lib/php/src/Thrift.php

<?php

/**
 * Copyright (c) 2006- Facebook
 * Distributed under the Thrift Software License
 *
 * See accompanying file LICENSE or visit the Thrift site at:
 * http://developers.facebook.com/thrift/
 *
 * @package thrift
 * @author Mark Slee <mcslee@facebook.com>
 */

/**
 * Data types that can be sent via Thrift
 */
class TType {
  const STOP   = 0;
  const VOID   = 1;
  const BOOL   = 2;
  const BYTE   = 3;
  const I08    = 3;
  const DOUBLE = 4;
  const I16    = 6;
  const I32    = 8;
  const I64    = 10;
  const STRING = 11;
  const UTF7   = 11;
  const STRUCT = 12;
  const MAP    = 13;
  const SET    = 14;
  const LST    = 15;    // N.B. cannot use LIST keyword in PHP!
  const UTF8   = 16;
  const UTF16  = 17;
}

/**
 * Message types for RPC
 */
class TMessageType {
  const CALL  = 1;
  const REPLY = 2;
  const EXCEPTION = 3;
}

/**
 * NOTE(mcslee): This currently contains a ton of duplicated code from TBase
 * because we need to save CPU cycles and this is not yet in an extension.
 * Ideally we'd multiply-inherit TException from both Exception and Base, but
 * that's not possible in PHP and there are no modules either, so for now we
 * apologetically take a trip to HackTown.
 *
 * Can be called with standard Exception constructor (message, code) or with
 * Thrift Base object constructor (spec, vals).
 *
 * @param mixed $p1 Message (string) or type-spec (array)
 * @param mixed $p2 Code (integer) or values (array)
 */
class TException extends Exception {
  function __construct($p1=null, $p2=0) {
    if (is_array($p1) && is_array($p2)) {
      $spec = $p1;
      $vals = $p2;
      foreach ($spec as $fid => $fspec) {
        $var = $fspec['var'];
        if (isset($vals[$var])) {
          $this->$var = $vals[$var];
        }
      }
    } else {
      parent::__construct($p1, $p2);
    }
  }

  static $tmethod = array(TType::BOOL   => 'Bool',
                          TType::BYTE   => 'Byte',
                          TType::I16    => 'I16',
                          TType::I32    => 'I32',
                          TType::I64    => 'I64',
                          TType::DOUBLE => 'Double',
                          TType::STRING => 'String');

  private function _readMap(&$var, $spec, $input) {
    $xfer = 0;
    $ktype = $spec['ktype'];
    $vtype = $spec['vtype'];
    $kread = $vread = null;
    if (isset(TBase::$tmethod[$ktype])) {
      $kread = 'read'.TBase::$tmethod[$ktype];
    } else {
      $kspec = $spec['key'];
    }
    if (isset(TBase::$tmethod[$vtype])) {
      $vread = 'read'.TBase::$tmethod[$vtype];
    } else {
      $vspec = $spec['val'];
    }
    $var = array();
    $_ktype = $_vtype = $size = 0;
    $xfer += $input->readMapBegin($_ktype, $_vtype, $size);
    for ($i = 0; $i < $size; ++$i) {
      $key = $val = null;
      if ($kread !== null) {
        $xfer += $input->$kread($key);
      } else {
        switch ($ktype) {
        case TType::STRUCT:
          $class = $kspec['class'];
          $key = new $class();
          $xfer += $key->read($input);
          break;
        case TType::MAP:
          $xfer += $this->_readMap($key, $kspec, $input);
          break;
        case TType::LST:
          $xfer += $this->_readList($key, $kspec, $input, false);
          break;
        case TType::SET:
          $xfer += $this->_readList($key, $kspec, $input, true);
          break;
        }
      }
      if ($vread !== null) {
        $xfer += $input->$vread($val);
      } else {
        switch ($vtype) {
        case TType::STRUCT:
          $class = $vspec['class'];
          $val = new $class();
          $xfer += $val->read($input);
          break;
        case TType::MAP:
          $xfer += $this->_readMap($val, $vspec, $input);
          break;
        case TType::LST:
          $xfer += $this->_readList($val, $vspec, $input, false);
          break;
        case TType::SET:
          $xfer += $this->_readList($val, $vspec, $input, true);
          break;
        }
      }
      $var[$key] = $val;
    }
    $xfer += $input->readMapEnd();
    return $xfer;
  }

