]> git.wh0rd.org - tt-rss.git/blobdiff - backend.php
experimental split of public calls into public.php (refs #389)
[tt-rss.git] / backend.php
index a2a87cafd69126d0baa458c80513fb5353faa76a..c702c9fb8a0ea76dba1098b278fd367929da666b 100644 (file)
 <?php
-       error_reporting(E_ERROR | E_WARNING | E_PARSE);
-
        /* remove ill effects of magic quotes */
 
        if (get_magic_quotes_gpc()) {
-               $_GET = array_map('stripslashes', $_GET);
-               $_POST = array_map('stripslashes', $_POST);
-               $_REQUEST = array_map('stripslashes', $_REQUEST);
-               $_COOKIE = array_map('stripslashes', $_COOKIE);
-       }
-
-       require_once "sessions.php";
-       require_once "modules/backend-rpc.php";
+               function stripslashes_deep($value) {
+                       $value = is_array($value) ?
+                               array_map('stripslashes_deep', $value) : stripslashes($value);
+                               return $value;
+               }
 
-/*     if ($_GET["debug"]) {
-               define('DEFAULT_ERROR_LEVEL', E_ALL);
-       } else {
-               define('DEFAULT_ERROR_LEVEL', E_ERROR | E_WARNING | E_PARSE);
+               $_POST = array_map('stripslashes_deep', $_POST);
+               $_GET = array_map('stripslashes_deep', $_GET);
+               $_COOKIE = array_map('stripslashes_deep', $_COOKIE);
+               $_REQUEST = array_map('stripslashes_deep', $_REQUEST);
        }
-       
-       error_reporting(DEFAULT_ERROR_LEVEL); */
 
+       $op = $_REQUEST["op"];
+
+       require_once "functions.php";
+       if ($op != "share") require_once "sessions.php";
+       require_once "modules/backend-rpc.php";
        require_once "sanity_check.php";
        require_once "config.php";
-       
        require_once "db.php";
        require_once "db-prefs.php";
-       require_once "functions.php";
 
        no_cache_incantation();
 
-       if (ENABLE_TRANSLATIONS == true) { 
-               startup_gettext();
-       }
+       startup_gettext();
 
        $script_started = getmicrotime();
 
-       $link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME); 
+       $link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);
 
        if (!$link) {
                if (DB_TYPE == "mysql") {
                        print mysql_error();
                }
-               // PG seems to display its own errors just fine by default.             
+               // PG seems to display its own errors just fine by default.
                return;
        }
 
        init_connection($link);
 
-       $op = $_REQUEST["op"];
+       $subop = $_REQUEST["subop"];
        $mode = $_REQUEST["mode"];
 
-       $print_exec_time = false;
-
-       if ((!$op || $op == "rpc" || $op == "rss" || 
-                       ($op == "view" && $mode != "zoom") || 
-                       $op == "digestSend" || $op == "viewfeed" || $op == "publish" ||
-                       $op == "globalUpdateFeeds") && !$_REQUEST["noxml"]) {
-                               header("Content-Type: application/xml; charset=utf-8");
-
-                               if (ENABLE_GZIP_OUTPUT) {
-                                       ob_start("ob_gzhandler");
-                               }
-                               
-               } else {
-               if (!$_REQUEST["noxml"]) {
-                       header("Content-Type: text/html; charset=utf-8");
-               } else {
+       if ((!$op || $op == "rss" || $op == "dlg") && !$_REQUEST["noxml"]) {
+                       header("Content-Type: application/xml; charset=utf-8");
+       } else {
                        header("Content-Type: text/plain; charset=utf-8");
-               }
        }
 
-       if (!$op) {
-               header("Content-Type: application/xml");
-               print_error_xml(7); exit;
+       if (ENABLE_GZIP_OUTPUT) {
+               ob_start("ob_gzhandler");
+       }
+
+       if (SINGLE_USER_MODE) {
+               authenticate_user($link, "admin", null);
        }
-       
-       if (!($_SESSION["uid"] && validate_session($link)) && $op != "globalUpdateFeeds" 
-                       && $op != "rss" && $op != "getUnread" && $op != "publish") {
 
