From d895b852a6e160496ffc760d46d3719a3d62ff86 Mon Sep 17 00:00:00 2001
From: Nathan Kinkade <nath@nkinka.de>
Date: Sun, 3 Feb 2008 23:23:24 +0000
Subject: Initial checkin of nutridb.org and basic subversion directory
 structure

---
 lib/standard.lib.php | 112 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 lib/standard.lib.php

(limited to 'lib/standard.lib.php')
diff --git a/lib/standard.lib.php b/lib/standard.lib.php
new file mode 100644
index 0000000..503052e
--- /dev/null
+++ b/lib/standard.lib.php
@@ -0,0 +1,112 @@
+<?php
+
+# this function will simply initialize a variable to
+# an empty string unless it already has a value, in
+# which case it will simply return the existing value
+function initVar($var) {
+	
+	$var = empty($var) ? "" : $var;
+	return $var;
+
+}
+
+# this function will initialize a variable to an empty
+# string unless it already has a value, in which case
+# it will simply return the existing value ... the only
+# diff. between this function and initVar() is that this
+# fuction encodes HTML special characters and then echos
+# the variable ... useful for initializing and printing
+# a variable all in one step
+function printVar($var) {
+	
+	$var = empty($var) ? "" : htmlspecialchars($var,ENT_QUOTES);
+	echo $var;
+	return true;
+
+}
+
+# create pagination, including a page navigation bar.  the
+# output should be fairly generic, enclosed in a div with 
+# a css class of 'paginationNav', and more or less suitable
+# to be dropped into just about any page.
+function getPagination($page = 1, $pageOffset, $uri , $paginationSql) {
+
+	global $config, $db;
+
+	# start with a blank page navigation menu
+	$pageNav = "";
+
+	# change special chars, particularly the & to the HTML entity
+	# so that browsers don't confuse it with an HTML entity.
+	$uri = htmlspecialchars($uri);
+
+	# determine total number of records and pages
+	$db->SelectOne($paginationSql);
+	$totalRecords = $db->_row['rowCount'];
+	$totalPages = ceil($totalRecords / $config->_recordsPerPage);
+
+	# if the total records are less than what we show per page, then
+	# just skip everything else below
+	if ( $totalRecords <= $config->_recordsPerPage ) {
+		$fromRecord = ($pageOffset + 1);
+		$pageNav .= <<<HTML
+	<br />
+	<span style='font-size: xx-small;'>Displaying: $fromRecord to $totalRecords of $totalRecords results.</span>
+HTML;
+
+		return $pageNav;
+	}
+
+	# either append the proper page with & or ? depending
+	# on whether the submitted URI already has a query
+	# string or not
+	if ( preg_match("/\?.+/", $uri) ) {
+		$uri = "$uri&amp;";
+	} else {
+		$uri = "$uri?";
+	}
+
+	# create the navigation menu
+	if ( $page > 1 ) { 
+		$pagePrev = ($page - 1);
+		# if the previous page isn't also the first page, show a link for first page.
+		if ( $pagePrev != 1 ) {
+			$pageNav .= "	<a href='{$uri}page=1' title='First Page'>[First] </a>\n";
+		}
+		$pageNav .= "	<a href='{$uri}page=$pagePrev' title='Page $pagePrev'>Prev</a>\n";
+	}
+
+	for ( $idx = 1; $idx <= $totalPages; $idx++ ) {
+		if ( $idx == $page ) {
+			$pageNav .= "	<strong>$idx</strong> \n";
+		} else {
+			$pageNav .= "	<a href='{$uri}page=$idx' title='Page $idx'>$idx</a> \n"; 
+		}
+	}
+
+	if ( ($totalRecords - ($config->_recordsPerPage * $page)) > 0 ) {
+		$pageNext = ($page + 1);
+		$pageNav .= "	<a href='{$uri}page=$pageNext' title='Page $pageNext'>Next</a>\n";
+		# if the previous page isn't also the first page, show a link for first page.
+		if ( $pageNext != $totalPages ) {
+			$pageNav .= "<a href='{$uri}page=$totalPages' title='Last page'> [Last]</a> \n";  
+		}
+	}
+
+	$fromRecord = ($pageOffset + 1);
+	if ( $page == $totalPages ) {
+		$toRecord = $totalRecords;
+	} else {
+		$toRecord = ($pageOffset + $config->_recordsPerPage);
+	}
+
+	$pageNav .= <<<HTML
+	<br />
+	<span style='font-size: xx-small;'>Displaying: $fromRecord to $toRecord of $totalRecords results.</span>
+HTML;
+
+	return $pageNav;
+
+}
+
+?>
-- 
cgit v1.2.3

