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+<?php
+// vim: set et ts=4 sw=4 fdm=marker:
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2004 Manuel Lemos, Tomas V.V.Cox, |
+// | Stig. S. Bakken, Lukas Smith |
+// | All rights reserved. |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB |
+// | API as well as database abstraction for PHP applications. |
+// | This LICENSE is in the BSD license style. |
+// | |
+// | Redistribution and use in source and binary forms, with or without |
+// | modification, are permitted provided that the following conditions |
+// | are met: |
+// | |
+// | Redistributions of source code must retain the above copyright |
+// | notice, this list of conditions and the following disclaimer. |
+// | |
+// | Redistributions in binary form must reproduce the above copyright |
+// | notice, this list of conditions and the following disclaimer in the |
+// | documentation and/or other materials provided with the distribution. |
+// | |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission. |
+// | |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// | OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
+// | POSSIBILITY OF SUCH DAMAGE. |
+// +----------------------------------------------------------------------+
+// | Original QuerySim Concept & ColdFusion Author: Hal Helms |
+// | <hal.helms@teamallaire.com> |
+// | Bert Dawson <bdawson@redbanner.com> |
+// +----------------------------------------------------------------------+
+// | Original PHP Author: Alan Richmond <arichmond@bigfoot.com> |
+// | David Huyck <b@bombusbee.com> |
+// +----------------------------------------------------------------------+
+// | Special note concerning code documentation: |
+// | QuerySim was originally created for use during development of |
+// | applications built using the Fusebox framework. (www.fusebox.org) |
+// | Fusebox uses an XML style of documentation called Fusedoc. (Which |
+// | is admittedly not well suited to documenting classes and functions. |
+// | This short-coming is being addressed by the Fusebox community.) PEAR |
+// | uses a Javadoc style of documentation called PHPDoc. (www.phpdoc.de) |
+// | Since this class extension spans two groups of users, it is asked |
+// | that the members of each respect the documentation standard of the |
+// | other. So it is a further requirement that both documentation |
+// | standards be included and maintained. If assistance is required |
+// | please contact Alan Richmond. |
+// +----------------------------------------------------------------------+
+//
+// $Id$
+//
+
+/*
+<fusedoc fuse="querysim.php" language="PHP">
+ <responsibilities>
+ I take information and turn it into a recordset that can be accessed
+ through the PEAR MDB2 API. Based on Hal Helms' QuerySim.cfm ColdFusion
+ custom tag available at halhelms.com.
+ </responsibilities>
+ <properties>
+ <property name="API" value="PEAR MDB2" />
+ <property name="version" value="0.2.1" />
+ <property name="status" value="beta" />
+ <history author="Hal Helms" email="hal.helms@teamallaire.com" type="Create" />
+ <history author="Bert Dawson" email="bdawson@redbanner.com" type="Update">
+ Extensive revision that is backwardly compatible but eliminates the
+ need for a separate .sim file.
+ </history>
+ <history author="Alan Richmond" email="arichmond@bigfoot.com" type="Create" date="10-July-2002">
+ Rewrote in PHP as an extention to the PEAR DB API.
+ Functions supported:
+ connect, disconnect, query, fetchRow, freeResult,
+ numCols, numRows, getSpecialQuery
+ David Huyck (bombusbee.com) added ability to escape special
+ characters (i.e., delimiters) using a '\'.
+ Extended PEAR DB options[] for adding incoming parameters. Added
+ options: columnDelim, dataDelim, eolDelim
+ </history>
+ <history author="David Huyck" email="b@bombusbee.com" type="Update" date="19-July-2002">
+ Added the ability to set the QuerySim options at runtime.
+ Default options are:
+ 'columnDelim' => ',', // Commas split the column names
+ 'dataDelim' => '|', // Pipes split the data fields
+ 'eolDelim' => chr(13).chr(10) // Carriage returns split the
+ // lines of data
+ Affected functions are:
+ DB_querysim(): set the default options when the
+ constructor method is called
+ _parseQuerySim($query): altered the parsing of lines, column
+ names, and data fields
+ _empty2null: altered the way this function is called
+ to simplify calling it
+ </history>
+ <history author="Alan Richmond" email="arichmond@bigfoot.com" type="Update" date="24-July-2002">
+ Added error catching for malformed QuerySim text.
+ Bug fix _empty2null(): altered version was returning unmodified
+ lineData.
+ Cleanup:
+ PEAR compliant formatting, finished PHPDocs and added 'out' to
+ Fusedoc 'io'.
+ Broke up _parseQuerySim() into _buildResult() and _parseOnDelim()
+ to containerize duplicate parse code.