-               if ($op == "rpc" || $op == "viewfeed" || $op == "view") {
-                       print_error_xml(6); die;
+       $public_calls = array("globalUpdateFeeds", "rss", "getUnread", "getProfiles", "share",
+               "fbexport", "logout", "pubsub");
+
+       if (array_search($op, $public_calls) !== false) {
+
+               handle_public_request($link, $op);
+               return;
+
+       } else if (!($_SESSION["uid"] && validate_session($link))) {
+               if ($op == 'pref-feeds' && $_REQUEST['subop'] == 'add') {
+                       header("Content-Type: text/html");
+                       login_sequence($link);
+                       render_login_form($link);
                } else {
-                       print "
-                       <html><body>
-                               <p>Error: Not logged in.</p>
-                               <script type=\"text/javascript\">
-                                       if (parent.window != 'undefined') {
-                                               parent.window.location = \"tt-rss.php\";                
-                                       } else {
-                                               window.location = \"tt-rss.php\";
-                                       }
-                               </script>
-                       </body></html>
-                       ";
+                       header("Content-Type: text/plain");
+                       print json_encode(array("error" => array("code" => 6)));
                }
-               exit;
+               return;
        }
 
        $purge_intervals = array(
                1440 => __("Daily"),
                10080 => __("Weekly"));
 
+       $update_intervals_nodefault = array(
+               -1  => __("Disable updates"),
+               15  => __("Each 15 minutes"),
+               30  => __("Each 30 minutes"),
+               60  => __("Hourly"),
+               240 => __("Each 4 hours"),
+               720 => __("Each 12 hours"),
+               1440 => __("Daily"),
+               10080 => __("Weekly"));
+
        $update_methods = array(
                0   => __("Default"),
                1   => __("Magpie"),
-               2   => __("SimplePie"));
+               2   => __("SimplePie"),
+               3   => __("Twitter OAuth"));
 
-       if (ENABLE_SIMPLEPIE) {
+       if (DEFAULT_UPDATE_METHOD == "1") {
                $update_methods[0] .= ' (SimplePie)';
        } else {
                $update_methods[0] .= ' (Magpie)';
        }
 
        $access_level_names = array(
-               0 => __("User"), 
+               0 => __("User"),
                5 => __("Power User"),
                10 => __("Administrator"));
 
        require_once "modules/pref-filters.php";
        require_once "modules/pref-labels.php";
        require_once "modules/pref-users.php";
-       require_once "modules/pref-feed-browser.php"; 
+       require_once "modules/pref-instances.php";
 
-       if (!sanity_check($link)) { return; }
+       $error = sanity_check($link);
+
+       if ($error['code'] != 0 && $op != "logout") {
+               print json_encode(array("error" => $error));
+               return;
+       }
 
        switch($op) { // Select action according to $op value.
                case "rpc":
                break; // rpc
 
                case "feeds":
-                       if (ENABLE_GZIP_OUTPUT) {
-                               ob_start("ob_gzhandler");
-                       }
-
-                       $tags = $_GET["tags"];
-
-                       $subop = $_GET["subop"];
+                       $subop = $_REQUEST["subop"];
+                       $root = (bool)$_REQUEST["root"];
 
                        switch($subop) {
                                case "catchupAll":
-                                       db_query($link, "UPDATE ttrss_user_entries SET 
+                                       db_query($link, "UPDATE ttrss_user_entries SET
                                                last_read = NOW(),unread = false WHERE owner_uid = " . $_SESSION["uid"]);
                                        ccache_zero_all($link, $_SESSION["uid"]);
 
                                break;
 
                                case "collapse":
-                                       $cat_id = db_escape_string($_GET["cid"]);
-
-                                       db_query($link, "UPDATE ttrss_feed_categories SET
-                                               collapsed = NOT collapsed WHERE id = '$cat_id' AND owner_uid = " . 
-                                               $_SESSION["uid"]);
-                                       return;
-                               break;
-
-                               case "catsortreset":
-                                       db_query($link, "UPDATE ttrss_feed_categories 
-                                                       SET order_id = 0 WHERE owner_uid = " . $_SESSION["uid"]);
+                                       $cat_id = db_escape_string($_REQUEST["cid"]);
+                                       $mode = (int) db_escape_string($_REQUEST['mode']);
+                                       toggle_collapse_cat($link, $cat_id, $mode);
                                        return;
                                break;
+                       }
 
-                               case "catsort":
-                                       $corder = db_escape_string($_GET["corder"]);
-
-                                       $cats = split(",", $corder);
+                       if (!$root) {
+                               print json_encode(outputFeedList($link));
+                       } else {
 
-                                       for ($i = 0; $i < count($cats); $i++) {
-                                               $cat_id = $cats[$i];
+                               $feeds = outputFeedList($link, false);
 
