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- <?php // $Id: text.lib.php 14637 2008-03-17 22:44:52Z juliomontoya $
- /*
- ==============================================================================
- Dokeos - elearning and course management software
- Copyright (c) 2004-2008 Dokeos S.A.
- Copyright (c) 2003 Ghent University (UGent)
- Copyright (c) 2001 Universite catholique de Louvain (UCL)
- Copyright (c) various contributors
- For a full list of contributors, see "credits.txt".
- The full license can be read in "license.txt".
- 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.
- See the GNU General Public License for more details.
- Contact: Dokeos, 181 rue Royale, B-1000 Brussels, Belgium, info@dokeos.com
- ==============================================================================
- */
- /**
- ==============================================================================
- * This is the text library for Dokeos.
- * Include/require it in your code to use its functionality.
- *
- * @package dokeos.library
- ==============================================================================
- */
- /*
- ==============================================================================
- FUNCTIONS
- ==============================================================================
- */
- /**
- * function make_clickable($string)
- *
- * @desc completes url contained in the text with "<a href ...".
- * However the function simply returns the submitted text without any
- * transformation if it already contains some "<a href:" or "<img src=".
- * @param string $text text to be converted
- * @return text after conversion
- * @author Rewritten by Nathan Codding - Feb 6, 2001.
- * completed by Hugues Peeters - July 22, 2002
- *
- * Actually this function is taken from the PHP BB 1.4 script
- * - Goes through the given string, and replaces xxxx://yyyy with an HTML <a> tag linking
- * to that URL
- * - Goes through the given string, and replaces www.xxxx.yyyy[zzzz] with an HTML <a> tag linking
- * to http://www.xxxx.yyyy[/zzzz]
- * - Goes through the given string, and replaces xxxx@yyyy with an HTML mailto: tag linking
- * to that email address
- * - Only matches these 2 patterns either after a space, or at the beginning of a line
- *
- * Notes: the email one might get annoying - it's easy to make it more restrictive, though.. maybe
- * have it require something like xxxx@yyyy.zzzz or such. We'll see.
- */
- function make_clickable($string)
- {
- if(!stristr($string,' src=') && !stristr($string,' href='))
- {
- $string=eregi_replace("(https?|ftp)://([a-z0-9#?/&=._+:~%-]+)","<a href=\"\\1://\\2\" target=\"_blank\">\\1://\\2</a>",$string);
- $string=eregi_replace("([a-z0-9_.-]+@[a-z0-9.-]+)","<a href=\"mailto:\\1\">\\1</a>",$string);
- }
- return $string;
- }
- /**
- * formats the date according to the locale settings
- *
- * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
- * @author Christophe Gesch� <gesche@ipm.ucl.ac.be>
- * originally inspired from from PhpMyAdmin
- * @param string $formatOfDate date pattern
- * @param integer $timestamp, default is NOW.
- * @return the formatted date
- */
- function format_locale_date( $dateFormat, $timeStamp = -1)
- {
- // Defining the shorts for the days
- $DaysShort = array (get_lang("SundayShort"), get_lang("MondayShort"), get_lang("TuesdayShort"), get_lang("WednesdayShort"), get_lang("ThursdayShort"), get_lang("FridayShort"), get_lang("SaturdayShort"));
- // Defining the days of the week to allow translation of the days
- $DaysLong = array (get_lang("SundayLong"), get_lang("MondayLong"), get_lang("TuesdayLong"), get_lang("WednesdayLong"), get_lang("ThursdayLong"), get_lang("FridayLong"), get_lang("SaturdayLong"));
- // Defining the shorts for the months
- $MonthsShort = array (get_lang("JanuaryShort"), get_lang("FebruaryShort"), get_lang("MarchShort"), get_lang("AprilShort"), get_lang("MayShort"), get_lang("JuneShort"), get_lang("JulyShort"), get_lang("AugustShort"), get_lang("SeptemberShort"), get_lang("OctoberShort"), get_lang("NovemberShort"), get_lang("DecemberShort"));
- // Defining the months of the year to allow translation of the months
- $MonthsLong = array (get_lang("JanuaryLong"), get_lang("FebruaryLong"), get_lang("MarchLong"), get_lang("AprilLong"), get_lang("MayLong"), get_lang("JuneLong"), get_lang("JulyLong"), get_lang("AugustLong"), get_lang("SeptemberLong"), get_lang("OctoberLong"), get_lang("NovemberLong"), get_lang("DecemberLong"));
- if ($timeStamp == -1) $timeStamp = time();
- // with the ereg we replace %aAbB of date format
- //(they can be done by the system when locale date aren't aivailable
- $date = ereg_replace('%[A]', $DaysLong[(int)strftime('%w', $timeStamp)], $dateFormat);
- $date = ereg_replace('%[a]', $DaysShort[(int)strftime('%w', $timeStamp)], $date);
- $date = ereg_replace('%[B]', $MonthsLong[(int)strftime('%m', $timeStamp)-1], $date);
- $date = ereg_replace('%[b]', $MonthsShort[(int)strftime('%m', $timeStamp)-1], $date);
- return strftime($date, $timeStamp);
- } // end function format_locale_date
- /**
- * @desc this function does some parsing on the text that gets inputted. This parsing can be of any kind
- * LaTeX notation, Word Censoring, Glossary Terminology (extension will available soon), Musical Notations, ...
