From 44d34e89909728913d01e508feb6ddbc79c59bf2 Mon Sep 17 00:00:00 2001
From: Dongsheng Cai <unoter@gmail.com>
Date: Fri, 4 Dec 2009 03:51:20 +0000
Subject: [PATCH] "MDL-20587, chat module, show sessions with just one users,
 credits to Daniel Neis"

---
 lang/en_utf8/chat.php |  4 ++++
 mod/chat/report.php   | 32 ++++++++++++++++++++++++++------
 2 files changed, 30 insertions(+), 6 deletions(-)

diff --git a/lang/en_utf8/chat.php b/lang/en_utf8/chat.php
index 4cfa2d69602..9091c8259e6 100644
--- a/lang/en_utf8/chat.php
+++ b/lang/en_utf8/chat.php
@@ -33,6 +33,9 @@ $string['explainmethodnormal'] = 'These settings matter <strong>only</strong> if
 $string['generalconfig'] = 'General configuration';
 $string['helpchatting'] = 'Help with chatting';
 $string['idle'] = 'Idle';
+$string['list_complete_sessions'] = 'List just complete sessions.';
+$string['list_all_sessions'] = 'List all sessions.';
+$string['listing_all_sessions'] = 'Listing all sessions.';
 $string['messagebeepseveryone'] = '$a beeps everyone!';
 $string['messagebeepsyou'] = '$a has just beeped you!';
 $string['messageenter'] = '$a has just entered this chat';
@@ -45,6 +48,7 @@ $string['modulename'] = 'Chat';
 $string['modulenameplural'] = 'Chats';
 $string['neverdeletemessages'] = 'Never delete messages';
 $string['nextsession'] = 'Next scheduled session';
+$string['no_complete_sessions_found'] = 'No complete sessions found.';
 $string['noguests'] = 'The chat is not open to guests';
 $string['nomessages'] = 'No messages yet';
 $string['normalkeepalive'] = 'KeepAlive';
diff --git a/mod/chat/report.php b/mod/chat/report.php
index 34e13513572..5d5d561785d 100644
--- a/mod/chat/report.php
+++ b/mod/chat/report.php
@@ -10,6 +10,7 @@
     $end           = optional_param('end', 0, PARAM_INT);     // End of period
     $deletesession = optional_param('deletesession', 0, PARAM_BOOL);
     $confirmdelete = optional_param('confirmdelete', 0, PARAM_BOOL);
+    $show_all      = optional_param('show_all', 0, PARAM_BOOL);
 
     if (! $cm = get_coursemodule_from_id('chat', $id)) {
         error('Course Module ID was incorrect');
@@ -132,13 +133,21 @@
         }
     }
 
+    if ($show_all) {
+        print_heading(get_string('listing_all_sessions', 'chat') . 
+                      '&nbsp;<a href="report.php?id='.$cm->id.'&amp;show_all=0">'.
+                      get_string('list_complete_sessions', 'chat').
+                      '</a>', '', 3);
+    }
+
 /// Show all the sessions
 
-    $sessiongap = 5 * 60;    // 5 minutes silence means a new session
-    $sessionend = 0;
-    $sessionstart   = 0;
-    $sessionusers = array();
-    $lasttime   = 0;
+    $sessiongap        = 5 * 60;    // 5 minutes silence means a new session
+    $sessionend        = 0;
+    $sessionstart      = 0;
+    $sessionusers      = array();
+    $lasttime          = 0;
+    $complete_sessions = 0;
 
     $messagesleft = count($messages);
 
@@ -163,7 +172,8 @@
         } else {
             $sessionstart = $lasttime;
 
-            if ($sessionend - $sessionstart > 60 and count($sessionusers) > 1) {
+            $is_complete = ($sessionend - $sessionstart > 60 and count($sessionusers) > 1);
+            if ($show_all or $is_complete) {
 
                 echo '<p align="center">'.userdate($sessionstart).' --> '. userdate($sessionend).'</p>';
 
@@ -186,6 +196,9 @@
                 echo '</p>';
                 print_simple_box_end();
             }
+            if ($is_complete) {
+                $complete_sessions++;
+            }
 
             $sessionend = $message->timestamp;
             $sessionusers = array();
@@ -194,6 +207,13 @@
         $lasttime = $message->timestamp;
     }
 
+    if (!$show_all and $complete_sessions == 0) {
+        print_heading(get_string('no_complete_sessions_found', 'chat') . 
+                      '&nbsp;<a href="report.php?id='.$cm->id.'&amp;show_all=1">'.
+                      get_string('list_all_sessions', 'chat').
+                      '</a>', '', 3);
+    }
+
 /// Finish the page
     print_footer($course);