+ </history>
+ <history author="David Huyck" email="b@bombusbee.com" type="Update" date="25-July-2002">
+ Edited the _buildResult() and _parseOnDelim() functions to improve
+ reliability of special character escaping.
+ Re-introduced a custom setOption() method to throw an error when a
+ person tries to set one of the delimiters to '\'.
+ </history>
+ <history author="Alan Richmond" email="arichmond@bigfoot.com" type="Update" date="27-July-2002">
+ Added '/' delimiter param to preg_quote() in _empty2null() and
+ _parseOnDelim() so '/' can be used as a delimiter.
+ Added error check for columnDelim == eolDelim or dataDelim == eolDelim.
+ Renamed some variables for consistancy.
+ </history>
+ <history author="Alan Richmond" email="arichmond@bigfoot.com" type="Update" date="30-July-2002">
+ Removed protected function _empty2null(). Turns out preg_split()
+ deals with empty elemants by making them zero length strings, just
+ what they ended up being anyway. This should speed things up a little.
+ Affected functions:
+ _parseOnDelim() perform trim on line here, instead of in
+ _empty2null().
+ _buildResult() remove call to _empty2null().
+ _empty2null() removed function.
+ </history>
+ <history author="Alan Richmond" email="arichmond@bigfoot.com" type="Update" date="1-Jan-2003">
+ Ported to PEAR MDB2.
+ Methods supported:
+ connect, query, getColumnNames, numCols, valid, fetch,
+ numRows, free, fetchRow, nextResult, setLimit
+ (inherited).
+ </history>
+ <history
+ Removed array_change_key_case() work around for <4.2.0 in
+ getColumnNames(), found it already done in MDB2/Common.php.
+ </history>
+ <history author="Alan Richmond" email="arichmond@bigfoot.com" type="Update" date="3-Feb-2003">
+ Changed default eolDelim to a *nix file eol, since we're trimming
+ the result anyway, it makes no difference for Windows. Now only
+ Mac file eols should need to be set (and other kinds of chars).
+ </history>
+ <note author="Alan Richmond">
+ Got WAY too long. See querysim_readme.txt for instructions and some
+ examples.
+ io section only documents elements of DB_result that DB_querysim uses,
+ adds or changes; see MDB2 and MDB2_Driver_Common for more info.
+ io section uses some elements that are not Fusedoc 2.0 compliant:
+ object and resource.
+ </note>
+ </properties>
+ <io>
+ <in>
+ <file path="MDB2/Common.php" action="require_once" />
+ </in>
+ <out>
+ <object name="MDB2_querysim" extends="MDB2_Driver_Common" instantiatedby="MDB2::connect()">
+ <resource type="file" name="connection" oncondition="source is external file" scope="class" />
+ <string name="phptype" default="querysim" />
+ <string name="dbsyntax" default="querysim" />
+ <array name="supported" comments="most of these don't actually do anything, they are enabled to simulate the option being available if checked">
+ <boolean name="sequences" default="true" />
+ <boolean name="indexes" default="true" />
+ <boolean name="affected_rows" default="true" />
+ <boolean name="summary_functions" default="true" />
+ <boolean name="order_by_text" default="true" />
+ <boolean name="current_id" default="true" />
+ <boolean name="limit_querys" default="true" comments="this one is functional" />
+ <boolean name="LOBs" default="true" />
+ <boolean name="replace" default="true" />
+ <boolean name="sub_selects" default="true" />
+ <boolean name="transactions" default="true" />
+ </array>
+ <string name="last_query" comments="last value passed in with query()" />
+ <array name="options" comments="these can be changed at run time">
+ <string name="columnDelim" default="," />
+ <string name="dataDelim" default="|" />
+ <string name="eolDelim" default="chr(13).chr(10)" />
+ </array>
+ </object>
+ <array name="result" comments="the simulated record set returned by ::query()">
+ <array comments="columns">
+ <string comments="column name" />
+ </array>
+ <array comments="data">
+ <array comments="row">
+ <string comments="data element" />
+ </array>
+ </array>