- * The inspiration for this filter function came from Moodle an phpBB who both use a similar approach
- * @param $input string. some text
- * @return $output string. some text that contains the parsed elements.
- * @example [tex]\sqrt(2)[/tex]
- * @author Patrick Cool <patrick.cool@UGent.be>
- * @version March 2OO6
- */
- function text_filter($input, $filter=true)
- {
- //$input=stripslashes($input);
-
- if ($filter==true)
- {
- // *** parse [tex]...[/tex] tags *** //
- // which will return techexplorer or image html depending on the capabilities of the
- // browser of the user (using some javascript that checks if the browser has the TechExplorer plugin installed or not)
- $input=_text_parse_tex($input);
-
-
- // *** parse [teximage]...[/teximage] tags *** //
- // these force the gif rendering of LaTeX using the mimetex gif renderer
- //$input=_text_parse_tex_image($input);
-
-
- // *** parse [texexplorer]...[/texexplorer] tags *** //
- // these force the texeplorer LaTeX notation
- $input=_text_parse_texexplorer($input);
-
- // *** Censor Words *** //
- // censor words. This function removes certain words by [censored]
- // this can be usefull when the campus is open to the world.
- // $input=text_censor_words($input);
-
- // *** parse [?]...[/?] tags *** //
- // for the glossary tool (see http://www.dokeos.com/extensions)
- $input=_text_parse_glossary($input);
-
- // parse [wiki]...[/wiki] tags
- // this is for the coolwiki plugin.
- // $input=text_parse_wiki($input);
-
- // parse [tool]...[/tool] tags
- // this parse function adds a link to a certain tool
- // $input=text_parse_tool($input);
-
- // parse [user]...[/user] tags
-
- // parse [email]...[/email] tags
-
- // parse [code]...[/code] tags
- }
-
- return $input;
- }
- /**
- * Apply parsing to content to parse tex commandos that are seperated by [tex]
- * [/tex] to make it readable for techexplorer plugin.
- * This function should not be accessed directly but should be accesse through the text_filter function
- * @param string $text The text to parse
- * @return string The text after parsing.
- * @author Patrick Cool <patrick.cool@UGent.be>
- * @version June 2004
- */
- function _text_parse_tex($textext)
- {
- //$textext = str_replace(array ("[tex]", "[/tex]"), array ('[*****]', '[/*****]'), $textext);
- //$textext=stripslashes($texttext);
-
- $input_array=preg_split("/(\[tex]|\[\/tex])/",$textext,-1, PREG_SPLIT_DELIM_CAPTURE);
-
-
- foreach ($input_array as $key=>$value)
- {
- if ($input_array[$key-1]=='[tex]' AND $input_array[$key+1]=='[/tex]')
- {
- $input_array[$key]=latex_gif_renderer($value);
- unset($input_array[$key-1]);
- unset($input_array[$key+1]);
- //echo 'LaTeX: <embed type="application/x-techexplorer" texdata="'.stripslashes($value).'" autosize="true" pluginspage="http://www.integretechpub.com/techexplorer/"><br />';
- }
- }
-
- $output=implode('',$input_array);
- return $output;
- }
- /**
- * Apply parsing to content to parse tex commandos that are seperated by [tex]
- * [/tex] to make it readable for techexplorer plugin.
