255 lines
9.8 KiB
JavaScript
255 lines
9.8 KiB
JavaScript
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/*! store2 - v2.7.0 - 2018-02-08
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* Copyright (c) 2018 Nathan Bubna; Licensed (MIT OR GPL-3.0) */
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;(function(window, define) {
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var _ = {
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version: "2.7.0",
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areas: {},
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apis: {},
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// utilities
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inherit: function(api, o) {
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for (var p in api) {
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if (!o.hasOwnProperty(p)) {
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o[p] = api[p];
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}
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}
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return o;
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},
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stringify: function(d) {
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return d === undefined || typeof d === "function" ? d+'' : JSON.stringify(d);
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},
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parse: function(s) {
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// if it doesn't parse, return as is
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try{ return JSON.parse(s); }catch(e){ return s; }
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},
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// extension hooks
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fn: function(name, fn) {
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_.storeAPI[name] = fn;
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for (var api in _.apis) {
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_.apis[api][name] = fn;
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}
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},
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get: function(area, key){ return area.getItem(key); },
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set: function(area, key, string){ area.setItem(key, string); },
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remove: function(area, key){ area.removeItem(key); },
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key: function(area, i){ return area.key(i); },
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length: function(area){ return area.length; },
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clear: function(area){ area.clear(); },
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// core functions
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Store: function(id, area, namespace) {
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var store = _.inherit(_.storeAPI, function(key, data, overwrite) {
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if (arguments.length === 0){ return store.getAll(); }
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if (typeof data === "function"){ return store.transact(key, data, overwrite); }// fn=data, alt=overwrite
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if (data !== undefined){ return store.set(key, data, overwrite); }
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if (typeof key === "string" || typeof key === "number"){ return store.get(key); }
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if (!key){ return store.clear(); }
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return store.setAll(key, data);// overwrite=data, data=key
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});
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store._id = id;
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try {
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var testKey = '_safariPrivate_';
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area.setItem(testKey, 'sucks');
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store._area = area;
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area.removeItem(testKey);
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} catch (e) {}
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if (!store._area) {
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store._area = _.inherit(_.storageAPI, { items: {}, name: 'fake' });
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}
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store._ns = namespace || '';
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if (!_.areas[id]) {
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_.areas[id] = store._area;
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}
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if (!_.apis[store._ns+store._id]) {
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_.apis[store._ns+store._id] = store;
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}
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return store;
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},
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storeAPI: {
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// admin functions
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area: function(id, area) {
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var store = this[id];
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if (!store || !store.area) {
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store = _.Store(id, area, this._ns);//new area-specific api in this namespace
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if (!this[id]){ this[id] = store; }
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}
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return store;
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},
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namespace: function(namespace, noSession) {
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if (!namespace){
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return this._ns ? this._ns.substring(0,this._ns.length-1) : '';
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}
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var ns = namespace, store = this[ns];
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if (!store || !store.namespace) {
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store = _.Store(this._id, this._area, this._ns+ns+'.');//new namespaced api
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if (!this[ns]){ this[ns] = store; }
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if (!noSession){ store.area('session', _.areas.session); }
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}
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return store;
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},
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isFake: function(){ return this._area.name === 'fake'; },
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toString: function() {
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return 'store'+(this._ns?'.'+this.namespace():'')+'['+this._id+']';
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},
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// storage functions
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has: function(key) {
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if (this._area.has) {
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return this._area.has(this._in(key));//extension hook
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}
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return !!(this._in(key) in this._area);
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},
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size: function(){ return this.keys().length; },
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each: function(fn, value) {// value is used by keys(fillList) and getAll(fillList))
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for (var i=0, m=_.length(this._area); i<m; i++) {
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var key = this._out(_.key(this._area, i));
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if (key !== undefined) {
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if (fn.call(this, key, value || this.get(key)) === false) {
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break;
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}
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}
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if (m > _.length(this._area)) { m--; i--; }// in case of removeItem
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}
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return value || this;
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},
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keys: function(fillList) {
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return this.each(function(k, list){ list.push(k); }, fillList || []);
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},
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get: function(key, alt) {
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var s = _.get(this._area, this._in(key));
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return s !== null ? _.parse(s) : alt || s;// support alt for easy default mgmt
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},
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getAll: function(fillObj) {
