<?php

require_once('../db.inc');

define('NO_CONTROLS', 0);
define('FORUM_CONTROLS', 1);
define('HELPDESK_CONTROLS', 2);

define ('SOLUTION', 'This answered my question');
define ('SUFFERER', 'I also have this question');
define ('OFF_TOPIC', 'Off-topic');

$forum_sort_styles['modified-new'] = "Most recent post first";
$forum_sort_styles['modified-old'] = "Least recent post first";
$forum_sort_styles['activity-most'] = "Most recent activity first";
$forum_sort_styles['views-most'] = "Most views first";
$forum_sort_styles['replies-most'] = "Most replies first";

$thread_sort_styles['date-old'] = "Oldest first";
$thread_sort_styles['date-new'] = "Newest first";
$thread_sort_styles['rating-high'] = "Highest rated first";
				
$thread_filter_styles['2'] = "\"Very helpful\"";
$thread_filter_styles['1'] = "At least \"helpful\"";
$thread_filter_styles['0'] = "At least \"neutral\"";
$thread_filter_styles['-1'] = "At least \"unhelpful\"";
$thread_filter_styles['-2'] = "All posts";

$post_ratings['2'] = "Very helpful (+2)";
$post_ratings['1'] = "Helpful (+1)";
$post_ratings['0'] = "Neutral";
$post_ratings['-1'] = "Unhelpful (-1)";
$post_ratings['-2'] = "Off topic (-2)";

db_init('../');

/* group database functions */

function getCategories() {
  $langID = (!empty($_SESSION['lang']['id']))?$_SESSION['lang']['id']:1;
  $sql = "SELECT * FROM category WHERE lang = ".$langID." AND is_helpdesk = 0 ORDER BY orderID ASC";
  return mysql_query($sql);
}

function getHelpDeskCategories() {
	$sql = "SELECT * FROM category WHERE is_helpdesk = 1 ORDER BY orderID ASC";
  return mysql_query($sql);
}

function getForums($categoryID) {
	$sql = 'SELECT * FROM forum WHERE category = ' . $categoryID . ' ORDER BY orderID ASC';
  return mysql_query($sql);	
}

function getThreads($forumID, $min = -1, $nRec = -1, $sort_style='modified-new') {
	$sql = 'SELECT * FROM thread WHERE forum = ' . $forumID; 
	switch($sort_style) {
		case 'modified-new':
			$sql = $sql . ' ORDER BY timestamp DESC';
			break;
    case 'modified-old':
			$sql = $sql . ' ORDER BY timestamp ASC';
			break;
		case 'views-most':
			$sql = $sql . ' ORDER BY views DESC';
			break;
		case 'replies-most':
			$sql = $sql . ' ORDER BY replies DESC';
			break;
		case 'activity-most':
			$sql = $sql . ' ORDER by activity DESC, timestamp DESC';
			break;
		case 'help-activity-most':
			$sql = $sql . ' ORDER by activity DESC, sufferers DESC';
			break;
	}
	if ($min > -1) {
		$sql .= ' LIMIT '.$min;
			if ($nRec > -1) {
				$sql .= ', '.$nRec;
			}
	} else if ($nRec > -1) {
		$sql .= ' LIMIT '.$nRec;
  }
	
  return mysql_query($sql);
}

function getPosts($threadID, $min = -1, $nRec = -1, $sort_style="date-old") {
	$sql = 'SELECT *, (score * votes) AS rating FROM post WHERE thread = '. $threadID;
	switch($sort_style) {
		case 'date-old':
			$sql = $sql . ' ORDER BY timestamp ASC';
			break;
		case 'date-new':
			$sql = $sql . ' ORDER BY timestamp DESC';
			break;
		case 'score-high':
			$sql = $sql . ' ORDER BY score DESC';
			break;
		case 'rating-high':
			$sql = $sql . ' ORDER BY rating DESC';
			break;
  }

  if ($min > -1) {
		$sql .= ' LIMIT '.$min;
		if ($nRec > -1) {
			$sql .= ', '.$nRec;
		}
	} elseif ($nRec > -1) {
		$sql .= ' LIMIT '.$nRec;
	}
	return mysql_query($sql);
}