+ </array>
+ </out>
+ </io>
+</fusedoc>
+*/
+
+/**
+ * MDB2 QuerySim driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author Alan Richmond <arichmond@bigfoot.com>
+ */
+class MDB2_Driver_querysim extends MDB2_Driver_Common
+{
+ // {{{ properties
+ var $escape_quotes = "\\";
+ // }}}
+
+ // {{{ constructor
+
+ /**
+ * Constructor
+ */
+ function __construct()
+ {
+ parent::__construct();
+
+ $this->phptype = 'querysim';
+ $this->dbsyntax = 'querysim';
+
+ // Most of these are dummies to simulate availability if checked
+ $this->supported['sequences'] = 'emulated';
+ $this->supported['indexes'] = true;
+ $this->supported['affected_rows'] = false;
+ $this->supported['summary_functions'] = false;
+ $this->supported['order_by_text'] = false;
+ $this->supported['current_id'] = 'emulated';
+ $this->supported['limit_queries'] = true;// this one is real
+ $this->supported['LOBs'] = true;
+ $this->supported['replace'] = 'emulated';
+ $this->supported['sub_selects'] = 'emulated';
+ $this->supported['transactions'] = false;
+ $this->supported['auto_increment'] = false;
+ $this->supported['primary_key'] = false;
+
+ $this->options['columnDelim'] = ',';
+ $this->options['dataDelim'] = '|';
+ $this->options['eolDelim'] = "\n";
+ }
+
+ // }}}
+
+ // {{{ connect()
+
+ /**
+ * Open a file or simulate a successful database connect
+ *
+ * @access public
+ *
+ * @return mixed MDB2_OK string on success, a MDB2 error object on failure
+ */
+ function connect()
+ {
+ if (is_resource($this->connection)) {
+ if ($this->connected_database_name == $this->database_name
+ && ($this->opened_persistent == $this->options['persistent'])
+ ) {
+ return MDB2_OK;
+ }
+ if ($this->connected_database_name) {
+ $this->_close($this->connection);
+ }
+ $this->disconnect();
+ }
+
+ $connection = 1;// sim connect
+ // if external, check file...
+ if ($this->database_name) {
+ $file = $this->database_name;
+ if (!file_exists($file)) {
+ return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null, 'file not found');
+ }
+ if (!is_file($file)) {
+ return $this->raiseError(MDB2_ERROR_INVALID, null, null, 'not a file');
+ }
+ if (!is_readable($file)) {
+ return $this->raiseError(MDB2_ERROR_ACCESS_VIOLATION, null, null,
+ 'could not open file - check permissions');
+ }
+ // ...and open if persistent
+ if ($this->options['persistent']) {
+ $connection = @fopen($file, 'r');
+ }
+ }
+ $this->connection = $connection;
+ $this->connected_database_name = $this->database_name;
+ $this->opened_persistent = $this->options['persistent'];
+ $this->dbsyntax = $this->dsn['dbsyntax'] ? $this->dsn['dbsyntax'] : $this->phptype;
+
+ return MDB2_OK;
+ }
+ // }}}
+
+ // {{{ disconnect()
+
+ /**
+ * Log out and disconnect from the database.
+ *
+ * @return mixed true on success, false if not connected and error
+ * object on error
+ * @access public
+ */
+ function disconnect()
+ {
+ if (is_resource($this->connection)) {
+ if (($this->opened_persistent) && (is_resource($this->connection))) {
+ if (!@fclose($this->connection)) {
+ return $this->raiseError();
+ }
+ }
+ $this->connection = 0;
+ }
+ return MDB2_OK;
+ }
+ // }}}
+
+ // {{{ _doQuery()
+
+ /**
+ * Execute a query
+ * @param string $query query
+ * @param boolean $isManip if the query is a manipulation query
+ * @param resource $connection
+ * @param string $database_name
+ * @return result or error object
+ * @access protected
+ */
+ function _doQuery($query, $isManip = false, $connection = null, $database_name = null)
+ {
+ if ($isManip) {
+ return $this->raiseError(MDB2_ERROR_UNSUPPORTED);
+ }
+
+ $this->last_query = $query;
+ $this->debug($query, 'query');
+ if ($this->options['disable_query']) {
+ return null;
+ }
+
+ $result = $this->_buildResult($query);
+ if (PEAR::isError($result)) {
+ return $result;
+ }
+
+ if ($limit > 0) {
+ $result[1] = array_slice($result[1], $offset-1, $limit);
+ }
+ return $result;
+ }
+ // }}}
+
+ // {{{ _readFile()
+
+ /**
+ * Read an external file
+ *
