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main.js
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main.js
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const notifier = require('node-notifier');
const path = require('path');
const ui = require('./userInterface.js');
const slack = require('./slackClient.js');
const components = ui.init(); // ui components
let users;
let currentUser;
let channels;
let currentChannelId;
const UNKNOWN_USER_NAME = 'Unknown User';
// This is a hack to make the message list scroll to the bottom whenever a message is sent.
// Multiline messages would otherwise only scroll one line per message leaving part of the message
// cut off. This assumes that messages will be less than 50 lines high in the chat window.
const SCROLL_PER_MESSAGE = 50;
// generates ids for messages
const getNextId = (() => {
let id = 0;
return () => {
id += 1;
return id;
};
})();
// handles the reply to say that a message was successfully sent
function handleSentConfirmation(message) {
// for some reason getLines gives an object with int keys
const lines = components.chatWindow.getLines();
const keys = Object.keys(lines);
let line;
let i;
for (i = keys.length - 1; i >= 0; i -= 1) {
line = lines[keys[i]].split('(pending - ');
if (parseInt(line.pop()[0], 10) === message.reply_to) {
components.chatWindow.deleteLine(parseInt(keys[i], 10));
if (message.ok) {
components.chatWindow.insertLine(i, line.join(''));
} else {
components.chatWindow.insertLine(i, `${line.join('')} (FAILED)`);
}
break;
}
}
components.chatWindow.scroll(SCROLL_PER_MESSAGE);
components.screen.render();
}
// formats channel and user mentions readably
function formatMessageMentions(text) {
if (text === null || typeof text === 'undefined') {
return '';
}
let formattedText = text;
// find user mentions
const userMentions = text.match(/<@U[a-zA-Z0-9]+>/g);
if (userMentions !== null) {
userMentions
.map(match => match.substr(2, match.length - 3))
.forEach(userId => {
let username;
let modifier;
if (userId === currentUser.id) {
username = currentUser.name;
modifier = 'yellow-fg';
} else {
const user = users.find(potentialUser => potentialUser.id === userId);
username =
typeof user === 'undefined' ? UNKNOWN_USER_NAME : user.name;
modifier = 'underline';
}
formattedText = text.replace(
new RegExp(`<@${userId}>`, 'g'),
`{${modifier}}@${username}{/${modifier}}`
);
});
}
// find special words
return formattedText.replace(
/<!channel>/g,
'{yellow-fg}@channel{/yellow-fg}'
);
}
function handleNewMessage(message) {
let username;
if (message.user === currentUser.id) {
username = currentUser.name;
} else {
const author = users.find(user => message.user === user.id);
username = (author && author.name) || UNKNOWN_USER_NAME;
notifier.notify({
icon: path.join(__dirname, 'Slack_Mark_Black_Web.png'),
message: `${username}->${message.text}`,
sound: true,
title: 'Terminal'
});
}
if (
message.channel !== currentChannelId ||
typeof message.text === 'undefined'
) {
return;
}
components.chatWindow.insertBottom(
`{bold}${username}{/bold}: ${formatMessageMentions(message.text)}`
);
components.chatWindow.scroll(SCROLL_PER_MESSAGE);
components.screen.render();
}
slack.init((data, ws) => {
currentUser = data.self;
// don't update focus until ws is connected
// focus on the channel list
components.channelList.select(0);
components.channelList.focus();
// re render screen
components.screen.render();
ws.on('message', (message /* , flags */) => {
const parsedMessage = JSON.parse(message);
if ('reply_to' in parsedMessage) {
handleSentConfirmation(parsedMessage);
} else if (parsedMessage.type === 'message') {
handleNewMessage(parsedMessage);
}
});
// initialize these event handlers here as they allow functionality
// that relies on websockets
// event handler when message is submitted
components.messageInput.on('submit', text => {
if (!text || !text.length) {
components.messageInput.focus();
return;
}
const id = getNextId();
components.messageInput.clearValue();
components.messageInput.focus();
components.chatWindow.scrollTo(
components.chatWindow.getLines().length * SCROLL_PER_MESSAGE