- * This function should not be accessed directly but should be accesse through the text_filter function
- * @param string $text The text to parse
- * @return string The text after parsing.
- * @author Patrick Cool <patrick.cool@UGent.be>
- * @version June 2004
- */
- function _text_parse_texexplorer($textext)
- {
- if (strstr($_SERVER['HTTP_USER_AGENT'], 'MSIE'))
- {
- $textext = str_replace(array ("[texexplorer]", "[/texexplorer]"), array ("<object classid=\"clsid:5AFAB315-AD87-11D3-98BB-002035EFB1A4\"><param name=\"autosize\" value=\"true\" /><param name=\"DataType\" value=\"0\" /><param name=\"Data\" value=\"", "\" /></object>"), $textext);
- }
- else
- {
- $textext = str_replace(array ("[texexplorer]", "[/texexplorer]"), array ("<embed type=\"application/x-techexplorer\" texdata=\"", "\" autosize=\"true\" pluginspage=\"http://www.integretechpub.com/techexplorer/\">"), $textext);
- }
- return $textext;
- }
- /**
- * This function should not be accessed directly but should be accesse through the text_filter function
- * @author Patrick Cool <patrick.cool@UGent.be>
- */
- function _text_parse_glossary($input)
- {
- return $input;
- }
- /**
- * @desc this function makes a valid link to a different tool
- * This function should not be accessed directly but should be accesse through the text_filter function
- * @author Patrick Cool <patrick.cool@UGent.be>
- */
- function _text_parse_tool($input)
- {
- // an array with all the valid tools
- $tools[]=array(TOOL_ANNOUNCEMENT, 'announcements/announcements.php');
- $tools[]=array(TOOL_CALENDAR_EVENT, 'calendar/agenda.php');
-
- // check if the name between the [tool] [/tool] tags is a valid one
- }
- /**
- * render LaTeX code into a gif or retrieve a cached version of the gif
- * @author Patrick Cool <patrick.cool@UGent.be> Ghent University
- */
- function latex_gif_renderer($latex_code)
- {
- global $_course;
-
- // setting the paths and filenames
- $mimetex_path=api_get_path(LIBRARY_PATH).'mimetex/';
- $temp_path=api_get_path(SYS_COURSE_PATH).$_course['path'].'/temp/';
- $latex_filename=md5($latex_code).'.gif';
-
- if(!file_exists($temp_path.$latex_filename) OR isset($_GET['render']))
- {
- if ((PHP_OS == "WINNT") || (PHP_OS == "WIN32") || (PHP_OS == "Windows"))
- {
- $mimetex_command=$mimetex_path.'mimetex.exe -e "'.$temp_path.md5($latex_code).'.gif" '.escapeshellarg($latex_code).'';
- }
- else
- {
- $mimetex_command=$mimetex_path.'mimetex.linux -e "'.$temp_path.md5($latex_code).'.gif" '.escapeshellarg($latex_code);
- }
- exec($mimetex_command);
- //echo 'volgende shell commando werd uitgevoerd:<br /><pre>'.$mimetex_command.'</pre><hr>';
- }
-
- $return = "<a href=\"\" onclick=\"newWindow=window.open('".api_get_path(WEB_CODE_PATH)."inc/latex.php?code=".urlencode($latex_code)."&filename=$latex_filename','latexCode','toolbar=no,location=no,scrollbars=yes,resizable=yes,status=yes,width=375,height=250,left=200,top=100');\">";
- $return .= '<img src="'.api_get_path(WEB_COURSE_PATH).$_course['path'].'/temp/'.$latex_filename.'" alt="'.$latex_code.'" border="0" /></a>';
- return $return;
- }
- /**
- * This function returns the difference between the current date (date(now)) with the parameter $date in a string format like "2 days, 1 hour"
- * Example: $date="2008-03-07 15:44:08";
- * date_to_str($date) it will return 3 days, 20 hours
- *
- * @param string This string has to be the result of a date function in this format -> date("Y-m-d H:i:s",time());
