From 6e5dd5459a1b231c6e4b45ed1e60f86678b59dad Mon Sep 17 00:00:00 2001
From: Andrew Garrett <werdna@users.mediawiki.org>
Date: Mon, 27 Jul 2009 17:57:51 +0000
Subject: [PATCH] Incremental enabling changes to allow searching of
 LiquidThreads by page and by thread: * Add three new hooks,
 XmlDumpWriterOpenPage, ModifyExportQuery and XmlDumpWriterWriteRevision, to
 WikiExporter class. * Hook two of these events to add a DiscussionThreading
 section to XML dumps, containing the parent, ancestor and discussion page to
 which a post belongs, if it is indeed a LiquidThreads post (as determined by
 joining on the thread table). * Deprecate old calling style for Thread
 constructor, the $children parameter has been unused for yonks.

---
 docs/hooks.txt      | 21 +++++++++++++++++++++
 includes/Export.php |  8 ++++++++
 2 files changed, 29 insertions(+)

diff --git a/docs/hooks.txt b/docs/hooks.txt
index ece9e28e58..65048b5762 100644
--- a/docs/hooks.txt
+++ b/docs/hooks.txt
@@ -1017,6 +1017,13 @@ Useful for updating caches.
 $title: name of the page changed.
 $text: new contents of the page.
 
+'ModifyExportQuery': Modify the query used by the exporter.
+$db: The database object to be queried.
+&$tables: Tables in the query.
+&$conds: Conditions in the query.
+&$opts: Options for the query.
+&$join_conds: Join conditions for the query.
+
 'MonoBookTemplateToolboxEnd': Called by Monobook skin after toolbox links have
 been rendered (useful for adding more)
 Note: this is only run for the Monobook skin.  To add items to the toolbox
@@ -1634,5 +1641,19 @@ One, and only one hook should set this, and return false.
 query pages to be updated with maintenance/updateSpecialPages.php
 $query: $wgQueryPages itself
 
+'XmlDumpWriterOpenPage': Called at the end of XmlDumpWriter::openPage, to allow extra
+ metadata to be added.
+$obj: The XmlDumpWriter object.
+&$out: The output string.
+$row: The database row for the page.
+$title: The title of the page.
+
+'XmlDumpWriterWriteRevision': Called at the end of a revision in an XML dump, to add extra
+ metadata.
+$obj: The XmlDumpWriter object.
+&$out: The text being output.
+$row: The database row for the revision.
+$text: The revision text.
+
 More hooks might be available but undocumented, you can execute
 ./maintenance/findhooks.php to find hidden one.
diff --git a/includes/Export.php b/includes/Export.php
index 3372cece4a..f05b660ec4 100644
--- a/includes/Export.php
+++ b/includes/Export.php
@@ -266,6 +266,9 @@ class WikiExporter {
 			if( $this->buffer == WikiExporter::STREAM ) {
 				$prev = $this->db->bufferResults( false );
 			}
+			
+			wfRunHooks( 'ModifyExportQuery',
+						array( $this->db, &$tables, &$cond, &$opts, &$join ) );
 
 			# Do the query!
 			$result = $this->db->select( $tables, '*', $cond, __METHOD__, $opts, $join );
@@ -445,6 +448,9 @@ class XmlDumpWriter {
 			$out .= '    ' . Xml::element( 'restrictions', array(),
 				strval( $row->page_restrictions ) ) . "\n";
 		}
+		
+		wfRunHooks( 'XmlDumpWriterOpenPage', array( $this, &$out, $row, $title ) );
+		
 		return $out;
 	}
 
@@ -503,6 +509,8 @@ class XmlDumpWriter {
 				array( 'id' => $row->rev_text_id ),
 				"" ) . "\n";
 		}
+		
+		wfRunHooks( 'XmlDumpWriterWriteRevision', array( &$this, &$out, $row, $text ) );
 
 		$out .= "    </revision>\n";
 
-- 
2.20.1