From a9f396f3274e72a8f0801425bb57425e560e9fa6 Mon Sep 17 00:00:00 2001
From: Danny van Heumen <danny@dannyvanheumen.nl>
Date: Wed, 11 Feb 2015 00:08:11 +0100
Subject: Use MONITOR maximum list size. Some clean-up.

---
 .../impl/protocol/irc/MonitorPresenceWatcher.java  | 27 +++++++++++++++++-----
 .../impl/protocol/irc/PresenceManager.java         | 12 +++++-----
 2 files changed, 27 insertions(+), 12 deletions(-)

(limited to 'src')

diff --git a/src/net/java/sip/communicator/impl/protocol/irc/MonitorPresenceWatcher.java b/src/net/java/sip/communicator/impl/protocol/irc/MonitorPresenceWatcher.java
index 7001c61..37eb940 100644
--- a/src/net/java/sip/communicator/impl/protocol/irc/MonitorPresenceWatcher.java
+++ b/src/net/java/sip/communicator/impl/protocol/irc/MonitorPresenceWatcher.java
@@ -58,7 +58,8 @@ class MonitorPresenceWatcher
      */
     MonitorPresenceWatcher(final IRCApi irc, final IIRCState connectionState,
         final SortedSet<String> nickWatchList,
-        final OperationSetPersistentPresenceIrcImpl operationSet)
+        final OperationSetPersistentPresenceIrcImpl operationSet,
+        final int maxListSize)
     {
         if (irc == null)
         {
@@ -77,9 +78,8 @@ class MonitorPresenceWatcher
         }
         this.nickWatchList = nickWatchList;
         this.irc.addListener(new MonitorReplyListener(operationSet));
-        setUpMonitor(this.irc, this.nickWatchList);
+        setUpMonitor(this.irc, this.nickWatchList, maxListSize);
         // FIXME add basic poller watcher as a fallback method
-        // FIXME adhere to limits according to ISUPPORT MONITOR=# entry
         LOGGER.debug("MONITOR presence watcher initialized.");
     }
 
@@ -90,13 +90,18 @@ class MonitorPresenceWatcher
      * still being initialized.
      */
     private static void setUpMonitor(final IRCApi irc,
-        final SortedSet<String> nickWatchList)
+        final SortedSet<String> nickWatchList, final int maxListSize)
     {
-        final List<String> current;
+        List<String> current;
         synchronized (nickWatchList)
         {
             current = new LinkedList<String>(nickWatchList);
         }
+        if (current.size() > maxListSize)
+        {
+            // cut off list to maximum number of entries allowed by server
+            current = current.subList(0, maxListSize);
+        }
         final int maxLength = 510 - MONITOR_ADD_CMD_STATIC_OVERHEAD;
         final StringBuilder query = new StringBuilder();
         for (String nick : current)
@@ -158,7 +163,6 @@ class MonitorPresenceWatcher
          */
         private static final int IRC_RPL_MONOFFLINE = 731;
 
-        // Unused constants. Listed for completeness.
         // /**
         // * Numeric message id for MONLIST entry.
         // */
@@ -170,6 +174,12 @@ class MonitorPresenceWatcher
         // private static final int IRC_RPL_ENDOFMONLIST = 733;
 
         /**
+         * Error message signaling full list. Nick list provided are all nicks
+         * that failed to be added to the monitor list.
+         */
+        private static final int IRC_ERR_MONLISTFULL = 734;
+
+        /**
          * Operation set persistent presence instance.
          */
         private final OperationSetPersistentPresenceIrcImpl operationSet;
@@ -228,6 +238,11 @@ class MonitorPresenceWatcher
                 }
                 monitoredNickList.addAll(acknowledged);
                 break;
+            case IRC_ERR_MONLISTFULL:
+                LOGGER.debug("MONITOR list full. Nick was not added. "
+                    + "Fall back Basic Poller will be used if it is enabled. ("
+                    + msg.getText() + ")");
+                break;
             }
         }
 
diff --git a/src/net/java/sip/communicator/impl/protocol/irc/PresenceManager.java b/src/net/java/sip/communicator/impl/protocol/irc/PresenceManager.java
index 7e1ca52..da30cd0 100644
--- a/src/net/java/sip/communicator/impl/protocol/irc/PresenceManager.java
+++ b/src/net/java/sip/communicator/impl/protocol/irc/PresenceManager.java
@@ -19,16 +19,16 @@ import com.ircclouds.irc.api.state.*;
 /**
  * Manager for presence status of IRC connection.
  *
- * There is (somewhat primitive) support for online presence by periodically
- * querying IRC server with ISON requests for each of the members in the contact
- * list.
+ * There is support for online presence by polling (periodically querying IRC
+ * server with ISON requests) for each of the members in the contact list or, if
+ * supported by the IRC server, for the MONITOR command to subscribe to presence
+ * notifications for the specified nick.
  *
  * TODO Support for 'a' (Away) user mode. (Check this again, since I also see
  * 'a' used for other purposes. This may be one of those ambiguous letters that
  * every server interprets differently.)
  *
- * TODO Improve presence watcher by using WATCH or MONITOR. (Monitor does not
- * seem to support away status, though)
+ * TODO Additionally add support for pub/sub presence notifications using WATCH.
  *
  * @author Danny van Heumen
  */
@@ -161,7 +161,7 @@ public class PresenceManager
             {
                 this.watcher =
                     new MonitorPresenceWatcher(this.irc, this.connectionState,
-                        nickWatchList, this.operationSet);
+                        nickWatchList, this.operationSet, this.isupportMonitor);
             }
         }
         else
-- 
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