Now chats are restored too !! :-)

diff --git a/mod/chat/restorelib.php b/mod/chat/restorelib.php
new file mode 100644 (file)
index 0000000..9a23a40
--- /dev/null
+++ b/mod/chat/restorelib.php
@@ -0,0 +1,129 @@
+<?PHP //$Id$
+    //This php script contains all the stuff to backup/restore
+    //chat mods
+
+    //This is the "graphical" structure of the chat mod:
+    //
+    //                       chat
+    //                    (CL,pk->id)             
+    //                        |
+    //                        |
+    //                        |
+    //                    chat_messages 
+    //                (UL,pk->id, fk->chatid)
+    //
+    // Meaning: pk->primary key field of the table
+    //          fk->foreign key to link with parent
+    //          nt->nested field (recursive data)
+    //          CL->course level info
+    //          UL->user level info
+    //          files->table may have files)
+    //
+    //-----------------------------------------------------------
+
+    //This function executes all the restore procedure about this mod
+    function chat_restore_mods($mod,$restore) {
+
+        global $CFG;
+
+        $status = true;
+
+        //Get record from backup_ids
+        $data = backup_getid($restore->backup_unique_code,$mod->modtype,$mod->id);
+
+        if ($data) {
+            //Now get completed xmlized object   
+            $info = $data->info;
+            //traverse_xmlize($info);                                                                     //Debug
+            //print_object ($GLOBALS['traverse_array']);                                                  //Debug
+            //$GLOBALS['traverse_array']="";                                                              //Debug
+
+            //Now, build the CHAT record structure
+            $chat->course = $restore->course_id;
+            $chat->name = backup_todb($info['MOD']['#']['NAME']['0']['#']);
+            $chat->intro = backup_todb($info['MOD']['#']['INTRO']['0']['#']);
+            $chat->keepdays = backup_todb($info['MOD']['#']['KEEPDAYS']['0']['#']);
+            $chat->studentlogs = backup_todb($info['MOD']['#']['STUDENTLOGS']['0']['#']);
+            $chat->schedule = backup_todb($info['MOD']['#']['SCHEDULE']['0']['#']);
+            $chat->chattime = backup_todb($info['MOD']['#']['CHATTIME']['0']['#']);
+            $chat->timemodified = backup_todb($info['MOD']['#']['TIMEMODIFIED']['0']['#']);
+
+            //The structure is equal to the db, so insert the chat
+            $newid = insert_record ("chat",$chat);
+
+            //Do some output     
+            echo "<ul><li>".get_string("modulename","chat")." \"".$chat->name."\"<br>";
+            backup_flush(300);
+
+            if ($newid) {
+                //We have the newid, update backup_ids
+                backup_putid($restore->backup_unique_code,$mod->modtype,
+                             $mod->id, $newid);
+                //Now check if want to restore user data and do it.
+                if ($restore->mods[chat]->userinfo) {
+                    //Restore chat_messages
+                    $status = chat_messages_restore_mods ($mod->id, $newid,$info,$restore);
+                }
+            } else {
+                $status = false;
+            }
+
+            //Finalize ul        
+            echo "</ul>";
+        
+        } else {
+            $status = false;
+        }
+
+        return $status;
+    }
+
+    //This function restores the chat_messages
+    function chat_messages_restore_mods($old_chat_id, $new_chat_id,$info,$restore) {
+
+        global $CFG;
+
+        $status = true;
+
+        //Get the messages array 
+        $messages = $info['MOD']['#']['MESSAGES']['0']['#']['MESSAGE'];
+
+        //Iterate over messages
+        for($i = 0; $i < sizeof($messages); $i++) {
+            $mes_info = $messages[$i];
+            //traverse_xmlize($mes_info);                                                                 //Debug
+            //print_object ($GLOBALS['traverse_array']);                                                  //Debug
+            //$GLOBALS['traverse_array']="";                                                              //Debug
+
+            //We'll need this later!!
+            $oldid = backup_todb($mes_info['#']['ID']['0']['#']);
+            $olduserid = backup_todb($mes_info['#']['USERID']['0']['#']);
+
+            //Now, build the CHAT_MESSAGES record structure
+            $message->chatid = $new_chat_id;
+            $message->userid = backup_todb($mes_info['#']['USERID']['0']['#']);
+            $message->system = backup_todb($mes_info['#']['SYSTEM']['0']['#']);
+            $message->message = backup_todb($mes_info['#']['MESSAGE_TEXT']['0']['#']);
+            $message->timestamp = backup_todb($mes_info['#']['TIMESTAMP']['0']['#']);
+
+            //We have to recode the userid field
+            $user = backup_getid($restore->backup_unique_code,"user",$message->userid);
+            if ($user) {
+                $message->userid = $user->new_id;
+            }
+
+            //The structure is equal to the db, so insert the chat_message
+            $newid = insert_record ("chat_messages",$message);
+
+            //Do some output
+            if (($i+1) % 50 == 0) {
+                echo ".";
+                if (($i+1) % 1000 == 0) {
+                    echo "<br>";
+                }
+                backup_flush(300);
+            }
+        }
+        return $status;
+    }
+?>