Extension:StringLoop

MediaWiki extensions manual

StringLoop Release status: unmaintained
Implementation	Parser function
Description	This extension implements for loops in the style of the Bourne shell.
Author(s)	Robert Paciorek (berciktalk)
Latest version	1.0 (2010-08-14)
MediaWiki	1.15
License	GNU General Public License 3.0
Download	below
Hooks used LanguageGetMagic

What can this extension do?

This extension implements for loops in the style of the Bourne shell. For any words in "input list" (separated by "input_list_separator" - default space) this word is substituted for variable "variable_name" and is inserting "wiki code".

"wiki code" can use variable value by:

{{ #var: variable_name }}

Usage

{{#string_loop:variable_name|input list|wiki code|input_list_separator}}

input_list_separator is optional and default is space.

Example

{{#string_loop:v|a b c|[[{{ #var: v }}]] <nowiki/>}}

generated:

[[a]] [[b]] [[c]]

Download instructions

Please cut and paste the code found below and place it in $IP/extensions/StringLoop/StringLoop.php. Note: $IP stands for the root directory of your MediaWiki installation, the same directory that holds LocalSettings.php .

Installation

This extension require VariablesExtension to be installed. To install this extension, add the following to LocalSettings.php :

require_once("$IP/extensions/StringLoop/StringLoop.php");

Code

<?php

/**
 * This extension implements for loops in the style of the Bourne shell.
 * For any words in "input list" (separated by "input_list_separator" - default space)
 * this word is substituted for variable "variable_name" and is inserting "wiki code".
 * "wiki code" can use variable value by "{{ #var: variable_name }}"
 *
 * Extensions can by used to parse a template argument which is a list.
 *
 * INSTALATION:
 *	1. install VariablesExtension - http://www.mediawiki.org/wiki/Extension:VariablesExtension
 *	2. put this file (StringLoop.php) to PATH_TO_YOUR_WIKI//extensions/StringLoop/
 *	3. add to LocalSettings.php
 *		require_once("$IP/extensions/StringLoop/StringLoop.php");
 *
 * USAGE:
 *	{{#string_loop:variable_name|input list|wiki code|input_list_separator}}
 *		input_list_separator is optional and default is space
 *
 * EXAMPLE:
 *	{{#string_loop:v|a b c|[[{{ #var: v }}]] <nowiki/>}}
 *	generated: [[a]] [[b]] [[c]]
 *
 *
 * COPYRIGHT (c) 2010, Robert Paciorek (http://www.opcode.eu.org/), GNU GPL v 3.0
 *
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * some code fragmets inspired by Loops extensions by David M. Sledge
 *  (http://www.mediawiki.org/wiki/Extension:Loops)
 *
**/


$wgExtensionFunctions[] = 'StringLoop::register';
$wgExtensionCredits['parserhook'][] = array(
    'name' => 'StringLoop',
    'author' => 'Robert paciorek',
    'url' => 'http://opcode.eu.org/',
);
$wgHooks['LanguageGetMagic'][]       = "StringLoop::setMagicWords";

class StringLoop {
	public static function register() {
		global $wgParser;
		$wgParser->setFunctionHook( 'string_loop', array( 'StringLoop', 'string_loop' ), SFH_OBJECT_ARGS );
		return true;
	}

	public static function setMagicWords( &$magicWords, $langCode ) {
		$magicWords['string_loop'] = array( 0, 'string_loop' );
		return true;
	}

	public function string_loop(&$parser, $frame, $args) {
		global $wgExtVariables;

		$varName=array_shift( $args );
        	$varName = $varName === null ? '' : trim( $frame->expand( $varName ) );
		$input_str=array_shift( $args );
        	$input_str = $input_str === null ? '' : trim( $frame->expand( $input_str ) );
		$loopStatement=array_shift( $args );
		$delimiter=array_shift( $args );
		$delimiter = $delimiter === null ? ' ' : $delimiter;
		$output='';

		$words = explode($delimiter, $input_str);
		foreach ( $words as $word ) {
			$wgExtVariables->vardefine( $parser, $varName, "$word" );
			
			$output .= isset( $loopStatement ) ?
				trim( $frame->expand( $loopStatement ) ) : '';
		}
		
		return $output;
	}
}