logic-helper/src/utils/record.js

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import Immutable from 'immutable';
export default class{
    constructor(){
        this.records = [];
        this.index = 0;
    }
    setData(data){
        if(this.index!=this.records.length-1){
            this.records = this.records.slice(0,this.index+1);
        }
        this.records.push(Immutable.fromJS(data));
        this.index = this.records.length-1;
    }
    getData(){
        return this.records[this.index].toJS();
    }
    prev(){
        if(this.index>0){
            this.index--;
        }
        return this.getData();
    }
    next(){
        if(this.index<this.records.length-1){
            this.index++;
        }
        return this.getData();
    }
}