<?php
	/**************************************************************************\
	* eGroupWare - Calendar: CSV - Import                                      *
	* http://www.egroupware.org                                                *
	* Written by Ralf Becker <RalfBecker@outdoor-training.de>                  *
	* --------------------------------------------                             *
	*  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; either version 2 of the License, or (at your  *
	*  option) any later version.                                              *
	\**************************************************************************/

	/* $Id$ */

	$GLOBALS['egw_info']['flags'] = array(
		'currentapp' => 'calendar',
		'noheader'   => True
	);
	include('../header.inc.php');

	$is_admin = isset($GLOBALS['egw_info']['user']['apps']['admin']) && $GLOBALS['egw_info']['user']['apps']['admin'];

	if (isset($_FILES['csvfile']['tmp_name']))
	{
		$csvfile = tempnam($GLOBALS['egw_info']['server']['temp_dir'],$GLOBALS['egw_info']['flags']['currentapp']."_");
		$GLOBALS['egw']->session->appsession('csvfile','',$csvfile);
		$_POST['action'] = move_uploaded_file($_FILES['csvfile']['tmp_name'],$csvfile) ?
			'download' : '';
	}
	else
	{
		$csvfile = $GLOBALS['egw']->session->appsession('csvfile');
	}
	if ($_POST['cancel'])
	{
		@unlink($csvfile);
		$GLOBALS['egw']->redirect_link('/admin/index.php');
	}
	$GLOBALS['egw_info']['flags']['app_header'] = $GLOBALS['egw_info']['apps']['calendar']['title'].' - '.lang('Import CSV-File');
	$cal =& CreateObject('calendar.uical',true);
	$GLOBALS['egw']->common->egw_header();

	$GLOBALS['egw']->template->set_file(array('import_t' => 'csv_import.tpl'));
	$GLOBALS['egw']->template->set_block('import_t','filename','filenamehandle');
	$GLOBALS['egw']->template->set_block('import_t','fheader','fheaderhandle');
	$GLOBALS['egw']->template->set_block('import_t','fields','fieldshandle');
	$GLOBALS['egw']->template->set_block('import_t','ffooter','ffooterhandle');
	$GLOBALS['egw']->template->set_block('import_t','imported','importedhandle');
	$GLOBALS['egw']->template->set_block('import_t','import','importhandle');

	if(($_POST['action'] == 'download' || $_POST['action'] == 'continue') && (!$_POST['fieldsep'] || !$csvfile || !($fp=fopen($csvfile,'rb'))))
	{
		$_POST['action'] = '';
	}
	$GLOBALS['egw']->template->set_var("action_url",$GLOBALS['egw']->link("/calendar/csv_import.php"));

	$PSep = '||'; // Pattern-Separator, separats the pattern-replacement-pairs in trans
	$ASep = '|>'; // Assignment-Separator, separats pattern and replacesment
	$VPre = '|#'; // Value-Prefix, is expanded to \ for ereg_replace
	$CPre = '|['; $CPreReg = '\|\['; // |{csv-fieldname} is expanded to the value of the csv-field
	$CPos = ']';  $CPosReg = '\]';	// if used together with @ (replacement is eval-ed) value gets autom. quoted

	function addr_id( $n_family,$n_given,$org_name )
	{		// find in Addressbook, at least n_family AND (n_given OR org_name) have to match
		$contacts =& CreateObject('phpgwapi.contacts');

		$addrs = $contacts->read(0,0,array('id'),'',"n_family=$n_family,n_given=$n_given,org_name=$org_name");
		if(!count($addrs))
		{
			$addrs = $contacts->read(0,0,array('id'),'',"n_family=$n_family,n_given=$n_given");
		}
		if(!count($addrs))
		{
			$addrs = $contacts->read(0,0,array('id'),'',"n_family=$n_family,org_name=$org_name");
		}

		if (count($addrs))
		{
			return $addrs[0]['id'];
		}

		return False;
	}

	$cat2id = array( );

