import common from './common.js'

class IndexedCollection {
    constructor() {
        this.list = []
        this.index = {}
        Object.defineProperty(this, 'length', {
            get: function () {
                return this.list.length
            },
        })

        if (typeof this.getIndex != 'function') {
            throw new Error('IndexedCollection.getIndex not implemented in subclass.')
        }
    }
    forEach(e) {
        this.list.forEach(e)
    }
    add(pano) {
        this.list.push(pano)
        this.index[this.getIndex(pano)] = pano
    }
    extend(e) {
        for (var t = 0; t < e.length; t++) this.add(e[t])
    }
    get(panoId) {
        return this.index[panoId]
    }
    first() {
        return this.list[0]
    }
    last() {
        return this.list[this.list.length - 1]
    }
    reIndex() {
        this.index = {}
        var e = this
        this.forEach(function (t) {
            e.index[e.getIndex(t)] = t
        })
    }
    filter(e) {
        var t = this.list.filter(e)
        return this.reIndex(), t
    }
    reduce(e, t) {
        return this.list.reduce(e, t)
    }
    sort(e) {
        return this.list.sort(e)
    }
    indexOf(e) {
        for (var t = 0; t < this.list.length; ++t) if (this.list[t] === e) return t
        return -1
    }

    clone() {
        //xzw add
        var newobj = new this.constructor()
        newobj.extend(this.list)
        return newobj
    }
}

export default IndexedCollection