<?php

/*
 * Snapr
 * Version 0.1 beta 1
 * Copyright (C) 2007 Dan Fuhry
 *
 * This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
 */

##
## GALLERY NAMESPACE HANDLER
##

$plugins->attachHook('page_not_found', 'gallery_namespace_handler($this);');
$plugins->attachHook('page_type_string_set', 'if ( $local_namespace == "Gallery" ) $this->namespace_string = \'image\';');

function gallery_namespace_handler(&$page)
{
	global $db, $session, $paths, $template, $plugins; // Common objects
	
	if ( $page->namespace != 'Gallery' )
		return false;
	
	if ( $page->page_id == 'Root' )
	{
		page_Special_Gallery();
		return true;
	}
	
	$row =& $page->image_info;
	
	$db->free_result();
	
	$img_id = $row['img_id'];
	
	if ( !$row['folder_parent'] )
		$row['folder_parent'] = ' IS NULL';
	else
		$row['folder_parent'] = '=' . $row['folder_parent'];
	
	// Fetch image parent properties
	$q = $db->sql_query('SELECT img_id, img_title FROM '.table_prefix.'gallery WHERE folder_parent' . $row['folder_parent'] . ' AND is_folder!=1 ORDER BY img_title ASC;');
	if ( !$q )
		$db->_die();
	
	$folder_total = $db->numrows();
	$folder_this = 0;
	$prev = false;
	$next = false;
	$next_title = '';
	$prev_title = '';
	
	$i = 0;
	
	while ( $r = $db->fetchrow() )
	{
		$i++;
		if ( $i == $folder_total && $r['img_id'] == $img_id )
		{
			$folder_this = $i;
			$next = false;
		}
		else if ( $i < $folder_total && $r['img_id'] == $img_id )
		{
			$folder_this = $i;
			$next = true;
		}
		else
		{
			if ( $next )
			{
				$next = $r['img_id'];
				$next_title = $r['img_title'];
				break;
			}
			$prev = $r['img_id'];
			$prev_title = $r['img_title'];
		}
	}
	
	if ( $next )
	{
		$next_sanitized = sanitize_page_id($next_title);
		$next_url = ( isset($hier) ) ? makeUrlNS('Gallery', $hier . $next_sanitized ) : makeUrlNS('Gallery', $next);
	}
	if ( $prev )
	{
		$prev_sanitized = sanitize_page_id($prev_title);
		$prev_url = ( isset($hier) ) ? makeUrlNS('Gallery', $hier . $prev_sanitized ) : makeUrlNS('Gallery', $prev);
	}
	
	$db->free_result();
	
	$perms = $session->fetch_page_acl(strval($img_id), 'Gallery');
	
	if ( isset($_POST['ajax']) && @$_POST['ajax'] === 'true' && isset($_POST['act']) )
	{
		$mode =& $_POST['act'];
		$response = array();
		switch($mode)
		{
			case 'add_tag':
				if ( !$perms->get_permissions('snapr_add_tag') )
				{
					die(snapr_json_encode(array(
							'mode' => 'error',
							'error' => 'You don\'t have permission to add tags.'
						)));
				}
				if ( empty($row['img_tags']) )
				{
					$row['img_tags'] = '[]';
				}
				$row['img_tags'] = snapr_json_decode($row['img_tags']);
				
				$canvas_data = snapr_json_decode($_POST['canvas_params']);
				$tag_data = array(
						'tag' => sanitize_html($_POST['tag']),
						'canvas_data' => $canvas_data
					);
				$row['img_tags'][] = $tag_data;
				$tag_data['note_id'] = count($row['img_tags']) - 1;
				$tag_data['mode'] = 'add';
				$tag_data['initial_hide'] = false;
				$tag_data['auth_delete'] = true;
				
				$row['img_tags'] = snapr_json_encode($row['img_tags']);
				$row['img_tags'] = $db->escape($row['img_tags']);
				$q = $db->sql_query('UPDATE ' . table_prefix . "gallery SET img_tags = '{$row['img_tags']}' WHERE img_id = $img_id;");
				if ( !$q )
					$db->die_json();
				
