<?php
-
/**
* The "Categoryfinder" class takes a list of articles, creates an internal
* representation of all their parent categories (as well as parents of
* # Determines whether the article with the page_id 12345 is in both
* # "Category 1" and "Category 2" or their subcategories, respectively
*
- * $cf = new Categoryfinder ;
- * $cf->seed (
- * array ( 12345 ) ,
- * array ( "Category 1","Category 2" ) ,
- * "AND"
- * ) ;
- * $a = $cf->run() ;
- * print implode ( "," , $a ) ;
+ * $cf = new Categoryfinder;
+ * $cf->seed(
+ * array( 12345 ),
+ * array( 'Category 1', 'Category 2' ),
+ * 'AND'
+ * );
+ * $a = $cf->run();
+ * print implode( ',' , $a );
* </code>
*
*/
class Categoryfinder {
-
- var $articles = array () ; # The original article IDs passed to the seed function
- var $deadend = array () ; # Array of DBKEY category names for categories that don't have a page
- var $parents = array () ; # Array of [ID => array()]
- var $next = array () ; # Array of article/category IDs
- var $targets = array () ; # Array of DBKEY category names
- var $name2id = array () ;
- var $mode ; # "AND" or "OR"
- var $dbr ; # Read-DB slave
+ var $articles = array(); # The original article IDs passed to the seed function
+ var $deadend = array(); # Array of DBKEY category names for categories that don't have a page
+ var $parents = array(); # Array of [ID => array()]
+ var $next = array(); # Array of article/category IDs
+ var $targets = array(); # Array of DBKEY category names
+ var $name2id = array();
+ var $mode; # "AND" or "OR"
+ var $dbr; # Read-DB slave
/**
* Constructor (currently empty).
* @param $categories FIXME
* @param $mode String: FIXME, default 'AND'.
*/
- function seed ( $article_ids , $categories , $mode = "AND" ) {
- $this->articles = $article_ids ;
- $this->next = $article_ids ;
- $this->mode = $mode ;
+ function seed( $article_ids, $categories, $mode = 'AND' ) {
+ $this->articles = $article_ids;
+ $this->next = $article_ids;
+ $this->mode = $mode;
# Set the list of target categories; convert them to DBKEY form first
- $this->targets = array () ;
- foreach ( $categories AS $c ) {
+ $this->targets = array();
+ foreach ( $categories as $c ) {
$ct = Title::makeTitleSafe( NS_CATEGORY, $c );
- if( $ct ) {
+ if ( $ct ) {
$c = $ct->getDBkey();
$this->targets[$c] = $c;
}
* then checks the articles if they match the conditions
* @return array of page_ids (those given to seed() that match the conditions)
*/
- function run () {
+ function run() {
$this->dbr = wfGetDB( DB_SLAVE );
- while ( count ( $this->next ) > 0 ) {
- $this->scan_next_layer () ;
+ while ( count( $this->next ) > 0 ) {
+ $this->scan_next_layer();
}
# Now check if this applies to the individual articles
- $ret = array () ;
- foreach ( $this->articles AS $article ) {
- $conds = $this->targets ;
- if ( $this->check ( $article , $conds ) ) {
+ $ret = array();
+
+ foreach ( $this->articles as $article ) {
+ $conds = $this->targets;
+ if ( $this->check( $article, $conds ) ) {
# Matches the conditions
- $ret[] = $article ;
+ $ret[] = $article;
}
}
- return $ret ;
+ return $ret;
}
/**
* @param $path used to check for recursion loops
* @return bool Does this match the conditions?
*/
- function check ( $id , &$conds, $path=array() ) {
+ function check( $id, &$conds, $path = array() ) {
// Check for loops and stop!
- if( in_array( $id, $path ) )
+ if ( in_array( $id, $path ) ) {
return false;
+ }
+
$path[] = $id;
# Shortcut (runtime paranoia): No contitions=all matched
- if ( count ( $conds ) == 0 ) return true ;
+ if ( count( $conds ) == 0 ) {
+ return true;
+ }
- if ( !isset ( $this->parents[$id] ) ) return false ;
+ if ( !isset( $this->parents[$id] ) ) {
+ return false;
+ }
# iterate through the parents
- foreach ( $this->parents[$id] AS $p ) {
+ foreach ( $this->parents[$id] as $p ) {
$pname = $p->cl_to ;
