<?php
/*
 * Name: Logging (Database)
 * Author: Shish <webmaster@shishnet.org>
 * Link: http://code.shishnet.org/shimmie2/
 * Description: Keep a record of SCore events (in the database).
 * Visibility: admin
 */

class LogDatabase extends Extension {
	public function onInitExt(InitExtEvent $event) {
		global $database;
		global $config;

		if($config->get_int("ext_log_database_version") < 1) {
			$database->create_table("score_log", "
				id SCORE_AIPK,
				date_sent SCORE_DATETIME NOT NULL,
				section VARCHAR(32) NOT NULL,
				username VARCHAR(32) NOT NULL,
				address SCORE_INET NOT NULL,
				priority INT NOT NULL,
				message TEXT NOT NULL
			");
				//INDEX(section)
			$config->set_int("ext_log_database_version", 1);
		}

		$config->set_default_int("log_db_priority", SCORE_LOG_INFO);
	}

	public function onSetupBuilding(SetupBuildingEvent $event) {
		$sb = new SetupBlock("Logging (Database)");
		$sb->add_choice_option("log_db_priority", array(
			"Debug" => SCORE_LOG_DEBUG,
			"Info" => SCORE_LOG_INFO,
			"Warning" => SCORE_LOG_WARNING,
			"Error" => SCORE_LOG_ERROR,
			"Critical" => SCORE_LOG_CRITICAL,
		), "Debug Level: ");
		$event->panel->add_block($sb);
	}

	public function onPageRequest(PageRequestEvent $event) {
		global $database, $user;
		if($event->page_matches("log/view")) {
			if($user->can("view_eventlog")) {
				$wheres = array();
				$args = array();
				$page_num = int_escape($event->get_arg(0));
				if($page_num <= 0) $page_num = 1;
				if(!empty($_GET["time"])) {
					$wheres[] = "date_sent LIKE :time";
					$args["time"] = $_GET["time"]."%";
				}
				if(!empty($_GET["module"])) {
					$wheres[] = "section = :module";
					$args["module"] = $_GET["module"];
				}
				if(!empty($_GET["user"])) {
					if($database->get_driver_name() == "pgsql") {
						if(preg_match("#\d+\.\d+\.\d+\.\d+(/\d+)?#", $_GET["user"])) {
							$wheres[] = "(username = :user1 OR text(address) = :user2)";
							$args["user1"] = $_GET["user"];
							$args["user2"] = $_GET["user"] . "/32";
						}
						else {
							$wheres[] = "lower(username) = lower(:user)";
							$args["user"] = $_GET["user"];
						}
					}
					else {
						$wheres[] = "(username = :user1 OR address = :user2)";
						$args["user1"] = $_GET["user"];
						$args["user2"] = $_GET["user"];
					}
				}
				if(!empty($_GET["priority"])) {
					$wheres[] = "priority >= :priority";
					$args["priority"] = int_escape($_GET["priority"]);
				}
				else {
					$wheres[] = "priority >= :priority";
					$args["priority"] = 20;
				}
				$where = "";
				if(count($wheres) > 0) {
					$where = "WHERE ";
					$where .= join(" AND ", $wheres);
				}

				$limit = 50;
				$offset = ($page_num-1) * $limit;
				$page_total = $database->cache->get("event_log_length");
				if(!$page_total) {
					$page_total = $database->get_one("SELECT count(*) FROM score_log $where", $args);
					// don't cache a length of zero when the extension is first installed
					if($page_total > 10) {
						$database->cache->set("event_log_length", 600);
					}
				}

				$args["limit"] = $limit;
				$args["offset"] = $offset;
				$events = $database->get_all("SELECT * FROM score_log $where ORDER BY id DESC LIMIT :limit OFFSET :offset", $args);

				$this->theme->display_events($events, $page_num, 100);
			}
		}
	}

	public function onUserBlockBuilding(UserBlockBuildingEvent $event) {
		global $user;
		if($user->can("view_eventlog")) {
			$event->add_link("Event Log", make_link("log/view"));
		}
	}

	public function onLog(LogEvent $event) {
		global $config, $database, $user;

		$username = ($user && $user->name) ? $user->name : "null";

		// not installed yet...
		if($config->get_int("ext_log_database_version") < 1) return;

		if($event->priority >= $config->get_int("log_db_priority")) {
			$database->execute("
				INSERT INTO score_log(date_sent, section, priority, username, address, message)
				VALUES(now(), :section, :priority, :username, :address, :message)
			", array(
				"section"=>$event->section, "priority"=>$event->priority, "username"=>$username,
				"address"=>$_SERVER['REMOTE_ADDR'], "message"=>$event->message
			));
		}
	}
}
?>
