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keystroke-chat.js
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keystroke-chat.js
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(function(){
// ------------------------------------------------------------------------- //
// Utility Functions
// ------------------------------------------------------------------------- //
var store = localStorage
, db = store && {
set : function( key, val ) {db.remove(key);store.setItem(key,val)},
get : function(key) { return store.getItem(key) },
remove : function(key) { store.removeItem(key) }
};
// ------------------------------------------------------------------------- //
// Templates and HTML
// ------------------------------------------------------------------------- //
var message_bubble_tpl = '<div style="display:inline-block;float:left;font-family:Arial;width:382px;background-color:#{background};color:#fff;text-shadow:#000 0 1px 1px;background-image:-moz-linear-gradient(rgba(255,255,255,0.8)0%,rgba(0,0,0,0)100%);background-image:-webkit-gradient(linear,left top,left bottom,from(rgba(255,255,255,0.8)),to(rgba(0,0,0,0)));border:0;margin:10px;padding:10px 20px 10px 20px;border-radius:50px;-moz-border-radius:50px;-webkit-border-radius:50px;overflow:hidden;-o-transition:all 0.3s;-moz-transition:all 0.3s;-webkit-transition:all 0.3s;transition:all 0.3s;position:relative;"><strong>{username} - </strong> {message}</div>'
, interface_tpl = '<div style="width:400px;background:#fff;border:0px solid #ccc;margin:10px;padding:10px;border-radius:12px;-moz-border-radius:12px;-webkit-border-radius:12px;"><div style="font-family:Arial;font-size:11px;margin:0 10px 10px 0;text-align:right;"><a href="#" id="keystroke-chat-username-change">Change Username</a></div><textarea id="keystroke-chat-input" style="width:370px;height:40px;font-weight:normal;padding:14px;border:0px solid #999;border-radius:20px;-moz-border-radius:20px;-webkit-border-radius:4px;-webkit-box-shadow:inset #aaa 0 1px 5px;-moz-box-shadow:inset #aaa 0 1px 5px;box-shadow:inset #aaa 0 1px 5px;text-shadow:#bbb 0 1px 2px;overflow-x:hidden;-o-transition:all 0.3s;-moz-transition:all 0.3s;-webkit-transition:all 0.3s;transition:all 0.3s;"></textarea><div><button id="keystroke-chat-send" style="margin-top:10px;width:150px;padding:2px;color:#fff;font-weight:bold;font-size:12px;border-radius:70px;-moz-border-radius:70px;-webkit-border-radius:70px;cursor:pointer;text-shadow:rgba(0,0,0,0.5)0 -1px 2px;background-color:#44d5ff;background-image:-moz-linear-gradient(rgba(255,255,255,0.7)0%,rgba(255,255,255,0)20%,rgba(255,255,255,0.2)80%,rgba(0,0,0,0.3)100%);background-image:-webkit-gradient(linear,left top,left bottom,from(rgba(255,255,255,0.7)),color-stop(0.2,rgba(255,255,255,0)),color-stop(0.8,rgba(255,255,255,0.2)),to(rgba(0,0,0,0.3)));box-shadow:0 -1px 2px #000;-moz-box-shadow:0 -1px 2px #000;-webkit-box-shadow:0 -1px 2px #000;-o-transition:all 0.3s;-moz-transition:all 0.3s;-webkit-transition:all 0.3s;transition:all 0.3s;border:0px;">New Bubble</button> <button id="keystroke-chat-turn-off" style="margin-top:10px;width:150px;padding:2px;color:#fff;font-weight:bold;font-size:12px;border-radius:70px;-moz-border-radius:70px;-webkit-border-radius:70px;cursor:pointer;text-shadow:rgba(0,0,0,0.5)0 -1px 2px;background:#f44;background-image:-moz-linear-gradient(rgba(255,255,255,0.7)0%,rgba(255,255,255,0)20%,rgba(255,255,255,0.2)80%,rgba(0,0,0,0.3)100%);background-image:-webkit-gradient(linear,left top,left bottom,from(rgba(255,255,255,0.7)),color-stop(0.2,rgba(255,255,255,0)),color-stop(0.8,rgba(255,255,255,0.2)),to(rgba(0,0,0,0.3)));box-shadow:0 -1px 2px #000;-moz-box-shadow:0 -1px 2px #000;-webkit-box-shadow:0 -1px 2px #000;border:0px;">Turn OFF</button></div></div><div id="keystroke-chat-messages"></div></div><div id="keystroke-chat-messages"></div><audio id=keystroke-chat-audio preload ><source src=http://pubnub.s3.amazonaws.com/general/preview.ogg type=audio/ogg ></audio>';
// ------------------------------------------------------------------------- //
// Setup
// ------------------------------------------------------------------------- //
var settings = PUBNUB.$('real-time-keystrok-chat') ||
alert('Missing DIV for Keystroke Chat')
, channel = PUBNUB.attr( settings, 'channel' )
, topic = PUBNUB.attr( settings, 'topic' )
, pubrate = +PUBNUB.attr( settings, 'pubrate' )
, maxmsg = -PUBNUB.attr( settings, 'max-message' )
, maxbbl = +PUBNUB.attr( settings, 'max-bubble-flood' )
, curbbl = 0
, username = db && db.get('username') || 'Anonymous'
, uuid = PUBNUB.uuid(function(id){ uuid = id })
, bubbles = {}
, publishes = 1
, type_ival = 1
, is_done = 0
, typing = 0
, br_rx = /[\r\n<>]/g;
settings.innerHTML = interface_tpl;
var message_area = PUBNUB.$('keystroke-chat-messages')
, post_message = PUBNUB.$('keystroke-chat-send')
, username_change = PUBNUB.$('keystroke-chat-username-change')
, turn_off = PUBNUB.$('keystroke-chat-turn-off')
, audio = PUBNUB.$('keystroke-chat-audio')
, textarea = PUBNUB.$('keystroke-chat-input');
// ------------------------------------------------------------------------- //
// Receive Keystrokes
// ------------------------------------------------------------------------- //
PUBNUB.subscribe({
'channel' : channel,
'callback' : function(message) {
var the_uuid = message['uuid'];
// Add Bubble if not present.
