// 用来获取和设置 删除 localStorage 存储



let local = {

save(key, value) {

if (typeof value === 'string') {

localStorage.setItem(key, value);

} else {

localStorage.setItem(key, JSON.stringify(value));

}

},

fetch(key) {

return JSON.parse(localStorage.getItem(key)) || {}

},

del(key) {

if (key) {

localStorage.removeItem(key);

} else {

localStorage.clear();

}

}

}

// 用来获取和设置 删除 indexDB 存储

let myDB = {

name: "yzh_integral",

version: 1,

db: null,

ojstore: {

name: "cart", //存储空间表的名字

keypath: "id" //主键

}

};

let indexDB = {

indexedDB: window.indexedDB || window.webkitindexedDB,

IDBKeyRange: window.IDBKeyRange || window.webkitIDBKeyRange, //键范围

openDB: function (myDB, callback) {

//建立或打开数据库，建立对象存储空间(ObjectStore)

var self = this;

var version = myDB.version || 1;

var request = self.indexedDB.open(myDB.name, version);

request.onerror = function (e) {

console.log(e.currentTarget.error.message);

};

request.onsuccess = function (e) {

myDB.db = e.target.result;

console.log('成功建立并打开数据库:' + myDB.name + ' version' + version);

callback();

};

request.onupgradeneeded = function (e) {

var db = e.target.result,

transaction = e.target.transaction,

store;

if (!db.objectStoreNames.contains(myDB.ojstore.name)) {

//没有该对象空间时创建该对象空间

store = db.createObjectStore(myDB.ojstore.name, {

keyPath: myDB.ojstore.keypath

});

console.log('成功建立对象存储空间：' + myDB.ojstore.name);

}

}

},

deletedb: function (dbname) {

//删除数据库

var self = this;

self.indexedDB.deleteDatabase(dbname);

console.log(dbname + '数据库已删除')

},

closeDB: function (db) {

//关闭数据库

db.close();

console.log('数据库已关闭')

},

addData: function (db, storename, data) {

//添加数据，重复添加会报错

var self = this;

var store = store = db.transaction(storename, 'readwrite').objectStore(storename),

request;

for (var i = 0; i < data.length; i++) {

request = store.add(data[i]);

request.onerror = function () {

console.log('add添加数据库中已有该数据')

self.putData(db, storename, data);



};

request.onsuccess = function () {

console.log('add添加数据已存入数据库')

};

}

},

putData: function (db, storename, data) {

//添加数据，重复添加会更新原有数据

for (var i = 0; i < data.length; i++) {

if(data[i].id){

var modData = data[i];

this.getDataByKey(db, storename,modData.id,function(res){

res.totalCount += modData.totalCount;

var store = db.transaction(storename, 'readwrite').objectStore(storename),

request;

request = store.put(res);

request.onsuccess = function () {

console.log('put添加数据已存入数据库')

};

})

};

}

},

getAllData(db, storename,callback){

//获取所有数据

var store = db.transaction(storename, 'readwrite').objectStore(storename);

var allRecords = store.getAll();

allRecords.onsuccess = function() {

console.log(allRecords.result);

if(typeof(callback)==='function'){

callback(allRecords.result);

}

};

},

getDataByKey: function (db, storename, key,callback) {

//根据存储空间的键找到对应数据

var store = db.transaction(storename, 'readwrite').objectStore(storename);

var request = store.get(key);

request.onerror = function () {

console.log('getDataByKey error');

};

request.onsuccess = function (e) {

var result = e.target.result;

console.log('查找数据成功',result)

if(typeof(callback)==='function'){

callback(result);

}

};

},

deleteData: function (db, storename, key) {

//删除某一条记录

var store = store = db.transaction(storename, 'readwrite').objectStore(storename);

store.delete(key)

console.log('已删除存储空间' + storename + '中' + key + '记录');

},

clearData: function (db, storename) {

//删除存储空间全部记录

var store = db.transaction(storename, 'readwrite').objectStore(storename);

store.clear();

console.log('已删除存储空间' + storename + '全部记录');

}

}




//****************添加数据****************************;

// this.$indexDB.addData(myDB.db, myDB.ojstore.name, cartData);



// ****************获取所有数据****************************;

// this.$indexDB.getAllData(myDB.db, myDB.ojstore.name);



//*******************put重复添加*************************;

// this.$indexDB.putData(myDB.db,myDB.ojstore.name,cartData);



//*******************获取指定数据*************************";

// this.$indexDB.getDataByKey(

// myDB.db,

// myDB.ojstore.name,

// cartData[0].id

// );

//******************删除数据1001************;

// this.$indexDB.deleteData(myDB.db,myDB.ojstore.name,1001);



//******************删除全部数据************;

// this.$indexDB.clearData(myDB.db,myDB.ojstore.name);



//******************关闭数据库************;

// this.$indexDB.closeDB(myDB.db);



//******************删除数据库************;

// this.$indexDB.deletedb(myDB.name);

export default {

install: function (vm) {

vm.prototype.$local = local;

vm.prototype.$myDB = myDB;

vm.prototype.$indexDB = indexDB;

}

}