Add a PHP interface to work with the language data

Additional changes in this PR include,

  * Added composer.json
  * Refactored the folder structure.
  * Added editorconfig.
  * Added PHPCS and formatted existing code.
  * Changes to use a single license - GPL-2.0-or-later
  * ESLint related fixes

Bug: T218639

data/ulsdata2json.php

@@ -1,118 +0,0 @@
-<?php
-/**
- * Script to create the language data in JSON format for ULS.
- *
- * Copyright (C) 2012 Alolita Sharma, Amir Aharoni, Arun Ganesh, Brandon Harris,
- * Niklas Laxström, Pau Giner, Santhosh Thottingal, Siebrand Mazeland and other
- * contributors. See CREDITS for a list.
- *
- * UniversalLanguageSelector is dual licensed GPLv2 or later and MIT. You don't
- * have to do anything special to choose one license or the other and you don't
- * have to notify anyone which license you are using. You are free to use
- * UniversalLanguageSelector in commercial projects as long as the copyright
- * header is left intact. See files GPL-LICENSE and MIT-LICENSE for details.
- *
- * @file
- * @ingroup Extensions
- * @licence GNU General Public Licence 2.0 or later
- * @licence MIT License
- */
-
-include __DIR__ . '/spyc.php';
-
-print "Reading langdb.yaml...\n";
-$yamlLangdb = file_get_contents( 'langdb.yaml' );
-$parsedLangdb = spyc_load( $yamlLangdb );
-
-$supplementalDataFilename = 'supplementalData.xml';
-$supplementalDataUrl =
-	"https://raw.githubusercontent.com/unicode-org/cldr/master/common/supplemental/supplementalData.xml";
-
-$curl = curl_init( $supplementalDataUrl );
-$supplementalDataFile = fopen( $supplementalDataFilename, 'w' );
-
-curl_setopt( $curl, CURLOPT_FILE, $supplementalDataFile );
-curl_setopt( $curl, CURLOPT_HEADER, 0 );
-
-print "Trying to download $supplementalDataUrl...\n";
-$curlSuccess = curl_exec( $curl );
-curl_close( $curl );
-fclose( $supplementalDataFile );
-
-if ( !$curlSuccess ) {
-	die( "Failed to download CLDR data from $supplementalDataUrl.\n" );
-}
-print "Downloaded $supplementalDataFilename, trying to parse...\n";
-
-$supplementalData = simplexml_load_file( $supplementalDataFilename );
-
-if ( !( $supplementalData instanceof SimpleXMLElement ) ) {
-	die( "Attempt to load CLDR data from $supplementalDataFilename failed.\n" );
-}
-
-print "CLDR supplemental data parsed successfully, reading territories info...\n";
-$parsedLangdb['territories'] = array();
-
-foreach ( $supplementalData->territoryInfo->territory as $territoryRecord ) {
-	$territoryAtributes = $territoryRecord->attributes();
-	$territoryCodeAttr = $territoryAtributes['type'];
-	$territoryCode = (string) $territoryCodeAttr[0];
-	$parsedLangdb['territories'][$territoryCode] = array();
-
-	foreach ( $territoryRecord->languagePopulation as $languageRecord ) {
-		$languageAttributes = $languageRecord->attributes();
-		$languageCodeAttr = $languageAttributes['type'];
-		// Lower case is a convention for language codes in ULS.
-		// '_' is used in CLDR for compound codes and it's replaced with '-' here.
-
-		$normalisedCode = strtr( strtolower( (string) $languageCodeAttr[0] ), '_', '-' );
-
-		$parsedLangdb['territories'][$territoryCode][] = $normalisedCode;
-
-		// In case of codes with variants, also add the base because ULS might consider
-		// them as separate languages, e.g. zh, zh-hant and zh-hans.
-		if ( strpos( $normalisedCode, '-' ) !== false ) {
-			$parts = explode( '-', $normalisedCode );
-			$parsedLangdb['territories'][$territoryCode][] = $parts[0];
-		}
-	}
-}
-
-foreach ( $parsedLangdb['territories'] as $territoryCode => $languages ) {
-	foreach ( $languages as $index => $language ) {
-		if ( !isset( $parsedLangdb['languages'][$language] ) ) {
-			echo "Unknown language $language for territory $territoryCode\n";
-			unset( $parsedLangdb['territories'][$territoryCode][$index] );
-			continue;
-		}
-
-		$data = $parsedLangdb['languages'][$language];
-		if ( count( $data ) === 1 ) {
-			echo "Redirect for language $language to {$data[0]} territory $territoryCode\n";
-			$parsedLangdb['territories'][$territoryCode][$index] = $data[0];
-			continue;
-		}
-	}
-
-	// Clean-up to save space
-	if ( count( $parsedLangdb['territories'][$territoryCode] ) === 0 ) {
-		unset( $parsedLangdb['territories'][$territoryCode] );
-		continue;
-	}
-
-	// Remove duplicates we might have created
-	$parsedLangdb['territories'][$territoryCode] =
-		array_unique( $parsedLangdb['territories'][$territoryCode] );
-
-
-	// We need to renumber or json conversion thinks these are objects
-	$parsedLangdb['territories'][$territoryCode] =
-		array_values( $parsedLangdb['territories'][$territoryCode] );
-}
-
-print "Writing JSON langdb...\n";
-$jsonVerbose = json_encode( $parsedLangdb, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE );
-// For making diff review easier.
-file_put_contents( '../language-data.json', $jsonVerbose );
-
-print "Done.\n";