angularjs操作indexeddb

angularjs操作indexeddb

angular.module('app')
.service('DBUtil', function ($http,$q) {
    var _self = this;
    var myDB = {
        name : 'db',
        version : 1 ,
        db : null
    };

    _self.openDB = function (name, version, stores) {
        var d = $q.defer();

        var name = version || myDB.name;
        var version = version || myDB.version;
        //打開數據庫
        var result = window.indexedDB.open(name,version);
        //錯誤
        result.onerror = function(e){
            console.log("Open DB Error!");
            d.reject("error");
        };
        //正確打開
        result.onsuccess = function(e){
            myDB.db = e.target.result ;
            d.resolve("success");
        };
        //數據庫版本變更
        result.onupgradeneeded = function(e){
            myDB.db = e.target.result ;
            if(!myDB.db.objectStoreNames.contains('users')){
                myDB.db.createObjectStore('users',{keyPath: "id"});
            }
            if(!myDB.db.objectStoreNames.contains('infos')){
                myDB.db.createObjectStore('infos',{autoIncrement: true});
            }
            d.resolve("upgradeneeded");
        };
        return d.promise;
    };
    _self.get = function (db,storeName,key) {
        var d = $q.defer();//promise

        db = db || myDB.db;//check db whether input
        var transaction = db.transaction(storeName,'readonly');
        var store = transaction.objectStore(storeName);
        var result = store.get(key);
        result.onsuccess = function (e) {
            _self.result = e.target.result;
            d.resolve();
        };
        result.onerror = function (e) {
            d.reject();
        };
        return d.promise;
    };
    _self.put = function (db,storeName,value) {
        db = db || myDB.db;
        var transaction = db.transaction(storeName,'readwrite');
        var store = transaction.objectStore(storeName);
        if(value !== null && value !== undefined){
            store.put(value);
        }
    };
    _self.remove = function (db,storeName,value) {
        db = db || myDB.db;
        var transaction = db.transaction(storeName,'readwrite');
        var store = transaction.objectStore(storeName);
        var result = store.delete(value);
        result.onsuccess = function (e) {
            console.log(e);
        };
        result.onerror = function (e) {
            console.log(e);
        };
    };
    return _self;
});