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89 lines
2.2 KiB
89 lines
2.2 KiB
4 years ago
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module.exports = ProtoList
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function setProto(obj, proto) {
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if (typeof Object.setPrototypeOf === "function")
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return Object.setPrototypeOf(obj, proto)
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else
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obj.__proto__ = proto
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}
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function ProtoList () {
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this.list = []
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var root = null
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Object.defineProperty(this, 'root', {
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get: function () { return root },
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set: function (r) {
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root = r
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if (this.list.length) {
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setProto(this.list[this.list.length - 1], r)
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}
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},
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enumerable: true,
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configurable: true
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})
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}
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ProtoList.prototype =
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{ get length () { return this.list.length }
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, get keys () {
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var k = []
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for (var i in this.list[0]) k.push(i)
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return k
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}
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, get snapshot () {
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var o = {}
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this.keys.forEach(function (k) { o[k] = this.get(k) }, this)
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return o
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}
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, get store () {
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return this.list[0]
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}
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, push : function (obj) {
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if (typeof obj !== "object") obj = {valueOf:obj}
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if (this.list.length >= 1) {
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setProto(this.list[this.list.length - 1], obj)
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}
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setProto(obj, this.root)
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return this.list.push(obj)
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}
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, pop : function () {
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if (this.list.length >= 2) {
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setProto(this.list[this.list.length - 2], this.root)
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}
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return this.list.pop()
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}
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, unshift : function (obj) {
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setProto(obj, this.list[0] || this.root)
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return this.list.unshift(obj)
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}
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, shift : function () {
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if (this.list.length === 1) {
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setProto(this.list[0], this.root)
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}
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return this.list.shift()
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}
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, get : function (key) {
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return this.list[0][key]
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}
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, set : function (key, val, save) {
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if (!this.length) this.push({})
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if (save && this.list[0].hasOwnProperty(key)) this.push({})
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return this.list[0][key] = val
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}
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, forEach : function (fn, thisp) {
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for (var key in this.list[0]) fn.call(thisp, key, this.list[0][key])
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}
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, slice : function () {
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return this.list.slice.apply(this.list, arguments)
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}
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, splice : function () {
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// handle injections
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var ret = this.list.splice.apply(this.list, arguments)
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for (var i = 0, l = this.list.length; i < l; i++) {
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setProto(this.list[i], this.list[i + 1] || this.root)
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}
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return ret
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}
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}
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