LCStoreStaticArray.php

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<?php
class LCStoreStaticArray implements LCStore {
    private $currentLang = null;

    private $data = [];

    private $fname = null;

    private $directory;

    public function __construct( $conf = [] ) {
        global $wgCacheDirectory;

        if ( isset( $conf['directory'] ) ) {
            $this->directory = $conf['directory'];
        } else {
            $this->directory = $wgCacheDirectory;
        }
    }

    public function startWrite( $code ) {
        $this->currentLang = $code;
        $this->fname = $this->directory . '/' . $code . '.l10n.php';
        $this->data[$code] = [];
        if ( file_exists( $this->fname ) ) {
            $this->data[$code] = require $this->fname;
        }
    }

    public function set( $key, $value ) {
        $this->data[$this->currentLang][$key] = self::encode( $value );
    }

    public static function encode( $value ) {
        if ( is_scalar( $value ) || $value === null ) {
            // [V]alue
            return [ 'v', $value ];
        }
        if ( is_object( $value ) ) {
            // [S]erialized
            return [ 's', serialize( $value ) ];
        }
        if ( is_array( $value ) ) {
            // [A]rray
            return [ 'a', array_map( function ( $v ) {
                return LCStoreStaticArray::encode( $v );
            }, $value ) ];
        }

        throw new RuntimeException( 'Cannot encode ' . var_export( $value, true ) );
    }

    public static function decode( array $encoded ) {
        $type = $encoded[0];
        $data = $encoded[1];

        switch ( $type ) {
        case 'v':
            return $data;
        case 's':
            return unserialize( $data );
        case 'a':
            return array_map( function ( $v ) {
                return LCStoreStaticArray::decode( $v );
            }, $data );
        default:
            throw new RuntimeException(
                'Unable to decode ' . var_export( $encoded, true ) );
        }
    }

    public function finishWrite() {
        file_put_contents(
            $this->fname,
            "<?php\n" .
            "// Generated by LCStoreStaticArray.php -- do not edit!\n" .
            "return " .
            var_export( $this->data[$this->currentLang], true ) . ';'
        );
        $this->currentLang = null;
        $this->fname = null;
    }

    public function get( $code, $key ) {
        if ( !array_key_exists( $code, $this->data ) ) {
            $fname = $this->directory . '/' . $code . '.l10n.php';
            if ( !file_exists( $fname ) ) {
                return null;
            }
            $this->data[$code] = require $fname;
        }
        $data = $this->data[$code];
        if ( array_key_exists( $key, $data ) ) {
            return self::decode( $data[$key] );
        }
        return null;
    }
}