  private function _readList(&$var, $spec, $input, $set=false) {
    $xfer = 0;
    $etype = $spec['etype'];
    $eread = $vread = null;
    if (isset(TBase::$tmethod[$etype])) {
      $eread = 'read'.TBase::$tmethod[$etype];
    } else {
      $espec = $spec['elem'];
    }
    $var = array();
    $_etype = $size = 0;
    if ($set) {
      $xfer += $input->readSetBegin($_etype, $size);
    } else {
      $xfer += $input->readListBegin($_etype, $size);
    }
    for ($i = 0; $i < $size; ++$i) {
      $elem = null;
      if ($eread !== null) {
        $xfer += $input->$eread($elem);
      } else {
        $espec = $spec['elem'];
        switch ($etype) {
        case TType::STRUCT:
          $class = $espec['class'];
          $elem = new $class();
          $xfer += $elem->read($input);
          break;
        case TType::MAP:
          $xfer += $this->_readMap($elem, $espec, $input);
          break;
        case TType::LST:
          $xfer += $this->_readList($elem, $espec, $input, false);
          break;
        case TType::SET:
          $xfer += $this->_readList($elem, $espec, $input, true);
          break;
        }
      }
      if ($set) {
        $var[$elem] = true;
      } else {
        $var []= $elem;
      }
    }
    if ($set) {
      $xfer += $input->readSetEnd();
    } else {
      $xfer += $input->readListEnd();
    }
    return $xfer;
  }

  protected function _read($class, $spec, $input) {
    $xfer = 0;
    $fname = null;
    $ftype = 0;
    $fid = 0;
    $xfer += $input->readStructBegin($fname);
    $fast_binary = (bool)
      is_a($input, 'TBinaryProtocolAccelerated') &&
      function_exists('thrift_protocol_binary_deserialize');

    while (true) {
      $xfer += $input->readFieldBegin($fname, $ftype, $fid);
      if ($ftype == TType::STOP) {
        break;
      }
      if (isset($spec[$fid])) {
        $fspec = $spec[$fid];
        $var = $fspec['var'];
        if ($ftype == $fspec['type']) {
          $xfer = 0;
          if ($fast_binary) {
            $class = isset($fspec['class']) ? $fspec['class'] : '';
            $this->$var = thrift_protocol_binary_deserialize($ftype, $input, $class);
          } else {
            if (isset(TBase::$tmethod[$ftype])) {
              $func = 'read'.TBase::$tmethod[$ftype];
              $xfer += $input->$func($this->$var);
            } else {
              switch ($ftype) {
              case TType::STRUCT:
                $class = $fspec['class'];
                $this->$var = new $class();
                $xfer += $this->$var->read($input);
                break;
              case TType::MAP:
                $xfer += $this->_readMap($this->$var, $fspec, $input);
                break;
              case TType::LST:
                $xfer += $this->_readList($this->$var, $fspec, $input, false);
                break;
              case TType::SET:
                $xfer += $this->_readList($this->$var, $fspec, $input, true);
                break;
              }
            }
          }
        } else {
          $xfer += $input->skip($ftype);
        }
      } else {
        $xfer += $input->skip($ftype);
      }
      $xfer += $input->readFieldEnd();
    }
    $xfer += $input->readStructEnd();
    return $xfer;
  }

