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Filename : meta.js
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'use strict';

define([
	'app',
], function (app) {
	app.factory('meta', ['storage', "lang", function(storage, lang) {

		var meta = function(storage_id) {
			if(storage_id === undefined) throw Error("No storage name provided");
			this._storage = storage.create("sort_" + storage_id);

			for(var i in this._defaults) {
				if(!this._storage.isSet(i) && this._defaults[i] !== undefined) {
					this.set(i, this._defaults[i]);
				}
			}
		};

		meta.prototype = {
			_defaults: {
				sortReverse: false,
				sortBy: '',
				sortDirection: '',
				sortFields: [],
				filterValue: '',
				maxPages: 3,
				totalItems: 0,
				currentPage: 1,
				pageSize: 15,
				pageSizes: [15, 25, 50],
				start: 0,
				limit: 15,
				itemCountText: undefined
			},
			_storage: undefined,
			_storage_key: undefined,
			_show_count_text: false,
			set: function (key, value) {
				this._storage.set(key, value);
				this._storage.save();
			},
			get: function (key, defaultValue) {
				return this._storage.get(key, defaultValue);
			},
			setSortReverse: function (sortReverse) { this.set('sortReverse', sortReverse); },
			getSortReverse: function () { return this.get('sortReverse'); },
			setSortBy: function (sortBy) { this.set('sortBy', sortBy); },
			getSortBy: function () { return this.get('sortBy'); },
			setSortDirection: function (sortDirection) { this.set('sortDirection', sortDirection); },
			getSortDirection: function () { return this.get('sortDirection'); },
			getSortDirectionInt: function() { return this.getSortDirection() === "asc" ? 1 : -1; },
			setSortFields: function (sortFields) { this.set('sortFields', sortFields); },
			getSortFields: function () { return this.get('sortFields'); },
			setFilter: function (filter) { this.set('filterValue', filter); },
			getFilter: function () { return this.get('filterValue'); },
			setMaxPages: function (maxPages) { this.set('maxPages', maxPages); },
			getMaxPages: function () { return this.get('maxPages'); },
			setTotalItems: function (totalItems) { this.set('totalItems', totalItems); },
			getTotalItems: function () { return this.get('totalItems'); },
			setCurrentPage: function (currentPage) { this.set('currentPage', currentPage); },
			getCurrentPage: function () { return this.get('currentPage'); },
			setPageSize: function (pageSize) { this.set('pageSize', pageSize); },
			getPageSize: function () { return this.get('pageSize'); },
			setPageSizes: function (pageSizes) { this.set('pageSizes', pageSizes); },
			getPageSizes: function () { return this.get('pageSizes'); },
			setStart: function (start) { this.set('start', start); },
			getStart: function () { return this.get('start'); },
			setLimit: function (limit) { this.set('limit', limit); },
			getLimit: function () { return this.get('limit'); },
			setItemCountText: function (text) { this.set('itemCountText', text); },
			getItemCountText: function () { return this.get('itemCountText'); },
			showItemCountText: function () { this._show_count_text = true; return this._show_count_text; },
			getSkip: function () { return (this.getCurrentPage() - 1) * this.getPageSize(); },
			showPagination: function () {
				return this.get('showPagination', false);
				},

			setData: function (data) { this._storage.setData(data); },
			getData: function () { return this._storage.getData(); },

			calculate: function (data) {

				if(data === undefined) data = [];
				if (this.getTotalItems() > this._min(this.getPageSizes())) {
					this.set('showPagination', true);
					var start = (this.getCurrentPage() - 1) * this.getPageSize();
					this.setStart(start + 1);
					//this.setLimit(start + data.length);

				} else {
					// hide pager and pagination
					this.set('showPagination', false);
					this.setStart((data.length === 0) ? 0 : 1);
					this.setLimit(data.length);
				}

				this.setItemCountText(lang.t("%s - %s of %s records", this.getStart(), this.getPageSize() * this.getCurrentPage() > this.getTotalItems() ? this.getTotalItems() : this.getPageSize() * this.getCurrentPage(), this.getTotalItems() ));
			},
			_min: function (ary) {
				var min = null;
				for(var i; i < ary.length; i++) if(min === null || ary[i] < min) min = ary[i];
				return min === null ? 0 : min;
			}
		};

		return { new: function (storage_id) { return new meta(storage_id); } };
	}]);
});