/* specific database functions */

function getCategory($categoryID) {
	$sql = "SELECT * FROM category WHERE id = ".$categoryID;
	$result = mysql_query($sql);
	if ($result) {
  	return mysql_fetch_object($result);
	} else {
  	return NULL;
	}
}

function getForum($forumID) {
    $sql = "SELECT * FROM forum WHERE id = " . $forumID;
    $result = mysql_query($sql);
    if ($result) {
  		return mysql_fetch_object($result);
		} else {
			return NULL;
		}
}

function getThread($threadID) {
    $sql = "SELECT * FROM thread WHERE id = ".$threadID;
    $result = mysql_query($sql);
    if ($result) {
  		return mysql_fetch_object($result);
		} else {
			return NULL;
		}
}

function getPost($postID) {
    $sql = "SELECT * FROM post WHERE id = ".$postID;
    $result = mysql_query($sql);
    if ($result) {
  		return mysql_fetch_object($result);
		} else {
			return NULL;
		}
}

// Returns the post that started the thread with id = $threadId
function getFirstPost($threadID) {
	$sql = "SELECT * FROM post WHERE thread = " . $threadID ." ORDER BY id ASC";
	$result = mysql_query($sql);
  if ($result) {
  	return mysql_fetch_object($result);
	} else {
		return NULL;
	}
}

function incThreadViews($threadID) {
	$sql = "UPDATE thread SET views = views + 1 WHERE id = " . $threadID . " LIMIT 1";
	mysql_query($sql);
}

/* Forum modifying functions. */

function createThread($forumID, $ownerID, $title, $content) {
	
        $title = addslashes(htmlentities($title));
        $content = addslashes(htmlentities($content));
        
        $sql = "INSERT INTO thread (forum, owner, title, timestamp) VALUES (" . $forumID . ", " . $ownerID . ", '" . $title . "', UNIX_TIMESTAMP())";
        $result = mysql_query($sql);
        if (!$result)
            return false;
        $threadID = mysql_insert_id();
        
        $postID = addPost($threadID, $ownerID, NULL, $content);
        
        $sql = "UPDATE user SET posts = posts + 1 WHERE id = " . $ownerID . " LIMIT 1";
        mysql_query($sql);
        
        $sql = "UPDATE forum SET threads = threads + 1, posts = posts + 1, timestamp = UNIX_TIMESTAMP() WHERE id = " . $forumID . " LIMIT 1";
        mysql_query($sql);
        
        return $threadID;
}

function replyToThread($threadID, $userID, $content, $parent_post=NULL) {
      $thread = getThread($threadID);  
	
			$content = addslashes(htmlentities($content));
        
        addPost($threadID, $userID, $parent_post, $content);
        
        $sql = "UPDATE user SET posts = posts + 1 WHERE id = " . $userID . " LIMIT 1";
        mysql_query($sql);
                
        $sql = "UPDATE thread SET replies = replies + 1, timestamp = UNIX_TIMESTAMP() WHERE id = " . $threadID . " LIMIT 1";
        mysql_query($sql);
        
        $sql = "UPDATE forum SET posts = posts + 1, timestamp = UNIX_TIMESTAMP() WHERE id = " . $thread->forum . " LIMIT 1";
        mysql_query($sql);
    }

function addPost($threadID, $userID, $parentID, $content) {
        if ($parentID) {
            $sql = "INSERT INTO post (thread, user, timestamp, content, parent_post) VALUES (" . $threadID . ", " . $userID . ", UNIX_TIMESTAMP(), '" . $content . "', " . $parentID . ")";
        } else {
            $sql = "INSERT INTO post (thread, user, timestamp, content) VALUES (" . $threadID . ", " . $userID . ", UNIX_TIMESTAMP(), '" . $content . "')";
        }
        $result = mysql_query($sql);
        if (!$result)
            return false;
        //return ($post->id = mysql_insert_id());
       	mysql_insert_id();
       	return true;
}

function updatePost($postID, $content) {
        $sql = "UPDATE post SET content = \"$content\", modified = UNIX_TIMESTAMP() WHERE id = " . $postID;
        $result = mysql_query($sql);
        if (!$result)
            return false;
        return true;
}

