Web service first version.

git-svn-id: http://piwigo.org/svn/trunk@1698 68402e56-0260-453c-a942-63ccdbb3a9ee

1 files changed, 285 insertions, 0 deletions

diff --git a/include/ws_protocols/rest_encoder.php b/include/ws_protocols/rest_encoder.php
new file mode 100644
index 000000000..c66cf2536
--- /dev/null
+++ b/include/ws_protocols/rest_encoder.php
@@ -0,0 +1,285 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | PhpWebGallery - a PHP based picture gallery                           |
+// | Copyright (C) 2003-2007 PhpWebGallery Team - http://phpwebgallery.net |
+// +-----------------------------------------------------------------------+
+// | branch        : BSF (Best So Far)
+// | file          : $URL: svn+ssh://rvelices@svn.gna.org/svn/phpwebgallery/trunk/action.php $
+// | last update   : $Date: 2006-12-21 18:49:12 -0500 (Thu, 21 Dec 2006) $
+// | last modifier : $Author: rvelices $
+// | revision      : $Rev: 1678 $
+// +-----------------------------------------------------------------------+
+// | This program is free software; you can redistribute it and/or modify  |
+// | it under the terms of the GNU General Public License as published by  |
+// | the Free Software Foundation                                          |
+// |                                                                       |
+// | This program is distributed in the hope that it will be useful, but   |
+// | WITHOUT ANY WARRANTY; without even the implied warranty of            |
+// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      |
+// | General Public License for more details.                              |
+// |                                                                       |
+// | You should have received a copy of the GNU General Public License     |
+// | along with this program; if not, write to the Free Software           |
+// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
+// | USA.                                                                  |
+// +-----------------------------------------------------------------------+
+
+
+class PwgXmlWriter
+{
+  var $_indent;
+  var $_indentStr;
+
+  var $_elementStack;
+  var $_lastTagOpen;
+  var $_indentLevel;
+
+  var $_encodedXml;
+
+  function PwgXmlWriter()
+  {
+    $this->_elementStack = array();
+    $this->_lastTagOpen = false;
+    $this->_indentLevel = 0;
+
+    $this->_encodedXml = '';
+    $this->_indent = true;
+    $this->_indentStr = "\t";
+  }
+
+  function &getOutput()
+  {
+    return $this->_encodedXml;
+  }
+
+
+  function start_element($name)
+  {
+    $this->_end_prev(false);
+    if (!empty($this->_elementStack))
+    {
+      $this->_eol_indent();
+    }
+    $this->_indentLevel++;
+    $this->_indent();
+    $this->_output( '<'.$name );
+    $this->_lastTagOpen = true;
+    array_push( $this->_elementStack, $name);
+  }
+
+  function end_element($x)
+  {
+    $close_tag = $this->_end_prev(true);
+    $name = array_pop( $this->_elementStack );
+    if ($close_tag)
+    {
+      $this->_indentLevel--;
+      $this->_indent();
+//      $this->_eol_indent();
+      $this->_output('</'.$name.">");
+    }
+  }
+
+  function write_content($value)
+  {
+    $this->_end_prev(false);
+    $value = (string)$value;
+    $need_cdata = (strpos($value, "\r")!==false)?true:false;
+    if ($need_cdata)
+    {
+      $this->_output( '<![CDATA[' . $value . ']]>' );
+    }
+    else
+    {
+      $this->_output( htmlspecialchars( $value ) );
+    }
+  }
+
+  function write_attribute($name, $value)
+  {
+    $this->_output(' '.$name.'="'.$this->encode_attribute($value).'"');
+  }
+
+  function encode_attribute($value)
+  {
+    return htmlspecialchars( (string)$value);
+  }
+
+  function _end_prev($done)
+  {
+    $ret = true;
+    if ($this->_lastTagOpen)
+    {
+      if ($done)
+      {
+        $this->_indentLevel--;
+        $this->_output( ' />' );
+        //$this->_eol_indent();
+        $ret = false;
+      }
+      else
+      {
+        $this->_output( '>' );
+      }
+      $this->_lastTagOpen = false;
+    }
