From 6a5d22374ab6a80cf060c167335317ba4873acd3 Mon Sep 17 00:00:00 2001
From: Rob Church <robchurch@users.mediawiki.org>
Date: Mon, 12 Jun 2006 12:38:41 +0000
Subject: [PATCH] (bug 5932) Introduce {{PAGESINNAMESPACE}} magic word

---
 RELEASE-NOTES          |  1 +
 includes/MagicWord.php |  2 ++
 includes/Parser.php    | 32 ++++++++++++++++++++++++++++++++
 languages/Language.php |  1 +
 4 files changed, 36 insertions(+)

diff --git a/RELEASE-NOTES b/RELEASE-NOTES
index a18f40d3b4..7e7f81d41c 100644
--- a/RELEASE-NOTES
+++ b/RELEASE-NOTES
@@ -478,6 +478,7 @@ it from source control: http://www.mediawiki.org/wiki/Download_from_SVN
   themselves. Some minor tweaks to the actual message content.
 * Introduce $wgContentNamespaces which allows for articles to exist in namespaces other
   than the main namespace, and still be counted as valid content in the site statistics.
+* (bug 5932) Introduce {{PAGESINNAMESPACE}} magic word
 
 == Compatibility ==
 
diff --git a/includes/MagicWord.php b/includes/MagicWord.php
index 030b52801b..a68407c735 100644
--- a/includes/MagicWord.php
+++ b/includes/MagicWord.php
@@ -93,6 +93,7 @@ $magicWords = array(
 	'MAG_DIRECTIONMARK',
 	'MAG_LANGUAGE',
 	'MAG_CONTENTLANGUAGE',
+	'MAG_PAGESINNAMESPACE',
 );
 if ( ! defined( 'MEDIAWIKI_INSTALL' ) )
 	wfRunHooks( 'MagicWordMagicWords', array( &$magicWords ) );
@@ -148,6 +149,7 @@ $wgVariableIDs = array(
 	MAG_DIRECTIONMARK,
 	MAG_LANGUAGE,
 	MAG_CONTENTLANGUAGE,
+	MAG_PAGESINNAMESPACE,
 );
 if ( ! defined( 'MEDIAWIKI_INSTALL' ) )
 	wfRunHooks( 'MagicWordwgVariableIDs', array( &$wgVariableIDs ) );
diff --git a/includes/Parser.php b/includes/Parser.php
index f7e5f50bd7..4658d1c912 100644
--- a/includes/Parser.php
+++ b/includes/Parser.php
@@ -2795,6 +2795,21 @@ class Parser
 				}
 			}
 		}
+		
+		# PAGESINNAMESPACE
+		if( !$found ) {
+			$mwPagesInNs =& MagicWord::get( MAG_PAGESINNAMESPACE );
+			if( $mwPagesInNs->matchStartAndRemove( $part1 ) ) {
+				$found = true;
+				$count = wfPagesInNs( intval( $part1 ) );
+				$mwRawSuffix =& MagicWord::get( MAG_RAWSUFFIX );
+				if( isset( $args[0] ) && $mwRawSuffix->match( $args[0] ) ) {
+					$text = $linestart . $count;
+				} else {
+					$text = $linestart . $wgContLang->formatNum( $count );
+				}
+			}
+		}
 
 		# #LANGUAGE:
 		if( !$found ) {
@@ -4640,6 +4655,23 @@ function wfNumberOfPages() {
 	return (int)$count;
 }
 
+/**
+ * Count the number of pages in a particular namespace
+ *
+ * @param $ns Namespace
+ * @return integer
+ */
+function wfPagesInNs( $ns ) {
+	static $pageCount = array();
+	wfProfileIn( 'wfPagesInNs' );
+	if( !isset( $pageCount[$ns] ) ) {
+		$dbr =& wfGetDB( DB_SLAVE );
+		$pageCount[$ns] = $dbr->selectField( 'page', 'COUNT(*)', array( 'page_namespace' => $ns ), 'wfPagesInNs' );
+	}
+	wfProfileOut( 'wfPagesInNs' );
+	return (int)$pageCount[$ns];
+}
+
 /**
  * Get various statistics from the database
  * @private
diff --git a/languages/Language.php b/languages/Language.php
index 841fa55823..30d9044c81 100644
--- a/languages/Language.php
+++ b/languages/Language.php
@@ -291,6 +291,7 @@ $wgLanguageNamesEn =& $wgLanguageNames;
 	MAG_DIRECTIONMARK        => array( 1,    'DIRECTIONMARK', 'DIRMARK' ),
 	MAG_LANGUAGE			 => array( 0,	 '#LANGUAGE:' ),
 	MAG_CONTENTLANGUAGE		 => array( 1,	 'CONTENTLANGUAGE', 'CONTENTLANG' ),
+	MAG_PAGESINNAMESPACE	 => array( 1,	 'PAGESINNAMESPACE:', 'PAGESINNS:' ),
 );
 
 if (!$wgCachedMessageArrays) {
-- 
2.20.1