/* display functions */

function show_posts($thread, $sort_style, $filter, $show_controls=true, $do_coloring=true, $is_helpdesk=false) {
    global $logged_in_user;
    $n = 0;
    
    if ($show_controls && !$is_helpdesk) {
        $controls = FORUM_CONTROLS;
    } else if ($show_controls && $is_helpdesk) {
        $controls = HELPDESK_CONTROLS;
    } else {
        $controls = NO_CONTROLS;
    }
    
    $posts = getPosts($thread->id, -1, -1, $sort_style);
    $firstPost = getFirstPost($thread->id);
    
    if ($is_helpdesk) {
        if ($firstPost) {
            show_post($firstPost, $thread, $logged_in_user, $n, $controls, true);
    	}
    }
    
    while ($post = mysql_fetch_object($posts)) {
        if ($post->score >= $filter) {
            if (!$is_helpdesk || ($is_helpdesk && $post->id != $firstPost->id)) {
            	show_post($post, $thread, $logged_in_user, $n, $controls, false);
            	if ($do_coloring) $n = ($n+1)%2;
            }
        }
    } 
}

function show_post($post, $thread, $logged_in_user, $n, $controls=FORUM_CONTROLS, $separate=false) {
	global $post_ratings;
	
	$user = lookup_user_id($post->user);
	$sql = "SELECT * FROM profile WHERE userid = " . $user->id;
	$result2 = mysql_query($sql);
	$user->has_profile = (mysql_num_rows($result2) > 0);
	
	$can_edit = $logged_in_user && $user->id == $logged_in_user->id;
	
	echo "
			<tr class=\"row$n\" style=\"vertical-align:top\">
				<td>
					<a name= $post->id ></a>
					<p style=\"font-weight:bold\">
	";
	
	if ($user->has_profile) { 
		echo "<a href=\"../view_profile.php?userid=$post->user\">", $user->name, "</a>";
	} else { 
		echo $user->name; 
	}
  
	echo "
				</p>
				<p style=\"font-size:8pt\">
					Joined: ", date('M j, Y', $user->create_time), "<br>Posts: ", $user->posts, " 
				</p>
			</td>
			<td>
	";

	if ($controls == FORUM_CONTROLS || $controls == HELPDESK_CONTROLS) {
		echo "<form action=\"rate.php?post=", $post->id, "\" method=\"post\">";
	}
	echo "
			<table width=100% cellspacing=0 cellpadding=0>
				<tr valign=\"top\">
					<td align=\"left\" style=\"border:0px\"><p style=\"font-size:8pt\">
						Posted: ", date('D M j, Y g:i a', $post->timestamp)
	;
        
	if ($post->parent_post) echo " in response to <a href=#$post->parent_post>Message ID $post->parent_post</a>.";
	if ($can_edit && $controls != NO_CONTROLS) echo "&nbsp;<a href=\"edit.php?id=$post->id\">[Edit this post]</a>"; 
	if ($post->modified) echo "<br>Last Modified: ", date('D M j, Y g:i a', $post->modified);
	
	echo "</p>\n</td>\n";
        
	if ($controls == FORUM_CONTROLS) {
		echo "<td align=\"right\" style=\"border:0px\">Rate this post:";
		show_combo_from_array("rating", $post_ratings, "0");
		echo "<input type=\"submit\" value=\"Rate\"></td>";
	} else if ($controls == HELPDESK_CONTROLS && $separate) {
		echo "
				<td align=\"right\" style=\"border:0px\">
					<input type=\"submit\" name=\"submit\" value=\"", SUFFERER, "\">
				</td>
		";
	} else if ($controls == HELPDESK_CONTROLS && !$separate) {
		echo "
				<td align=\"right\" style=\"border:0px\">
					<input type=\"submit\" name=\"submit\" value=\"", SOLUTION, "\">
					<input type=\"submit\" name=\"submit\" value=\"", OFF_TOPIC, "\">
				</td>
		";
	}