# Is this a condition?
- if ( isset ( $conds[$pname] ) ) {
+ if ( isset( $conds[$pname] ) ) {
# This key is in the category list!
- if ( $this->mode == "OR" ) {
+ if ( $this->mode == 'OR' ) {
# One found, that's enough!
- $conds = array () ;
- return true ;
+ $conds = array();
+ return true;
} else {
# Assuming "AND" as default
- unset ( $conds[$pname] ) ;
- if ( count ( $conds ) == 0 ) {
+ unset( $conds[$pname] );
+ if ( count( $conds ) == 0 ) {
# All conditions met, done
- return true ;
+ return true;
}
}
}
# Not done yet, try sub-parents
- if ( !isset ( $this->name2id[$pname] ) ) {
+ if ( !isset( $this->name2id[$pname] ) ) {
# No sub-parent
- continue ;
+ continue;
}
- $done = $this->check ( $this->name2id[$pname] , $conds, $path );
- if ( $done OR count ( $conds ) == 0 ) {
+ $done = $this->check( $this->name2id[$pname], $conds, $path );
+ if ( $done || count( $conds ) == 0 ) {
# Subparents have done it!
- return true ;
+ return true;
}
}
- return false ;
+ return false;
}
/**
* Scans a "parent layer" of the articles/categories in $this->next
*/
- function scan_next_layer () {
- $fname = "Categoryfinder::scan_next_layer" ;
-
+ function scan_next_layer() {
# Find all parents of the article currently in $this->next
- $layer = array () ;
+ $layer = array();
$res = $this->dbr->select(
- /* FROM */ 'categorylinks',
- /* SELECT */ '*',
- /* WHERE */ array( 'cl_from' => $this->next ),
- $fname."-1"
+ /* FROM */ 'categorylinks',
+ /* SELECT */ '*',
+ /* WHERE */ array( 'cl_from' => $this->next ),
+ __METHOD__ . '-1'
);
- while ( $o = $this->dbr->fetchObject( $res ) ) {
- $k = $o->cl_to ;
+ foreach ( $res as $o ) {
+ $k = $o->cl_to;
# Update parent tree
- if ( !isset ( $this->parents[$o->cl_from] ) ) {
- $this->parents[$o->cl_from] = array () ;
+ if ( !isset( $this->parents[$o->cl_from] ) ) {
+ $this->parents[$o->cl_from] = array();
}
- $this->parents[$o->cl_from][$k] = $o ;
+ $this->parents[$o->cl_from][$k] = $o;
# Ignore those we already have
- if ( in_array ( $k , $this->deadend ) ) continue ;
- if ( isset ( $this->name2id[$k] ) ) continue ;
+ if ( in_array( $k, $this->deadend ) ) {
+ continue;
+ }
+
+ if ( isset( $this->name2id[$k] ) ) {
+ continue;
+ }
# Hey, new category!
- $layer[$k] = $k ;
+ $layer[$k] = $k;
}
- $this->dbr->freeResult( $res ) ;
- $this->next = array() ;
+ $this->next = array();
# Find the IDs of all category pages in $layer, if they exist
- if ( count ( $layer ) > 0 ) {
+ if ( count( $layer ) > 0 ) {
$res = $this->dbr->select(
- /* FROM */ 'page',
- /* SELECT */ 'page_id,page_title',
- /* WHERE */ array( 'page_namespace' => NS_CATEGORY , 'page_title' => $layer ),
- $fname."-2"
+ /* FROM */ 'page',
+ /* SELECT */ array( 'page_id', 'page_title' ),
+ /* WHERE */ array( 'page_namespace' => NS_CATEGORY , 'page_title' => $layer ),
+ __METHOD__ . '-2'
);
- while ( $o = $this->dbr->fetchObject( $res ) ) {
- $id = $o->page_id ;
- $name = $o->page_title ;
- $this->name2id[$name] = $id ;
- $this->next[] = $id ;
- unset ( $layer[$name] ) ;
- }
- $this->dbr->freeResult( $res ) ;
+ foreach ( $res as $o ) {
+ $id = $o->page_id;
+ $name = $o->page_title;
+ $this->name2id[$name] = $id;
+ $this->next[] = $id;
+ unset( $layer[$name] );
}
+ }
# Mark dead ends
- foreach ( $layer AS $v ) {
- $this->deadend[$v] = $v ;
+ foreach ( $layer as $v ) {
+ $this->deadend[$v] = $v;
}
}
-} # END OF CLASS "Categoryfinder"
+}
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