-                                               if ($cat_id > 0) {
-                                                       db_query($link, "UPDATE ttrss_feed_categories 
-                                                               SET order_id = '$i' WHERE id = '$cat_id' AND
-                                                               owner_uid = " . $_SESSION["uid"]);
-                                               }
-                                       }
+                               $root = array();
+                               $root['id'] = 'root';
+                               $root['name'] = __('Feeds');
+                               $root['items'] = $feeds['items'];
 
-                                       return;
-                               break;
+                               $fl = array();
+                               $fl['identifier'] = 'id';
+                               $fl['label'] = 'name';
+                               $fl['items'] = array($root);
 
+                               print json_encode($fl);
                        }
 
-                       outputFeedList($link, $tags);
                break; // feeds
 
-               case "view":
+               case "la":
+                       $id = db_escape_string($_REQUEST['id']);
+
+                       $result = db_query($link, "SELECT link FROM ttrss_entries, ttrss_user_entries
+                               WHERE id = '$id' AND id = ref_id AND owner_uid = '".$_SESSION['uid']."'
+                               LIMIT 1");
+
+                       if (db_num_rows($result) == 1) {
+                               $article_url = db_fetch_result($result, 0, 'link');
+                               $article_url = str_replace("\n", "", $article_url);
 
-                       $id = db_escape_string($_GET["id"]);
-                       $feed_id = db_escape_string($_GET["feed"]);
-                       $cids = split(",", db_escape_string($_GET["cids"]));
-                       $mode = db_escape_string($_GET["mode"]);
-                       $omode = db_escape_string($_GET["omode"]);
+                               header("Location: $article_url");
+                               return;
 
-                       $csync = $_GET["csync"];
+                       } else {
+                               print_error(__("Article not found."));
+                       }
+               break;
+
+               case "view":
 
-                       print "<reply>";
+                       $id = db_escape_string($_REQUEST["id"]);
+                       $cids = explode(",", db_escape_string($_REQUEST["cids"]));
+                       $mode = db_escape_string($_REQUEST["mode"]);
+                       $omode = db_escape_string($_REQUEST["omode"]);
 
-                       // in prefetch mode we only output requested cids, main article 
+                       // in prefetch mode we only output requested cids, main article
                        // just gets marked as read (it already exists in client cache)
 
+                       $articles = array();
+
                        if ($mode == "") {
-                               outputArticleXML($link, $id, $feed_id);
+                               array_push($articles, format_article($link, $id, false));
                        } else if ($mode == "zoom") {
-                               outputArticleXML($link, $id, $feed_id, true, true);
-                       } else {
-                               catchupArticleById($link, $id, 0);
-                               ccache_update($link, $feed_id, $_SESSION["uid"]);
+                               array_push($articles, format_article($link, $id, true, true));
+                       } else if ($mode == "raw") {
+                               if ($_REQUEST['html']) {
+                                       header("Content-Type: text/html");
+                                       print '<link rel="stylesheet" type="text/css" href="tt-rss.css"/>';
+                               }
+
+                               $article = format_article($link, $id, false);
+                               print $article['content'];
+                               return;
                        }
 
+                       catchupArticleById($link, $id, 0);
+
                        if (!$_SESSION["bw_limit"]) {
                                foreach ($cids as $cid) {
                                        if ($cid) {
-                                               outputArticleXML($link, $cid, $feed_id, false);
+                                               array_push($articles, format_article($link, $cid, false, false));
                                        }
                                }
                        }
 
-//                     if (get_pref($link, "SYNC_COUNTERS") || ($mode == "prefetch" && $csync)) {
-
-                       if (time() - $_SESSION["view:counters_stamp"] > 3 && $mode == "prefetch") {
-                               print "<counters>";
-                               getAllCounters($link, $omode);
-                               print "</counters>";
-                               $_SESSION["view:counters_stamp"] = time();
-                       }
+                       print json_encode($articles);
 
-                       print "</reply>";
                break; // view
 
                case "viewfeed":
 
-                       $print_exec_time = true;
                        $timing_info = getmicrotime();
 
-                       print "<reply>";
+                       $reply = array();
+
+                       if ($_REQUEST["debug"]) $timing_info = print_checkpoint("0", $timing_info);
+
+                       $omode = db_escape_string($_REQUEST["omode"]);
 