  private function _writeMap($var, $spec, $output) {
    $xfer = 0;
    $ktype = $spec['ktype'];
    $vtype = $spec['vtype'];
    $kwrite = $vwrite = null;
    if (isset(TBase::$tmethod[$ktype])) {
      $kwrite = 'write'.TBase::$tmethod[$ktype];
    } else {
      $kspec = $spec['key'];
    }
    if (isset(TBase::$tmethod[$vtype])) {
      $vwrite = 'write'.TBase::$tmethod[$vtype];
    } else {
      $vspec = $spec['val'];
    }
    $xfer += $output->writeMapBegin($ktype, $vtype, count($var));
    foreach ($var as $key => $val) {
      if (isset($kwrite)) {
        $xfer += $output->$kwrite($key);
      } else {
        switch ($ktype) {
        case TType::STRUCT:
          $xfer += $key->write($output);
          break;
        case TType::MAP:
          $xfer += $this->_writeMap($key, $kspec, $output);
          break;
        case TType::LST:
          $xfer += $this->_writeList($key, $kspec, $output, false);
          break;
        case TType::SET:
          $xfer += $this->_writeList($key, $kspec, $output, true);
          break;
        }
      }
      if (isset($vwrite)) {
        $xfer += $output->$vwrite($val);
      } else {
        switch ($vtype) {
        case TType::STRUCT:
          $xfer += $val->write($output);
          break;
        case TType::MAP:
          $xfer += $this->_writeMap($val, $vspec, $output);
          break;
        case TType::LST:
          $xfer += $this->_writeList($val, $vspec, $output, false);
          break;
        case TType::SET:
          $xfer += $this->_writeList($val, $vspec, $output, true);
          break;
        }
      }
    }
    $xfer += $output->writeMapEnd();
    return $xfer;
  }

  private function _writeList($var, $spec, $output, $set=false) {
    $xfer = 0;
    $etype = $spec['etype'];
    $ewrite = null;
    if (isset(TBase::$tmethod[$etype])) {
      $ewrite = 'write'.TBase::$tmethod[$etype];
    } else {
      $espec = $spec['elem'];
    }
    if ($set) {
      $xfer += $output->writeSetBegin($etype, count($var));
    } else {
      $xfer += $output->writeListBegin($etype, count($var));
    }
    foreach ($var as $key => $val) {
      $elem = $set ? $key : $val;
      if (isset($ewrite)) {
        $xfer += $output->$ewrite($elem);
      } else {
        switch ($etype) {
        case TType::STRUCT:
          $xfer += $elem->write($output);
          break;
        case TType::MAP:
          $xfer += $this->_writeMap($elem, $espec, $output);
          break;
        case TType::LST:
          $xfer += $this->_writeList($elem, $espec, $output, false);
          break;
        case TType::SET:
          $xfer += $this->_writeList($elem, $espec, $output, true);
          break;
        }
      }
    }
    if ($set) {
      $xfer += $output->writeSetEnd();
    } else {
      $xfer += $output->writeListEnd();
    }
    return $xfer;
  }

  protected function _write($class, $spec, $output) {
    $xfer = 0;
    $xfer += $output->writeStructBegin($class);
    foreach ($spec as $fid => $fspec) {
      $var = $fspec['var'];
      if ($this->$var !== null) {
        $ftype = $fspec['type'];
        $xfer += $output->writeFieldBegin($var, $ftype, $fid);
        if (isset(TBase::$tmethod[$ftype])) {
          $func = 'write'.TBase::$tmethod[$ftype];
          $xfer += $output->$func($this->$var);
        } else {
          switch ($ftype) {
          case TType::STRUCT:
            $xfer += $this->$var->write($output);
            break;
          case TType::MAP:
            $xfer += $this->_writeMap($this->$var, $fspec, $output);
            break;
          case TType::LST:
            $xfer += $this->_writeList($this->$var, $fspec, $output, false);
            break;
          case TType::SET:
            $xfer += $this->_writeList($this->$var, $fspec, $output, true);
            break;
          }
        }
        $xfer += $output->writeFieldEnd();
      }
    }
    $xfer += $output->writeFieldStop();
    $xfer += $output->writeStructEnd();
    return $xfer;
  }

