOnFinish(scope, element, $compile, uiData);
addSrc(attrs.cacheSrc);
}
}, scope.interval);
} else {
addSrc(attrs.cacheSrc);
}
}
});
}
}
};
});
}());