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Laurentttrade/_message.html.erb

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Created February 2, 2016 15:59
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Tutorial code snippets for chat application in rails. Tutorial link http://goo.gl/l3e8zN
Raw
chat.js
/**
* Chat logic
*
* Most of the js functionality is inspired from anatgarg.com
* jQuery tag Module from the tutorial
* http://anantgarg.com/2009/05/13/gmail-facebook-style-jquery-chat/
*
*/
var chatboxFocus = new Array();
var chatBoxes = new Array();
var ready = function () {
chatBox = {
/**
* creates an inline chatbox on the page by calling the
* createChatBox function passing along the unique conversation_id
*
* @param conversation_id
*/
chatWith: function (conversation_id) {
chatBox.createChatBox(conversation_id);
$("#chatbox_" + conversation_id + " .chatboxtextarea").focus();
},
/**
* closes the chatbox by essentially hiding it from the page
*
* @param conversation_id
*/
close: function (conversation_id) {
$('#chatbox_' + conversation_id).css('display', 'none');
chatBox.restructure();
},
/**
* Plays a notification sound when a new chat message arrives
*/
notify: function () {
var audioplayer = $('#chatAudio')[0];
audioplayer.play();
},
/**
* Handles 'smart layouts' of the chatboxes. Like when new chatboxes are
* added or removed from the view, it restructures them so that they appear
* neatly aligned on the page
*/
restructure: function () {
align = 0;
for (x in chatBoxes) {
chatbox_id = chatBoxes[x];
if ($("#chatbox_" + chatbox_id).css('display') != 'none') {
if (align == 0) {
$("#chatbox_" + chatbox_id).css('right', '20px');
} else {
width = (align) * (280 + 7) + 20;
$("#chatbox_" + chatbox_id).css('right', width + 'px');
}
align++;
}
}
},
/**
* Takes in two parameters. It is responsible for fetching the specific conversation's
* html page and appending it to the body of our home page e.g if conversation_id = 1
*
* $.get("conversations/1, function(data){
* // rest of the logic here
* }, "html")
*
* @param conversation_id
* @param minimizeChatBox
*/
createChatBox: function (conversation_id, minimizeChatBox) {
if ($("#chatbox_" + conversation_id).length > 0) {
if ($("#chatbox_" + conversation_id).css('display') == 'none') {
$("#chatbox_" + conversation_id).css('display', 'block');
chatBox.restructure();
}
$("#chatbox_" + conversation_id + " .chatboxtextarea").focus();
return;
}
$("body").append('<div id="chatbox_' + conversation_id + '" class="chatbox"></div>')
$.get("conversations/" + conversation_id, function (data) {
$('#chatbox_' + conversation_id).html(data);
$("#chatbox_" + conversation_id + " .chatboxcontent").scrollTop($("#chatbox_" + conversation_id + " .chatboxcontent")[0].scrollHeight);
}, "html");
$("#chatbox_" + conversation_id).css('bottom', '0px');
chatBoxeslength = 0;
for (x in chatBoxes) {
if ($("#chatbox_" + chatBoxes[x]).css('display') != 'none') {
chatBoxeslength++;
}
}
if (chatBoxeslength == 0) {
$("#chatbox_" + conversation_id).css('right', '20px');
} else {
width = (chatBoxeslength) * (280 + 7) + 20;
$("#chatbox_" + conversation_id).css('right', width + 'px');
}
chatBoxes.push(conversation_id);
if (minimizeChatBox == 1) {
minimizedChatBoxes = new Array();
if ($.cookie('chatbox_minimized')) {
minimizedChatBoxes = $.cookie('chatbox_minimized').split(/\|/);
}
minimize = 0;
for (j = 0; j < minimizedChatBoxes.length; j++) {
if (minimizedChatBoxes[j] == conversation_id) {
minimize = 1;
}
}
if (minimize == 1) {
$('#chatbox_' + conversation_id + ' .chatboxcontent').css('display', 'none');
$('#chatbox_' + conversation_id + ' .chatboxinput').css('display', 'none');
}
}
chatboxFocus[conversation_id] = false;
$("#chatbox_" + conversation_id + " .chatboxtextarea").blur(function () {
chatboxFocus[conversation_id] = false;
$("#chatbox_" + conversation_id + " .chatboxtextarea").removeClass('chatboxtextareaselected');
}).focus(function () {
chatboxFocus[conversation_id] = true;
$('#chatbox_' + conversation_id + ' .chatboxhead').removeClass('chatboxblink');
$("#chatbox_" + conversation_id + " .chatboxtextarea").addClass('chatboxtextareaselected');
});
$("#chatbox_" + conversation_id).click(function () {
if ($('#chatbox_' + conversation_id + ' .chatboxcontent').css('display') != 'none') {
$("#chatbox_" + conversation_id + " .chatboxtextarea").focus();
}
});
$("#chatbox_" + conversation_id).show();
},
/**
* Responsible for listening to the keypresses when chatting. If the Enter button is pressed,
* we submit our conversation form to our rails app
*
* @param event
* @param chatboxtextarea
* @param conversation_id
*/
checkInputKey: function (event, chatboxtextarea, conversation_id) {
if (event.keyCode == 13 && event.shiftKey == 0) {
event.preventDefault();
message = chatboxtextarea.val();
message = message.replace(/^\s+|\s+$/g, "");
if (message != '') {
$('#conversation_form_' + conversation_id).submit();
$(chatboxtextarea).val('');