}

/**
 * Base class from which other Thrift structs extend. This is so that we can
 * cut back on the size of the generated code which is turning out to have a
 * nontrivial cost just to load thanks to the wondrously abysmal implementation
 * of PHP. Note that code is intentionally duplicated in here to avoid making
 * function calls for every field or member of a container..
 */
abstract class TBase {

  static $tmethod = array(TType::BOOL   => 'Bool',
                          TType::BYTE   => 'Byte',
                          TType::I16    => 'I16',
                          TType::I32    => 'I32',
                          TType::I64    => 'I64',
                          TType::DOUBLE => 'Double',
                          TType::STRING => 'String');

  abstract function read($input);

  abstract function write($output);

  public function __construct($spec=null, $vals=null) {
    if (is_array($spec) && is_array($vals)) {
      foreach ($spec as $fid => $fspec) {
        $var = $fspec['var'];
        if (isset($vals[$var])) {
          $this->$var = $vals[$var];
        }
      }
    }
  }

  private function _readMap(&$var, $spec, $input) {
    $xfer = 0;
    $ktype = $spec['ktype'];
    $vtype = $spec['vtype'];
    $kread = $vread = null;
    if (isset(TBase::$tmethod[$ktype])) {
      $kread = 'read'.TBase::$tmethod[$ktype];
    } else {
      $kspec = $spec['key'];
    }
    if (isset(TBase::$tmethod[$vtype])) {
      $vread = 'read'.TBase::$tmethod[$vtype];
    } else {
      $vspec = $spec['val'];
    }
    $var = array();
    $_ktype = $_vtype = $size = 0;
    $xfer += $input->readMapBegin($_ktype, $_vtype, $size);
    for ($i = 0; $i < $size; ++$i) {
      $key = $val = null;
      if ($kread !== null) {
        $xfer += $input->$kread($key);
      } else {
        switch ($ktype) {
        case TType::STRUCT:
          $class = $kspec['class'];
          $key = new $class();
          $xfer += $key->read($input);
          break;
        case TType::MAP:
          $xfer += $this->_readMap($elem, $kspec, $input);
          break;
        case TType::LST:
          $xfer += $this->_readList($elem, $kspec, $input, false);
          break;
        case TType::SET:
          $xfer += $this->_readList($elem, $kspec, $input, true);
          break;
        }
      }
      if ($vread !== null) {
        $xfer += $input->$vread($val);
      } else {
        switch ($vtype) {
        case TType::STRUCT:
          $class = $vspec['class'];
          $val = new $class();
          $xfer += $val->read($input);
          break;
        case TType::MAP:
          $xfer += $this->_readMap($val, $vspec, $input);
          break;
        case TType::LST:
          $xfer += $this->_readList($val, $vspec, $input, false);
          break;
        case TType::SET:
          $xfer += $this->_readList($val, $vspec, $input, true);
          break;
        }
      }
      $var[$key] = $val;
    }
    $xfer += $input->readMapEnd();
    return $xfer;
  }

  private function _readList(&$var, $spec, $input, $set=false) {
    $xfer = 0;
    $etype = $spec['etype'];
    $eread = $vread = null;
    if (isset(TBase::$tmethod[$etype])) {
      $eread = 'read'.TBase::$tmethod[$etype];
    } else {
      $espec = $spec['elem'];
    }
    $var = array();
    $_etype = $size = 0;
    if ($set) {
      $xfer += $input->readSetBegin($_etype, $size);
    } else {
      $xfer += $input->readListBegin($_etype, $size);
    }
    for ($i = 0; $i < $size; ++$i) {
      $elem = null;
      if ($eread !== null) {
        $xfer += $input->$eread($elem);
      } else {
        $espec = $spec['elem'];
        switch ($etype) {
        case TType::STRUCT:
          $class = $espec['class'];
          $elem = new $class();
          $xfer += $elem->read($input);
          break;
        case TType::MAP:
          $xfer += $this->_readMap($key, $espec, $input);
          break;
        case TType::LST:
          $xfer += $this->_readList($key, $espec, $input, false);
          break;
        case TType::SET:
          $xfer += $this->_readList($key, $espec, $input, true);
          break;
        }
      }
      if ($set) {
        $var[$elem] = true;
      } else {
        $var []= $elem;
      }
    }
    if ($set) {
      $xfer += $input->readSetEnd();
    } else {
      $xfer += $input->readListEnd();
    }
    return $xfer;
  }