				$response[] = $tag_data;
				break;
			case 'del_tag':
				if ( !$perms->get_permissions('snapr_add_tag') )
				{
					die(snapr_json_encode(array(
							'mode' => 'error',
							'error' => 'You don\'t have permission to add tags.'
						)));
				}
				if ( empty($row['img_tags']) )
				{
					$row['img_tags'] = '[]';
				}
				$row['img_tags'] = snapr_json_decode($row['img_tags']);
				
				$tag_id = intval(@$_POST['tag_id']);
				if ( isset($row['img_tags'][$tag_id]) )
					unset($row['img_tags'][$tag_id]);
				
				$row['img_tags'] = snapr_json_encode($row['img_tags']);
				$row['img_tags'] = $db->escape($row['img_tags']);
				$q = $db->sql_query('UPDATE ' . table_prefix . "gallery SET img_tags = '{$row['img_tags']}' WHERE img_id = $img_id;");
				if ( !$q )
					$db->die_json();
				
				$response[] = array(
						'mode' => 'remove',
						'note_id' => $tag_id
					);
				break;
			case 'edit_tag':
				if ( !$perms->get_permissions('snapr_add_tag') )
				{
					die(snapr_json_encode(array(
							'mode' => 'error',
							'error' => 'You don\'t have permission to edit tags.'
						)));
				}
				if ( empty($row['img_tags']) )
				{
					$row['img_tags'] = '[]';
				}
				$row['img_tags'] = snapr_json_decode($row['img_tags']);
				
				$tag_id = intval(@$_POST['tag_id']);
				if ( isset($row['img_tags'][$tag_id]) )
				{
					$row['img_tags'][$tag_id]['tag'] = sanitize_html($_POST['tag']);
					// copy it
					$tag_return = $row['img_tags'][$tag_id];
					unset($tag);
				}
				else
				{
					die(snapr_json_encode(array(
							'mode' => 'error',
							'error' => 'That tag doesn\'t exist.'
						)));
				}
				
				$row['img_tags'] = snapr_json_encode($row['img_tags']);
				$row['img_tags'] = $db->escape($row['img_tags']);
				$q = $db->sql_query('UPDATE ' . table_prefix . "gallery SET img_tags = '{$row['img_tags']}' WHERE img_id = $img_id;");
				if ( !$q )
					$db->die_json();
				
				$tag_return['mode'] = 'add';
				$tag_return['canvas_data'] = snapr_json_decode($_POST['canvas_params']);
				$tag_return['auth_delete'] = $perms->get_permissions('snapr_add_tag');
				$tag_return['initial_hide'] = false;
				$tag_return['note_id'] = $tag_id;
				$response = array($tag_return);
				
				break;
			case 'get_tags':
				if ( empty($row['img_tags']) )
				{
					$row['img_tags'] = '[]';
				}
				$response = snapr_json_decode($row['img_tags']);
				foreach ( $response as $key => $_ )
				{
					unset($_);
					$tag = $response[$key];
					unset($response[$key]);
					$tag['note_id'] = intval($key);
					$tag['mode'] = 'add';
					$tag['initial_hide'] = true;
					$tag['auth_delete'] = $perms->get_permissions('snapr_add_tag');
					$response[intval($key)] = $tag;
				}
				$response = array_values($response);
				unset($tag);
				break;
		}
		$encoded = snapr_json_encode($response);
		header('Content-type: text/plain');
		echo $encoded;
		return true;
	}
	
	$have_notes = ( empty($row['img_tags']) ) ? false : ( count(snapr_json_decode($row['img_tags'])) > 0 );
	
	$template->add_header('<script type="text/javascript" src="' . scriptPath . '/plugins/gallery/canvas.js"></script>');
	$template->add_header('<script type="text/javascript" src="' . scriptPath . '/plugins/gallery/tagging.js"></script>');
	