);
components.chatWindow.insertBottom(
`{bold}${currentUser.name}{/bold}: ${text} (pending - ${id})`
);
components.chatWindow.scroll(SCROLL_PER_MESSAGE);
components.screen.render();
ws.send(
JSON.stringify({
id,
type: 'message',
channel: currentChannelId,
text
})
);
});
// set the user list to the users returned from slack
// called here to check against currentUser
slack.getUsers((error, response, userData) => {
if (error || response.statusCode !== 200) {
console.log(
// eslint-disable-line no-console
'Error: ',
error,
response || response.statusCode
);
return;
}
const parsedUserData = JSON.parse(userData);
users = parsedUserData.members.filter(
user => !user.deleted && user.id !== currentUser.id
);
components.userList.setItems(users.map(slackUser => slackUser.name));
components.screen.render();
});
});
// set the channel list
components.channelList.setItems(['Connecting...']);
components.screen.render();
// set the channel list to the channels returned from slack
slack.getChannels((error, response, data) => {
if (error || response.statusCode !== 200) {
console.log(
// eslint-disable-line no-console
'Error: ',
error,
response && response.statusCode
);
return;
}
const channelData = JSON.parse(data);
channels = channelData.channels.filter(channel => !channel.is_archived);
components.channelList.setItems(
channels.map(slackChannel => slackChannel.name)
);
components.screen.render();
});
// event handler when user selects a channel
function updateMessages(data, markFn) {
components.chatWindow.deleteTop(); // remove loading message
// filter and map the messages before displaying them
data.messages
.filter(item => !item.hidden)
.filter(item => item.type === 'message')
// Some messages related to message threading don't have text. This feature
// isn't supported by terminal-slack right now so we filter them out
.filter(item => typeof item.text !== 'undefined')
.map(message => {
const len = users.length;
let username;
let i;
// get the author
if (message.user === currentUser.id) {
username = currentUser.name;
} else {
for (i = 0; i < len; i += 1) {
if (message.user === users[i].id) {
username = users[i].name;
break;
}
}
}
return { text: message.text, username: username || UNKNOWN_USER_NAME };
})
.forEach(message => {
// add messages to window
components.chatWindow.unshiftLine(
`{bold}${message.username}{/bold}: ${formatMessageMentions(
message.text
)}`
);
});
// mark the most recently read message
if (data.messages.length) {
markFn(currentChannelId, data.messages[0].ts);
}
// reset messageInput and give focus
components.messageInput.clearValue();
components.chatWindow.scrollTo(
components.chatWindow.getLines().length * SCROLL_PER_MESSAGE
);
components.messageInput.focus();
components.screen.render();
}
components.userList.on('select', data => {
const username = data.content;
// a channel was selected
components.mainWindowTitle.setContent(`{bold}${username}{/bold}`);
components.chatWindow.setContent('Loading...');
components.screen.render();
// get user's id
const userId = users.find(potentialUser => potentialUser.name === username)
.id;
slack.openIm(userId, (error, response, imData) => {
const parsedImData = JSON.parse(imData);
currentChannelId = parsedImData.channel.id;
// load im history
slack.getImHistory(
currentChannelId,
(histError, histResponse, imHistoryData) => {
updateMessages(JSON.parse(imHistoryData), slack.markIm);
}
);
});
});
components.channelList.on('select', data => {
const channelName = data.content;
// a channel was selected
components.mainWindowTitle.setContent(`{bold}${channelName}{/bold}`);
components.chatWindow.setContent('Loading...');
components.screen.render();
// join the selected channel
slack.joinChannel(channelName, (error, response, channelData) => {
const parsedChannelData = JSON.parse(channelData);
currentChannelId = parsedChannelData.channel.id;
// get the previous messages of the channel and display them
slack.getChannelHistory(
currentChannelId,
(histError, histResponse, channelHistoryData) => {
updateMessages(JSON.parse(channelHistoryData), slack.markChannel);
}
);
});
});