-                       if ($_GET["debug"]) $timing_info = print_checkpoint("0", $timing_info);
+                       $feed = db_escape_string($_REQUEST["feed"]);
+                       $subop = db_escape_string($_REQUEST["subop"]);
+                       $view_mode = db_escape_string($_REQUEST["view_mode"]);
+                       $limit = (int) get_pref($link, "DEFAULT_ARTICLE_LIMIT");
+                       @$cat_view = db_escape_string($_REQUEST["cat"]) == "true";
+                       @$next_unread_feed = db_escape_string($_REQUEST["nuf"]);
+                       @$offset = db_escape_string($_REQUEST["skip"]);
+                       @$vgroup_last_feed = db_escape_string($_REQUEST["vgrlf"]);
+                       $order_by = db_escape_string($_REQUEST["order_by"]);
 
-                       $omode = db_escape_string($_GET["omode"]);
+                       if (is_numeric($feed)) $feed = (int) $feed;
 
-                       $feed = db_escape_string($_GET["feed"]);
-                       $subop = db_escape_string($_GET["subop"]);
-                       $view_mode = db_escape_string($_GET["view_mode"]);
-                       $limit = db_escape_string($_GET["limit"]);
-                       $cat_view = db_escape_string($_GET["cat"]);
-                       $next_unread_feed = db_escape_string($_GET["nuf"]);
-                       $offset = db_escape_string($_GET["skip"]);
-                       $vgroup_last_feed = db_escape_string($_GET["vgrlf"]);
-                       $csync = $_GET["csync"];
-                       $order_by = db_escape_string($_GET["order_by"]);
+                       /* Feed -5 is a special case: it is used to display auxiliary information
+                        * when there's nothing to load - e.g. no stuff in fresh feed */
+
+                       if ($feed == -5) {
+                               print json_encode(generate_dashboard_feed($link));
+                               return;
+                       }
+
+                       $result = false;
+
+                       if ($feed < -10) {
+                               $label_feed = -11-$feed;
+                               $result = db_query($link, "SELECT id FROM ttrss_labels2 WHERE
+                                       id = '$label_feed' AND owner_uid = " . $_SESSION['uid']);
+                       } else if (!$cat_view && is_numeric($feed) && $feed > 0) {
+                               $result = db_query($link, "SELECT id FROM ttrss_feeds WHERE
+                                       id = '$feed' AND owner_uid = " . $_SESSION['uid']);
+                       } else if ($cat_view && is_numeric($feed) && $feed > 0) {
+                               $result = db_query($link, "SELECT id FROM ttrss_feed_categories WHERE
+                                       id = '$feed' AND owner_uid = " . $_SESSION['uid']);
+                       }
+
+                       if ($result && db_num_rows($result) == 0) {
+                               print json_encode(generate_error_feed($link, __("Feed not found.")));
+                               return;
+                       }
 
                        /* Updating a label ccache means recalculating all of the caches
                         * so for performance reasons we don't do that here */
 
-                       if (time() - $_SESSION["viewfeed:ccache_update_stamp"] > 120) {
-                               if ($feed >= 0) {
-                                       ccache_update($link, $feed, $_SESSION["uid"], $cat_view);
-                               }
-                               $_SESSION["viewfeed:ccache_update_stamp"] = time();
+                       if ($feed >= 0) {
+                               ccache_update($link, $feed, $_SESSION["uid"], $cat_view);
                        }
 
                        set_pref($link, "_DEFAULT_VIEW_MODE", $view_mode);
                                        WHERE id = '$feed' AND owner_uid = ".$_SESSION["uid"]);
                        }
 
-                       if (!$next_unread_feed) {
-                               print "<headlines id=\"$feed\" is_cat=\"$cat_view\"><![CDATA[";
+                       $reply['headlines'] = array();
+
+                       if (!$next_unread_feed)
+                               $reply['headlines']['id'] = $feed;
+                       else
+                               $reply['headlines']['id'] = $next_unread_feed;
+
+                       $reply['headlines']['is_cat'] = (bool) $cat_view;
+
+                       $override_order = false;
+
+                       if (get_pref($link, "SORT_HEADLINES_BY_FEED_DATE", $owner_uid)) {
+                               $date_sort_field = "updated";
                        } else {
-                               print "<headlines id=\"$next_unread_feed\" is_cat=\"$cat_view\"><![CDATA[";
+                               $date_sort_field = "date_entered";
                        }
-               
-                       $override_order = false;
 
