implement fetching and exporting of shared feeds

1 files changed, 89 insertions, 1 deletions

diff --git a/functions.php b/functions.php
index 0da69094a..e0c2a664b 100644
--- a/functions.php
+++ b/functions.php
@@ -358,7 +358,7 @@
 		}
 	}
 
-	function fetch_file_contents($url, $type = false, $login = false, $pass = false) {
+	function fetch_file_contents($url, $type = false, $login = false, $pass = false, $post_query = false) {
 		$login = urlencode($login);
 		$pass = urlencode($pass);
 
@@ -374,6 +374,11 @@
 			curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
 			curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 
+			if ($post_query) {
+				curl_setopt($ch, CURLOPT_POST, true);
+				curl_setopt($ch, CURLOPT_POSTFIELDS, $post_query);
+			}
+
 			if ($login && $pass)
 				curl_setopt($ch, CURLOPT_USERPWD, "$login:$pass");
 
@@ -7351,4 +7356,87 @@
 
 		return $query;
 	}
+
+	// Status codes:
+	// -1  - never connected
+	// 0   - no data received
+	// 1   - data received successfully
+	// 2   - did not receive valid data
+	// >10 - server error, code + 10 (e.g. 16 means server error 6)
+
+	function get_linked_feeds($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 '1 second'";
+		} 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'] . '/backend.php?op=fbexport';
+			$post_query = 'key=' . $line['access_key'];
+
+			$feeds = fetch_file_contents($fetch_url, false, false, false, $post_query);
+
+			if ($feeds) {
+				$feeds = json_decode($feeds, true);
+
+				if ($feeds) {
+					if ($feeds['error']) {
+						$status = $feeds['error']['code'] + 10;
+					} 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']);
+
+								db_query($link, "INSERT INTO ttrss_linked_feeds
+									(feed_url, title, subscribers, instance_id, created, updated)
+								VALUES
+									('$feed_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'");
+
+		}
+
+	}
 ?>