[Tracker] Add a status for all trackers in a torrent

As part of the changes needed for a more informative trackers tab in the
UIs, we need the info for each of the trackers in the torrent.
For this, new status keys were added, and `tracker_status` is now
considered deprecated.

For tracker info, the keys are:
`trackers_status` - a dict of tracker_url->{status, message}
`trackers_peers` - a dict of tracker_url->number of peers in the tracker

`trackers_status` will contain the status of the torrent and also the
message from the relevant alert.

deluge/core/torrent.py

@@ -17,7 +17,7 @@
 import os
 import socket
 import time
-from typing import Optional, List
+from typing import List, Optional
 from urllib.parse import urlparse
 
 from twisted.internet.defer import Deferred, DeferredList
@@ -265,6 +265,8 @@ def __init__(self, handle, options, state=None, filename=None, magnet=None):
         self.state = None
         self.moving_storage_dest_path = None
         self.tracker_status = ''
+        self.trackers_status = {}
+        self.trackers_peers = {}
         self.tracker_host = None
         self.forcing_recheck = False
         self.forcing_recheck_paused = False
@@ -648,11 +650,13 @@ def trackers(self, trackers: List['lt.announce_entry']) -> None:
         self._trackers = trackers
         self._trackers_last_update = time.time()
 
-    def set_tracker_status(self, status):
+    def set_tracker_status(self, status: str, tracker_url: str, message: str = ''):
         """Sets the tracker status.
 
         Args:
-            status (str): The tracker status.
+            status: The tracker status.
+            tracker_url: The tracker url.
+            message: The message from tracker error/warning alerts
 
         Emits:
             TorrentTrackerStatusEvent upon tracker status change.
@@ -661,12 +665,35 @@ def set_tracker_status(self, status):
 
         self.tracker_host = None
 
-        if self.tracker_status != status:
-            self.tracker_status = status
+        if self.state == 'Paused':
+            return
+
+        if self.trackers_status.get(tracker_url, {}).get('status') != status:
+            self.trackers_status[tracker_url] = {
+                'status': status,
+                'message': message,
+            }
+            self.tracker_status = f'{status}{f": {message}" if message else ""}'
             component.get('EventManager').emit(
-                TorrentTrackerStatusEvent(self.torrent_id, self.tracker_status)
+                TorrentTrackerStatusEvent(
+                    self.torrent_id,
+                    self.trackers_status[tracker_url],
+                )
             )
 
+    def set_tracker_peers(self, peers: int, tracker_url: str):
+        """Sets the tracker peers amount
+
+        Args:
+            peers: The number of peers the tracker has.
+            tracker_url: The tracker url.
+        """
+        if self.state == 'Paused':
+            return
+
+        if self.trackers_peers.get(tracker_url) != peers:
+            self.trackers_peers[tracker_url] = peers
+
     def merge_trackers(self, torrent_info):
         """Merges new trackers in torrent_info into torrent"""
         log.info(
@@ -709,6 +736,8 @@ def update_state(self):
             self.state = 'Queued'
         elif session_paused or status.paused:
             self.state = 'Paused'
+            self.trackers_peers = {}
+            self.trackers_status = {}
         else:
             self.state = LT_TORRENT_STATE_MAP.get(str(status.state), str(status.state))
 
@@ -1201,7 +1230,10 @@ def _create_status_funcs(self):
             'tracker': lambda: self.status.current_tracker,
             'tracker_host': self.get_tracker_host,
             'trackers': lambda: self.trackers,
+            # Deprecated: Use trackers_status
             'tracker_status': lambda: self.tracker_status,
+            'trackers_status': lambda: self.trackers_status,
+            'trackers_peers': lambda: self.trackers_peers,
             'upload_payload_rate': lambda: self.status.upload_payload_rate,
             'comment': lambda: decode_bytes(self.torrent_info.comment())
             if self.has_metadata

deluge/core/torrentmanager.py

@@ -1347,7 +1347,9 @@ def on_alert_tracker_reply(self, alert):
             return
 
         # Set the tracker status for the torrent
-        torrent.set_tracker_status('Announce OK')
+        torrent.set_tracker_status('Announce OK', alert.url)
+        # Set the amount of peers of the tracker
+        torrent.set_tracker_peers(alert.num_peers, alert.url)
 
         # Check for peer information from the tracker, if none then send a scrape request.
         torrent.get_lt_status()
@@ -1362,7 +1364,7 @@ def on_alert_tracker_announce(self, alert):
             return
 
         # Set the tracker status for the torrent
-        torrent.set_tracker_status('Announce Sent')
+        torrent.set_tracker_status('Announce Sent', alert.url)
 
     def on_alert_tracker_warning(self, alert):
         """Alert handler for libtorrent tracker_warning_alert"""
@@ -1371,7 +1373,11 @@ def on_alert_tracker_warning(self, alert):
         except (RuntimeError, KeyError):
             return
         # Set the tracker status for the torrent
-        torrent.set_tracker_status('Warning: %s' % decode_bytes(alert.message()))
+        torrent.set_tracker_status(
+            'Warning',
+            alert.url,
+            decode_bytes(alert.warning_message()),
+        )
 
     def on_alert_tracker_error(self, alert):
         """Alert handler for libtorrent tracker_error_alert"""
@@ -1384,7 +1390,7 @@ def on_alert_tracker_error(self, alert):
         if not error_message:
             error_message = decode_bytes(alert.error.message())
         log.debug(
-            'Tracker Error Alert: %s [%s]', decode_bytes(alert.message()), error_message
+            f'Tracker Error Alert: {decode_bytes(alert.message())} [{error_message}]'
         )
         # libtorrent 1.2 added endpoint struct to each tracker. to prevent false updates
         # we will need to verify that at least one endpoint to the errored tracker is working
@@ -1394,9 +1400,9 @@ def on_alert_tracker_error(self, alert):
                     endpoint['last_error']['value'] == 0
                     for endpoint in tracker['endpoints']
                 ):
-                    torrent.set_tracker_status('Announce OK')
+                    torrent.set_tracker_status('Announce OK', alert.url)
                 else:
-                    torrent.set_tracker_status('Error: ' + error_message)
+                    torrent.set_tracker_status('Error', alert.url, error_message)
                 break
 
     def on_alert_storage_moved(self, alert):