science-ation/config_editor.inc.php

<?
/* 
   This file is part of the 'Science Fair In A Box' project
   SFIAB Website: http://www.sfiab.ca

   Copyright (C) 2005 Sci-Tech Ontario Inc <info@scitechontario.org>
   Copyright (C) 2005 James Grant <james@lightbox.org>

   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 2.

   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; see the file COPYING.  If not, write to
   the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.
*/
?>
<?

function config_editor_load($category, $year)
{
	$query = "SELECT * FROM config WHERE year='$year' AND category='$category' ORDER BY ord";
	$q = mysql_query($query);
	print(mysql_error());

	$var = array();
	while($r=mysql_fetch_object($q)) {
		$var[$r->var]['val'] = $r->val;
		$var[$r->var]['desc'] = $r->description;
		$var[$r->var]['category'] = $r->category;
		$var[$r->var]['ord'] = $r->ord;
		$var[$r->var]['type'] = $r->type;
		$var[$r->var]['type_values'] = $r->type_values;
	}
	return $var;
}

function config_editor_parse_from_http_headers($array_name)
{
	$ans = array();
	if(!is_array($_POST[$array_name])) return $ans;

	$keys = array_keys($_POST[$array_name]);
	foreach($keys as $id) {
		$ans[$id] = stripslashes($_POST[$array_name][$id]);
	}	
	return $ans;
}

function config_editor_require_vars($category, $year, $varlist)
{
	global $config;
	foreach($varlist as $v) {
		if(isset($config[$v])) continue;

		/* FInd var with year = -1 */
		$q = mysql_query("SELECT * FROM config WHERE ".
					"var='$v' AND year='-1'");
		if(mysql_num_rows($q) != 1) {
			/* Insert a dummy */
			mysql_query("INSERT INTO `config` (`var`, `val`, 
				`description`, `category`, `type`, `type_values`,
				`year`, `ord`) VALUES ('$v', '', '', 
				'$category', 'text', '', $year, 99999)");
		} else {
			$r = mysql_fetch_object($q);
			mysql_query("INSERT INTO `config` (`var`, `val`, 
				`description`, `category`, `type`, `type_values`,
				`year`, `ord`) VALUES ('$v', '{$r->val}', 
				'{$r->description}', '{$r->category}', '{$r->type}',
				'{$r->type_values}', '$year', {$r->ord})");
		}
	}
}
/* A complete question editor.  Just call it with the
 * section you want to edit, a year, the array_name to use for
 * POSTing and GETting the questions (so you can put more than one
 * edtior on a single page), and give it $_SERVER['PHP_SELF'], because
 * php_self inside this function is this file.
 * FUTURE WORK: it would be nice to hide the order, and just implement
 *  a bunch of up/down arrows, and dynamically compute the order for
 *  all elements */
function config_editor($category, $year, $array_name, $self) 
{
	global $config;

	if($_POST['action']=="update") {

		$var = config_editor_parse_from_http_headers($array_name);
		$varkeys = array_keys($var);
		foreach($varkeys as $k) {
			$val = mysql_escape_string(stripslashes($var[$k]));
			$v = mysql_escape_string(stripslashes($k));
			mysql_query("UPDATE config SET val=\"$val\" WHERE var=\"$v\" AND `year`='$year'");
			print mysql_error();
//			echo "Saving {$v} = $val<br>";
		}
		echo happy(i18n("Configuration Updated"));
	}

	/* Load questions, then handle up and down, because with up and down we
	 * have to modify 2 questions to maintain the order */
	$var = config_editor_load($category, $year);

	echo "<form method=\"post\" action=\"$self\">";

	echo "<table cellpadding=\"3\">";

	$varkeys = array_keys($var);
	//compute the optimal input size to use
	$biggest=0;
	foreach($varkeys as $k) {
		if(strlen($var[$k]['val'])>$biggest)
			$biggest=strlen($var[$k]['val']);
	}
	if($biggest>30) $size=30;
	else $size=$biggest+1;


	$line = 1;
	foreach($varkeys as $k) {
		$trclass = ($line % 2 == 0) ? "even" : "odd";
		$line++;

		print("<tr class=\"$trclass\">");
		print("<td>{$var[$k]['desc']}</td>");
		print("<td>");

		$val = htmlspecialchars($var[$k]['val']);
		$name = "${array_name}[$k]";

		switch($var[$k]['type']) {
		case "yesno":
			print("<select name=\"$name\">");
			$sel = ($val == 'yes') ? 'selected=selected' : '';
			print("<option $sel value=\"yes\">Yes</option>");
			$sel = ($val == 'no') ? 'selected=selected' : '';
			print("<option $sel value=\"no\">No</option>");
			print("</select>");
			break;
		case "enum":
			$values = $var[$k]['type_values'];
			/* Split values */
			/* The PERL regex here matches any string of the form
			 * key=val|   , where the = and 'val' and '|' are
			 * optional.  val is allowed to contain spaces. Using
			 * preg_match_all runs this regex multiple times, and
			 * creates arrays for each subpattern that matches.
			 * For example, "aa=Aye|bb=Bee Bee|cc|dd=Dee"
			 * Would construct the following Array of Arrays:
			 * Array ( [0] => Array ( [0] => "aa=Aye|",
			 			  [1] => "bb=Bee Bee|",
						  [2] => "cc|",
						  [3] => "dd=Dee" ),
				   [1] => Array ( [0] => "aa",
			 			  [1] => "bb",
						  [2] => "cc",
						  [3] => "dd" ),
				   [2] => Array ( [0] => "Aye",
			 			  [1] => "Bee Bee",
						  [2] => "",
						  [3] => "Dee" )  )
			* neat eh?  :)  We use [1] and [2] to form the keys and
			* values that we show the user */

			preg_match_all("/([^\|=]+)(?:=([^\|]+))?\|?/", $values, $regs);
//			print_r($regs);
			print("<select name=\"$name\">");
			for($x=0; $x<count($regs[1]); $x++) {
				$e_key = trim($regs[1][$x]);
				$e_val = trim($regs[2][$x]);
				if($e_val == "") $e_val = $e_key;

				$sel = ($val == $e_key) ? 'selected=selected' : '';
				print("<option $sel value=\"$e_key\">$e_val</option>");
			}
			print("</select>");
			break;
		default:
			print("<input size=\"$size\" type=\"text\" name=\"$name\" value=\"$val\">\n");
			break;
		}
		echo "</td></tr>";
	}
	print("</table>");
	print("<input type=\"hidden\" name=\"category\" value=\"$category\" >\n");
	print("<input type=\"hidden\" name=\"action\" value=\"update\" >\n");
	print("<input type=\"submit\" value=\"".i18n("Save Configuration")."\" />\n");

	echo "</form>";
}

?>