	function cat_id($cats)
	{
		if (!$cats)
		{
			return '';
		}

		foreach(split('[,;]',$cats) as $cat)
		{
			if (isset($cat2id[$cat]))
			{
				$ids[$cat] = $cat2id[$cat];	// cat is in cache
			}
			else
			{
				if (is_numeric($cat) && $GLOBALS['egw']->categories->id2name($cat) != '--')
				{
					$cat2id[$cat] = $ids[$cat] = $cat;
				}	
				elseif ($id = $GLOBALS['egw']->categories->name2id( addslashes($cat) ))
				{	// cat exists
					$cat2id[$cat] = $ids[$cat] = $id;
				}
				else
				{	// create new cat
					$GLOBALS['egw']->categories->add( array('name' => $cat,'descr' => $cat ));
					$cat2id[$cat] = $ids[$cat] = $GLOBALS['egw']->categories->name2id( addslashes($cat) );
				}
			}
		}
		return implode( ',',$ids );
	}

	if ($_POST['next']) $_POST['action'] = 'next';
	switch ($_POST['action'])
	{
	case '':	// Start, ask Filename
		$GLOBALS['egw']->template->set_var('lang_csvfile',lang('CSV-Filename'));
		$GLOBALS['egw']->template->set_var('lang_fieldsep',lang('Fieldseparator'));
		$GLOBALS['egw']->template->set_var('lang_charset',lang('Charset of file'));
		$GLOBALS['egw']->template->set_var('lang_help',lang('Please note: You can configure the field assignments AFTER you uploaded the file.'));
		$GLOBALS['egw']->template->set_var('select_charset',
			html::select('charset','',
			$GLOBALS['egw']->translation->get_installed_charsets()+
			array('utf-8' => 'utf-8 (Unicode)'),True));
		$GLOBALS['egw']->template->set_var('fieldsep',$_POST['fieldsep'] ? $_POST['fieldsep'] : ';');
		$GLOBALS['egw']->template->set_var('submit',lang('Import'));
		$GLOBALS['egw']->template->set_var('enctype','ENCTYPE="multipart/form-data"');

		$GLOBALS['egw']->template->parse('rows','filename');
		break;

	case 'continue':
	case 'download':
		$GLOBALS['egw']->preferences->read_repository();
		$defaults = $GLOBALS['egw_info']['user']['preferences']['calendar']['cvs_import'];
		if (!is_array($defaults))
		{
			$defaults = array();
		}
		$GLOBALS['egw']->template->set_var('lang_csv_fieldname',lang('CSV-Fieldname'));
		$GLOBALS['egw']->template->set_var('lang_info_fieldname',lang('calendar-Fieldname'));
		$GLOBALS['egw']->template->set_var('lang_translation',lang("Translation").' <a href="#help">'.lang('help').'</a>');
		$GLOBALS['egw']->template->set_var('submit',
			html::submit_button('convert','Import') . '&nbsp;'.
			html::submit_button('cancel','Cancel'));
		$GLOBALS['egw']->template->set_var('lang_debug',lang('Test Import (show importable records <u>only</u> in browser)'));
		$GLOBALS['egw']->template->parse('rows','fheader');

		$cal_names = array(
			'title'		=> 'Title varchar(80)',
			'description' => 'Description text',
			'location'	=> 'Location varchar(255)',
			'start'	=> 'Start Date: Timestamp or eg. YYYY-MM-DD hh:mm',
			'end'	=> 'End Date: Timestamp or eg. YYYY-MM-DD hh:mm',
			'participants' => 'Participants: comma separated user-id\'s or -names',
			'category'	=> 'Categories: id\'s or names, comma separated (new ones got created)',
			'priority'  => 'Priority: 1=Low, 2=Normal, 3=High',
			'public'	=> 'Access: 1=public, 0=private',
			'owner'		=> 'Owner: int(11) user-id/-name',
			'modified'	=> 'Modification date',
			'non_blocking' => '0=Event blocks time, 1=Event creates no conflicts',
			'uid'       => 'Unique Id, allows multiple import to update identical entries',
//			'recur_type'=> 'Type of recuring event',
		);
		$config =& CreateObject('phpgwapi.config','calendar');
		$custom_fields = $config->read_repository();
		unset($config);
		//echo "custom-fields=<pre>".print_r($custom_fields,True)."</pre>";
		foreach ($custom_fields as $name => $data)
		{
			$cal_names['#'.$name] = $data['label'].': Custom field ('.$data['type'].')';
		}

