<?php
// Copyright (C) 2010 Combodo SARL
//
//   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; version 3 of the License.
//
//   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

/**
 * Specific to the interactive csv import
 *
 * @author      Erwan Taloc <erwan.taloc@combodo.com>
 * @author      Romain Quetiez <romain.quetiez@combodo.com>
 * @author      Denis Flaven <denis.flaven@combodo.com>
 * @license     http://www.opensource.org/licenses/gpl-3.0.html LGPL
 */

require_once('../application/application.inc.php');
require_once('../application/webpage.class.inc.php');
require_once('../application/ajaxwebpage.class.inc.php');
require_once('../application/wizardhelper.class.inc.php');
require_once('../application/ui.linkswidget.class.inc.php');
require_once('../application/csvpage.class.inc.php');

/**
 * Determines if the name of the field to be mapped correspond
 * to the name of an external key or an Id of the given class
 * @param string $sClassName The name of the class
 * @param string $sFieldCode The attribute code of the field , or empty if no match
 * @return bool true if the field corresponds to an id/External key, false otherwise
 */
function IsIdField($sClassName, $sFieldCode)
{
	$bResult = false;
	if (!empty($sFieldCode))
	{
		if ($sFieldCode == 'id')
		{
			$bResult = true;
		}
		else if (strpos($sFieldCode, '->') === false)
		{
			$oAttDef = MetaModel::GetAttributeDef($sClassName, $sFieldCode);
			$bResult = $oAttDef->IsExternalKey();
		}
	}
	return $bResult;
}

/**
 * Get all the fields xxx->yyy based on the field xxx which is an external key
 * @param string $sExtKeyAttCode Attribute code of the external key
 * @return Ash List of codes=>display name: xxx->yyy where yyy are the reconciliation keys for the object xxx 
 */
function GetMappingsForExtKey($sAttCode, AttributeDefinition $oExtKeyAttDef)
{
	$aResult = array();
	$sTargetClass = $oExtKeyAttDef->GetTargetClass();
	foreach(MetaModel::ListAttributeDefs($sTargetClass) as $sTargetAttCode => $oTargetAttDef)
	{
		if (MetaModel::IsReconcKey($sTargetClass, $sTargetAttCode))
		{
			$aResult[$sAttCode.'->'.$sTargetAttCode] = $oExtKeyAttDef->GetLabel().'->'.$oTargetAttDef->GetLabel();
		}
	}
	return $aResult;	
}

