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'use strict';
/**
* @ngdoc service
* @name angular.service.$cookies
* @requires $browser
*
* @description
* Provides read/write access to browser's cookies.
*
* Only a simple Object is exposed and by adding or removing properties to/from
* this object, new cookies are created/deleted at the end of current $eval.
*
* @example
*/
function $CookiesProvider() {
this.$get = ['$rootScope', '$browser', function ($rootScope, $browser) {
var cookies = {},
lastCookies = {},
lastBrowserCookies,
runEval = false;
//creates a poller fn that copies all cookies from the $browser to service & inits the service
$browser.addPollFn(function() {
var currentCookies = $browser.cookies();
if (lastBrowserCookies != currentCookies) { //relies on browser.cookies() impl
lastBrowserCookies = currentCookies;
copy(currentCookies, lastCookies);
copy(currentCookies, cookies);
if (runEval) $rootScope.$apply();
}
})();
runEval = true;
//at the end of each eval, push cookies
//TODO: this should happen before the "delayed" watches fire, because if some cookies are not
// strings or browser refuses to store some cookies, we update the model in the push fn.
$rootScope.$watch(push);
return cookies;
/**
* Pushes all the cookies from the service to the browser and verifies if all cookies were stored.
*/
function push() {
var name,
value,
browserCookies,
updated;
//delete any cookies deleted in $cookies
for (name in lastCookies) {
if (isUndefined(cookies[name])) {
$browser.cookies(name, undefined);
}
}
//update all cookies updated in $cookies
for(name in cookies) {
value = cookies[name];
if (!isString(value)) {
if (isDefined(lastCookies[name])) {
cookies[name] = lastCookies[name];
} else {
delete cookies[name];
}
} else if (value !== lastCookies[name]) {
$browser.cookies(name, value);
updated = true;
}
}
//verify what was actually stored
if (updated){
updated = false;
browserCookies = $browser.cookies();
for (name in cookies) {
if (cookies[name] !== browserCookies[name]) {
//delete or reset all cookies that the browser dropped from $cookies
if (isUndefined(browserCookies[name])) {
delete cookies[name];
} else {
cookies[name] = browserCookies[name];
}
updated = true;
}
}
}
}
}];
}
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