+    return $ret;
+  }
+
+  function _eol_indent()
+  {
+    if ($this->_indent)
+      $this->_output("\n");
+  }
+
+  function _indent()
+  {
+    if ($this->_indent and
+        $this->_indentLevel > count($this->_elementStack) )
+    {
+      $this->_output(
+        str_repeat( $this->_indentStr, count($this->_elementStack) )
+       );
+    }
+  }
+
+  function _output($raw_content)
+  {
+    $this->_encodedXml .= $raw_content;
+  }
+}
+
+class PwgRestEncoder extends PwgResponseEncoder
+{
+  function encodeResponse($response)
+  {
+    global $lang_info;
+    $respClass = strtolower( get_class($response) );
+    if ($respClass=='pwgerror')
+    {
+      $ret = '<?xml version="1.0"?>
+<rsp stat="fail">
+	<err code="'.$response->code().'" msg="'.htmlspecialchars($response->message()).'" />
+</rsp>';
+      return $ret;
+    }
+
+//parent::flattenResponse($response);
+
+    $this->_writer = new PwgXmlWriter();
+    $this->encode($response);
+    $ret = $this->_writer->getOutput();
+    $ret = '<?xml version="1.0" encoding="'.$lang_info['charset'].'" ?>
+<rsp stat="ok">
+'.$ret.'
+</rsp>';
+
+    return $ret;
+  }
+
+  function getContentType()
+  {
+    return 'text/xml';
+  }
+
+  function encode_array($data, $itemName, $xml_attributes=array())
+  {
+    foreach ($data as $item)
+    {
+      $this->_writer->start_element( $itemName );
+      $this->encode($item, $xml_attributes);
+      $this->_writer->end_element( $itemName );
+    }
+  }
+
+  function encode_struct($data, $skip_underscore, $xml_attributes=array())
+  {
+    foreach ($data as $name => $value)
+    {
+      if (is_numeric($name))
+        continue;
+      if ($skip_underscore and $name[0]=='_')
+        continue;
+      if ( is_null($value) )
+        continue; // null means we dont put it
+      if ( $name==WS_XML_ATTRIBUTES)
+      {
+        foreach ($value as $attr_name => $attr_value)
+        {
+          $this->_writer->write_attribute($attr_name, $attr_value);
+        }
+        unset($data[$name]);
+      }
+      else if ( isset($xml_attributes[$name]) )
+      {
+        $this->_writer->write_attribute($name, $value);
+        unset($data[$name]);
+      }
+    }
+
+    foreach ($data as $name => $value)
+    {
+      if (is_numeric($name))
+        continue;
+      if ($skip_underscore and $name[0]=='_')
+        continue;
+      if ( is_null($value) )
+        continue; // null means we dont put it
+      if ($name!=WS_XML_CONTENT)
+        $this->_writer->start_element($name);
+      $this->encode($value);
+      if ($name!=WS_XML_CONTENT)
+        $this->_writer->end_element($name);
+    }
+  }
+
+  function encode($data, $xml_attributes=array() )
+  {
+    switch (gettype($data))
+    {
+      case 'null':
+      case 'NULL':
+        $this->_writer->write_content('');
+        break;
+      case 'boolean':
+        $this->_writer->write_content($data ? '1' : '0');
+        break;
+      case 'integer':
+      case 'double':
+        $this->_writer->write_content($data);
+        break;
+      case 'string':
+        $this->_writer->write_content($data);
+        break;
+      case 'array':
+        $is_array = range(0, count($data) - 1) === array_keys($data);
+        if ($is_array)
+        {
+          $this->encode_array($data, 'item' );
+        }
+        else
+        {
+          $this->encode_struct($data, false, $xml_attributes);
+        }
+        break;
+      case 'object':
+        switch ( strtolower(get_class($data)) )
+        {
+          case 'pwgnamedarray':
+            $this->encode_array($data->_content, $data->_itemName, $data->_xmlAttributes);
+            break;
+          case 'pwgnamedstruct':
+            $this->encode_array( array($data->_content), $data->_name, $data->_xmlAttributes);
+            break;
+          default:
+            $this->encode_struct(get_object_vars($data), true);
+            break;
+        }
+        break;
+      default:
+        trigger_error("Invalid type ". gettype($data)." ".get_class($data), E_USER_WARNING );
+    }
+  }
+}
+
+?>