toxmlrpc.inc.php

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<?php
    /**
    * Helper functions to convert between ADODB recordset objects and XMLRPC values.
    * Uses John Lim's AdoDB and Edd Dumbill's phpxmlrpc libs
    * 
    * @author Daniele Baroncelli
    * @author Gaetano Giunta
    * @copyright (c) 2003-2004 Giunta/Baroncelli. All rights reserved.
    * 
    * @todo some more error checking here and there
    * @todo document the xmlrpc-struct used to encode recordset info
    * @todo verify if using xmlrpc_encode($rs->GetArray()) would work with:
    *       - ADODB_FETCH_BOTH
    *       - null values
    */

    /**
    * Include the main libraries
    */    
    require_once('xmlrpc.inc');
    if (!defined('ADODB_DIR')) require_once('adodb.inc.php');
            
    /**
    * Builds an xmlrpc struct value out of an AdoDB recordset
    */
    function rs2xmlrpcval(&$adodbrs) {

        $header =& rs2xmlrpcval_header($adodbrs);
        $body =& rs2xmlrpcval_body($adodbrs);

        // put it all together and build final xmlrpc struct
        $xmlrpcrs =& new xmlrpcval ( array(
                "header" => $header,
                "body" => $body,
                ), "struct");

        return $xmlrpcrs;

    }

    /**
    * Builds an xmlrpc struct value describing an AdoDB recordset
    */
    function rs2xmlrpcval_header($adodbrs)
    {
        $numfields = $adodbrs->FieldCount();
        $numrecords = $adodbrs->RecordCount();

        // build structure holding recordset information
        $fieldstruct = array();
        for ($i = 0; $i < $numfields; $i++) {
            $fld = $adodbrs->FetchField($i);
            $fieldarray = array();
            if (isset($fld->name))
                $fieldarray["name"] =& new xmlrpcval ($fld->name);
            if (isset($fld->type))
                $fieldarray["type"] =& new xmlrpcval ($fld->type);
            if (isset($fld->max_length))
                $fieldarray["max_length"] =& new xmlrpcval ($fld->max_length, "int");
            if (isset($fld->not_null))
                $fieldarray["not_null"] =& new xmlrpcval ($fld->not_null, "boolean");
            if (isset($fld->has_default))
                $fieldarray["has_default"] =& new xmlrpcval ($fld->has_default, "boolean");
            if (isset($fld->default_value))
                $fieldarray["default_value"] =& new xmlrpcval ($fld->default_value);
            $fieldstruct[$i] =& new xmlrpcval ($fieldarray, "struct");
        }
        $fieldcount =& new xmlrpcval ($numfields, "int");
        $recordcount =& new xmlrpcval ($numrecords, "int");
        $sql =& new xmlrpcval ($adodbrs->sql);
        $fieldinfo =& new xmlrpcval ($fieldstruct, "array");

        $header =& new xmlrpcval ( array(
                "fieldcount" => $fieldcount,
                "recordcount" => $recordcount,
                "sql" => $sql,
                "fieldinfo" => $fieldinfo
                ), "struct");

        return $header;
    }

    /**
    * Builds an xmlrpc struct value out of an AdoDB recordset
    * (data values only, no data definition)
    */
    function rs2xmlrpcval_body($adodbrs)
    {
        $numfields = $adodbrs->FieldCount();

        // build structure containing recordset data
        $adodbrs->MoveFirst();
        $rows = array();
        while (!$adodbrs->EOF) {
            $columns = array();
            // This should work on all cases of fetch mode: assoc, num, both or default
            if ($adodbrs->fetchMode == 'ADODB_FETCH_BOTH' || count($adodbrs->fields) == 2 * $adodbrs->FieldCount())
                for ($i = 0; $i < $numfields; $i++)
                    if ($adodbrs->fields[$i] === null)
                        $columns[$i] =& new xmlrpcval ('');
                    else
                        $columns[$i] =& xmlrpc_encode ($adodbrs->fields[$i]);
            else
                foreach ($adodbrs->fields as $val)
                    if ($val === null)
                        $columns[] =& new xmlrpcval ('');
                    else
                        $columns[] =& xmlrpc_encode ($val);

            $rows[] =& new xmlrpcval ($columns, "array");

            $adodbrs->MoveNext();
        }
        $body =& new xmlrpcval ($rows, "array");

        return $body;    
    }
    
    /**
    * Returns an xmlrpc struct value as string out of an AdoDB recordset
    */    
    function rs2xmlrpcstring (&$adodbrs) {
        $xmlrpc = rs2xmlrpcval ($adodbrs);
        if ($xmlrpc)
          return $xmlrpc->serialize();
        else
          return null;
    }

    /**
    * Given a well-formed xmlrpc struct object returns an AdoDB object
    * 
    * @todo add some error checking on the input value
    */
    function xmlrpcval2rs (&$xmlrpcval) {

        $fields_array = array();
        $data_array = array();
 
        // rebuild column information  
        $header =& $xmlrpcval->structmem('header');
        
        $numfields = $header->structmem('fieldcount');
        $numfields = $numfields->scalarval();
        $numrecords = $header->structmem('recordcount');
        $numrecords = $numrecords->scalarval();
        $sqlstring = $header->structmem('sql');
        $sqlstring = $sqlstring->scalarval();
        
        $fieldinfo =& $header->structmem('fieldinfo');
        for ($i = 0; $i < $numfields; $i++) {
            $temp =& $fieldinfo->arraymem($i);
            $fld =& new ADOFieldObject();
            while (list($key,$value) = $temp->structeach()) {
                if ($key == "name") $fld->name = $value->scalarval();
                if ($key == "type") $fld->type = $value->scalarval();
                if ($key == "max_length") $fld->max_length = $value->scalarval();
                if ($key == "not_null") $fld->not_null = $value->scalarval();
                if ($key == "has_default") $fld->has_default = $value->scalarval();
                if ($key == "default_value") $fld->default_value = $value->scalarval();
            } // while
            $fields_array[] = $fld;
        } // for

        // fetch recordset information into php array
        $body =& $xmlrpcval->structmem('body');
        for ($i = 0; $i < $numrecords; $i++) {
            $data_array[$i]= array();
            $xmlrpcrs_row =& $body->arraymem($i);
            for ($j = 0; $j < $numfields; $j++) {
                $temp =& $xmlrpcrs_row->arraymem($j);
                $data_array[$i][$j] = $temp->scalarval();
            } // for j
        } // for i

        // finally build in-memory recordset object and return it
        $rs =& new ADORecordSet_array();
        $rs->InitArrayFields($data_array,$fields_array);
        return $rs;

    }

?>