<?php
	require 'info.php';
	
	function index_build($action, $settings, $board) {
		// Possible values for $action:
		//	- all (rebuild everything, initialization)
		//	- news (news has been updated)
		//	- boards (board list changed)
		//	- post (a post has been made)
		//	- post-thread (a thread has been made)
		
		$b = new index();
		$b->build($action, $settings);
	}
	
	// Wrap functions in a class so they don't interfere with normal Tinyboard operations
	class index {
		public function build($action, $settings) {
			global $config, $_theme;
			
			if ($action == 'all') {
				copy('templates/themes/index/' . $settings['basecss'], $config['dir']['home'] . $settings['css']);
			}
			
			
			$this->excluded = explode(' ', $settings['exclude']);
			
			if ($action == 'all' || $action == 'post' || $action == 'post-thread' || $action == 'post-delete') {
				$action = generation_strategy('sb_index', array());
				if ($action == 'delete') {
					file_unlink($config['dir']['home'] . $settings['html']);
			    }
			    elseif ($action == 'rebuild') {
					file_write($config['dir']['home'] . $settings['html'], $this->homepage($settings));
				}
			}
			if ($action == 'all' || $action == 'news' || $action == 'boards'){
				file_write($config['dir']['home'] . $settings['html'], $this->homepage($settings));
			}
		}
			
		
		// Build news page
		public function homepage($settings) {
			global $config, $board;
			
			$recent_images = Array();
			$recent_posts = Array();
			$stats = Array();
			
			$boards = listBoards();
			
			$query = '';
			foreach ($boards as &$_board) {
				if (in_array($_board['uri'], $this->excluded))
					continue;
				$query .= sprintf("SELECT *, '%s' AS `board` FROM ``posts_%s`` WHERE `files` IS NOT NULL UNION ALL ", $_board['uri'], $_board['uri']);
			}
			$query = preg_replace('/UNION ALL $/', 'ORDER BY `time` DESC LIMIT ' . (int)$settings['limit_images'], $query);
			
			if ($query == '') {
				error(_("Can't build the Index theme, because there are no boards to be fetched."));
			}

			$query = query($query) or error(db_error());
			
			while ($post = $query->fetch(PDO::FETCH_ASSOC)) {
				openBoard($post['board']);

				if (isset($post['files']))
					$files = json_decode($post['files']);

                if ($files[0]->file == 'deleted' || $files[0]->thumb == 'file') continue;
				
				// board settings won't be available in the template file, so generate links now
				$post['link'] = $config['root'] . $board['dir'] . $config['dir']['res']
				  . link_for($post) . '#' . $post['id'];

				if ($files) {
					if ($files[0]->thumb == 'spoiler') {
						$tn_size = @getimagesize($config['spoiler_image']);
						$post['src'] = $config['spoiler_image'];
						$post['thumbwidth'] = $tn_size[0];
						$post['thumbheight'] = $tn_size[1];
					}
					else {
						$post['src'] = $config['uri_thumb'] . $files[0]->thumb;
						$post['thumbwidth'] = $files[0]->thumbwidth;
						$post['thumbheight'] = $files[0]->thumbheight;
					}
				}
				
				$recent_images[] = $post;
			}
			
			
			$query = '';
			foreach ($boards as &$_board) {
				if (in_array($_board['uri'], $this->excluded))
					continue;
				$query .= sprintf("SELECT *, '%s' AS `board` FROM ``posts_%s`` UNION ALL ", $_board['uri'], $_board['uri']);
			}
			$query = preg_replace('/UNION ALL $/', 'ORDER BY `time` DESC LIMIT ' . (int)$settings['limit_posts'], $query);
			$query = query($query) or error(db_error());
			
			while ($post = $query->fetch(PDO::FETCH_ASSOC)) {
				openBoard($post['board']);
				
				$post['link'] = $config['root'] . $board['dir'] . $config['dir']['res'] . link_for($post) . '#' . $post['id'];
				if ($post['body'] != "")
					$post['snippet'] = pm_snippet($post['body'], 30);
				else
					$post['snippet'] = "<em>" . _("(no comment)") . "</em>";
				$post['board_name'] = $board['name'];
				
				$recent_posts[] = $post;
			}
			
			// Total posts
			$query = 'SELECT SUM(`top`) FROM (';
			foreach ($boards as &$_board) {
				if (in_array($_board['uri'], $this->excluded))
					continue;
				$query .= sprintf("SELECT MAX(`id`) AS `top` FROM ``posts_%s`` UNION ALL ", $_board['uri']);
			}
			$query = preg_replace('/UNION ALL $/', ') AS `posts_all`', $query);
			$query = query($query) or error(db_error());
			$stats['total_posts'] = number_format($query->fetchColumn());
			
			// Unique IPs
			$query = 'SELECT COUNT(DISTINCT(`ip`)) FROM (';
			foreach ($boards as &$_board) {
				if (in_array($_board['uri'], $this->excluded))
					continue;
				$query .= sprintf("SELECT `ip` FROM ``posts_%s`` UNION ALL ", $_board['uri']);
			}
			$query = preg_replace('/UNION ALL $/', ') AS `posts_all`', $query);
			$query = query($query) or error(db_error());
			$stats['unique_posters'] = number_format($query->fetchColumn());
			
			// Active content
			$query = 'SELECT DISTINCT(`files`) FROM (';
			foreach ($boards as &$_board) {
				if (in_array($_board['uri'], $this->excluded))
					continue;
				$query .= sprintf("SELECT `files` FROM ``posts_%s`` UNION ALL ", $_board['uri']);
			}
			$query = preg_replace('/UNION ALL $/', ' WHERE `num_files` > 0) AS `posts_all`', $query);
			$query = query($query) or error(db_error());
			$files = $query->fetchAll();
			$stats['active_content'] = 0;
			foreach ($files as &$file) {
				preg_match_all('/"size":([0-9]*)/', $file[0], $matches);
				$stats['active_content'] += array_sum($matches[1]);
			}
			
			//news entries
			$settings['no_recent'] = (int) $settings['no_recent'];
			$query = query("SELECT * FROM ``news`` ORDER BY `time` DESC" . ($settings['no_recent'] ? ' LIMIT ' . $settings['no_recent'] : '')) or error(db_error());
			$news = $query->fetchAll(PDO::FETCH_ASSOC);

			// Excluded boards for the boardlist
			$excluded_boards = isset($settings['excludeboardlist']) ? explode(' ', $settings['excludeboardlist']) : [];
			$boardlist = array_filter($boards, function($board) use ($excluded_boards) {
				return !in_array($board['uri'], $excluded_boards);
			});
			
			
			return Element('themes/index/index.html', Array(
				'settings' => $settings,
				'config' => $config,
				'boardlist' => createBoardlist(),
				'recent_images' => $recent_images,
				'recent_posts' => $recent_posts,
				'stats' => $stats,
				'news' => $news,
				'boards' => $boardlist
			));
		}
	};
	
?>