		// the next line is used in the help-text too
		$mktime_lotus = "${PSep}0?([0-9]+)[ .:-]+0?([0-9]*)[ .:-]+0?([0-9]*)[ .:-]+0?([0-9]*)[ .:-]+0?([0-9]*)[ .:-]+0?([0-9]*).*$ASep@mktime(${VPre}4,${VPre}5,${VPre}6,${VPre}2,${VPre}3,${VPre}1)";

		$cal_name_options = "<option value=\"\">none\n";
		foreach($cal_names as $field => $name)
		{
			$cal_name_options .= "<option value=\"$field\">".$GLOBALS['egw']->strip_html($name)."\n";
		}
		$csv_fields = fgetcsv($fp,8000,$_POST['fieldsep']);
		$csv_fields = $GLOBALS['egw']->translation->convert($csv_fields,$_POST['charset']);
		$csv_fields[] = 'no CSV 1';					// eg. for static assignments
		$csv_fields[] = 'no CSV 2';
		$csv_fields[] = 'no CSV 3';
		foreach($csv_fields as $csv_idx => $csv_field)
		{
			$GLOBALS['egw']->template->set_var('csv_field',$csv_field);
			$GLOBALS['egw']->template->set_var('csv_idx',$csv_idx);
			if ($def = $defaults[$csv_field])
			{
				list( $info,$trans ) = explode($PSep,$def,2);
				$GLOBALS['egw']->template->set_var('trans',$trans);
				$GLOBALS['egw']->template->set_var('cal_fields',str_replace('="'.$info.'">','="'.$info.'" selected>',$cal_name_options));
			}
			else
			{
				$GLOBALS['egw']->template->set_var('trans','');
				$GLOBALS['egw']->template->set_var('cal_fields',$cal_name_options);
			}
			$GLOBALS['egw']->template->parse('rows','fields',True);
		}
		$GLOBALS['egw']->template->set_var('lang_start',lang('Startrecord'));
		$GLOBALS['egw']->template->set_var('start',get_var('start',array('POST'),1));
		$msg = ($safe_mode = ini_get('safe_mode') == 'On') ? lang('to many might exceed your execution-time-limit'):
			lang('empty for all');
		$GLOBALS['egw']->template->set_var('lang_max',lang('Number of records to read (%1)',$msg));
		$GLOBALS['egw']->template->set_var('max',get_var('max',array('POST'),$safe_mode ? 200 : ''));
		$GLOBALS['egw']->template->set_var('debug',get_var('debug',array('POST'),True)?' checked':'');
		$GLOBALS['egw']->template->parse('rows','ffooter',True);
		fclose($fp);

