vn-native-local-cloud/core.ts

local cloud library for vn native

export class LocalCloud {
    public dataKey;
    constructor(){
        this.dataKey = "@vn-native-data-key";
    }
    /**
     * 
     * @param {*} key => key of data 
     * @param {*} value => vvalue of data , only string
     */
    setItem(key,value){
        return new Promise((resolve,reject) => {
            this.add_key_to_data_key(key).then((data) => {
                localStorage.setItem(key,value);
                return resolve("Set new data successfully")
            }).catch((err) => {
                return reject("set new data filed, please try again");
            });
        });
    }
    /**
     * 
     * @param {*} key => key of data 
     */
    getItem(key){
        return new Promise((resolve,reject) => {
            let data = localStorage.getItem(key);
            if(data) {
                return resolve(data);
            }
            return reject("key is not exists");
        });
    }
    /**
     * 
     * @param {*} key => key of data 
     */
    removeItem(keyRemove){
        let listKey = localStorage.getItem(this.dataKey);
        if(listKey == '') {
            localStorage.removeItem(keyRemove);
        } else {
            let newList = [];
            let dataLocal = JSON.parse(listKey);
            let i =0;
            dataLocal.forEach(element => {
                if(element != keyRemove) {
                    newList[i++] = element;
                } 
            });
            localStorage.removeItem(this.dataKey);
            localStorage.removeItem(keyRemove);
            localStorage.setItem(this.dataKey,JSON.stringify(newList));
        }
    }
    /**
     * return all key use on cloud
     */
    getAllData(){
        return new Promise((resolve,reject) => {
            return resolve(localStorage.getItem(this.dataKey));
        });
    }
    /**
     * Add key to cloud for manager data
     */
    add_key_to_data_key(key){
        return new Promise((resolve,reject) => {
            let list = localStorage.getItem(this.dataKey);
            if(list != '' && list ) {
                let dataSet = JSON.parse(list);
                dataSet = dataSet.concat(key);
                return resolve(dataSet);
            } else {
                let dataSet = [key];
                let _dataSet = JSON.stringify(dataSet);
                localStorage.setItem(this.dataKey,_dataSet);
                return resolve(dataSet);
            }
        })
    }
}