	echo "</tr>\n</table>\n";

	if ($controls == FORUM_CONTROLS || $controls == HELPDESK_CONTROLS) {            
		echo "</form>";
	}
	echo "<p>", nl2br(stripslashes($post->content)), "</p>";
	echo "<table width=100% cellspacing=0 cellpadding=0>
					<tr valign=\"bottom\">
						<td align=\"left\" style=\"border:0px; font-size:7pt\"><i>ID: ", $post->id;
	if ($controls == HELPDESK_CONTROLS && $separate) {
		echo "</i></td>";
	} else if ($controls == HELPDESK_CONTROLS && !$separate) {
		echo " / Score: ", ($post->score * $post->votes), "</i></td>";
	} else {
		echo " / Rating: ", $post->score, "</i></td>";
	}
	
	if ($controls == FORUM_CONTROLS) {
		echo "<td align=\"right\" style=\"border:0px\">[<a href=\"reply.php?thread=" . $thread->id . "&post=" . $post->id . "#input\">Reply to this post</a>]</td>";
	} else if ($controls == HELPDESK_CONTROLS && !$separate) {
		echo "<td align=\"right\" style=\"border:0px\">[<a href=\"reply.php?thread=" . $thread->id . "&post=" . $post->id . "&helpdesk=1#input\">Reply to this answer</a>]</td>";
	}	

	echo "</tr></table></td></tr>";
  
	if ($separate) {
		echo "
			</table>
			<br><br>
			<table class=\"content\" border=0 cellpadding=5 cellspacing=0 width=100%>
				<tr>
					<th style=\"width: 150px\">Author</th>
					<th>Answers</th>
		";
	}
}

/* utility functions */

function start_forum_table($headings, $widths, $span=NULL) {
	echo "
		<p style=\"text-align:center\">
			<table class=\"content\" border=0 cellpadding=5 cellspacing=0 width=100%>
				<tr>
	";
	
	for ($i = 0; $i < count($headings); $i++) {
		$cell = "<th";
		if ($span) {
			$cell = $cell . " colspan=$span";
		}
		if ($widths[$i]) {
			$cell = $cell . " style=\"width: " . $widths[$i] . "px\">";
		} else {
			$cell = $cell . ">";
		}
		echo $cell, $headings[$i], "</th>\n";
	}
	echo "</tr>\n";
}

function end_forum_table() {
	echo "</table></p>\n";
}

function show_combo_from_array($name, $array, $selection) {			
	echo "<select name=\"$name\">";
	
	foreach ($array as $key => $value) {
		echo "<option ";
		if ($key == $selection) {
			echo "selected ";
		}
		echo "value=\"", $key, "\">", $value, "</option>";
	}
	echo "</select>";
}

function show_forum_title($forum=NULL, $thread=NULL, $helpdesk=false) {
	echo "<p>\n";
	if (!$forum && !$thread) {
		echo "<p class=\"title\">", PROJECT;
		if ($helpdesk) {
			echo " Help Desk</p>";
		} else {
			echo " Forum</p>";
		}
	} else if ($forum && !$thread) {
		echo "<span class=\"title\">", $forum->title, "</span><br>";
		if ($helpdesk) {
			echo "<a href=\"help_desk.php\">", PROJECT, " Help Desk</a>";
		} else {
			echo "<a href=\"index.php\">", PROJECT, " Forum</a>";
		}
	} else if ($forum && $thread) {
		echo "<span class=\"title\">", $thread->title, "</span><br>";
		if ($helpdesk) {
			echo "<a href=\"help_desk.php\">", PROJECT, " Help Desk</a> -> <a href=\"forum.php?id=", $forum->id, "\">", $forum->title, "</a>";
		} else {
			echo "<a href=\"index.php\">", PROJECT, " Forum</a> -> <a href=\"forum.php?id=", $forum->id, "\">", $forum->title, "</a>";
		}
	} else {
		echo "Invalid input to show_forum_title<br>";
	}
	echo "</p>\n";
}
		
?>