<?php

if (!defined('IN_FORUM')) die("Hacking attempt");

$allowed_extensions = array();
$display_categories = array();
$download_modes = array();
$upload_icons = array();
$attachments = array();

/**
* Create needed arrays for Extension Assignments
*/
function init_complete_extensions_data()
{
	global $allowed_extensions, $display_categories, $download_modes, $upload_icons;

	if (!$extension_informations = get_extension_informations())
	{
		$GLOBALS['datastore']->update('attach_extensions');
		$extension_informations = get_extension_informations();
	}

	$allowed_extensions = array();
	for ($i = 0, $size = sizeof($extension_informations); $i < $size; $i++)
	{
		$extension = strtolower(trim($extension_informations[$i]['extension']));
		// Get allowed extensions
		if ((int) $extension_informations[$i]['allow_group'] === 1)
		{
			$allowed_extensions[] = $extension;
		}
		$display_categories[$extension] = intval($extension_informations[$i]['cat_id']);
		$download_modes[$extension] = intval($extension_informations[$i]['download_mode']);
		$upload_icons[$extension] = trim($extension_informations[$i]['upload_icon']);
	}
}

/**
* Writing Data into plain Template Vars
*/
function init_display_template($template_var, $replacement, $filename = 'viewtopic_attach.tpl')
{
	global $template;

	// This function is adapted from the old template class
	// I wish i had the functions from the 3.x one. :D (This class rocks, can't await to use it in Mods)

	// Handle Attachment Informations
	if (!isset($template->uncompiled_code[$template_var]) && empty($template->uncompiled_code[$template_var]))
	{
		// If we don't have a file assigned to this handle, die.
		if (!isset($template->files[$template_var]))
		{
			die("Template->loadfile(): No file specified for handle $template_var");
		}

		$filename_2 = $template->files[$template_var];

		$str = implode('', @file($filename_2));
		if (empty($str))
		{
			die("Template->loadfile(): File $filename_2 for handle $template_var is empty");
		}

		$template->uncompiled_code[$template_var] = $str;
	}

	$complete_filename = $filename;
	if (substr($complete_filename, 0, 1) != '/')
	{
		$complete_filename = $template->root . '/' . $complete_filename;
	}

	if (!file_exists($complete_filename))
	{
		die("Template->make_filename(): Error - file $complete_filename does not exist");
	}

	$content = implode('', file($complete_filename));
	if (empty($content))
	{
		die('Template->loadfile(): File ' . $complete_filename . ' is empty');
	}

	// replace $replacement with uncompiled code in $filename
	$template->uncompiled_code[$template_var] = str_replace($replacement, $content, $template->uncompiled_code[$template_var]);
}

/**
* Display Attachments in Posts
*/
function display_post_attachments($post_id, $switch_attachment)
{
	global $attach_config, $is_auth;

	if (intval($switch_attachment) == 0 || intval($attach_config['disable_mod']))
	{
		return;
	}

	if ($is_auth['auth_download'] && $is_auth['auth_view'])
	{
		display_attachments($post_id);
	}
}

/**
* Initializes some templating variables for displaying Attachments in Posts
*/
function init_display_post_attachments($switch_attachment)
{
	global $attach_config, $is_auth, $template, $lang, $postrow, $total_posts, $attachments, $forum_row, $t_data;

	if (empty($t_data) && !empty($forum_row))
	{
		$switch_attachment = $forum_row['topic_attachment'];
	}

	if (intval($switch_attachment) == 0 || intval($attach_config['disable_mod']) || (!($is_auth['auth_download'] && $is_auth['auth_view'])))
	{
		init_display_template('body', '{postrow.ATTACHMENTS}', 'viewtopic_attach_guest.tpl');
		return;
	}

