module.exports = function (options) {
options = options || {};
var emitter = require('emitter'),
client = require('./client'),
backend = require('../backends/memory'),
storage = require('../storage'),
map = require('mapr').map,
socket = emitter({}),
docs;
if (options.docs) {
docs = map(options.docs, function (obj, id) {
obj._id = id;
return obj;
});
}
storage({
backend: backend({docs: docs})
}).addClient(socket);
return client({socket: socket});
};
module.exports = function (options) {
var em = emitter({}),
socket = options.socket,
/**
* Wraps function with setTimeout
*/
async = function (fn) {
return function () {
var args = arguments;
return setTimeout(function () {
fn.apply(null, args);
}, 0);
}
},
/**
* Unsubscribe an from Object / Query
*
* @param _id object or query id
* @param fn event handler
*/
unsubscribe = async(function (_id, fn) {
if (typeof _id === 'undefined') { throw new Error('_id is not defined'); }
if (fn) { em.off(_id, fn); }
socket.emit('unsub', _id);
}),
/**
* Wraps callback function
*
* @param _id object or query id
* @param fn callback
* @return function
*/
createCallback = function (_id, fn) {
return function (notification) {
_id = _id;
if (notification.doc) {
_id = notification.doc._id;
}
var handler,
isSubscribed = true,
unsub = _.once(function () {
isSubscribed = false;
unsubscribe(_id, handleNotification);
}),
handleNotification = function (notification) {
if (isSubscribed) {
if (typeof handler === 'function') {
handler(notification);
} else {
var fn = handler[notification.event];
if (fn) {
fn(notification);
}
}
}
};
if (fn) {
handler = fn(notification, unsub);
if (handler && notification.event !== 'error') {
em.on(_id, handleNotification);
}
}
if (!handler) {
unsub();
}
};
},
api = map({
/**
* Get an object
*
* @param _id
* @param fn
*/
get: function (_id, fn) {
socket.emit('get', _id, createCallback(_id, fn));
},
/**
* Update / Insert an object
*
* @param obj
* @param fn
*/
put: function (obj, fn) {
socket.emit('put', obj, createCallback(obj._id, fn));
},
/**
* Delete an object
*
* @param _id
* @param fn
*/
del: function (_id, fn) {
socket.emit('del', _id, fn);
},
/**
* Query
*
* @param query MongoDB query object
* @param callback
*/
query: function (query, callback) {
socket.emit('query', query, createCallback(getQueryId(query), callback));
}
}, async);
socket.on('notify', function (_id, notification) {
em.emit(_id, notification);
});
return api;
};
collection.find(query).toArray(function (err, docs) {
fn(err, map(docs, strId));
});