add -list-plugins option; about sections to plugins

[tt-rss.git] / plugins / instances / instances.php

diff --git a/plugins/instances/instances.php b/plugins/instances/instances.php
index c5d8067afee978d7152773b44b6ca72907f3e8d9..c6a5531cd6858e9917e7a96f690b778ef14236c2 100644 (file)
--- a/plugins/instances/instances.php
+++ b/plugins/instances/instances.php
@@ -10,12 +10,125 @@ class Instances extends Plugin implements IHandler {
                2       => "Invalid object received",
                16      => "Access denied" );
 
+       function _about() {
+               return array(1.0,
+                       "Support for linking tt-rss instances together and sharing popular feeds.",
+                       "fox");
+       }
+
        function __construct($host) {
                $this->link = $host->get_link();
                $this->host = $host;
 
                $host->add_hook($host::HOOK_PREFS_TABS, $this);
                $host->add_handler("pref-instances", "*", $this);
+               $host->add_command("get-feeds", "receive popular feeds from linked instances", $this);
+               $host->add_hook($host::HOOK_UPDATE_TASK, $this);
+       }
+
+       function hook_update_task($args) {
+               _debug("Get linked feeds...");
+               $this->get_linked_feeds($this->link);
+       }
+
+       // Status codes:
+       // -1  - never connected
+       // 0   - no data received
+       // 1   - data received successfully
+       // 2   - did not receive valid data
+       // >10 - server error, code + 10 (e.g. 16 means server error 6)
+
+       function get_linked_feeds($link, $instance_id = false) {
+               if ($instance_id)
+                       $instance_qpart = "id = '$instance_id' AND ";
+               else
+                       $instance_qpart = "";
+
+               if (DB_TYPE == "pgsql") {
+                       $date_qpart = "last_connected < NOW() - INTERVAL '6 hours'";
+               } else {
+                       $date_qpart = "last_connected < DATE_SUB(NOW(), INTERVAL 6 HOUR)";
+               }
+
+               $result = db_query($link, "SELECT id, access_key, access_url FROM ttrss_linked_instances
+                       WHERE $instance_qpart $date_qpart ORDER BY last_connected");
+
+               while ($line = db_fetch_assoc($result)) {
+                       $id = $line['id'];
+
+                       _debug("Updating: " . $line['access_url'] . " ($id)");
+
+                       $fetch_url = $line['access_url'] . '/public.php?op=fbexport';
+                       $post_query = 'key=' . $line['access_key'];
+
+                       $feeds = fetch_file_contents($fetch_url, false, false, false, $post_query);
+
+                       // try doing it the old way
+                       if (!$feeds) {
+                               $fetch_url = $line['access_url'] . '/backend.php?op=fbexport';
+                               $feeds = fetch_file_contents($fetch_url, false, false, false, $post_query);
+                       }
+
+                       if ($feeds) {
+                               $feeds = json_decode($feeds, true);
+
+                               if ($feeds) {
+                                       if ($feeds['error']) {
+                                               $status = $feeds['error']['code'] + 10;
+
+                                               // access denied
+                                               if ($status == 16) {
+                                                       db_query($link, "DELETE FROM ttrss_linked_feeds
+                                                               WHERE instance_id = '$id'");
+                                               }
+                                       } else {
+                                               $status = 1;
+
+                                               if (count($feeds['feeds']) > 0) {
+
+                                                       db_query($link, "DELETE FROM ttrss_linked_feeds
+                                                               WHERE instance_id = '$id'");
+
+                                                       foreach ($feeds['feeds'] as $feed) {
+                                                               $feed_url = db_escape_string($feed['feed_url']);
+                                                               $title = db_escape_string($feed['title']);
+                                                               $subscribers = db_escape_string($feed['subscribers']);
+                                                               $site_url = db_escape_string($feed['site_url']);
+
+                                                               db_query($link, "INSERT INTO ttrss_linked_feeds
+                                                                       (feed_url, site_url, title, subscribers, instance_id, created, updated)
+                                                               VALUES
+                                                                       ('$feed_url', '$site_url', '$title', '$subscribers', '$id', NOW(), NOW())");
+                                                       }
+                                               } else {
+                                                       // received 0 feeds, this might indicate that
+                                                       // the instance on the other hand is rebuilding feedbrowser cache
+                                                       // we will try again later
+
+                                                       // TODO: maybe perform expiration based on updated here?
+                                               }
+
+                                               _debug("Processed " . count($feeds['feeds']) . " feeds.");
+                                       }
+                               } else {
+                                       $status = 2;
+                               }
+
+                       } else {
+                               $status = 0;
+                       }
+
+                       _debug("Status: $status");
+
+                       db_query($link, "UPDATE ttrss_linked_instances SET
+                               last_status_out = '$status', last_connected = NOW() WHERE id = '$id'");
+
+               }
+       }
+
+
+       function get_feeds() {
+               $this->get_linked_feeds($this->link, false);
        }
 
        function get_prefs_js() {