MediaWiki Implementation

Note: Version 1.01 of geohashes.php is currently installed on this wiki, as well as Variables.php.

A MediaWiki extension to allow us to handle Geohashes a little nicer and more automatically. Any questions to the talk page here, although I would appreciate a poke on my talk page also.

Note that the whole algorithm is not fully implemented, because those on IRC said that templates could do the rest.

--Edgemaster 21:39, 23 May 2008 (UTC)

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In-wiki Usage

This extension adds two new parser functions: {{#md5}} and {{#dow}}.

#md5

md5s a string, optionally splitting into halves and decimalising.

{{#md5:string|halve|decimal}}

Parameters:

• string: the string to md5
• halve: (optional) splits the hash into two, as required by The Algorithm. 0 = do not half, 1 = first half, 2 = 2nd half. Defaults to 0.
• decimal: (optional) converts the half to decimal if set. Defaults to 0, requires halve to be set to 1 or 2!

Examples:

• {{#md5:testing testing!}}: f9da4c546dff04d46e1fab3ca0456b42
• {{#md5:2005-05-26-10458.68}}: db9318c2259923d08b672cb305440f97
• {{#md5:2005-05-26-10458.68|0}}: db9318c2259923d08b672cb305440f97
• {{#md5:2005-05-26-10458.68|1}}: db9318c2259923d
• {{#md5:2005-05-26-10458.68|2}}: 8b672cb305440f9
• {{#md5:2005-05-26-10458.68|1|1}}: 0.857713267707
• {{#md5:2005-05-26-10458.68|2|1}}: 0.54454306955928

#dow

Fetches the opening Dow Index for a date from the irc.peeron.com service.

{{#dow:year|month|day}}

Parameters:

• year: 4 digit year
• month: month (1 or 2 digits are acceptable)
• day: day (1 or 2 digits are acceptable)

The only validation done is to check the values are non-null. If any of the 3 are null (or all of the 3), then today's date will be used instead. (Always requires the colon to produce a result)

Examples:

• {{#dow:}}:
• {{#dow:2005|05|26}}: 10458.68
• These will fail:
  • (lack of data) {{#dow:1854|05|26}}:
  • (bad syntax) {{#dow}}: {{#dow}}

Variables Extension too plz

Installing

Copy this into a file called $mediwikipath/extensions/Variables/Variables.php:

<?php

if ( !defined( 'MEDIAWIKI' ) ) {
    die( 'This file is a MediaWiki extension, it is not a valid entry point' );
}

$wgExtensionFunctions[] = 'wfSetupVariables';

$wgExtensionCredits['parserhook'][] = array(
	'name' => 'Variables',
	'url' => 'http://www.mediawiki.org/wiki/Extension:VariablesExtension',
	'author' => 'Rob Adams',
	'description' => 'Define page-scoped variables'
);

$wgHooks['LanguageGetMagic'][]       = 'wfVariablesLanguageGetMagic';

class ExtVariables {
    var $mVariables;

    function vardefine( &$parser, $expr = '', $value = '' ) {
	$this->mVariables[$expr] = $value;
	return '';
    }

    function varf( &$parser, $expr = '' ) {
	return $this->mVariables[$expr];
    }
}

function wfSetupVariables() {
    global $wgParser, $wgMessageCache, $wgExtVariables, $wgMessageCache, $wgHooks;

    $wgExtVariables = new ExtVariables;

    $wgParser->setFunctionHook( 'vardefine', array( &$wgExtVariables, 'vardefine' ) );
    $wgParser->setFunctionHook( 'var', array( &$wgExtVariables, 'varf' ) );
}

function wfVariablesLanguageGetMagic( &$magicWords, $langCode = 0 ) {
	require_once( dirname( __FILE__ ) . '/Variables.i18n.php' );
	foreach( efVariablesWords( $langCode ) as $word => $trans )
		$magicWords[$word] = $trans;
	return true;
}

Copy this into a file called $mediwikipath/extensions/Variables/Variables.i18n.php:

<?php

/**
 * Get translated magic words, if available
 *
 * @param string $lang Language code
 * @return array
 */
function efVariablesWords( $lang ) {
	$words = array();

	/**
	 * English
	 */
	$words['en'] = array(
		'var' 		=> array( 0, 'var' ),
		'vardefine' 	=> array( 0, 'vardefine' ),
	);

	# English is used as a fallback, and the English synonyms are
	# used if a translation has not been provided for a given word
	return ( $lang == 'en' || !isset( $words[$lang] ) )
		? $words['en']
		: array_merge( $words['en'], $words[$lang] );
}

Then add

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

to the end of LocalSettings.php.