+ * @param string filepath/filename
+ *
+ * @access protected
+ *
+ * @return string the contents of a file
+ */
+ function _readFile()
+ {
+ $buffer = '';
+ if ($this->opened_persistent) {
+ while (!feof($this->connection)) {
+ $buffer.= fgets($this->connection, 1024);
+ }
+ } else {
+ $this->connection = @fopen($this->connected_database_name, 'r');
+ while (!feof($this->connection)) {
+ $buffer.= fgets($this->connection, 1024);
+ }
+ $this->connection = @fclose($this->connection);
+ }
+ return $buffer;
+ }
+ // }}}
+
+ // {{{ _buildResult()
+
+ /**
+ * Convert QuerySim text into an array
+ *
+ * @param string Text of simulated query
+ *
+ * @access protected
+ *
+ * @return multi-dimensional array containing the column names and data
+ * from the QuerySim
+ */
+ function _buildResult($query)
+ {
+ $eolDelim = $this->options['eolDelim'];
+ $columnDelim = $this->options['columnDelim'];
+ $dataDelim = $this->options['dataDelim'];
+
+ $columnNames = array();
+ $data = array();
+
+ if ($columnDelim == $eolDelim) {
+ return $this->raiseError(MDB2_ERROR_INVALID, null, null,
+ 'columnDelim and eolDelim must be different');
+ } elseif ($dataDelim == $eolDelim){
+ return $this->raiseError(MDB2_ERROR_INVALID, null, null,
+ 'dataDelim and eolDelim must be different');
+ }
+
+ $query = trim($query);
+ //tokenize escaped slashes
+ $query = str_replace('\\\\', '[$double-slash$]', $query);
+
+ if (!strlen($query)) {
+ return $this->raiseError(MDB2_ERROR_SYNTAX, null, null,
+ 'empty querysim text');
+ }
+ $lineData = $this->_parseOnDelim($query, $eolDelim);
+ //kill the empty last row created by final eol char if it exists
+ if (!strlen(trim($lineData[count($lineData) - 1]))) {
+ unset($lineData[count($lineData) - 1]);
+ }
+ //populate columnNames array
+ $thisLine = each($lineData);
+ $columnNames = $this->_parseOnDelim($thisLine[1], $columnDelim);
+ if ((in_array('', $columnNames)) || (in_array('NULL', $columnNames))) {
+ return $this->raiseError(MDB2_ERROR_SYNTAX, null, null,
+ 'all column names must be defined');
+ }
+ //replace double-slash tokens with single-slash
+ $columnNames = str_replace('[$double-slash$]', '\\', $columnNames);
+ $columnCount = count($columnNames);
+ $rowNum = 0;
+ //loop through data lines
+ if (count($lineData) > 1) {
+ while ($thisLine = each($lineData)) {
+ $thisData = $this->_parseOnDelim($thisLine[1], $dataDelim);
+ $thisDataCount = count($thisData);
+ if ($thisDataCount != $columnCount) {
+ $fileLineNo = $rowNum + 2;
+ return $this->raiseError(MDB2_ERROR_SYNTAX, null, null,
+ "number of data elements ($thisDataCount) in line $fileLineNo not equal to number of defined columns ($columnCount)");
+ }
+ //loop through data elements in data line
+ foreach ($thisData as $thisElement) {
+ if (strtoupper($thisElement) == 'NULL'){
+ $thisElement = '';
+ }
+ //replace double-slash tokens with single-slash
+ $data[$rowNum][] = str_replace('[$double-slash$]', '\\', $thisElement);
+ }//end foreach
+ ++$rowNum;
+ }//end while
+ }//end if
+ return array($columnNames, $data);
+ }//end function _buildResult()
+ // }}}
+
+ // {{{ _parseOnDelim()
+
+ /**
+ * Split QuerySim string into an array on a delimiter
+ *
+ * @param string $thisLine Text of simulated query
+ * @param string $delim The delimiter to split on
+ *
+ * @access protected
+ *
+ * @return array containing parsed string
+ */
+ function _parseOnDelim($thisLine, $delim)
+ {
+ $delimQuoted = preg_quote($delim, '/');
+ $thisLine = trim($thisLine);
+
+ $parsed = preg_split('/(?<!\\\\)' .$delimQuoted. '/', $thisLine);
+ //replaces escaped delimiters
+ $parsed = preg_replace('/\\\\' .$delimQuoted. '/', $delim, $parsed);
+ if ($delim != $this->options['eolDelim']) {
+ //replaces escape chars
+ $parsed = preg_replace('/\\\\/', '', $parsed);
+ }
+ return $parsed;
+ }
+ // }}}
+}
+
+class MDB2_Result_querysim extends MDB2_Result_Common
+{
+ // }}}
+ // {{{ fetchRow()
+
+ /**
+ * Fetch a row and insert the data into an existing array.