	$post_id_array = array();

	for ($i = 0; $i < $total_posts; $i++)
	{
		if ($postrow[$i]['post_attachment'] == 1)
		{
			$post_id_array[] = (int) $postrow[$i]['post_id'];
		}
	}

	if (sizeof($post_id_array) == 0)
	{
		return;
	}

	$rows = get_attachments_from_post($post_id_array);
	$num_rows = sizeof($rows);

	if ($num_rows == 0)
	{
		return;
	}

	@reset($attachments);

	for ($i = 0; $i < $num_rows; $i++)
	{
		$attachments['_' . $rows[$i]['post_id']][] = $rows[$i];
		//bt
		if ($rows[$i]['tracker_status'])
		{
			if (defined('TORRENT_POST'))
			{
				bb_die('Multiple registered torrents in one topic<br /><br />first torrent found in post_id = '. TORRENT_POST .'<br />current post_id = '. $rows[$i]['post_id'] .'<br /><br />attachments info:<br /><pre style="text-align: left;">'. print_r($rows, TRUE) .'</pre>');
			}
			define('TORRENT_POST', $rows[$i]['post_id']);
		}
		//bt end
	}

	init_display_template('body', '{postrow.ATTACHMENTS}');

	init_complete_extensions_data();
}

/**
* END ATTACHMENT DISPLAY IN POSTS
*/

/**
* Assign Variables and Definitions based on the fetched Attachments - internal
* used by all displaying functions, the Data was collected before, it's only dependend on the template used. :)
* before this function is usable, init_display_attachments have to be called for specific pages (pm, posting, review etc...)
*/
function display_attachments($post_id)
{
	global $template, $upload_dir, $userdata, $allowed_extensions, $display_categories, $download_modes, $lang, $attachments, $upload_icons, $attach_config;

	$num_attachments = @sizeof($attachments['_' . $post_id]);

	if ($num_attachments == 0)
	{
		return;
	}

	$template->assign_block_vars('postrow.attach', array());

	for ($i = 0; $i < $num_attachments; $i++)
	{
		// Some basic things...
		$filename = $upload_dir . '/' . basename($attachments['_' . $post_id][$i]['physical_filename']);
		$thumbnail_filename = $upload_dir . '/' . THUMB_DIR . '/t_' . basename($attachments['_' . $post_id][$i]['physical_filename']);

		// Check the file existence
		// if (!is_file($filename))
		// {
		//	continue;
		// }

		$upload_image = '';

		if ($attach_config['upload_img'] && empty($upload_icons[$attachments['_' . $post_id][$i]['extension']]))
		{
			$upload_image = '<img src="' . $attach_config['upload_img'] . '" alt="" border="0" />';
		}
		else if (trim($upload_icons[$attachments['_' . $post_id][$i]['extension']]) != '')
		{
			$upload_image = '<img src="' . $upload_icons[$attachments['_' . $post_id][$i]['extension']] . '" alt="" border="0" />';
		}

		$filesize = humn_size($attachments['_' . $post_id][$i]['filesize']);

		$display_name = htmlspecialchars($attachments['_' . $post_id][$i]['real_filename']);
		$comment = htmlspecialchars($attachments['_' . $post_id][$i]['comment']);
		$comment = str_replace("\n", '<br />', $comment);

		$denied = false;

		// Admin is allowed to view forbidden Attachments, but the error-message is displayed too to inform the Admin
		if (!in_array($attachments['_' . $post_id][$i]['extension'], $allowed_extensions))
		{
			$denied = true;

			$template->assign_block_vars('postrow.attach.denyrow', array(
				'L_DENIED' => sprintf($lang['EXTENSION_DISABLED_AFTER_POSTING'], $attachments['_' . $post_id][$i]['extension']))
			);
		}

		if (!$denied || IS_ADMIN)
		{
			// define category
			$image = FALSE;
			$thumbnail = FALSE;
			$link = FALSE;

			// Shows the images in topic
			if (@intval($display_categories[$attachments['_' . $post_id][$i]['extension']]) == IMAGE_CAT && intval($attach_config['img_display_inlined']))
			{
				if (intval($attach_config['img_link_width']) != 0 || intval($attach_config['img_link_height']) != 0)
				{
					// Get image sizes
					list($width, $height) = image_getdimension($filename);

					// Check if image sizes is allowed
					if ($width == 0 && $height == 0)
					{
						$image = TRUE;
					}
					else
					{
						if ($width <= intval($attach_config['img_link_width']) && $height <= intval($attach_config['img_link_height']))
						{
							$image = TRUE;
						}
					}
				}
				else
				{
					$image = TRUE;
				}
			}