/**
 * Helper function to build the mapping drop-down list for a field
 * Spec: Possible choices are "writable" fields in this class plus external fields that are listed as reconciliation keys
 *       for any class pointed to by an external key in the current class.
 *       If not in advanced mode, all "id" fields (id and external keys) must be mapped to ":none:" (i.e -- ignore this field --)
 *       External fields that do not correspond to a reconciliation key must be mapped to ":none:"
 *       Otherwise, if a field equals either the 'code' or the 'label' (translated) of a field, then it's mapped automatically
 * @param string $sClassName Name of the class used for the mapping
 * @param string $sFieldName Name of the field, as it comes from the data file (header line)
 * @param integer $iFieldIndex Number of the field in the sequence
 * @param bool $bAdvancedMode Whether or not advanced mode was chosen
 * @return string The HTML code corresponding to the drop-down list for this field
 */
function GetMappingForField($sClassName, $sFieldName, $iFieldIndex, $bAdvancedMode = false)
{
	$aChoices = array('' => Dict::S('UI:CSVImport:MappingSelectOne'));
	$aChoices[':none:'] = Dict::S('UI:CSVImport:MappingNotApplicable');
	$sFieldCode = ''; // Code of the attribute, if there is a match
	if ($sFieldName == 'id')
	{
		$sFieldCode = 'id';
	}
	if ($bAdvancedMode)
	{
		$aChoices['id'] = Dict::S('UI:CSVImport:idField');
	}
	foreach(MetaModel::ListAttributeDefs($sClassName) as $sAttCode => $oAttDef)
	{
		if ($oAttDef->IsExternalKey())
		{
			if ( ($sFieldName == $oAttDef->GetLabel()) || ($sFieldName == $sAttCode))
			{
				$sFieldCode = $sAttCode;
			}
			if ($bAdvancedMode)
			{
				$aChoices[$sAttCode] = $oAttDef->GetLabel();
			}
			// Get fields of the external class that are considered as reconciliation keys
			$sTargetClass = $oAttDef->GetTargetClass();
			foreach(MetaModel::ListAttributeDefs($sTargetClass) as $sTargetAttCode => $oTargetAttDef)
			{
				if (MetaModel::IsReconcKey($sTargetClass, $sTargetAttCode))
				{
					$aChoices[$sAttCode.'->'.$sTargetAttCode] = $oAttDef->GetLabel().'->'.$oTargetAttDef->GetLabel();
					if ((strcasecmp($sFieldName, $aChoices[$sAttCode.'->'.$sTargetAttCode]) == 0) || (strcasecmp($sFieldName, ($sAttCode.'->'.$sTargetAttCode)) == 0) )
					{
						$sFieldCode = $sAttCode.'->'.$sTargetAttCode;
					}
				}
			}
		}
		else if ( ($oAttDef->IsWritable()) && (!$oAttDef->IsLinkSet()) )
		{
			$aChoices[$sAttCode] = $oAttDef->GetLabel();
			if ( ($sFieldName == $oAttDef->GetLabel()) || ($sFieldName == $sAttCode))
			{
				$sFieldCode = $sAttCode;
			}
		}		
	}
	asort($aChoices);
	
	$sHtml = "<select id=\"mapping_{$iFieldIndex}\" name=\"field[$iFieldIndex]\">\n";
	$bIsIdField = IsIdField($sClassName, $sFieldCode);
	foreach($aChoices as $sAttCode => $sLabel)
	{
		$sSelected = '';
		if ($bIsIdField && (!$bAdvancedMode)) // When not in advanced mode, ID are mapped to n/a
		{
			if ($sAttCode == ':none:')
			{
				$sSelected = ' selected';
			}
		}
		else if (empty($sFieldCode) && (strpos($sFieldName, '->') !== false))
		{
			if ($sAttCode == ':none:')
			{
				$sSelected = ' selected';
			}
		}
		else if ($sFieldCode == $sAttCode) // Otherwise map by default if there is a match
		{
			$sSelected = ' selected';
		}

		$sHtml .= "<option value=\"$sAttCode\"$sSelected>$sLabel</option>\n";
	}
	$sHtml .= "</select>\n";
	return $sHtml;
}

require_once('../application/startup.inc.php');
session_start();
if (isset($_SESSION['auth_user']))
{
	$sAuthUser = $_SESSION['auth_user'];
	$sAuthPwd = $_SESSION['auth_pwd'];
	// Attempt to login, fails silently
	UserRights::Login($sAuthUser, $sAuthPwd);
}
else
{
	// No session information
	echo "<p>No session information</p>\n";
}


$oContext = new UserContext();
$sOperation = utils::ReadParam('operation', '');