if (!bubbles[the_uuid]) {
var new_bubble = PUBNUB.create('div');
message_area.insertBefore(
new_bubble,
message_area.firstChild
);
bubbles[the_uuid] = new_bubble;
bubbles[the_uuid]['last'] = 0;
}
// Alias Bubble Div
var bubble = bubbles[the_uuid];
// Ignore Latent Unsynchronized Messages
if (bubble['last'] > message['last']) return;
bubble['last'] = message['last'];
// Update The Message Text Body
bubble.innerHTML = PUBNUB.supplant( message_bubble_tpl, {
'username' : message['user'] || 'Anonymous',
'background' : the_uuid.slice(-3),
'message' : message['text']
} );
// Animate For Cool Effect
if (!bubble['shown']) {
bubble['shown'] = 1;
PUBNUB.css( bubble.firstChild, { 'top' : 100 } );
setTimeout( function() {
PUBNUB.css( bubble.firstChild, { 'top' : '0' } );
}, 10 );
}
}
});
// ------------------------------------------------------------------------- //
// Send Keystrokes
// ------------------------------------------------------------------------- //
var send_keystroke = PUBNUB.updater( function() { setTimeout(function(){
if (!uuid) return;
PUBNUB.publish({
'channel' : channel,
'message' : {
'uuid' : uuid,
'user' : username,
'last' : ++publishes,
'text' : (textarea.value || '')
.slice(maxmsg)
.replace( br_rx, '' )
}
});
}, 20 ) }, pubrate );
PUBNUB.bind( 'keydown', textarea, function(e) {
if (e.keyCode == 13) return new_bubble();
typing || PUBNUB.events.fire('typing-started');
typing = 1;
clearTimeout(type_ival);
type_ival = setTimeout( function() {
PUBNUB.events.fire('typing-stopped');
typing = 0;
}, 1000 );
send_keystroke();
return true;
} );
// ------------------------------------------------------------------------- //
// New Bubble
// ------------------------------------------------------------------------- //
function new_bubble() {
// Prevent Flooding
if (curbbl > maxbbl) return PUBNUB.css( post_message, {
'backgroundColor' : '#f00',
'color' : '#000'
} );
curbbl++;
uuid = publishes + uuid;
setTimeout( function() {
textarea.value = '';
textarea.focus();
send_keystroke();
}, 20 );
}
setInterval( function() {
// Show Okay to make New Bubble
if (curbbl > maxbbl) PUBNUB.css( post_message, {
'backgroundColor' : '#44d5ff',
'color' : '#fff'
} );
curbbl = curbbl > 0 ? curbbl - 1 : 0;
}, 5000 );
PUBNUB.bind( 'mousedown,touchstart', post_message, new_bubble );
// ------------------------------------------------------------------------- //
// Typing Started
// ------------------------------------------------------------------------- //
PUBNUB.events.bind( 'typing-started', function() {
if (is_done) return;
if (textarea.value.indexOf('please the textbox:') < 0) return;
audio.currentTime = 10;
audio.play();
var type_vel = 1000;
function increasing_blink(timer) { setTimeout( function() {
PUBNUB.css( textarea, { background : '#fff', color : '#222' } );
if (audio.currentTime > 37)
PUBNUB.events.fire('typing-no-longer-needed');
typing && !is_done && setTimeout( function() {
PUBNUB.css( textarea, { background : '#4e2', color : '#fff' } );
type_vel < 140 && (type_vel = 200);
increasing_blink(type_vel -= 50);
}, timer );
}, timer ); }
is_done || increasing_blink(type_vel);
} );
PUBNUB.events.bind( 'typing-no-longer-needed', function() {
is_done = 1;
PUBNUB.each( PUBNUB.search('*'), function(elm) {
PUBNUB.css( elm, { 'background' : '#f31' } );
} );
} );
// ------------------------------------------------------------------------- //
// Typing Stopped
// ------------------------------------------------------------------------- //
PUBNUB.events.bind( 'typing-stopped', function() {
PUBNUB.css( textarea, { background : '#fff' } );
audio.pause();
} );
// ------------------------------------------------------------------------- //
// Change Username
// ------------------------------------------------------------------------- //
PUBNUB.bind( 'mousedown,touchstart', username_change, function() {
username = (prompt('Username:')||'None').substr( 0, 10 );
send_keystroke();
// Save Username if Possible
db && db.set( 'username', username );
} );
// ------------------------------------------------------------------------- //
// Turn OFF
// ------------------------------------------------------------------------- //
PUBNUB.bind( 'click', turn_off, function() {
var turn_it_off = confirm("Turn OFF?");
if (!turn_it_off) return;
PUBNUB.css( settings, { 'display' : 'none' } );
PUBNUB.unsubscribe({ 'channel' : channel });
} );
})();