$(chatboxtextarea).focus();
$(chatboxtextarea).css('height', '44px');
}
}
var adjustedHeight = chatboxtextarea.clientHeight;
var maxHeight = 94;
if (maxHeight > adjustedHeight) {
adjustedHeight = Math.max(chatboxtextarea.scrollHeight, adjustedHeight);
if (maxHeight)
adjustedHeight = Math.min(maxHeight, adjustedHeight);
if (adjustedHeight > chatboxtextarea.clientHeight)
$(chatboxtextarea).css('height', adjustedHeight + 8 + 'px');
} else {
$(chatboxtextarea).css('overflow', 'auto');
}
},
/**
* Responsible for handling minimize and maximize of the chatbox
*
* @param conversation_id
*/
toggleChatBoxGrowth: function (conversation_id) {
if ($('#chatbox_' + conversation_id + ' .chatboxcontent').css('display') == 'none') {
var minimizedChatBoxes = new Array();
if ($.cookie('chatbox_minimized')) {
minimizedChatBoxes = $.cookie('chatbox_minimized').split(/\|/);
}
var newCookie = '';
for (i = 0; i < minimizedChatBoxes.length; i++) {
if (minimizedChatBoxes[i] != conversation_id) {
newCookie += conversation_id + '|';
}
}
newCookie = newCookie.slice(0, -1)
$.cookie('chatbox_minimized', newCookie);
$('#chatbox_' + conversation_id + ' .chatboxcontent').css('display', 'block');
$('#chatbox_' + conversation_id + ' .chatboxinput').css('display', 'block');
$("#chatbox_" + conversation_id + " .chatboxcontent").scrollTop($("#chatbox_" + conversation_id + " .chatboxcontent")[0].scrollHeight);
} else {
var newCookie = conversation_id;
if ($.cookie('chatbox_minimized')) {
newCookie += '|' + $.cookie('chatbox_minimized');
}
$.cookie('chatbox_minimized', newCookie);
$('#chatbox_' + conversation_id + ' .chatboxcontent').css('display', 'none');
$('#chatbox_' + conversation_id + ' .chatboxinput').css('display', 'none');
}
}
}
/**
* Cookie plugin
*
* Copyright (c) 2006 Klaus Hartl (stilbuero.de)
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
*
*/
jQuery.cookie = function (name, value, options) {
if (typeof value != 'undefined') { // name and value given, set cookie
options = options || {};
if (value === null) {
value = '';
options.expires = -1;
}
var expires = '';
if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {
var date;
if (typeof options.expires == 'number') {
date = new Date();
date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000));
} else {
date = options.expires;
}
expires = '; expires=' + date.toUTCString(); // use expires attribute, max-age is not supported by IE
}
// CAUTION: Needed to parenthesize options.path and options.domain
// in the following expressions, otherwise they evaluate to undefined
// in the packed version for some reason...
var path = options.path ? '; path=' + (options.path) : '';
var domain = options.domain ? '; domain=' + (options.domain) : '';
var secure = options.secure ? '; secure' : '';
document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join('');
} else { // only name given, get cookie
var cookieValue = null;
if (document.cookie && document.cookie != '') {
var cookies = document.cookie.split(';');
for (var i = 0; i < cookies.length; i++) {
var cookie = jQuery.trim(cookies[i]);
// Does this cookie string begin with the name we want?
if (cookie.substring(0, name.length + 1) == (name + '=')) {
cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
break;
}
}
}
return cookieValue;
}
};
}
$(document).ready(ready);
$(document).on("page:load", ready);
Raw
conversation.rb
class Conversation < ActiveRecord::Base
belongs_to :sender, :foreign_key => :sender_id, class_name: 'User'
belongs_to :recipient, :foreign_key => :recipient_id, class_name: 'User'
has_many :messages, dependent: :destroy
validates_uniqueness_of :sender_id, :scope => :recipient_id
scope :involving, -> (user) do
where("conversations.sender_id =? OR conversations.recipient_id =?",user.id,user.id)
end
scope :between, -> (sender_id,recipient_id) do
where("(conversations.sender_id = ? AND conversations.recipient_id =?) OR (conversations.sender_id = ? AND conversations.recipient_id =?)", sender_id,recipient_id, recipient_id, sender_id)
end
end
Raw
create_conversations.rb
class CreateConversations < ActiveRecord::Migration
def change
create_table :conversations do |t|
t.integer :sender_id
t.integer :recipient_id
t.timestamps
end
add_index :conversations, :sender_id
add_index :conversations, :recipient_id
end
end
Raw
message.rb
class Message < ActiveRecord::Base
belongs_to :conversation
belongs_to :user
validates_presence_of :body, :conversation_id, :user_id
end
Raw
user.html.erb
<% @users.each_with_index do |user, index| %>
<tr>
<td><%= index +=1 %></td>
<td><%= user.name %></td>
<td>
<%= link_to "Send Message", "#", class: "btn btn-success btn-xs start-conversation",
"data-sid" => current_user.id, "data-rip" => user.id %>
</td>
</tr>
<% end %>
Raw
user.rb
class User < ActiveRecord::Base
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
has_many :conversations, :foreign_key => :sender_id
end
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