		$hiddenvars = html::input_hidden(array(
			'action'  => 'import',
			'fieldsep'=> $_POST['fieldsep'],
			'charset' => $_POST['charset']
		));
		$help_on_trans = "<a name=\"help\"></a><b>How to use Translation's</b><p>".
			"Translations enable you to change / adapt the content of each CSV field for your needs. <br>".
			"General syntax is: <b>pattern1 ${ASep} replacement1 ${PSep} ... ${PSep} patternN ${ASep} replacementN</b><br>".
			"If the pattern-part of a pair is ommited it will match everything ('^.*$'), which is only ".
			"usefull for the last pair, as they are worked from left to right.<p>".
			"First example: <b>1${ASep}private${PSep}public</b><br>".
			"This will translate a '1' in the CVS field to 'privat' and everything else to 'public'.<p>".
			"Patterns as well as the replacement can be regular expressions (the replacement is done via ereg_replace). ".
			"If, after all replacements, the value starts with an '@' AND you have admin rights the whole value is eval()'ed, so you ".
			"may use php, eGroupWare or your own functions. This is quiet powerfull, but <u>circumvents all ACL</u>.<p>".
			"Example using regular expressions and '@'-eval(): <br><b>$mktime_lotus</b><br>".
			"It will read a date of the form '2001-05-20 08:00:00.00000000000000000' (and many more, see the regular expr.). ".
			"The&nbsp;[&nbsp;.:-]-separated fields are read and assigned in different order to @mktime(). Please note to use ".
			"${VPre} insted of a backslash (I couldn't get backslash through all the involved templates and forms.) ".
			"plus the field-number of the pattern.<p>".
			"In addintion to the fields assign by the pattern of the reg.exp. you can use all other CSV-fields, with the ".
			"syntax <b>${CPre}CVS-FIELDNAME$CPos</b>. Here is an example: <br>".
			"<b>.+$ASep${CPre}Company$CPos: ${CPre}NFamily$CPos, ${CPre}NGiven$CPos$PSep${CPre}NFamily$CPos, ${CPre}NGiven$CPos</b><br>".
			"It is used on the CVS-field 'Company' and constructs a something like <i>Company: FamilyName, GivenName</i> or ".
			"<i>FamilyName, GivenName</i> if 'Company' is empty.<p>".
			"You can use the 'No CVS #'-fields to assign cvs-values to more than on field, the following example uses the ".
			"cvs-field 'Note' (which gots already assingned to the description) and construct a short subject: ".
			"<b>@substr(${CPre}Note$CPos,0,60).' ...'</b><p>".
			"Their is two important user-function for the calendar:<br>".
			"<b>@addr_id(${CPre}NFamily$CPos,${CPre}NGiven$CPos,${CPre}Company$CPos)</b> ".
			"searches the addressbook for an address and returns the id if it founds an exact match of at least ".
			"<i>NFamily</i> AND (<i>NGiven</i> OR <i>Company</i>). This is necessary to link your imported calendar-entrys ".
			"with the addressbook.<br>".
			"<b>@cat_id(Cat1,...,CatN)</b> returns a (','-separated) list with the cat_id's. If a category isn't found, it ".
			"will be automaticaly added. This function is automaticaly called if the category is not numerical!<p>".
			"I hope that helped to understand the features, if not <a href='mailto:egroupware-users@lists.sf.net'>ask</a>.";

		$GLOBALS['egw']->template->set_var('help_on_trans',lang($help_on_trans));	// I don't think anyone will translate this
		break;

	case 'next':
		$_POST['cal_fields'] = unserialize(stripslashes($_POST['cal_fields']));
		$_POST['trans']       = unserialize(stripslashes($_POST['trans']));
		// fall-through
	case 'import':
		$hiddenvars = html::input_hidden(array(
			'action'  => 'continue',
			'fieldsep'=> $_POST['fieldsep'],
			'charset' => $_POST['charset'],
			'start'   => $_POST['start']+(!$_POST['debug'] ? $_POST['max'] : 0),
			'max'     => $_POST['max'],
			'debug'   => $_POST['debug'],
			'cal_fields' => $_POST['cal_fields'],
			'trans'   => $_POST['trans']
		));
		@set_time_limit(0);
		$fp=fopen($csvfile,'r');
		$csv_fields = fgetcsv($fp,8000,$_POST['fieldsep']);
		$csv_fields = $GLOBALS['egw']->translation->convert($csv_fields,$_POST['charset']);
		$csv_fields[] = 'no CSV 1';						// eg. for static assignments
		$csv_fields[] = 'no CSV 2';
		$csv_fields[] = 'no CSV 3';

		$cal_fields = array_diff($_POST['cal_fields'],array( '' ));	// throw away empty / not assigned entrys

		$defaults = array();
		foreach($cal_fields as $csv_idx => $info)
		{	// convert $trans[$csv_idx] into array of pattern => value
			$defaults[$csv_fields[$csv_idx]] = $info;
			if ($_POST['trans'][$csv_idx])
			{
				$defaults[$csv_fields[$csv_idx]] .= $PSep.addslashes($_POST['trans'][$csv_idx]);
			}
		}

		$GLOBALS['egw']->preferences->read_repository();
		$GLOBALS['egw']->preferences->add('calendar','cvs_import',$defaults);
		$GLOBALS['egw']->preferences->save_repository(True);

