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use localStorage for snippets cache #25

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use localStorage for snippets cache #25

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32 changes: 29 additions & 3 deletions client-side/history.ajax.js
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Original file line number Diff line number Diff line change
Expand Up @@ -24,14 +24,40 @@ var handleState = function (context, name, args) {
handler.apply(context, args);
}
};
/**
* Either save snippets to localStorage & return key or return snippets for fallbacks.
* @param {String} hashKey
* @returns {Array|String}
*/
var saveSnippets = function(hashKey) {
var snippets = findSnippets();
if (window.localStorage) {
localStorage.setItem(hashKey, JSON.stringify(snippets));
return hashKey;
} else {
return snippets;
}
};
/**
* Load array of snippet objects.
* @param {String} snippetsOrHash
* @returns {Array}
*/
var loadSnippets = function(snippetsOrHash) {
if (window.localStorage) {
return JSON.parse(localStorage.getItem(snippetsOrHash));
} else {
return snippetsOrHash;
}
};

$.nette.ext('history', {
init: function () {
var snippetsExt;
if (this.cache && (snippetsExt = $.nette.ext('snippets'))) {
this.handleUI = function (domCache) {
var snippets = {};
$.each(domCache, function () {
$.each(loadSnippets(domCache), function () {
snippets[this.id] = this.html;
});
snippetsExt.updateSnippets(snippets, true);
Expand Down Expand Up @@ -64,7 +90,7 @@ $.nette.ext('history', {
nette: true,
href: window.location.href,
title: document.title,
ui: this.cache ? findSnippets() : null
ui: this.cache ? saveSnippets(window.location.href) : null
}, document.title, window.location.href);
},
before: function (xhr, settings) {
Expand Down Expand Up @@ -93,7 +119,7 @@ $.nette.ext('history', {
nette: true,
href: this.href,
title: document.title,
ui: this.cache ? findSnippets() : null
ui: this.cache ? saveSnippets(this.href) : null
}, document.title, this.href);
}
this.href = null;
Expand Down