  protected function _read($class, $spec, $input) {
    $xfer = 0;
    $fname = null;
    $ftype = 0;
    $fid = 0;
    $xfer += $input->readStructBegin($fname);
    $fast_binary = (bool)
      is_a($input, 'TBinaryProtocolAccelerated') &&
      function_exists('thrift_protocol_binary_deserialize');

    while (true) {
      $xfer += $input->readFieldBegin($fname, $ftype, $fid);
      if ($ftype == TType::STOP) {
        break;
      }
      if (isset($spec[$fid])) {
        $fspec = $spec[$fid];
        $var = $fspec['var'];
        if ($ftype == $fspec['type']) {
          $xfer = 0;
          if ($fast_binary) {
            $class = isset($fspec['class']) ? $fspec['class'] : '';
            $this->$var = thrift_protocol_binary_deserialize($ftype, $input, $class);
          } else {
            if (isset(TBase::$tmethod[$ftype])) {
              $func = 'read'.TBase::$tmethod[$ftype];
              $xfer += $input->$func($this->$var);
            } else {
              switch ($ftype) {
              case TType::STRUCT:
                $class = $fspec['class'];
                $this->$var = new $class();
                $xfer += $this->$var->read($input);
                break;
              case TType::MAP:
                $xfer += $this->_readMap($this->$var, $fspec, $input);
                break;
              case TType::LST:
                $xfer += $this->_readList($this->$var, $fspec, $input, false);
                break;
              case TType::SET:
                $xfer += $this->_readList($this->$var, $fspec, $input, true);
                break;
              }
            }
          }
        } else {
          $xfer += $input->skip($ftype);
        }
      } else {
        $xfer += $input->skip($ftype);
      }
      $xfer += $input->readFieldEnd();
    }
    $xfer += $input->readStructEnd();
    return $xfer;
  }

  private function _writeMap($var, $spec, $output) {
    $xfer = 0;
    $ktype = $spec['ktype'];
    $vtype = $spec['vtype'];
    $kwrite = $vwrite = null;
    if (isset(TBase::$tmethod[$ktype])) {
      $kwrite = 'write'.TBase::$tmethod[$ktype];
    } else {
      $kspec = $spec['key'];
    }
    if (isset(TBase::$tmethod[$vtype])) {
      $vwrite = 'write'.TBase::$tmethod[$vtype];
    } else {
      $vspec = $spec['val'];
    }
    $xfer += $output->writeMapBegin($ktype, $vtype, count($var));
    foreach ($var as $key => $val) {
      if (isset($kwrite)) {
        $xfer += $output->$kwrite($key);
      } else {
        switch ($ktype) {
        case TType::STRUCT:
          $xfer += $key->write($output);
          break;
        case TType::MAP:
          $xfer += $this->_writeMap($key, $kspec, $output);
          break;
        case TType::LST:
          $xfer += $this->_writeList($key, $kspec, $output, false);
          break;
        case TType::SET:
          $xfer += $this->_writeList($key, $kspec, $output, true);
          break;
        }
      }
      if (isset($vwrite)) {
        $xfer += $output->$vwrite($val);
      } else {
        switch ($vtype) {
        case TType::STRUCT:
          $xfer += $val->write($output);
          break;
        case TType::MAP:
          $xfer += $this->_writeMap($val, $vspec, $output);
          break;
        case TType::LST:
          $xfer += $this->_writeList($val, $vspec, $output, false);
          break;
        case TType::SET:
          $xfer += $this->_writeList($val, $vspec, $output, true);
          break;
        }
      }
    }
    $xfer += $output->writeMapEnd();
    return $xfer;
  }

