Files
desktop-app/node_modules/nedb_proxy.js
2016-05-22 15:15:27 +08:00

96 lines
2.5 KiB
JavaScript

var ipc = require('electron').ipcRenderer;
function Find(dbProxy, dbname, query) {
this.query = query;
this.dbProxy = dbProxy;
this.dbname = dbname;
}
Find.prototype.sort = function (sorter) {
this.sorter = sorter;
return this;
}
Find.prototype.exec = function (callback) {
var params = {
query: this.query,
sorter: this.sorter
};
this.dbProxy.send(params, callback, 'find');
};
//==========
function DBProxy(dbname) {
this.dbname = dbname;
};
var token = 1;
var token2Callback = {};
DBProxy.prototype.send = function(params, callback, method) {
token++;
var m = {
token: token,
method: method,
dbname: this.dbname,
// 转为json字符串, 如果{[a], [a]}, 在main接收后变成了 {[a], [null]}, 对象引用问题
params: params ? JSON.stringify(params) : ''
}
token2Callback[token] = callback;
ipc.send('db-exec', m);
};
// NB.find({UserId: userId, $or: [{LocalIsDelete : { $exists : false }}, {LocalIsDelete: false}] }, function(err, notebooks) {
// Notes.find(query).sort({'UpdatedTime': -1}).exec(function(err, notes) {
DBProxy.prototype.find = function (params, callback) {
if (callback) {
// console.log('client');
// console.log(params);
this.send({query: params}, callback, 'find');
}
else {
return new Find(this, this.dbname, params);
}
};
DBProxy.prototype.findOne = function (params, callback) {
this.send(params, callback, 'findOne');
};
DBProxy.prototype.count = function (params, callback) {
this.send(params, callback, 'count');
};
DBProxy.prototype.insert = function (params, callback) {
this.send(params, callback, 'insert');
};
DBProxy.prototype.update = function (query, sets, options, callback) {
if (typeof options == 'function') {
callback = options;
options = {};
}
if (!options) {
options = {};
}
var params = {
query: query,
sets: sets,
options: options
};
this.send(params, callback, 'update');
};
DBProxy.prototype.remove = function (params, callback) {
this.send(params, callback, 'remove');
};
// m = {token: , err : , ret: }
ipc.on('db-exec-ret', function(event, m) {
var token = m.token;
var callback = token2Callback[token];
// console.log('clent 接收到消息');
// console.log(m);
// console.log('--------------');
if(m.ret && typeof m.ret == 'string') {
m.ret = JSON.parse(m.ret);
}
callback && callback(m.err, m.ret);
});
module.exports = DBProxy;