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/**
* Base LocalStorage cache
*
* @param options {object}
* - key (required) identifier of the collection
* - serverId (recommended) identifier of the Piwigo instance
* - serverKey (required) state of collection server-side
* - lifetime (optional) cache lifetime in seconds
* - loader (required) function called to fetch data, takes a callback as first argument
* which must be called with the loaded date
*/
var LocalStorageCache = function(options) {
this._init(options);
};
/*
* Constructor (deported for easy inheritance)
*/
LocalStorageCache.prototype._init = function(options) {
this.key = options.key + '_' + options.serverId;
this.serverKey = options.serverKey;
this.lifetime = options.lifetime ? options.lifetime*1000 : 3600*1000;
this.loader = options.loader;
this.storage = window.localStorage;
this.ready = !!this.storage;
};
/*
* Get the cache content
* @param callback {function} called with the data as first parameter
*/
LocalStorageCache.prototype.get = function(callback) {
var now = new Date().getTime(),
that = this;
if (this.ready && this.storage[this.key] != undefined) {
var cache = JSON.parse(this.storage[this.key]);
if (now - cache.timestamp <= this.lifetime && cache.key == this.serverKey) {
callback(cache.data);
return;
}
}
this.loader(function(data) {
that.set.call(that, data);
callback(data);
});
};
/*
* Manually set the cache content
* @param data {mixed}
*/
LocalStorageCache.prototype.set = function(data) {
if (this.ready) {
this.storage[this.key] = JSON.stringify({
timestamp: new Date().getTime(),
key: this.serverKey,
data: data
});
}
};
/*
* Manually clear the cache
*/
LocalStorageCache.prototype.clear = function() {
if (this.ready) {
this.storage.removeItem(this.key);
}
};
/**
* Special LocalStorage for admin categories list
*
* @param options {object}
* - serverId (recommended) identifier of the Piwigo instance
* - serverKey (required) state of collection server-side
* - rootUrl (required) used for WS call
*/
var CategoriesCache = function(options) {
options.key = 'categoriesAdminList';
options.loader = function(callback) {
jQuery.getJSON(options.rootUrl + 'ws.php?format=json&method=pwg.categories.getAdminList', function(data) {
callback(data.result.categories);
});
};
this._init(options);
};
CategoriesCache.prototype = new LocalStorageCache({});
/*
* Init Selectize with cache content
* @param $target {jQuery}
* @param options {object}
* - default (optional) default value which will be forced if the select is emptyed
* - filter (optional) function called for each select before applying the data
* takes two parameters: cache data, options
* must return new data
*/
CategoriesCache.prototype.selectize = function($target, options) {
options = options || {};
$target.selectize({
valueField: 'id',
labelField: 'fullname',
sortField: 'global_rank',
searchField: ['fullname'],
plugins: ['remove_button']
});
this.get(function(categories) {
$target.each(function() {
var data;
if (options.filter != undefined) {
data = options.filter.call(this, categories, options);
}
else {
data = categories;
}
this.selectize.load(function(callback) {
callback(data);
});
if (jQuery(this).data('value')) {
jQuery.each(jQuery(this).data('value'), jQuery.proxy(function(i, id) {
this.selectize.addItem(id);
}, this));
}
if (options.default != undefined) {
if (this.selectize.getValue() == '') {
this.selectize.addItem(options.default);
}
// if multiple: prevent item deletion
if (this.multiple) {
this.selectize.getItem(options.default).find('.remove').hide();
this.selectize.on('item_remove', function(id) {
if (id == options.default) {
this.addItem(id);
this.getItem(id).find('.remove').hide();
}
});
}
// if single: restore default on blur
else {
this.selectize.on('dropdown_close', function() {
if (this.getValue() == '') {
this.addItem(options.default);
}
});
}
}
});
});
};
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