+ *
+ * @param int $fetchmode how the array data should be indexed
+ * @param int $rownum number of the row where the data can be found
+ * @return int data array on success, a MDB2 error on failure
+ * @access public
+ */
+ function &fetchRow($fetchmode = MDB2_FETCHMODE_DEFAULT, $rownum = null)
+ {
+ if (is_null($this->result)) {
+ $err =& $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+ 'fetchRow: resultset has already been freed');
+ return $err;
+ }
+ if (!is_null($rownum)) {
+ $seek = $this->seek($rownum);
+ if (PEAR::isError($seek)) {
+ return $seek;
+ }
+ }
+ $target_rownum = $this->rownum + 1;
+ if ($fetchmode == MDB2_FETCHMODE_DEFAULT) {
+ $fetchmode = $this->db->fetchmode;
+ }
+ if (!isset($this->result[1][$target_rownum])) {
+ $null = null;
+ return $null;
+ }
+ $row = $this->result[1][$target_rownum];
+ // make row associative
+ if ($fetchmode & MDB2_FETCHMODE_ASSOC) {
+ $column_names = $this->getColumnNames();
+ foreach ($column_names as $name => $i) {
+ $column_names[$name] = $row[$i];
+ }
+ $row = $column_names;
+ }
+ if (($mode = ($this->db->options['portability'] & MDB2_PORTABILITY_RTRIM)
+ + ($this->db->options['portability'] & MDB2_PORTABILITY_EMPTY_TO_NULL))
+ ) {
+ $this->db->_fixResultArrayValues($row, $mode);
+ }
+ if (!empty($this->values)) {
+ $this->_assignBindColumns($row);
+ }
+ if (!empty($this->types)) {
+ $row = $this->db->datatype->convertResultRow($this->types, $row);
+ }
+ if ($fetchmode === MDB2_FETCHMODE_OBJECT) {
+ $object_class = $this->db->options['fetch_class'];
+ if ($object_class == 'stdClass') {
+ $row = (object) $row;
+ } else {
+ $row = &new $object_class($row);
+ }
+ }
+ ++$this->rownum;
+ return $row;
+ }
+
+ // }}}
+ // {{{ _getColumnNames()
+
+ /**
+ * Retrieve the names of columns returned by the DBMS in a query result.
+ *
+ * @return mixed an associative array variable
+ * that will hold the names of columns. The
+ * indexes of the array are the column names
+ * mapped to lower case and the values are the
+ * respective numbers of the columns starting
+ * from 0. Some DBMS may not return any
+ * columns when the result set does not
+ * contain any rows.
+ *
+ * a MDB2 error on failure
+ * @access private
+ */
+ function _getColumnNames()
+ {
+ if (is_null($this->result)) {
+ return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+ 'getColumnNames: resultset has already been freed');
+ }
+ $columns = array_flip($this->result[0]);
+ if ($this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+ $columns = array_change_key_case($columns, $this->db->options['field_case']);
+ }
+ return $columns;
+ }
+
+ // }}}
+ // {{{ numCols()
+
+ /**
+ * Count the number of columns returned by the DBMS in a query result.
+ *
+ * @access public
+ * @return mixed integer value with the number of columns, a MDB2 error
+ * on failure
+ */
+ function numCols()
+ {
+ if (is_null($this->result)) {
+ return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+ 'numCols: resultset has already been freed');
+ }
+ $cols = count($this->result[0]);
+ return $cols;
+ }
+}
+
+class MDB2_BufferedResult_querysim extends MDB2_Result_querysim
+{
+ // {{{ seek()
+
+ /**
+ * seek to a specific row in a result set
+ *
+ * @param int $rownum number of the row where the data can be found
+ * @return mixed MDB2_OK on success, a MDB2 error on failure
+ * @access public
+ */
+ function seek($rownum = 0)
+ {
+ if (is_null($this->result)) {
+ return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+ 'seek: resultset has already been freed');
+ }
+ $this->rownum = $rownum - 1;
+ return MDB2_OK;
+ }
+
+ // }}}
+ // {{{ valid()
+
+ /**
+ * check if the end of the result set has been reached
+ *
+ * @return mixed true or false on sucess, a MDB2 error on failure
+ * @access public
+ */
+ function valid()
+ {
+ $numrows = $this->numRows();
+ if (PEAR::isError($numrows)) {
+ return $numrows;
+ }
+ return $this->rownum < ($numrows - 1);
+ }
+
+ // }}}
+ // {{{ numRows()
+
+ /**
+ * returns the number of rows in a result object
+ *
+ * @return mixed MDB2 Error Object or the number of rows
+ * @access public
+ */
+ function numRows()
+ {
+ if (is_null($this->result)) {
+ return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+ 'numRows: resultset has already been freed');
+ }
+ $rows = count($this->result[1]);
+ return $rows;
+ }
+}
+
+
+class MDB2_Statement_querysim extends MDB2_Statement_Common
+{
+
+}
+
+?> \ No newline at end of file