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channel.js
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channel.js
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var request = require('request');
var _ = require('lodash-node');
var helpers = require('./helpers.js');
var send = helpers.send;
var wss, sqlz;
var sender = { // To be used for deleted accounts
id: 0,
username: 'Guest',
picture_xs: '/images/avatar-male.jpg'
};
module.exports = {};
/**
*
* @param wss_
* @param sqlz_
*/
module.exports.initialize = function (wss_, sqlz_) {
wss = wss_;
sqlz = sqlz_;
};
/**
* Channel constructor
*
* @param channel
* @param type
* @constructor
*/
module.exports.Channel = function Channel(channel, type) {
var suffix, ids;
this.members = [];
this.channel = channel;
this.type = type || 'public';
this.settings = {};
this.invites = [];
var that = this;
// Set the user ids of the private channel for easy grabbing
if (this.type === 'private') {
suffix = channel.substr(4, channel.length);
ids = suffix.split('_');
ids[0] = parseInt(ids[0]);
ids[1] = parseInt(ids[1]);
}
getChannelInfo().then(function (query) {
console.log(query);
});
/**
* Broadcast a message to all members of the channel
*
* @param event
* @param data
* @param senderClient
*/
this.broadcast = function (event, data, senderClient) {
var length = this.members.length,
i;
if (!data.sender && senderClient) {
data.sender = {
id: senderClient.userId,
username: senderClient.username,
picture_xs: senderClient.user.picture_xs,
mod_powers: senderClient.user.mod_powers
};
}
// Don't send to self if senderClient is present
if (senderClient) {
if (senderClient.shadowbanned) {
for (i = 0; i < length; i++) {
// Don't send to the initiator of message if sender was given
if (this.members[i].userId !== senderClient.userId && this.members[i].shadowbanned) {
send(this.members[i], {
event: event,
channel: this.channel,
data: data,
userId: senderClient.userId
});
}
}
} else {
// Loop through all members
for (i = 0; i < length; i++) {
// Don't send to the initiator of message if sender was given
if (this.members[i].userId !== senderClient.userId) {
send(this.members[i], {
event: event,
channel: this.channel,
data: data,
userId: senderClient.userId
});
}
}
}
} else {
for (i = 0; i < length; i++) {
send(this.members[i], {
event: event,
channel: this.channel,
data: data
});
}
}
if (event === 'client-message' && this.type === 'private' && senderClient) {
var otherClient, otherClientId;
// Find the other user's client object
if (senderClient.userId !== ids[0]) {
otherClientId = ids[0];
otherClient = this.getMember({userId: otherClientId})
} else {
otherClientId = ids[1];
otherClient = this.getMember({userId: otherClientId})
}
// If we couldn't find the other user send request
// to php server to notify (and persist)
// that user that he received a message
if (!otherClient) {
request.post(process.env.AUTH_URL + '/api/websockets/notify', {
form: {
source_id: senderClient.userId,
user_id: otherClientId
}
});
}
}
};
/**
* Subscribe/add a WS client to channel's members array
*
* @param client
*/
this.subscribeMember = function (client) {
var subscribed = _.find(this.members, client);
if (!subscribed) {
this.members.push(client);
}
addToClientSubscribedChannelsArray(client, this);
// Notify self that subscription was successful
send(client, {
event: 'subscribed',
channel: that.channel,
members: that.getScrubbedUserObjects()
});
// Notify others that user subscribed
that.broadcast('member-added', scrubUserInfo(client.user), client);
};
/**
* Unsubscribe/remove client from channel
*
* @param client
*/
this.unsubscribeMember = function (client) {
_.remove(this.members, client);
// Notify self that subscription was successful
send(client, {
event: 'unsubscribed',
channel: this.channel
});
// Remove this channel from client's subscibed channels array
_.remove(client.subscribedChannels, {channel: this.channel});
// Send message to others in channel that user unsubscribed
this.broadcast('member-removed', client.user);
destroyChannelIfEmpty(this);
};
/**
* Get client by userId or username
*
* @param params
*/
this.getMember = function (params) {
var callback;
if (params.username) {
var username = params.username.toLowerCase();
callback = function (member) {
return member.username.toLowerCase() === username;
};
} else {
callback = function (member) {
return member.userId === params.userId;
}
}
return _.find(this.members, callback);
};
/**
* Get chatroom info
*
* @returns Promise
*/
this.getInfo = function () {
return getChannelInfo();
};
/**
*
* @returns Promise
*/
this.getInvites = function () {
return sqlz.models.invite.findAll({
where: {channel: that.channel}
});
};
/**
*
* @param client
*/
this.banMember = function (client) {
removeMemberFromChannel(client, this);
send(client, {
event: 'banned-from-channel',
channel: this.channel
});
};
/**
*
* @param client
*/
this.kickMember = function (client) {
removeMemberFromChannel(client, this);
send(client, {
event: 'kicked-from-channel',
channel: this.channel
});
};
/**
* For privacy reasons, remove fname, lname, full_name attributes
* to send to the clients to send to other connected clients.