	$template->tpl_strings['PAGE_NAME'] = 'Gallery image: ' . htmlspecialchars($row['img_title']);
	if ( is_object(@$GLOBALS['output']) )
	{
		global $output;
		$output->set_title('Gallery image: ' . $row['img_title']);
	}
	else if ( method_exists($template, 'assign_vars') )
	{
		$template->assign_vars(array(
				'PAGE_NAME' => 'Gallery image: ' . htmlspecialchars($row['img_title'])
			));
	}
	$title_spacey = strtolower(htmlspecialchars($row['img_title']));
	
	$template->header();
	
	$img_id = intval($img_id);
	$bc_folders = gallery_imgid_to_folder($img_id);
	$bc_folders = array_reverse($bc_folders);
	$bc_url = '';
	$breadcrumbs = array();
	$breadcrumbs[] = '<a href="' . makeUrlNS('Special', 'Gallery') . '">Gallery index</a>';
	
	foreach ( $bc_folders as $folder )
	{
		$bc_url .= '/' . dirtify_page_id($folder);
		$breadcrumbs[] = '<a href="' . makeUrlNS('Special', 'Gallery' . $bc_url, false, true) . '">' . htmlspecialchars($folder) . '</a>';
	}
	
	$breadcrumbs[] = htmlspecialchars($row['img_title']);
	
	// From here, this breadcrumb stuff is a piece of... sourdough French bread :-) *smacks lips*
	echo '<div class="breadcrumbs" style="padding: 4px; margin-bottom: 7px;">';
	// The actual breadcrumbs
	echo '<small>' . implode(' &raquo; ', $breadcrumbs) . '</small>';
	echo '</div>';
	
	echo '<div style="text-align: center; margin: 10px auto; border: 1px solid #DDDDDD; padding: 7px 10px; display: table;">';
	$img_url  = makeUrlNS('Special', 'GalleryFetcher/preview/' . $img_id);
	$img_href = makeUrlNS('Special', 'GalleryFetcher/full/' . $img_id);
	
	// The actual image
	$iehack = ( strstr(@$_SERVER['HTTP_USER_AGENT'], 'MSIE') ) ? ' style="width: 1px;"' : '';
	echo '<div snapr:imgid="' . $img_id . '"' . $iehack . '><img onload="snapr_lock_onload_img = false; snapr_tags_onload_real();" alt="Image preview (640px max width)" src="' . $img_url . '" id="snapr_preview_img" style="border-width: 0; margin-bottom: 5px; display: block;" /></div>';
	
	echo '<table border="0" width="100%"><tr><td style="text-align: left; width: 24px;">';
	
	// Prev button
	if ( $prev )
		echo '<a href="' . $prev_url . '"><img style="border-width: 0px;" alt="&lt; Previous" src="' . scriptPath . '/plugins/gallery/prev.gif" /></a>';
	//echo '</td><td style="text-align: left;">';
	// if ( $prev )
	//   echo '<a href="' . $prev_url . '">previous image</a>';
	
	echo '</td><td style="text-align: center; letter-spacing: 5px;">';
	
	// Image title
	echo $title_spacey;
	
	echo '</td><td style="text-align: right; width: 24px;">';
	
	// Next button
	if ( $next )
	//  echo '<a href="' . $next_url . '">next image</a>';
	//echo '</td><td style="text-align: right;">';
	if ( $next )
		echo '<a href="' . $next_url . '"><img style="border-width: 0px;" alt="&lt; Previous" src="' . scriptPath . '/plugins/gallery/next.gif" /></a>';
	
	echo '</td></tr>';
	echo '<tr><td colspan="3">' . "image $folder_this of $folder_total" . '</td></tr>';
	if ( $perms->get_permissions('gal_full_res') || $have_notes )
	{
		echo '<tr><td colspan="3"><small>';
		