		$log = '<table border="1" style="border: 1px dotted black; border-collapse: collapse;">'."\n\t<tr><td>#</td>\n";

		foreach($cal_fields as $csv_idx => $info)
		{	// convert $trans[$csv_idx] into array of pattern => value
			// if (!$debug) echo "<p>$csv_idx: ".$csv_fields[$csv_idx].": $info".($trans[$csv_idx] ? ': '.$trans[$csv_idx] : '')."</p>";
			$pat_reps = explode($PSep,stripslashes($_POST['trans'][$csv_idx]));
			$replaces = ''; $values = '';
			if ($pat_reps[0] != '')
			{
				foreach($pat_reps as $k => $pat_rep)
				{
					list($pattern,$replace) = explode($ASep,$pat_rep,2);
					if ($replace == '')
					{
						$replace = $pattern; $pattern = '^.*$';
					}
					$values[$pattern] = $replace;	// replace two with only one, added by the form
					$replaces .= ($replaces != '' ? $PSep : '') . $pattern . $ASep . $replace;
				}
				$trans[$csv_idx] = $values;
			} /*else
				unset( $trans[$csv_idx] );*/

			$log .= "\t\t<td><b>$info</b></td>\n";
		}
		if (!in_array('public',$cal_fields))	// autocreate public access if not set by user
		{
			$log .= "\t\t<td><b>isPublic</b></td>\n";
		}
/*		if (!in_array('recur_type',$cal_fields))	// autocreate single event if not set by user
		{
			$log .= "\t\t<td><b>recureing</b></td>\n";
		}*/
		$log .= "\t\t<td><b>Imported</b></td>\n\t</tr>\n";

		$start = $_POST['start'] < 1 ? 1 : $_POST['start'];

		// ignore empty lines, is_null($fields[0]) is returned on empty lines !!!
		for($i = 1; $i < $start; ++$i)	// overread lines before our start-record
		{
			while(($fields = fgetcsv($fp,8000,$_POST['fieldsep'])) && is_null($fields[0])) ;
		}
		for($anz = 0; !$_POST['max'] || $anz < $_POST['max']; ++$anz)
		{
			while(($fields = fgetcsv($fp,8000,$_POST['fieldsep'])) && is_null($fields[0])) ;
			if (!$fields)
			{
				break;	// EOF
			}
			$fields = $GLOBALS['egw']->translation->convert($fields,$_POST['charset']);

			$log .= "\t<tr>\n\t\t<td>".($start+$anz)."</td>\n";

			$values = array();
			foreach($cal_fields as $csv_idx => $info)
			{
				//echo "<p>$csv: $info".($trans[$csv] ? ': '.$trans[$csv] : '')."</p>";
				$val = $fields[$csv_idx];
				if (isset($trans[$csv_idx]) && is_array($trans[$csv_idx]))
				{
					foreach($trans[$csv_idx] as $pattern => $replace)
					{
						if (ereg((string) $pattern,$val))
						{
							//echo "<p>csv_idx='$csv_idx',info='$info',trans_csv=".print_r($trans_csv).",ereg_replace('$pattern','$replace','$val') = ";
							$val = ereg_replace((string) $pattern,str_replace($VPre,'\\',$replace),(string) $val);
							//echo "'$val'";

							$reg = $CPreReg.'([a-zA-Z_0-9 ]+)'.$CPosReg;
							while (ereg($reg,$val,$vars))
							{	// expand all CSV fields
								$val = str_replace($CPre.$vars[1].$CPos,$val[0] == '@' ? "'".addslashes($fields[array_search($vars[1],$csv_fields)])."'" : $fields[array_search($vars[1],$csv_fields)],$val);
							}
							//echo "='$val'</p>";
							if ($val[0] == '@' && is_admin)
							{
								// removing the $ to close security hole of showing vars, which contain eg. passwords
								$val = 'return '.substr(str_replace('$','',$val),1).';';
								// echo "<p>eval('$val')=";
								$val = eval($val);
								// echo "'$val'</p>";
							}
							if ($pattern[0] != '@' || $val)
								break;
						}
					}
				}
				$values[$info] = $val;