  private function _writeList($var, $spec, $output, $set=false) {
    $xfer = 0;
    $etype = $spec['etype'];
    $ewrite = null;
    if (isset(TBase::$tmethod[$etype])) {
      $ewrite = 'write'.TBase::$tmethod[$etype];
    } else {
      $espec = $spec['elem'];
    }
    if ($set) {
      $xfer += $output->writeSetBegin($etype, count($var));
    } else {
      $xfer += $output->writeListBegin($etype, count($var));
    }
    foreach ($var as $key => $val) {
      $elem = $set ? $key : $val;
      if (isset($ewrite)) {
        $xfer += $output->$ewrite($elem);
      } else {
        switch ($etype) {
        case TType::STRUCT:
          $xfer += $elem->write($output);
          break;
        case TType::MAP:
          $xfer += $this->_writeMap($elem, $espec, $output);
          break;
        case TType::LST:
          $xfer += $this->_writeList($elem, $espec, $output, false);
          break;
        case TType::SET:
          $xfer += $this->_writeList($elem, $espec, $output, true);
          break;
        }
      }
    }
    if ($set) {
      $xfer += $output->writeSetEnd();
    } else {
      $xfer += $output->writeListEnd();
    }
    return $xfer;
  }

  protected function _write($class, $spec, $output) {
    $xfer = 0;
    $xfer += $output->writeStructBegin($class);
    foreach ($spec as $fid => $fspec) {
      $var = $fspec['var'];
      if ($this->$var !== null) {
        $ftype = $fspec['type'];
        $xfer += $output->writeFieldBegin($var, $ftype, $fid);
        if (isset(TBase::$tmethod[$ftype])) {
          $func = 'write'.TBase::$tmethod[$ftype];
          $xfer += $output->$func($this->$var);
        } else {
          switch ($ftype) {
          case TType::STRUCT:
            $xfer += $this->$var->write($output);
            break;
          case TType::MAP:
            $xfer += $this->_writeMap($this->$var, $fspec, $output);
            break;
          case TType::LST:
            $xfer += $this->_writeList($this->$var, $fspec, $output, false);
            break;
          case TType::SET:
            $xfer += $this->_writeList($this->$var, $fspec, $output, true);
            break;
          }
        }
        $xfer += $output->writeFieldEnd();
      }
    }
    $xfer += $output->writeFieldStop();
    $xfer += $output->writeStructEnd();
    return $xfer;
  }
}

class TApplicationException extends TException {
  static $_TSPEC =
    array(1 => array('var' => 'message',
                     'type' => TType::STRING),
          2 => array('var' => 'code',
                     'type' => TType::I32));

  const UNKNOWN = 0;
  const UNKNOWN_METHOD = 1;
  const INVALID_MESSAGE_TYPE = 2;
  const WRONG_METHOD_NAME = 3;
  const BAD_SEQUENCE_ID = 4;
  const MISSING_RESULT = 5;

  function __construct($message=null, $code=0) {
    parent::__construct($message, $code);
  }

  public function read($output) {
    return $this->_read('TApplicationException', self::$_TSPEC, $output);
  }

  public function write($output) {
    $xfer = 0;
    $xfer += $output->writeStructBegin('TApplicationException');
    if ($message = $this->getMessage()) {
      $xfer += $output->writeFieldBegin('message', TType::STRING, 1);
      $xfer += $output->writeString($message);
      $xfer += $output->writeFieldEnd();
    }
    if ($code = $this->getCode()) {
      $xfer += $output->writeFieldBegin('type', TType::I32, 2);
      $xfer += $output->writeI32($code);
      $xfer += $output->writeFieldEnd();
    }
    $xfer += $output->writeFieldStop();
    $xfer += $output->writeStructEnd();
    return $xfer;
  }
}

/**
 * Set global THRIFT ROOT automatically via inclusion here
 */
if (!isset($GLOBALS['THRIFT_ROOT'])) {
  $GLOBALS['THRIFT_ROOT'] = dirname(__FILE__);
}
include_once $GLOBALS['THRIFT_ROOT'].'/protocol/TProtocol.php';
include_once $GLOBALS['THRIFT_ROOT'].'/transport/TTransport.php';

?>