switch($sOperation)
{
	case 'parser_preview':
	$oPage = new ajax_page("");
	$oPage->no_cache();
	$sSeparator = utils::ReadParam('separator', ',');
	if ($sSeparator == 'tab') $sSeparator = "\t";
	$sTextQualifier = utils::ReadParam('qualifier', '"');
	$iLinesToSkip = utils::ReadParam('nb_lines_skipped', 0);
	$bFirstLineAsHeader = utils::ReadParam('header_line', true);
	$sData = stripslashes(utils::ReadParam('csvdata', true));
	$oCSVParser = new CSVParser($sData, $sSeparator, $sTextQualifier);
	$aData = $oCSVParser->ToArray($iLinesToSkip);
	$iTarget = count($aData);
	if ($iTarget == 0)
	{
		$oPage->p(Dict::S('UI:CSVImport:NoData'));
	}
	else
	{
		$sMaxLen = (strlen(''.$iTarget) < 3) ? 3 : strlen(''.$iTarget); // Pad line numbers to the appropriate number of chars, but at least 3
		$sFormat = '%0'.$sMaxLen.'d';
		$oPage->p("<h3>".Dict::S('UI:Title:DataPreview')."</h3>\n");
		$oPage->p("<div style=\"overflow-y:auto\" class=\"white\">\n");
		$oPage->add("<table cellspacing=\"0\" style=\"overflow-y:auto\">");
		$iMaxIndex= 10; // Display maximum 10 lines for the preview
		$index = 1;
		foreach($aData as $aRow)
		{
			$sCSSClass = 'csv_row'.($index % 2);
			if ( ($bFirstLineAsHeader) && ($index == 1))
			{
				$oPage->add("<tr class=\"$sCSSClass\"><td style=\"border-left:#999 3px solid;padding-right:10px;padding-left:10px;\">".sprintf($sFormat, $index)."</td><th>");
				$oPage->add(implode('</th><th>', $aRow));
				$oPage->add("</th></tr>\n");
				$iNbCols = count($aRow);
								
			}
			else
			{
				if ($index == 1) $iNbCols = count($aRow);
				$oPage->add("<tr class=\"$sCSSClass\"><td style=\"border-left:#999 3px solid;padding-right:10px;padding-left:10px;\">".sprintf($sFormat, $index)."</td><td>");
				$oPage->add(implode('</td><td>', $aRow));
				$oPage->add("</td></tr>\n");
			}
			$index++;
			if ($index > $iMaxIndex) break;
		}
		$oPage->add("</table>\n");
		$oPage->add("</div>\n");
		if($iNbCols == 1)
		{
			$oPage->p('<img src="../images/error.png">&nbsp;'.Dict::S('UI:CSVImport:ErrorOnlyOneColumn'));
		}
		else
		{
			$oPage->p('&nbsp;');
		}
	}
	break;

	case 'display_mapping_form':
	$oPage = new ajax_page("");
	$oPage->no_cache();
	$sSeparator = utils::ReadParam('separator', ',');
	$sTextQualifier = utils::ReadParam('qualifier', '"');
	$iLinesToSkip = utils::ReadParam('nb_lines_skipped', 0);
	$bFirstLineAsHeader = utils::ReadParam('header_line', true);
	$sData = stripslashes(utils::ReadParam('csvdata', true));
	$sClassName = utils::ReadParam('class_name', '');
	$bAdvanced = utils::ReadParam('advanced', false);
	