		if ( $perms->get_permissions('gal_full_res') )
			echo "<a href=\"$img_href\" onclick=\"window.open(this.href, '', 'toolbar=no,address=no,menus=no,status=no,scrollbars=yes'); return false;\">View in original resolution</a>";
		
		if ( $perms->get_permissions('gal_full_res') && $have_notes )
			echo ' :: ';
		
		if ( $have_notes )
			echo 'Mouse over photo to view tags';
		
		echo '</small></td></tr>';
	}
	echo '</table>';
	echo '</div>';
	
	if ( $session->user_level >= USER_LEVEL_ADMIN || $perms->get_permissions('snapr_add_tag') )
	{
		echo '<div style="float: right;">';
		if ( $session->user_level >= USER_LEVEL_ADMIN )
			echo '[ <a href="' . makeUrlNS('Special', 'GalleryUpload', 'edit_img=' . $img_id, true) . '">edit image</a> ] ';
		if ( $perms->get_permissions('snapr_add_tag') )
			echo '[ <a href="#" onclick="snapr_add_tag(); return false;"><img alt=" " src="' . scriptPath . '/plugins/gallery/tag-image.gif" style="border-width: 0;" /> add a tag</a> ] ';
		echo '</div>';
	}
	
	if ( !empty($row['img_desc']) )
	{
		echo '<h2>Image description</h2>';
		
		$desc = RenderMan::render($row['img_desc']);
		echo $desc;
	}
	
	echo '<div class="tblholder" style="font-size: smaller; display: table;' . ( empty($row['img_desc']) ? '' : 'margin: 0 auto;' ) . '">
					<table border="0" cellspacing="1" cellpadding="3">';
	
	// By the time I got to this point, it was 1:32AM (I was on vacation) and my 5-hour playlist on my iPod had been around about 3 times today.
	// So I'm glad this is like the last thing on the list tonight.
	
	$ext = get_file_extension($row['img_filename']);
	$ext = strtoupper($ext);
	
	$user_link = '';
	
	echo '<tr><th colspan="2">Image details</th></tr>';
	echo '<tr><td class="row2">Uploaded:</td><td class="row1">' . date('F d, Y h:i a', $row['img_time_upload']) . '</td></tr>';
	echo '<tr><td class="row2">Last modified:</td><td class="row1">' . date('F d, Y h:i a', $row['img_time_mod']) . '</td></tr>';
	echo '<tr><td class="row2">Original format:</td><td class="row1">' . $ext . '</td></tr>';
	echo '<tr><td class="row2">Author:</td><td class="row1">' . $user_link . '</td></tr>';
	echo '<tr><td class="row3" colspan="2" style="text-align: center;"><a href="' . makeUrlNS('Special', 'GalleryFetcher/full/' . $img_id, 'download', 'true') . '">Download image</a></td></tr>';
					
	echo '</table></div>';
	
	$template->footer();
}

/**
 * This is for Enano 1.1.6 and up.
 */

class Namespace_Gallery extends Namespace_Default
{
	public $image_info;
	
	function __construct($page_id, $namespace, $revision_id = 0)
	{
		global $db, $session, $paths, $template, $plugins; // Common objects
			
		$this->page_id = sanitize_page_id($page_id);
		$this->namespace = $namespace;
		$this->revision_id = intval($revision_id);
		
		// only do this if calling from the (very heavily feature filled) abstract
		// this will still be called if you're using your own handler but not replacing the constructor
		if ( __CLASS__ == 'Namespace_Gallery' )
		{
			$this->exists = false;
			// NOTE! These should already be WELL sanitized before we reach this stage.
			
