From a87e6d26c5a4925ade9f24ae1741abd7c3d3f351 Mon Sep 17 00:00:00 2001
From: sostler <sbostler@gmail.com>
Date: Sun, 8 Nov 2009 23:45:24 -0500
Subject: Initial Checkin

---
 static/pichat.js | 170 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 170 insertions(+)
 create mode 100755 static/pichat.js

(limited to 'static/pichat.js')

diff --git a/static/pichat.js b/static/pichat.js
new file mode 100755
index 0000000..b12c772
--- /dev/null
+++ b/static/pichat.js
@@ -0,0 +1,170 @@
+// pichat.js
+
+var Nick = null;
+
+function handleJoinError(resp) {
+    var respText = resp.responseText ? resp.responseText.trim() : false;
+    if (respText == 'NICK_TAKEN') {
+        alert("Nick '" + Nick + "' was taken! Please choose another.");
+    } else if (respText)  {
+        alert("Cannot join! (" + respText + ")");
+    } else {
+        alert("Cannot join! Please try again later.");
+    }
+}
+
+function handleMsgError(resp) {
+    var respText = resp.responseText ? resp.responseText.trim() : false;
+    if (respText  == 'UNKNOWN_USER') {
+        alert("Can't send message! Please login.");
+    } else if (respText) {
+        alert("Cannot send message! (" + respText + ")");
+    } else {
+        alert("Cannot send message!");
+    }
+}
+
+function join() {
+    $('#join, #nick').attr('disabled', true);
+    $('#loginspinner').show();
+    Nick = $('#nick').val();
+
+    onSuccess = function(json) {
+        generateChatInterface(json.users, json.messages);
+    };
+
+    onError = function(resp, textStatus, errorThrown) {
+        $('#join, #nick').attr('disabled', false);
+        $('#loginspinner').hide();
+        handleJoinError(resp);
+    };
+    
+    $.ajax({
+        type: 'GET',
+        timeout: 5000,
+        url: 'join',
+        data: {'nick': Nick },
+        cache: false,
+        dataType: 'json',
+        success: onSuccess,
+        error: onError       
+    });
+}
+
+function buildUserDiv(user) {
+    return '<div>' + user + '</div>';
+}
+
+// http://snippets.dzone.com/posts/show/6995
+var URLRegex = /((http\:\/\/|https\:\/\/|ftp\:\/\/)|(www\.))+(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/i;
+
+function buildMessageDiv(msg) {
+    var match = URLRegex.exec(msg.content)
+    if (match) {
+        return '<div class="msgDev"><b>' + msg.nick + ': </b>'
+            + '<img height="150" width="150" src="' + match[0] + '" /></div>';
+    } else {
+        return '<div class="msgDiv"><b>' + msg.nick + ": </b>"
+            + msg.content + "</div>";
+    }
+}
+
+function buildChatInterface(users, messages) {
+    var userList = '<div id="userlist">'
+        + $.map(users, buildUserDiv).join('') + '</div>';
+    var messageList = '<div id="messagePane">'
+        + '<div id="messageList">'
+        + $.map(messages, buildMessageDiv).join('')
+        + '</div>'
+        + '<div id="msgInputDiv">'
+        + '<input type="input" id="msgInput">'
+        + '<input type="submit" value="Enter" id="msgSubmit">'
+        + '</div>'
+        + '</div>';
+    return '<h1>Pichat</h1><div id="chatbox">' + userList + messageList + '</div>';
+}
+
+function submitMessage() {
+    var content = $('#msgInput').val();
+    var msg = { 'nick': Nick, 'content': content,  'timestamp': new Date() };
+    if (content ==  '') { return; }
+
+    var shouldScroll = isScrolledToBottom($('#messageList')[0]);
+
+    $('#messageList').append($(buildMessageDiv(msg)));
+    $('#msgInput').val('');
+
+    if (shouldScroll) {
+        scrollToBottom($('#messageList')[0]);
+    }
+
+    var onSuccess = function() {};
+    var onError = function(resp, textStatus, errorThrown) {
+        handleMsgError(resp);
+    };
+
+   $.ajax({
+       type: 'GET',
+       timeout: 5000,
+       url: 'msg',
+       data: {'content': content },
+       cache: false,
+       dataType: 'json',
+       success: onSuccess,
+       error: onError       
+   });
+}
+
+function ifEnter(fn) {
+    return function(e) {
+        if (e.keyCode == 13) { fn(); }
+    };
+}
+
+function isScrolledToBottom(div) {
+    return Math.abs(div.scrollTop - (div.scrollHeight - div.offsetHeight)) <= 3;
+}
+
+function scrollToBottom(div) {
+    div.scrollTop = div.scrollHeight;
+}
+
+function refresh() {
+    var onSuccess = function(json) {
+        if (json.messages.length == 0) {
+            return;
+        }
+        
+        var shouldScroll = isScrolledToBottom($('#messageList')[0]);
+
+        // Ignore our own messages
+        var filterFunc = function(m) { return m.nick != Nick };
+        var msgStr = $.map($.grep(json.messages, filterFunc),
+                           buildMessageDiv).join('');
+        $('#messageList').append(msgStr);
+
+        if (shouldScroll) {
+            scrollToBottom($('#messageList')[0]);
+        }
+    };
+
+    var onError = function(resp, textStatus, errorThrown) {};
+
+    $.ajax({
+        type: 'GET',
+        timeout: 5000,
+        url: 'refresh',
+        cache: false,
+        dataType: 'json',
+        success: onSuccess,
+        error: onError       
+    });
+}
+
+function generateChatInterface(users, messages) {
+    $('#content').html(buildChatInterface(users, messages));
+    $('#msgInput').keyup(ifEnter(submitMessage));
+    $('#msgSubmit').click(submitMessage);
+    setInterval(refresh, 1000);
+}
+
-- 
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