- * @return string The difference between the current date and the parameter in a literal way "3 days, 2 hour" *
- * @author Julio Montoya
- */
- function date_to_str_ago($date)
- {
- $dst_date=strtotime($date);
- //for not call date several times
- $date_array=date("s/i/G/j/n/Y",$dst_date);
- $date_split=explode("/",$date_array);
-
- $dst_s=$date_split[0];
- $dst_m=$date_split[1];
- $dst_h=$date_split[2];
- $dst_day=$date_split[3];
- $dst_mth=$date_split[4];
- $dst_yr=$date_split[5];
-
- $dst_date = mktime($dst_h,$dst_m,$dst_s,$dst_mth,$dst_day,$dst_yr);
- $time=$offset = time()-$dst_date; //seconds between current days and today
-
- //------------ Here start the functions sec_to_str
- $act_day=date('d');
- $act_mth=date('n');
- $act_yr = date('Y');
-
- if ($dst_day==$act_day && $dst_mth==$act_mth && $dst_yr == $act_yr )
- {
- return ucfirst(get_lang('Today'));
- }
-
- if ($dst_day==$act_day-1 && $dst_mth==$act_mth && $dst_yr == $act_yr )
- {
- return ucfirst(get_lang('Yesterday'));
- }
-
- // original 1
- //$sec_time=array("century"=>3.1556926*pow(10,9),"decade"=>315569260,"year"=>31556926,"month"=>2629743.83,"week"=>604800,"day"=>86400,"hour"=>3600,"minute"=>60,"second"=>1);
- //$sec_time=array(get_lang('MinDecade')=>315569260,get_lang('MinYear')=>31556926,get_lang('MinMonth')=>2629743.83,get_lang('MinWeek')=>604800,get_lang('MinDay')=>86400,get_lang('MinHour')=>3600,get_lang('MinMinute')=>60);
- $MinDecade=get_lang('MinDecade');
- $MinYear=get_lang('MinYear');
- $MinMonth=get_lang('MinMonth');
- $MinWeek=get_lang('MinWeek');
- $MinDay=get_lang('MinDay');
- $MinHour=get_lang('MinHour');
- $MinMinute=get_lang('MinMinute');
-
- $MinDecades=get_lang('MinDecades');
- $MinYears=get_lang('MinYears');
- $MinMonths=get_lang('MinMonths');
- $MinWeeks=get_lang('MinWeeks');
- $MinDays=get_lang('MinDays');
- $MinHours=get_lang('MinHours');
- $MinMinutes=get_lang('MinMinutes');
-
- $sec_time_time=array(315569260,31556926,2629743.83,604800,86400,3600,60);
- $sec_time_sing=array($MinDecade,$MinYear,$MinMonth,$MinWeek,$MinDay,$MinHour,$MinMinute);
- $sec_time_plu =array($MinDecades,$MinYears,$MinMonths,$MinWeeks,$MinDays,$MinHours,$MinMinutes);
-
-
- $str_result=array();
- $time_result=array();
- $key_result=array();
-
- $str='';
- $i=0;
- for ($i=0;$i<count($sec_time_time);$i++)
- {
- $seconds=$sec_time_time[$i];
-
- if($seconds > $time) {
- continue;
- }
-
- $current_value=intval($time/$seconds);
-
- if ($current_value!='1')
- {
- $date_str= $sec_time_plu[$i];
- }
- else
- {
- $date_str= $sec_time_sing[$i];
-
- }
- $key_result[]=$sec_time_sing[$i];
-
- $str_result[]=$current_value.' '.$date_str;
- $time_result[]= $current_value;
- $str.=$current_value.$date_str;
- $time%=$seconds;
- }
-
- if ($key_result[0]== $MinDay && $key_result[1]== $MinMinute)
- {
- $key_result[1]=' 0 '.$MinHours;
- $str_result[0]=$time_result[0].' '.$key_result[0];
- $str_result[1]=$key_result[1];
- }
-
- if ($key_result[0]== $MinYear && ($key_result[1]== $MinDay || $key_result[1]== $MinWeek))
- {
- $key_result[1]=' 0 '.$MinMonths;
- $str_result[0]=$time_result[0].' '.$key_result[0];
- $str_result[1]=$key_result[1];
- }
-
- if (!empty($str_result[1]))
- {
- $str=$str_result[0].', '.$str_result[1];
- }
- else
- {
- $str=$str_result[0];
- }
-
- return $str;
- }
- ?>
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