			if ( preg_match('/^[0-9]+$/', $this->page_id) )
			{
				$img_id = intval($this->page_id);
				if ( !$img_id )
				{
					$this->exists = false;
					return;
				}
				$q = $db->sql_query('SELECT img_id, img_title, img_desc, print_sizes, img_time_upload, img_time_mod, img_filename, folder_parent, img_tags FROM '.table_prefix.'gallery WHERE img_id=' . $img_id . ';');
				if ( !$q )
					$db->_die();
			}
			else
			{
				// Ech... he sent us a string... parse it and see what we get
				if ( strstr($this->page_id, '/') )
				{
					$folders = explode('/', $this->page_id);
				}
				else
				{
					$folders = array($this->page_id);
				}
				foreach ( $folders as $i => $_crap )
				{
					$folder =& $folders[$i];
					$folder = dirtify_page_id($folder);
					$folder = str_replace('_', ' ', $folder);
				}
				unset($folder);
				
				$folders = array_reverse($folders);
				// This is one of the best MySQL tricks on the market. We're going to reverse-travel a folder path using LEFT JOIN and the incredible power of metacoded SQL
				$sql = 'SELECT g0.img_id, g0.img_title, g0.img_desc, g0.print_sizes, g0.img_time_upload, g0.img_time_mod, g0.img_filename, g0.folder_parent, g0.img_tags FROM '.table_prefix.'gallery AS g0';
				$where = "\n  " . 'WHERE g0.img_title=\'' . $db->escape($folders[0]) . '\'';
				foreach ( $folders as $i => $folder )
				{
					if ( $i == 0 )
						continue;
					$i_dec = $i - 1;
					$folder = $db->escape($folder);
					$sql .= "\n  LEFT JOIN ".table_prefix."gallery AS g{$i}\n    ON ( g{$i}.img_id=g{$i_dec}.folder_parent AND g{$i}.img_title='$folder' )";
					$where .= "\n    ".'AND g'.$i.'.img_id IS NOT NULL';
				}
				$where .= "\n    AND g{$i}.folder_parent IS NULL";
				$sql .= $where . ';';
				
				if ( !$db->sql_query($sql) )
				{
					$db->_die('The image metadata could not be loaded.');
				}
				
				// Now that the folder data is no longer needed, we can fool around with it a little
				$folders = $this->page_id;
				if ( !strstr($folders, '/') )
				{
					$hier = '/';
				}
				else
				{
					$hier = preg_replace('/\/([^\/]+)$/', '/', $folders);
					$hier = sanitize_page_id($hier);
				}
				
			}
			if ( $db->numrows() < 1 )
			{
				// Image not found
				$this->exists = false;
				$this->cdata = array(
						'urlname' => $this->page_id,
						'namespace' => $this->namespace,
						'name' => 'Image not found',
						'special' => 0,
						'visible' => 0,
						'comments_on' => 0,
						'protected' => 0,
						'delvotes' => 0,
						'delvote_ips' => '',
						'wiki_mode' => 0,
						'page_exists' => false,
						'page_format' => getConfig('default_page_format', 'wikitext')
					);
			}
			else
			{
				$this->image_info = $db->fetchrow();
				$this->exists = true;
				$this->cdata = array(
						'urlname' => $this->page_id,
						'namespace' => $this->namespace,
						'name' => $this->image_info['img_title'],
						'special' => 1,
						'visible' => 1,
						'comments_on' => 1,
						'protected' => 0,
						'delvotes' => 0,
						'delvote_ips' => '',
						'wiki_mode' => 0,
						'page_exists' => true,
						'page_format' => getConfig('default_page_format', 'wikitext')
					);
			}
			$this->title =& $this->cdata['name'];
			$this->cdata = Namespace_Default::bake_cdata($this->cdata);
			
			$db->free_result();
		}
	}
	
	function send()
	{
		if ( $this->exists )
		{
			gallery_namespace_handler($this);
		}
		else
		{
			global $output;
			$output->header();
			$this->error_404();
			$output->footer();
		}
	}
	
	function error_404()
	{
		echo '<h3>There is no image in the gallery with this ID.</h3>';
		echo '<p>You have requested an image that couldn\'t be looked up. Please check the URL and try again, or visit the <a href="' . makeUrlNS('Special', 'Gallery') . '">Gallery index</a>.</p>';
	}
}

?>