<?php

class Api {


	private $actions, $app, $options;


	public function __construct($app) {

		$this->actions = array("login", "logout", "get", "getThumbHref", "download");
		$this->app = $app;
		$this->options = $app->get_options();
	}


	public function apply() {

		$action = use_request_param("action");
		json_fail(100, "unsupported request", !in_array($action, $this->actions));

		$methodname = "on_${action}";
		$this->$methodname();
	}


	private function on_login() {

		$pass = use_request_param("pass");
		$_SESSION[AS_ADMIN_SESSION_KEY] = sha1($pass) === PASSHASH;
		json_exit(array("as_admin" => $_SESSION[AS_ADMIN_SESSION_KEY]));
	}


	private function on_logout() {

		$_SESSION[AS_ADMIN_SESSION_KEY] = false;
		json_exit(array("as_admin" => $_SESSION[AS_ADMIN_SESSION_KEY]));
	}


	private function on_get() {

		$response = array();

		if (has_request_param("setup")) {

			use_request_param("setup");
			$response["setup"] = $this->app->get_setup();
		}

		if (has_request_param("options")) {

			use_request_param("options");
			$response["options"] = $this->app->get_options();
		}

		if (has_request_param("types")) {

			use_request_param("types");
			$response["types"] = $this->app->get_types();
		}

		if (has_request_param("theme")) {

			use_request_param("theme");
			$response["theme"] = $this->app->get_theme();
		}

		if (has_request_param("langs")) {

			use_request_param("langs");
			$response["langs"] = $this->app->get_l10n_list();
		}

		if (has_request_param("l10n")) {

			use_request_param("l10n");
			$iso_codes = use_request_param("l10nCodes");
			$iso_codes = explode(":", $iso_codes);
			$response["l10n"] = $this->app->get_l10n($iso_codes);
		}

		if (has_request_param("custom")) {

			use_request_param("custom");
			$url = use_request_param("customHref");
			$response["custom"] = $this->app->get_customizations($url);
		}

		if (has_request_param("items")) {

			use_request_param("items");
			$url = use_request_param("itemsHref");
			$what = use_request_param("itemsWhat");
			$what = is_numeric($what) ? intval($what, 10) : 1;
			$response["items"] = $this->app->get_items($url, $what);
		}

		if (has_request_param("all_items")) {

			use_request_param("all_items");
			$response["all_items"] = $this->app->get_all_items();
		}

		if (AS_ADMIN && count($_REQUEST)) {
			$response["unused"] = $_REQUEST;
		}

		json_exit($response);
	}


	private function on_getThumbHref() {

		json_fail(1, "thumbnails disabled", !$this->options["thumbnails"]["enabled"]);
		json_fail(2, "thumbnails not supported", !HAS_PHP_JPG);

		$type = use_request_param("type");
		$src_url = use_request_param("href");
		$mode = use_request_param("mode");
		$width = use_request_param("width");
		$height = use_request_param("height");

		$thumb = new Thumb($this->app);
		$thumb_url = $thumb->thumb($type, $src_url, $mode, $width, $height);
		json_fail(3, "thumbnail creation failed", $thumb_url === null);

		json_exit(array("absHref" => $thumb_url));
	}


	private function on_download() {

		json_fail(1, "downloads disabled", !$this->options["download"]["enabled"]);

		$as = use_request_param("as");
		$type = use_request_param("type");
		$hrefs = use_request_param("hrefs");

		$archive = new Archive($this->app);

		$hrefs = explode("|:|", trim($hrefs));

		set_time_limit(0);
		header("Content-Type: application/octet-stream");
		header("Content-Disposition: attachment; filename=\"$as\"");
		header("Connection: close");
		$rc = $archive->output($type, $hrefs);

		json_fail(2, "packaging failed", $rc !== 0);
		exit;
	}
}