StaticArrayWriter.php

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<?php
namespace Wikimedia;
 
class StaticArrayWriter {
    public function create( array $data, $header = 'Automatically generated' ) {
        return self::write( $data, $header );
    }
 
    public static function write( array $data, $header ) {
        $code = "<?php\n"
            . "// " . implode( "\n// ", explode( "\n", $header ) ) . "\n"
            . "return [\n";
        foreach ( $data as $key => $value ) {
            $code .= self::encodePair( $key, $value, 1 );
        }
        $code .= "];\n";
        return $code;
    }
 
    public static function writeClass( array $data, array $layout ) {
        $code = "<?php\n"
            . "// " . implode( "\n// ", explode( "\n", $layout['header'] ) ) . "\n"
            . "\n"
            . "namespace {$layout['namespace']};\n"
            . "\n"
            . "class {$layout['class']} {\n"
            . "\tpublic const {$layout['const']} = [\n";
        foreach ( $data as $key => $value ) {
            $code .= self::encodePair( $key, $value, 2 );
        }
        $code .= "\t];\n}\n";
        return $code;
    }
 
    private static function encodePair( $key, $value, $indent = 0 ) {
        $tabs = str_repeat( "\t", $indent );
        $line = $tabs . var_export( $key, true ) . ' => ';
        $line .= self::encodeValue( $value, $indent );
 
        $line .= ",\n";
        return $line;
    }
 
    public static function encodeValue( $value, $indent = 0 ) {
        if ( is_array( $value ) ) {
            $tabs = str_repeat( "\t", $indent );
            $line = "[\n";
            foreach ( $value as $subkey => $subvalue ) {
                $line .= self::encodePair( $subkey, $subvalue, $indent + 1 );
            }
            $line .= "$tabs]";
            return $line;
        } else {
            $exportedValue = var_export( $value, true );
            if ( $exportedValue === 'NULL' ) {
                // var_export() exports nulls as uppercase NULL which
                // violates our own coding standards.
                $exportedValue = 'null';
            }
            return $exportedValue;
        }
    }
}