<?php
	error_reporting(E_ERROR | E_PARSE);

	require_once "../config.php";
	
	require_once "../db.php";
	require_once "../db-prefs.php";
	require_once "../functions.php";

	$link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);	

	$session_expire = SESSION_EXPIRE_TIME; //seconds
	$session_name = (!defined('TTRSS_SESSION_NAME')) ? "ttrss_sid_api" : TTRSS_SESSION_NAME . "_api";

	session_name($session_name);

	if ($_REQUEST["sid"]) {
		session_id($_REQUEST["sid"]);
	}

	session_start();

	if (!$link) {
		if (DB_TYPE == "mysql") {
			print mysql_error();
		}
		// PG seems to display its own errors just fine by default.		
		return;
	}

	init_connection($link);

	$op = db_escape_string($_REQUEST["op"]);

//	header("Content-Type: application/json");

	if (!$_SESSION["uid"] && $op != "login" && $op != "isLoggedIn") {
		print json_encode(array("error" => 'NOT_LOGGED_IN'));
		return;
	}

	if ($_SESSION["uid"] && $op != "logout" && !get_pref($link, 'ENABLE_API_ACCESS')) {
		print json_encode(array("error" => 'API_DISABLED'));
		return;
	} 

	switch ($op) {
		case "getVersion":
			$rv = array("version" => VERSION);
			print json_encode($rv);
		break;
		case "login":
			$login = db_escape_string($_REQUEST["user"]);
			$password = db_escape_string($_REQUEST["password"]);

			$result = db_query($link, "SELECT id FROM ttrss_users WHERE login = '$login'");

			if (db_num_rows($result) != 0) {
				$uid = db_fetch_result($result, 0, "id");
			} else {
				$uid = 0;
			}

			if (get_pref($link, "ENABLE_API_ACCESS", $uid)) {
				if (authenticate_user($link, $login, $password)) {
					print json_encode(array("session_id" => session_id()));
				} else {
					print json_encode(array("error" => "LOGIN_ERROR"));
				}
			} else {
				print json_encode(array("error" => "API_DISABLED"));
			}

			break;
		case "logout":
			logout_user();
			print json_encode(array("status" => "OK"));
			break;
		case "isLoggedIn":
			print json_encode(array("status" => $_SESSION["uid"] != ''));
			break;
		case "getUnread":
			$feed_id = db_escape_string($_REQUEST["feed_id"]);
			$is_cat = db_escape_string($_REQUEST["is_cat"]);

			if ($feed_id) {
				print json_encode(array("unread" => getFeedUnread($link, $feed_id, $is_cat)));
			} else {
				print json_encode(array("unread" => getGlobalUnread($link)));
			}
			break;
		case "getFeeds":
			$cat_id = db_escape_string($_REQUEST["cat_id"]);
			$unread_only = (bool)db_escape_string($_REQUEST["unread_only"]);

			if (!$cat_id) {
				$result = db_query($link, "SELECT 
					id, feed_url, cat_id, title, ".
						SUBSTRING_FOR_DATE."(last_updated,1,19) AS last_updated
						FROM ttrss_feeds WHERE owner_uid = " . $_SESSION["uid"]);
			} else {
				$result = db_query($link, "SELECT 
					id, feed_url, cat_id, title, ".
						SUBSTRING_FOR_DATE."(last_updated,1,19) AS last_updated
						FROM ttrss_feeds WHERE 
							cat_id = '$cat_id' AND owner_uid = " . $_SESSION["uid"]);
			}

			$feeds = array();

			while ($line = db_fetch_assoc($result)) {

				$unread = getFeedUnread($link, $line["id"]);

				if ($unread || !$unread_only) {

					$row = array(
							"feed_url" => $line["feed_url"],
							"title" => $line["title"],
							"id" => (int)$line["id"],
							"unread" => (int)$unread,
							"cat_id" => (int)$line["cat_id"],
							"last_updated" => strtotime($line["last_updated"])
						);
	
					array_push($feeds, $row);
				}
			}

			/* Labels */

			if (!$cat_id || $cat_id == -2) {
				$counters = getLabelCounters($link, false, true);

				foreach (array_keys($counters) as $id) {

					$unread = $counters[$id]["counter"];
	
					if ($unread || !$unread_only) {
	
						$row = array(
								"id" => $id,
								"title" => $counters[$id]["description"],
								"unread" => $counters[$id]["counter"],
								"cat_id" => -2,
							);
	
						array_push($feeds, $row);
					}
				}
			}

			/* Virtual feeds */

			if (!$cat_id || $cat_id == -1) {
				foreach (array(-1, -2, -3, -4) as $i) {
					$unread = getFeedUnread($link, $i);

					if ($unread || !$unread_only) {
						$title = getFeedTitle($link, $i);

						$row = array(
								"id" => $i,
								"title" => $title,
								"unread" => $unread,
								"cat_id" => -1,
							);
						array_push($feeds, $row);
					}

				}
			}

			print json_encode($feeds);

			break;
		case "getCategories":
			$unread_only = (bool)db_escape_string($_REQUEST["unread_only"]);

			$result = db_query($link, "SELECT 
					id, title FROM ttrss_feed_categories 
				WHERE owner_uid = " . 
				$_SESSION["uid"]);

