<?php
/**
 * Name: Image Ratings
 * Author: Shish <webmaster@shishnet.org>
 * Link: http://trac.shishnet.org/shimmie2/
 * License: GPLv2
 * Description: Allow users to rate images
 */

class RatingSetEvent extends Event {
	var $image_id, $user, $rating;

	public function RatingSetEvent($image_id, $user, $rating) {
		$this->image_id = $image_id;
		$this->user = $user;
		$this->rating = $rating;
	}
}

class Ratings extends Extension {
	var $theme;

	public function receive_event($event) {
		if(is_null($this->theme)) $this->theme = get_theme_object("rating", "RatingsTheme");

		if(is_a($event, 'InitExtEvent')) {
			global $config;
			if($config->get_int("ext_ratings2_version") < 2) {
				$this->install();
			}

			global $config;
			$config->set_default_string("ext_rating_anon_privs", 'sq');
			$config->set_default_string("ext_rating_user_privs", 'sq');
		}

		# TODO: ImageEditorBuildingEvent
		global $user; // compat with stable
		if(is_a($event, 'PageRequestEvent') && $event->page_name == "rating" &&
				$event->get_arg(0) == "set" && $user->is_admin() &&
				isset($_POST['rating']) && isset($_POST['image_id'])) {
			$i_image_id = int_escape($_POST['image_id']);
			send_event(new RatingSetEvent($i_image_id, $user, $_POST['rating']));
			$event->page->set_mode("redirect");
			$event->page->set_redirect(make_link("post/view/".int_escape($_POST['image_id'])));
		}

		if(is_a($event, 'RatingSetEvent')) {
			$this->set_rating($event->image_id, $event->rating);
		}

		if(is_a($event, 'DisplayingImageEvent')) {
			global $user;
			if($user->is_admin()) {
				$this->theme->display_rater($event->page, $event->image->id, $event->image->rating);
			}
		}
		
		if(is_a($event, 'SetupBuildingEvent')) {
			$privs = array();
			$privs['Safe Only'] = 's';
			$privs['Safe and Questionable'] = 'sq';
			$privs['All'] = 'sqe';

			$sb = new SetupBlock("Image Ratings");
			$sb->add_choice_option("ext_rating_anon_privs", $privs, "Anonymous: ");
			$sb->add_choice_option("ext_rating_user_privs", $privs, "<br>Logged in: ");
			$event->panel->add_block($sb);
		}
	}

	private function install() {
		global $database;
		global $config;

		if($config->get_int("ext_ratings2_version") < 1) {
			$database->Execute("ALTER TABLE images ADD COLUMN rating ENUM('s', 'q', 'e') NOT NULL DEFAULT 'q'");
			$config->set_int("ext_ratings2_version", 1);
		}

		if($config->get_int("ext_ratings2_version") < 2) {
			$database->Execute("CREATE INDEX images__rating ON images(rating)");
			$config->set_int("ext_ratings2_version", 2);
		}
	}

	private function set_rating($image_id, $rating) {
		global $database;
		$database->Execute("UPDATE images SET rating=? WHERE id=?", array($rating, $image_id));
	}
}
add_event_listener(new Ratings());
?>