                        switch ($order_by) {
                                case "date":
                                        if (get_pref($link, 'REVERSE_HEADLINES', $owner_uid)) {
-                                               $override_order = "updated";
-                                       } else {        
-                                               $override_order = "updated DESC";
+                                               $override_order = "$date_sort_field";
+                                       } else {
+                                               $override_order = "$date_sort_field DESC";
                                        }
                                        break;
 
                                case "title":
-                                       $override_order = "updated DESC";
+                                       if (get_pref($link, 'REVERSE_HEADLINES', $owner_uid)) {
+                                               $override_order = "title DESC, $date_sort_field";
+                                       } else {
+                                               $override_order = "title, $date_sort_field DESC";
+                                       }
                                        break;
 
                                case "score":
-                                       $override_order = "score DESC";
+                                       if (get_pref($link, 'REVERSE_HEADLINES', $owner_uid)) {
+                                               $override_order = "score, $date_sort_field";
+                                       } else {
+                                               $override_order = "score DESC, $date_sort_field DESC";
+                                       }
                                        break;
                        }
 
-                       $ret = outputHeadlinesList($link, $feed, $subop, 
-                               $view_mode, $limit, $cat_view, $next_unread_feed, $offset, 
+                       if ($_REQUEST["debug"]) $timing_info = print_checkpoint("04", $timing_info);
+
+                       $ret = format_headlines_list($link, $feed, $subop,
+                               $view_mode, $limit, $cat_view, $next_unread_feed, $offset,
                                $vgroup_last_feed, $override_order);
 
                        $topmost_article_ids = $ret[0];
                        $disable_cache = $ret[3];
                        $vgroup_last_feed = $ret[4];
 
-                       print "]]></headlines>";
-
-                       print "<headlines-count value=\"$headlines_count\"/>";
-                       print "<vgroup-last-feed value=\"$vgroup_last_feed\"/>";
+//                     if ($_REQUEST["debug"]) print_r($ret);
 
-                       $headlines_unread = ccache_find($link, $returned_feed, $_SESSION["uid"],
-                                       $cat_view, true);
+                       $reply['headlines']['content'] =& $ret[5]['content'];
+                       $reply['headlines']['toolbar'] =& $ret[5]['toolbar'];
 
-                       if ($headlines_unread == -1) {
-                               $headlines_unread = getFeedUnread($link, $returned_feed, $cat_view);
-
-                       }
+                       if ($_REQUEST["debug"]) $timing_info = print_checkpoint("05", $timing_info);
 
-                       print "<headlines-unread value=\"$headlines_unread\"/>";
-                       printf("<disable-cache value=\"%d\"/>", $disable_cache);
+                       $reply['headlines-info'] = array("count" => (int) $headlines_count,
+                               "vgroup_last_feed" => $vgroup_last_feed,
+                               "disable_cache" => (bool) $disable_cache);
 
-                       if ($_GET["debug"]) $timing_info = print_checkpoint("10", $timing_info);
+                       if ($_REQUEST["debug"]) $timing_info = print_checkpoint("20", $timing_info);
 
                        if (is_array($topmost_article_ids) && !get_pref($link, 'COMBINED_DISPLAY_MODE') && !$_SESSION["bw_limit"]) {
-                               print "<articles>";
+                               $articles = array();
+
                                foreach ($topmost_article_ids as $id) {
-                                       outputArticleXML($link, $id, $feed, false);
+                                       array_push($articles, format_article($link, $id, false));
                                }
-                               print "</articles>";
-                       }
-
-                       if ($_GET["debug"]) $timing_info = print_checkpoint("20", $timing_info);
 
+                               $reply['articles'] = $articles;
+                       }
 
-//                     if (get_pref($link, "SYNC_COUNTERS") ||                         
-//                                     time() - $_SESSION["get_all_counters_stamp"] > $viewfeed_ctr_interval) {
-//                             print "<counters>";
-//                             getAllCounters($link, $omode, $feed);
-//                             print "</counters>";
+//                     if ($subop) {
+//                             $reply['counters'] = getAllCounters($link, $omode, $feed);
 //                     }
 
-                       if (get_pref($link, 'COMBINED_DISPLAY_MODE') || $subop || 
-                               time() - $_SESSION["viewfeed:counters_stamp"] > 60) {
-                               if (!$offset) {
-                                       print "<counters>";
-                                       getAllCounters($link, $omode, $feed);
-                                       print "</counters>";
-                                       $_SESSION["viewfeed:counters_stamp"] = time();
-                               }
-                       }
+                       if ($_REQUEST["debug"]) $timing_info = print_checkpoint("30", $timing_info);
 