			$cats = array();

			while ($line = db_fetch_assoc($result)) {
				$unread = getFeedUnread($link, $line["id"], true);

				if ($unread || !$unread_only) {
					array_push($cats, array("id" => $line["id"],
						"title" => $line["title"], 
						"unread" => $unread));
				}
			}

			print json_encode($cats);
			break;
		case "getHeadlines":
			$feed_id = db_escape_string($_REQUEST["feed_id"]);
			$limit = (int)db_escape_string($_REQUEST["limit"]);
			$filter = db_escape_string($_REQUEST["filter"]);
			$is_cat = (bool)db_escape_string($_REQUEST["is_cat"]);
			$show_except = (bool)db_escape_string($_REQUEST["show_excerpt"]);

			/* do not rely on params below */

			$search = db_escape_string($_REQUEST["search"]);
			$search_mode = db_escape_string($_REQUEST["search_mode"]);
			$match_on = db_escape_string($_REQUEST["match_on"]);
			
			$qfh_ret = queryFeedHeadlines($link, $feed_id, $limit, 
				$view_mode, $is_cat, $search, $search_mode, $match_on);

			$result = $qfh_ret[0];
			$feed_title = $qfh_ret[1];

			$headlines = array();

			while ($line = db_fetch_assoc($result)) {
				$is_updated = ($line["last_read"] == "" && 
					($line["unread"] != "t" && $line["unread"] != "1"));

				$headline_row = array(
						"id" => (int)$line["id"],
						"unread" => sql_bool_to_bool($line["unread"]),
						"marked" => sql_bool_to_bool($line["marked"]),
						"updated" => strtotime($line["updated"]),
						"is_updated" => $is_updated,
						"title" => $line["title"],
						"feed_id" => $line["feed_id"],
					);

				if ($show_except) $headline_row["excerpt"] = $line["content_preview"];
			
				array_push($headlines, $headline_row);
			}

			print json_encode($headlines);

			break;
		case "updateArticle":
			$article_id = (int) db_escape_string($_GET["article_id"]);
			$mode = (int) db_escape_string($_REQUEST["mode"]);
			$field_raw = (int)db_escape_string($_REQUEST["field"]);

			$field = "";
			$set_to = "";

			switch ($field_raw) {
				case 0:
					$field = "marked";
					break;
				case 1:
					$field = "published";
					break;
				case 2:
					$field = "unread";
					break;
			};

			switch ($mode) {
				case 1:
					$set_to = "true";
					break;
				case 0:
					$set_to = "false";
					break;
				case 2:
					$set_to = "NOT $field";
					break;
			}

			if ($field && $set_to) {
				if ($field == "unread") {
					$result = db_query($link, "UPDATE ttrss_user_entries SET $field = $set_to,
						last_read = NOW()
						WHERE ref_id = '$article_id' AND owner_uid = " . $_SESSION["uid"]);
				} else {
					$result = db_query($link, "UPDATE ttrss_user_entries SET $field = $set_to
						WHERE ref_id = '$article_id' AND owner_uid = " . $_SESSION["uid"]);
				}
			}

			break;

		case "getArticle":

			$article_id = (int)db_escape_string($_REQUEST["article_id"]);

			$query = "SELECT title,link,content,feed_id,comments,int_id,
				marked,unread,published,
				".SUBSTRING_FOR_DATE."(updated,1,16) as updated,
				author
				FROM ttrss_entries,ttrss_user_entries
				WHERE	id = '$article_id' AND ref_id = id AND owner_uid = " . 
					$_SESSION["uid"] ;

			$result = db_query($link, $query);

			$article = array();
			
			if (db_num_rows($result) != 0) {
				$line = db_fetch_assoc($result);
	
				$article = array(
					"title" => $line["title"],
					"link" => $line["link"],
					"labels" => get_article_labels($link, $article_id),
					"unread" => sql_bool_to_bool($line["unread"]),
					"marked" => sql_bool_to_bool($line["marked"]),
					"published" => sql_bool_to_bool($line["published"]),
					"comments" => $line["comments"],
					"author" => $line["author"],
					"updated" => strtotime($line["updated"]),
					"content" => $line["content"],
					"feed_id" => $line["feed_id"],			
				);
			}

			print json_encode($article);

			break;
		case "getConfig":
			$config = array(
				"icons_dir" => ICONS_DIR,
				"icons_url" => ICONS_URL);

			if (ENABLE_UPDATE_DAEMON) {
				$config["daemon_is_running"] = file_is_locked("update_daemon.lock");
			}

			$result = db_query($link, "SELECT COUNT(*) AS cf FROM
				ttrss_feeds WHERE owner_uid = " . $_SESSION["uid"]);

			$num_feeds = db_fetch_result($result, 0, "cf");

			$config["num_feeds"] = (int)$num_feeds;
	
			print json_encode($config);

			break;

		case "updateFeed":
			$feed_id = db_escape_string($_REQUEST["feed_id"]);

			$result = db_query($link, 
				"SELECT feed_url FROM ttrss_feeds WHERE id = '$feed_id'
					AND owner_uid = " . $_SESSION["uid"]);

			if (db_num_rows($result) > 0) {			
				$feed_url = db_fetch_result($result, 0, "feed_url");
				update_rss_feed($link, $feed_url, $feed_id);
			}

			print json_encode(array("status" => "OK"));

			break;

		case "getPref":
			$pref_name = db_escape_string($_REQUEST["pref_name"]);
			print json_encode(array("value" => get_pref($link, $pref_name)));
			break;
	}

	db_close($link);
	
?>