diff -r 000000000000 -r 6904847e956b karma.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/karma.php	Fri Jul 30 23:03:02 2010 -0400
@@ -0,0 +1,161 @@
+<?php
+/**!info**
+{
+  "Plugin Name"  : "Karma",
+  "Plugin URI"   : "http://example.com/",
+  "Description"  : "Karma is a plugin that enables in the user page a voting system, to evaluate the popularity of each member.",
+  "Author"       : "Adriano Pereira",
+  "Version"      : "1.0",
+  "Author URI"   : "http://enanocms.org/"
+}
+**!*/
+
+$plugins->attachHook('userpage_sidebar_left',  'karma();');
+
+function karma()
+{
+  // Importing...
+  global $db, $session, $paths;
+  
+  if($session->user_logged_in)
+  {  
+
+  // If the user votes, get the vote
+  $vote = @$_GET['vote'];
+  
+  // Get the user_id from the user that is voting
+  $user_voting_id = $session->user_id;
+  
+  // Find the page_id that is the username of the current user page and gets the user_id from database
+  $username = $paths->page_id;
+  
+  $q = $db->sql_query('SELECT user_id FROM '. table_prefix. "users WHERE username = '$username'");
+  if ( !$q )
+    $db->_die();
+  $voted = $db->fetchrow();
+  $user_voted_id = $voted['user_id'];
+  
+  // Retrieves from database the total votes, yes votes, no votes and the karma from user
+  $q = $db->sql_query('SELECT karma, karma_total_votes, karma_yes_votes, karma_no_votes FROM '. table_prefix."users_extra WHERE user_id = '$user_voted_id'");
+  if ( !$q )
+    $db->_die();
+  $karma_info = $db->fetchrow();
+  $total_votes = $karma_info['karma_total_votes'];
+  $yes_votes = $karma_info['karma_yes_votes'];
+  $no_votes = $karma_info['karma_no_votes'];
+  $karma = $karma_info['karma'];
+  
+  // Search in the database if the user has already voted in this user
+  $q = $db->sql_query('SELECT user_voted_id, user_voting_id FROM '. table_prefix."karma WHERE user_voted_id = '$user_voted_id' AND user_voting_id = '$user_voting_id'");
+  if ( !$q )
+    $db->_die();
+  $num_votes = $db->numrows();
+  
+  // If the user that votes and the user voted id is equal or the user has already voted, displays the commom page
+  if ($user_voting_id == $user_voted_id) goto commom_page_title; 
+  
+  if ($num_votes == 0 && empty($vote)) goto vote;
+  
+  if ($num_votes != 0) goto commom_page_title;
+
+  // Know if the vote is yes or no and do the respective action in database
+  if ($vote == 'Yes')
+  {
+	$karma = $karma + 1;
+	$total_votes = $total_votes + 1;
+	$yes_votes = $yes_votes + 1;
+	$q = $db->sql_query('INSERT INTO '. table_prefix."karma (user_voting_id, user_voted_id) VALUES ('$user_voting_id', '$user_voted_id')");
+	if ( !$q )
+      $db->_die();
+	$q = $db->sql_query('UPDATE '. table_prefix."users_extra SET karma = '$karma', karma_total_votes = '$total_votes', karma_yes_votes = '$yes_votes' WHERE user_id = '$user_voted_id'");
+    if ( !$q )
+      $db->_die();  
+  }  
+  elseif ($vote == 'No')
+  {
+	$karma = $karma - 1;
+	$total_votes = $total_votes + 1;
+	$no_votes = $no_votes + 1;
+	$q = $db->sql_query('INSERT INTO '. table_prefix."karma (user_voting_id, user_voted_id) VALUES ('$user_voting_id', '$user_voted_id')");
+	if ( !$q )
+      $db->_die();
+	$q = $db->sql_query('UPDATE '. table_prefix."users_extra SET karma = '$karma', karma_total_votes = '$total_votes', karma_no_votes = '$no_votes' WHERE user_id = '$user_voted_id'");
+	if ( !$q )
+      $db->_die();	
+  }
+  else commom_page_title;
+  
+  // Label to commom page title
+  commom_page_title:
+?>
+ <th colspan="4"><?php echo $username."'s karma"; goto commom_page;?></th>
+	<?php
+	vote:
+	echo "<th colspan='4'>". $username."'s karma</th>";
+	echo <<<EOF
+		<tr>
+		<td colspan="4" class="row3" style="text-align: center;">
+		<b>Do you like me?</b><br/>
+		<form action=''>
+			<input type="submit" value="Yes" name="vote" style="background-color: #00CA00; border: 2px solid #000000; width: 40px; color: #FFFFFF; font-size: 14px; text-align:center;">
+			<input type="submit" value="No" name="vote" style="background-color: #FA1205; border: 2px solid #000000; width: 40px; color: #FFFFFF; font-size: 14px; text-align:center;">
+		</form>
+	</tr>
+EOF;
+  
+  // Label to commom page content and page content
+  commom_page:
+  
+  if ($karma < 0)
+  {
+	$karma_color = '#FA1205';
+  }
+  elseif ($karma > 0)
+  { 
+   $karma_color = '#00CA00';
+  }
+  else
+   {
+   $karma_color = '#000000';
+  }
+?>
+	<tr>
+		<td colspan="2" class="row1">
+			Your Karma is: <font color="<?php echo $karma_color;?>"><?php echo $karma;?><br/></font>
+		</td>
+		
+		<td colspan="2" class="row2">
+			'Yes' votes: <?php echo $yes_votes;?><br/>
+			'No' votes: <?php echo $no_votes;?><br/>
+			Number of votes: <?php echo $total_votes;?><br/>			
+		</td>
+	</tr>
+<?php
+}
+}
+
+/**!install dbms="mysql"; **
+CREATE TABLE {{TABLE_PREFIX}}karma(
+  vote_id int(18) NOT NULL auto_increment,
+  user_voting_id int(12),
+  user_voted_id int(12),  
+  PRIMARY KEY ( vote_id )
+ ) ENGINE=`MyISAM` CHARSET=`UTF8` COLLATE=`utf8_bin`;
+ 
+ALTER TABLE {{TABLE_PREFIX}}users_extra ADD COLUMN karma int(12) DEFAULT 0;
+ALTER TABLE {{TABLE_PREFIX}}users_extra ADD COLUMN karma_total_votes int(12) DEFAULT 0;
+ALTER TABLE {{TABLE_PREFIX}}users_extra ADD COLUMN karma_yes_votes int(12) DEFAULT 0;
+ALTER TABLE {{TABLE_PREFIX}}users_extra ADD COLUMN karma_no_votes int(12) DEFAULT 0;
+
+**!*/
+
+/**!uninstall **
+DROP TABLE {{TABLE_PREFIX}}karma;
+ALTER TABLE {{TABLE_PREFIX}}users_extra DROP karma;
+ALTER TABLE {{TABLE_PREFIX}}users_extra DROP karma_total_votes;
+ALTER TABLE {{TABLE_PREFIX}}users_extra DROP karma_yes_votes;
+ALTER TABLE {{TABLE_PREFIX}}users_extra DROP karma_no_votes;
+**!*/
+
+
+?>
\ No newline at end of file