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<?php |
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namespace Vlaswinkel\Lua; |
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/** |
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* Class Serializer |
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* |
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* @see https://github.com/Sorroko/cclite/blob/62677542ed63bd4db212f83da1357cb953e82ce3/src/lua/rom/apis/textutils |
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* |
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* @author Koen Vlaswinkel <[email protected]> |
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* @package Vlaswinkel\Lua |
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*/ |
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class Serializer { |
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public static function encode($data, $indent = '') { |
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if (is_null($data)) { |
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return self::encodeNull(); |
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} else { |
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if (is_array($data)) { |
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return self::encodeArray($data, $indent); |
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} else { |
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if (is_object($data)) { |
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return self::encodeArray((array)$data, $indent); |
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} else { |
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if (is_string($data)) { |
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return self::encodeString($data); |
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} else { |
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if (is_numeric($data)) { |
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return self::encodeNumber($data); |
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} else { |
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if (is_bool($data)) { |
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return self::encodeBoolean($data); |
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} |
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} |
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} |
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} |
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} |
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} |
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throw new \InvalidArgumentException("Cannot encode type " . get_class($data) . ": " . var_export($data, true)); |
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} |
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private static function encodeArray(array $data, $indent) { |
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if (count($data) === 0) { |
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return '{}'; |
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} |
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$result = "{\n"; |
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$subIndent = $indent . ' '; |
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$seen = []; |
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foreach ($data as $key => $value) { |
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if (is_int($key)) { |
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$seen[$key] = true; |
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$result .= $subIndent . self::encode($value, $subIndent) . ",\n"; |
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} |
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} |
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foreach ($data as $key => $value) { |
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if (!array_key_exists($key, $seen)) { |
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if (is_string($key) |
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&& !in_array($key, Lua::$luaKeywords) |
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&& preg_match('/^[a-zA-Z_][a-zA-Z0-9_]*$/', $key) |
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) { |
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$entry = $key . ' = ' . self::encode($value, $subIndent) . ",\n"; |
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} else { |
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$entry = '[ ' . self::encode($key, $subIndent) . ' ] = ' . self::encode($value, $subIndent) . ",\n"; |
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} |
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$result = $result . $subIndent . $entry; |
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} |
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} |
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$result = $result . $indent . '}'; |
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return $result; |
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} |
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/** |
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* @param $data |
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* |
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* @see http://luaj.cvs.sourceforge.net/viewvc/luaj/luaj-vm/src/core/org/luaj/vm2/lib/StringLib.java?view=markup |
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* @return string |
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*/ |
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private static function encodeString($data) { |
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$data = str_replace(["\n\r", "\r\n"], "\n", $data); |
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$result = '"'; |
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for ($i = 0, $n = strlen($data); $i < $n; $i++) { |
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$char = $data[$i]; |
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switch ($char) { |
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case '"': |
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case "\\": |
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case "\n": |
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$result .= "\\" . $char; |
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break; |
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default: |
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if (($char <= chr(0x1F) || $char == chr(0x7F)) && $char != chr(9)) { |
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$result .= "\\"; |
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if ($i + 1 == $n || $data[$i + 1] < '0' || $data[$i + 1] > '9') { |
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$result .= $char; |
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} else { |
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$result .= '0'; |
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$result .= chr(ord('0') + $char / 10); |
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$result .= chr(ord('0') + $char % 10); |
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} |
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} else { |
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$result .= $char; |
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} |
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} |
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} |
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$result .= '"'; |
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return $result; |
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} |
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private static function encodeNumber($data) { |
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return $data; |
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} |
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private static function encodeBoolean($data) { |
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return $data ? 'true' : 'false'; |
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} |
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private static function encodeNull() { |
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return 'nil'; |
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} |
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} |