-                       if ($_GET["debug"]) $timing_info = print_checkpoint("30", $timing_info);
+                       $reply['runtime-info'] = make_runtime_info($link);
 
-                       print_runtime_info($link);
+                       print json_encode($reply);
 
-                       print "</reply>";
                break; // viewfeed
 
                case "pref-feeds":
                        module_pref_pub_items($link);
                break; // pref-pub-items
 
-               case "globalUpdateFeeds":
-                       // update feeds of all users, may be used anonymously
-
-                       print "<!--";
-                       // Update all feeds needing a update.
-                       update_daemon_common($link, 0, true, true);
-                       print " -->";
-
-                       print "<rpc-reply>
-                               <message msg=\"All feeds updated\"/>
-                       </rpc-reply>";
-               break; // globalUpdateFeeds
-
                case "pref-feed-browser":
                        module_pref_feed_browser($link);
                break; // pref-feed-browser
 
-               case "publish":
-                       $key = db_escape_string($_GET["key"]);
-                       $limit = (int)db_escape_string($_GET["limit"]);
-
-                       $result = db_query($link, "SELECT login, owner_uid 
-                               FROM ttrss_user_prefs, ttrss_users WHERE
-                               pref_name = '_PREFS_PUBLISH_KEY' AND 
-                               value = '$key' AND 
-                               ttrss_users.id = owner_uid");
-
-                       if (db_num_rows($result) == 1) {
-                               $owner = db_fetch_result($result, 0, "owner_uid");
-                               $login = db_fetch_result($result, 0, "login");
-
-                               generate_syndicated_feed($link, $owner, -2, false, $limit);
-
-                       } else {
-                               print "<error>User not found</error>";
-                       }
-               break; // publish
-
-               case "rss":
-                       $feed = db_escape_string($_GET["id"]);
-                       $user = db_escape_string($_GET["user"]);
-                       $pass = db_escape_string($_GET["pass"]);
-                       $is_cat = $_GET["is_cat"] != false;
-                       $limit = (int)db_escape_string($_GET["limit"]);
-
-                       $search = db_escape_string($_GET["q"]);
-                       $match_on = db_escape_string($_GET["m"]);
-                       $search_mode = db_escape_string($_GET["smode"]);
-
-                       if (!$_SESSION["uid"] && $user && $pass) {
-                               authenticate_user($link, $user, $pass);
-                       }
-
-                       if ($_SESSION["uid"] ||
-                               http_authenticate_user($link)) {
-
-                                       generate_syndicated_feed($link, 0, $feed, $is_cat, $limit,
-                                               $search, $search_mode, $match_on);
-                       }
-               break; // rss
-
-               case "getUnread":
-                       $login = db_escape_string($_GET["login"]);
-
-                       header("Content-Type: text/plain; charset=utf-8");
-
-                       $result = db_query($link, "SELECT id FROM ttrss_users WHERE login = '$login'");
-
-                       if (db_num_rows($result) == 1) {
-                               $uid = db_fetch_result($result, 0, "id");
-                               print getGlobalUnread($link, $uid);
-                       } else {
-                               print "-1;User not found";
-                       }
-
-                       $print_exec_time = false;
-               break; // getUnread
+               case "pref-instances":
+                       module_pref_instances($link);
+               break; // pref-instances
 
                case "digestTest":
-                       header("Content-Type: text/plain");
                        print_r(prepare_headlines_digest($link, $_SESSION["uid"]));
-                       $print_exec_time = false;
                break; // digestTest
 
                case "digestSend":
-                       header("Content-Type: text/plain");
                        send_headlines_digests($link);
-                       $print_exec_time = false;
                break; // digestSend
 
+               case "loading":
+                       header("Content-type: text/html");
+                       print __("Loading, please wait...") . " " .
+                               "<img src='images/indicator_tiny.gif'>";
+               break; // loading
+
+               default:
+                       header("Content-Type: text/plain");
+                       print json_encode(array("error" => array("code" => 7)));
+               break; // fallback
        } // Select action according to $op value.
 
        // We close the connection to database.
        db_close($link);
 ?>
-
-<?php if ($print_exec_time) { ?>
-<!-- <?php echo sprintf("Backend execution time: %.4f seconds", getmicrotime() - $script_started) ?> -->
-<?php } ?>