<?php
/*
 * SearchTermParseEvent:
 * Signal that a search term needs parsing
 */
class SearchTermParseEvent extends Event {
	var $term = null;
	var $context = null;
	var $querylets = array();

	public function SearchTermParseEvent($term, $context) {
		$this->term = $term;
		$this->context = $context;
	}

	public function is_querylet_set() {
		return (count($this->querylets) > 0);
	}

	public function get_querylets() {
		return $this->querylets;
	}

	public function add_querylet($q) {
		$this->querylets[] = $q;
	}
}

class PostListBuildingEvent extends Event {
	var $search_terms = null;

	public function __construct($search) {
		$this->search_terms = $search;
	}
}

class Index extends SimpleExtension {
	public function onInitExt($event) {
		global $config;
		$config->set_default_int("index_width", 3);
		$config->set_default_int("index_height", 4);
		$config->set_default_bool("index_tips", true);
	}

	public function onPageRequest($event) {
		global $config, $database, $page, $user;
		if($event->page_matches("post/list")) {
			if(isset($_GET['search'])) {
				$search = url_escape(trim($_GET['search']));
				if(empty($search)) {
					$page->set_mode("redirect");
					$page->set_redirect(make_link("post/list/1"));
				}
				else {
					$page->set_mode("redirect");
					$page->set_redirect(make_link("post/list/$search/1"));
				}
				return;
			}

			$search_terms = array();
			$page_number = 1;

			if($event->count_args() == 1) {
				$page_number = int_escape($event->get_arg(0));
			}
			else if($event->count_args() == 2) {
				$search_terms = explode(' ', $event->get_arg(0));
				$page_number = int_escape($event->get_arg(1));
			}

			if($page_number == 0) $page_number = 1; // invalid -> 0

			$total_pages = Image::count_pages($search_terms);
			$count = $config->get_int('index_width') * $config->get_int('index_height');
			$images = Image::find_images(($page_number-1)*$count, $count, $search_terms);

			if(count($search_terms) == 0 && count($images) == 0 && $page_number == 1) {
				$this->theme->display_intro($page);
				send_event(new PostListBuildingEvent($search_terms));
			}
			else if(count($search_terms) > 0 && count($images) == 1) {
				$page->set_mode("redirect");
				$page->set_redirect(make_link("post/view/{$images[0]->id}"));
			}
			else {
				send_event(new PostListBuildingEvent($search_terms));

				$this->theme->set_page($page_number, $total_pages, $search_terms);
				$this->theme->display_page($page, $images);
			}
		}
	}

	public function onSetupBuilding($event) {
		$sb = new SetupBlock("Index Options");
		$sb->position = 20;

		$sb->add_label("Index table size ");
		$sb->add_int_option("index_width");
		$sb->add_label(" x ");
		$sb->add_int_option("index_height");
		$sb->add_label(" images");

		$event->panel->add_block($sb);
	}

	public function onSearchTermParse($event) {
		$matches = array();
		if(preg_match("/^size(<|>|<=|>=|=)(\d+)x(\d+)$/", $event->term, $matches)) {
			$cmp = $matches[1];
			$args = array(int_escape($matches[2]), int_escape($matches[3]));
			$event->add_querylet(new Querylet("width $cmp ? AND height $cmp ?", $args));
		}
		else if(preg_match("/^ratio(<|>|<=|>=|=)(\d+):(\d+)$/", $event->term, $matches)) {
			$cmp = $matches[1];
			$args = array(int_escape($matches[2]), int_escape($matches[3]));
			$event->add_querylet(new Querylet("width / height $cmp ? / ?", $args));
		}
		else if(preg_match("/^(filesize|id)(<|>|<=|>=|=)(\d+[kmg]?b?)$/i", $event->term, $matches)) {
			$col = $matches[1];
			$cmp = $matches[2];
			$val = parse_shorthand_int($matches[3]);
			$event->add_querylet(new Querylet("images.$col $cmp ?", array($val)));
		}
		else if(preg_match("/^hash=([0-9a-fA-F]*)$/i", $event->term, $matches)) {
			$hash = strtolower($matches[2]);
			$event->add_querylet(new Querylet("images.hash = '$hash'"));
		}
		else if(preg_match("/^(filetype|ext)=([a-zA-Z0-9]*)$/i", $event->term, $matches)) {
			$ext = strtolower($matches[2]);
			$event->add_querylet(new Querylet("images.ext = '$ext'"));
		}
		else if(preg_match("/^(filename|name)=([a-zA-Z0-9]*)$/i", $event->term, $matches)) {
			$filename = strtolower($matches[2]);
			$event->add_querylet(new Querylet("images.filename LIKE '%$filename%'"));
		}
		else if(preg_match("/^posted=(([0-9\*]*)?(-[0-9\*]*)?(-[0-9\*]*)?)$/", $event->term, $matches)) {
			$val = str_replace("*", "%", $matches[1]);
			$img_search->append(new Querylet("images.posted LIKE '%$val%'"));
		}
	}
}
?>