			// Checks if image is thumbnail
			if (@intval($display_categories[$attachments['_' . $post_id][$i]['extension']]) == IMAGE_CAT && $attachments['_' . $post_id][$i]['thumbnail'] == 1)
			{
				$thumbnail = TRUE;
				$image = FALSE;
			}

			// Checks whether the image should be displayed as a link
			if (!$image && !$thumbnail)
			{
				$link = TRUE;
			}

			if ($image)
			{
				// Images
				if ($attach_config['upload_dir'][0] == '/' || ( $attach_config['upload_dir'][0] != '/' && $attach_config['upload_dir'][1] == ':'))
				{
					$img_source = BB_ROOT . DOWNLOAD_URL . $attachments['_' . $post_id][$i]['attach_id'];
					$download_link = TRUE;
				}
				else
				{
					$img_source = $filename;
					$download_link = FALSE;
				}

				$template->assign_block_vars('postrow.attach.cat_images', array(
					'DOWNLOAD_NAME'  => $display_name,
					'S_UPLOAD_IMAGE' => $upload_image,
					'IMG_SRC'        => $img_source,
					'FILESIZE'       => $filesize,
					'COMMENT'        => $comment,
				));

				// Directly Viewed Image ... update the download count
				if (!$download_link)
				{
					$sql = 'UPDATE ' . BB_ATTACHMENTS_DESC . '
						SET download_count = download_count + 1
						WHERE attach_id = ' . (int) $attachments['_' . $post_id][$i]['attach_id'];

					if (!(DB()->sql_query($sql)))
					{
						bb_die('Could not update attachment download count');
					}
				}
			}

			if ($thumbnail)
			{
				// Images, but display Thumbnail
				if ($attach_config['upload_dir'][0] == '/' || ( $attach_config['upload_dir'][0] != '/' && $attach_config['upload_dir'][1] == ':'))
				{
					$thumb_source = BB_ROOT . DOWNLOAD_URL . $attachments['_' . $post_id][$i]['attach_id'] . '&thumb=1';
				}
				else
				{
					// Checks the thumbnail existence
					// if (!is_file($thumbnail_filename))
					// {
					//	continue;
					// }

					$thumb_source = $thumbnail_filename;
				}

				$template->assign_block_vars('postrow.attach.cat_thumb_images', array(
					'DOWNLOAD_NAME'  => $display_name,
					'S_UPLOAD_IMAGE' => $upload_image,
					'IMG_SRC'        => BB_ROOT . DOWNLOAD_URL . $attachments['_' . $post_id][$i]['attach_id'],
					'IMG_THUMB_SRC'  => $thumb_source,
					'FILESIZE'       => $filesize,
					'COMMENT'        => $comment,
					'DOWNLOAD_COUNT' => declension((int)$attachments['_' . $post_id][$i]['download_count'], 'times'),
				));
			}

			// bt
			if ($link && ($attachments['_'. $post_id][$i]['extension'] === TORRENT_EXT))
			{
				include(ATTACH_DIR .'displaying_torrent.php');
			}
			else if ($link)
			{
				$target_blank = ( (@intval($display_categories[$attachments['_' . $post_id][$i]['extension']]) == IMAGE_CAT) ) ? 'target="_blank"' : '';

				// display attachment
				$template->assign_block_vars('postrow.attach.attachrow', array(
					'U_DOWNLOAD_LINK' => BB_ROOT . DOWNLOAD_URL . $attachments['_' . $post_id][$i]['attach_id'],
					'S_UPLOAD_IMAGE'  => $upload_image,
					'DOWNLOAD_NAME'   => $display_name,
					'FILESIZE'        => $filesize,
					'COMMENT'         => $comment,
					'TARGET_BLANK'    => $target_blank,
					'IS_IMAGE'        => !empty($target_blank), // Проверка на то, что загружаемый файл является картинкой
					'DOWNLOAD_COUNT'  => declension((int)$attachments['_' . $post_id][$i]['download_count'], 'times'),
				));
			}
		}
	}
}