	$oCSVParser = new CSVParser($sData, $sSeparator, $sTextQualifier);
	$aData = $oCSVParser->ToArray($iLinesToSkip);
	$iTarget = count($aData);
	if ($iTarget == 0)
	{
		$oPage->p(Dict::S('UI:CSVImport:NoData'));
	}
	else
	{
		$oPage->add("<table>");
		$index = 1;
		$aFirstLine = $aData[0]; // Use the first row to determine the number of columns
		$iStartLine = 0;
		$iNbColumns = count($aFirstLine);
		if ($bFirstLineAsHeader)
		{			$iStartLine = 1;
			foreach($aFirstLine as $sField)
			{
				$aHeader[] = $sField;
			}
		}
		else
		{
			// Build some conventional name for the fields: field1...fieldn
			$index= 1;
			foreach($aFirstLine as $sField)
			{
				$aHeader[] = Dict::Format('UI:CSVImport:FieldName', $index);
				$index++;
			}
		}
		$oPage->add("<table>\n");
		$oPage->add('<tr>');
		$oPage->add('<th>'.Dict::S('UI:CSVImport:HeaderFields').'</th><th>'.Dict::S('UI:CSVImport:HeaderMappings').'</th><th>&nbsp;</th><th>'.Dict::S('UI:CSVImport:HeaderSearch').'</th><th>'.Dict::S('UI:CSVImport:DataLine1').'</th><th>'.Dict::S('UI:CSVImport:DataLine2').'</th>');
		$oPage->add('</tr>');
		foreach($aHeader as $sField)
		{
			$oPage->add('<tr>');
			$oPage->add("<th>$sField</th>");
			$oPage->add('<td>'.GetMappingForField($sClassName, $sField, $index, $bAdvanced).'</td>');
			$oPage->add('<td>&nbsp;</td>');
			$oPage->add('<td><input id="search_'.$index.'" type="checkbox" name="search_field['.$index.']" value="1" /></td>');
			$oPage->add('<td>'.(isset($aData[$iStartLine][$index-1]) ? htmlentities($aData[$iStartLine][$index-1], ENT_QUOTES, 'UTF-8') : '&nbsp;').'</td>');
			$oPage->add('<td>'.(isset($aData[$iStartLine+1][$index-1]) ? htmlentities($aData[$iStartLine+1][$index-1], ENT_QUOTES, 'UTF-8') : '&nbsp;').'</td>');
			$oPage->add('</tr>');
			$index++;
		}
		$oPage->add("</table>\n");
		$aReconciliationKeys = MetaModel::GetReconcKeys($sClassName);
		$aMoreReconciliationKeys = array();
		foreach($aReconciliationKeys as $sAttCode)
		{
			$oAttDef = MetaModel::GetAttributeDef($sClassName, $sAttCode);
			if ($oAttDef->IsExternalKey())
			{
				$aMoreReconciliationKeys = array_keys(GetMappingsForExtKey($sAttCode, $oAttDef));
			}
		}
		$sDefaultKeys = '"'.implode('", "',array_merge($aReconciliationKeys,$aMoreReconciliationKeys)).'"';
		$oPage->add_ready_script(
<<<EOF
		$('select[name^=field]').change( DoCheckMapping );
		aDefaultKeys = new Array($sDefaultKeys);
		DoCheckMapping();
EOF
);	
	}
	break;
	
	case 'get_csv_template':
	$sClassName = utils::ReadParam('class_name');
	$oSearch = new DBObjectSearch($sClassName);
	$oSearch->AddCondition('id', 0, '='); // Make sure we create an empty set
	$oSet = new CMDBObjectSet($oSearch);
	$sResult = cmdbAbstractObject::GetSetAsCSV($oSet);
	//$aCSV = explode("\n", $sCSV);
	// If there are more than one line, let's assume that the first line is a comment and skip it.
	//if (count($aCSV) > 1)
	//{
	//	$sResult = $aCSV[0];
	//}
	//else
	//{
	//	$sResult = $sCSV;
	//}

	$sClassDisplayName = MetaModel::GetName($sClassName);
	$sDisposition = utils::ReadParam('disposition', 'inline');
	if ($sDisposition == 'attachment')
	{
		$oPage = new CSVPage("");
		$oPage->add_header("Content-disposition: attachment; filename=\"{$sClassDisplayName}.csv\"");
		$oPage->no_cache();		
		$oPage->add($sResult);	
	}
	else
	{
		$oPage = new ajax_page("");
		$oPage->no_cache();
		$oPage->add('<p style="text-align:center"><a style="text-decoration:none" href="../pages/ajax.csvimport.php?operation=get_csv_template&disposition=attachment&class_name='.$sClassName.'"><img border="0" src="../images/csv.png"><br/>'.$sClassDisplayName.'.csv</a></p>');		
		$oPage->add('<p><textarea rows="5" cols="100">'.$sResult.'</textarea></p>');
	}
	break;
}
$oPage->output();
?>