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return this.each(function(k, all){ all[k] = this.get(k); }, fillObj || {});
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},
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transact: function(key, fn, alt) {
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var val = this.get(key, alt),
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ret = fn(val);
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this.set(key, ret === undefined ? val : ret);
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return this;
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},
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set: function(key, data, overwrite) {
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var d = this.get(key);
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if (d != null && overwrite === false) {
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return data;
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}
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return _.set(this._area, this._in(key), _.stringify(data), overwrite) || d;
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},
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setAll: function(data, overwrite) {
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var changed, val;
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for (var key in data) {
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val = data[key];
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if (this.set(key, val, overwrite) !== val) {
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changed = true;
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}
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}
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return changed;
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},
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add: function(key, data) {
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var d = this.get(key);
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if (d instanceof Array) {
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data = d.concat(data);
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} else if (d !== null) {
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var type = typeof d;
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if (type === typeof data && type === 'object') {
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for (var k in data) {
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d[k] = data[k];
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}
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data = d;
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} else {
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data = d + data;
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}
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}
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_.set(this._area, this._in(key), _.stringify(data));
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return data;
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},
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remove: function(key) {
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var d = this.get(key);
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_.remove(this._area, this._in(key));
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return d;
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},
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clear: function() {
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if (!this._ns) {
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_.clear(this._area);
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} else {
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this.each(function(k){ _.remove(this._area, this._in(k)); }, 1);
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}
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return this;
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},
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clearAll: function() {
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var area = this._area;
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for (var id in _.areas) {
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if (_.areas.hasOwnProperty(id)) {
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this._area = _.areas[id];
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this.clear();
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}
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}
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this._area = area;
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return this;
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},
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// internal use functions
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_in: function(k) {
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if (typeof k !== "string"){ k = _.stringify(k); }
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return this._ns ? this._ns + k : k;
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},
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_out: function(k) {
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return this._ns ?
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k && k.indexOf(this._ns) === 0 ?
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k.substring(this._ns.length) :
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undefined : // so each() knows to skip it
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k;
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}
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},// end _.storeAPI
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storageAPI: {
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length: 0,
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has: function(k){ return this.items.hasOwnProperty(k); },
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key: function(i) {
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var c = 0;
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for (var k in this.items){
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if (this.has(k) && i === c++) {
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return k;
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}
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}
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},
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setItem: function(k, v) {
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if (!this.has(k)) {
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this.length++;
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}
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this.items[k] = v;
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},
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removeItem: function(k) {
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if (this.has(k)) {
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delete this.items[k];
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this.length--;
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}
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},
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getItem: function(k){ return this.has(k) ? this.items[k] : null; },
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clear: function(){ for (var k in this.items){ this.removeItem(k); } },
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toString: function(){ return this.length+' items in '+this.name+'Storage'; }
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}// end _.storageAPI
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};
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var store =
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// safely set this up (throws error in IE10/32bit mode for local files)
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_.Store("local", (function(){try{ return localStorage; }catch(e){}})());
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store.local = store;// for completeness
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store._ = _;// for extenders and debuggers...
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// safely setup store.session (throws exception in FF for file:/// urls)
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store.area("session", (function(){try{ return sessionStorage; }catch(e){}})());
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if (typeof define === 'function' && define.amd !== undefined) {
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define('store2', [], function () {
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return store;
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});
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} else if (typeof module !== 'undefined' && module.exports) {
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module.exports = store;
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} else {
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// expose the primary store fn to the global object and save conflicts
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if (window.store){ _.conflict = window.store; }
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window.store = store;
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}
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})(this, this.define);
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