				$log .= "\t\t<td>$val</td>\n";
			}
			if (!in_array('public',$cal_fields))
			{
				$values['public'] = 1;	// public access if not set by user
				$log .= "\t\t<td>".$values['public']."</td>\n";
			}
			if (!in_array('recur_type',$cal_fields))
			{
				$values['recur_type'] = MCAL_RECUR_NONE;	// single event if not set by user
//				$log .= "\t\t<td>".$values['recure_type']."</td>\n";
			}

			if(!$_POST['debug'] && count($values))	// dont import empty contacts
			{
				//echo "values=<pre>".print_r($values,True)."</pre>\n";
				if (!is_numeric($values['owner']))
				{
					$values['owner'] = $GLOBALS['egw']->accounts->name2id($values['owner']);
				}
				if (!$values['owner'] || !$GLOBALS['egw']->accounts->exists($values['owner']))
				{
					$values['owner'] = $GLOBALS['egw_info']['user']['account_id'];
				}
				if ($values['priority'] < 1 || $values['priority'] > 3)
				{
					$values['priority'] = 2;
				}
				// convert the category name to an id
				if ($values['category'] && !is_numeric($values['category']))
				{
					$values['category'] = cat_id($values['category']);
				}
				if (empty($values['title']))
				{
					$values['title'] = '('.lang('none').')';
				}

				// convert dates to timestamps
				foreach(array('start','end','modified') as $date)
				{
					if (isset($values[$date]) && !is_numeric($date))
					{
						// convert german DD.MM.YYYY format into ISO YYYY-MM-DD format
						$values[$date] = ereg_replace('([0-9]{1,2}).([0-9]{1,2}).([0-9]{4})','\3-\2-\1',$values[$date]);
						// remove fractures of seconds if present at the end of the string
						if (ereg('(.*)\.[0-9]+',$values[$date],$parts)) $values[$date] = $parts[1];
						$values[$date] = strtotime($values[$date]);
					}
				}
				// convert participants-names to user-id's
				$parts = $values['participants'] ? split('[,;]',$values['participants']) : array();
				$values['participants'] = array();
				foreach($parts as $part_status)
				{
					list($part,$status) = explode('=',$part_status);
					$valid_status = array('U'=>'U','u'=>'U','A'=>'A','a'=>'A','R'=>'R','r'=>'R','T'=>'T','t'=>'T');
					$status = isset($valid_status[$status]) ? $valid_status[$status] : 'U';
					if ($GLOBALS['egw']->accounts->exists($part))
					{
						$part = $GLOBALS['egw']->accounts->name2id($part);
					}
					if ($part && is_numeric($part))
					{
						$values['participants'][$part] = $status;
					}
				}
				if (!count($values['participants']))		// no valid participants so far --> add the importing user/owner
				{
					$values['participants'][$values['owner']] = 'A';
				}
				if ($values['uid'])
				{
					if (is_numeric($values['uid']))		// to not conflict with our own id's
					{
						$values['uid'] = 'cal-csv-import-'.$values['uid'].'-'.$GLOBALS['egw_info']['server']['install_id'];
					}
					if (($event = $cal->bo->read($values['uid'],null,$is_admin)))	// no ACL check for admins
					{
						//echo "updating existing event"; _debug_array($event);
						$values['id'] = $event['id'];
					}
				}
				$action = $values['id'] ? 'updating' : 'adding';
				//echo $action.'<pre>'.print_r($values,True)."</pre>\n";
				$cal_id = $cal->bo->update($values,true,!$values['modified'],$is_admin);	// ignoring conflicts and ACL (for admins) on import
				
				$log .= "\t\t".'<td align="center">'.($cal_id ? $action." cal_id=$cal_id" : 'Error '.$action)."</td>\n\t</tr>\n";
			}
			else
			{
				$log .= "\t\t".'<td align="center">only test</td>'."\n\t</tr>\n";
			}
		}
		$log .= "</table>\n";

		$GLOBALS['egw']->template->set_var('anz_imported',($_POST['debug'] ?
			lang('%1 records read (not yet imported, you may go back and uncheck Test Import)',
			$anz,'','') :
			lang('%1 records imported',$anz)). '&nbsp;'.
			(!$_POST['debug'] && $fields ? html::submit_button('next','Import next set') . '&nbsp;':'').
			html::submit_button('continue','Back') . '&nbsp;'.
			html::submit_button('cancel','Cancel'));
		$GLOBALS['egw']->template->set_var('log',$log);
		$GLOBALS['egw']->template->parse('rows','imported');
		break;
	}
	$GLOBALS['egw']->template->set_var('hiddenvars',str_replace('{','&#x7B;',$hiddenvars));
	$GLOBALS['egw']->template->pfp('phpgw_body','import');
	$GLOBALS['egw']->common->egw_footer();