*
* @returns {Array}
*/
this.getScrubbedUserObjects = function () {
var scrubbedUsers = [],
length = this.members.length,
i;
for (i = 0; i < length; i++) {
scrubbedUsers.push(scrubUserInfo(this.members[i].user));
}
return scrubbedUsers;
};
/**
*
* @returns Promise
*/
function getChannelInfo() {
return sqlz.models.chatroom.findOne({where: {channel: that.channel}}).then(function (query) {
try {
var chatroom = query.dataValues;
that.settings = JSON.parse(chatroom.settings);
that.owner_id = chatroom.owner_id;
} catch (e) {
//
}
that.infoLoaded = true;
if (that.type === 'protected') {
that.getInvites().then(function (query) {
for (var i = 0; i < query.length; i++) {
that.invites.push(query[i].dataValues);
}
that.invitesLoaded = true;
});
}
});
}
return this;
};
/**
* Remove some user information for privacy reasons
*
* @param user
* @returns {*}
*/
function scrubUserInfo(user) {
return {
id: user.id,
username: user.username,
picture_xs: user.picture_xs,
mod_powers: user.mod_powers,
regularTags: user.regularTags
};
}
/**
*
* @param client
* @param channel
*/
function removeMemberFromChannel(client, channel) {
var count = 0;
do {
count = _.remove(this.members, {userId: client.userId}).length;
} while (count);
// Remove this channel from client's subscibed channels array
var t = _.remove(client.subscribedChannels, {channel: channel.channel});
destroyChannelIfEmpty(channel);
}
/**
* Each client has an array which contains all subscribed channels.
* When client subscribes to a channel, add channel to array.
*
* @param client
* @param Channel
*/
function addToClientSubscribedChannelsArray(client, Channel) {
var index = client.subscribedChannels.map(function (channel) {
return channel.channel;
}).indexOf(Channel.channel);
if (index === -1) {
client.subscribedChannels.push(Channel);
}
}
/**
* If channel has no more members, remove it from wss array.
*
* @param channel
*/
function destroyChannelIfEmpty(channel) {
if (channel && (channel.members && channel.members.length === 0 || !channel.members)) {
_.remove(wss.channels, {channel: channel.channel});
}
}
/**
* Extract messages from query
*
* @param query
* @returns {Array}
*/
function extractMessages(query) {
var messages = [];
var message;
// Loop through each message
for (var i = 0; i < query.length; i++) {
message = query[i].dataValues || null;
if (message.user) {
message.sender = message.user.dataValues;
} else {
message.sender = { // To be used for deleted accounts
id: 0,
username: 'Guest',
picture_xs: '/images/avatar-male.jpg'
};
}
message.sender.mod_powers = [];
if (message.sender && message.sender.moderators) {
for (var i2 = 0; i2 < message.sender.moderators.length; i2++) {
message.sender.mod_powers.push(message.sender.moderators[i2].dataValues.channel);
}
}
if (message.photo) {
message.photo = {url: process.env.RACKSPACE_URL + message.photo.dataValues.uri};
}
delete message.sender.moderators;
delete message.user;
messages.unshift(message);
}
return messages;
}