cache.php

<?php
    /*
	 *	Copyright 2009 Bion Oren
	 *
	 *	Licensed under the Apache License, Version 2.0 (the "License");
	 *	you may not use this file except in compliance with the License.
	 *	You may obtain a copy of the License at
	 *		http://www.apache.org/licenses/LICENSE-2.0
	 *	Unless required by applicable law or agreed to in writing, software
	 *	distributed under the License is distributed on an "AS IS" BASIS,
	 *	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	 *	See the License for the specific language governing permissions and
	 *	limitations under the License.
	 */

    error_reporting(E_ALL | E_STRICT);
	date_default_timezone_set("America/Chicago");

	$path = "./";
    require_once($path."functions.php");
    require_once($path."Course.php");
	require_once("UnitTests.php");

    /**
     * Writes cash data for all courses in the given semester and year using data from the
     * provided root file path.
     *
     * @param STRING $file Root path to the xml class information.
     * @param INTEGER $year The year to cash.
     * @param STRING $semester One of ('SP', 'SU', 'FA') for Spring, Summer, and Fall semesters.
     * @param STRING $prefix Optional prefix ('non' for non-traditional classes).
     */
	function writeClassData($file, $year, $semester, $prefix="") {
		//get the current class schedule from LeTourneau
		$file .= $year."/".$semester;
		$xml = simplexml_load_file($file);
		if(count($xml->children()) == 0 || $xml === false) {
            //there's no data here, or there was an error
            return false;
        }

        $classes = array();
		$campusMask = array();
		$i = 1;
        foreach($xml as $class) {
			$obj = new Course($class, empty($prefix));
			foreach($class->{"meeting"} as $meet) {
				$campus = (string)$meet->{"meetingcampus"};
				if($meet->{"meetingtypecode"} == "IE") {
					$campus = "INTL";
				} elseif($meet->{"meetingtypecode"} == "OL") {
					$campus = "XOL";
				}
				if(empty($campus)) {
					$campus = "N/A";
				}
				if(!isset($campusMask[$campus])) {
					$campusMask[$campus] = $i;
					$i <<= 1;
				}
				$obj->addMeeting($meet, $campus, $campusMask[$campus]);
			}
			$classes[] = $obj;
        }
		$classes[] = $campusMask;

		$filename = "cache/".$prefix.$year.$semester;
		file_put_contents($filename.".tmp", serialize($classes));
        //seamlessly transition the new data
        rename($filename.".tmp", $filename.".txt");
	}

	//run unit test on getFileArray
	testGetFileArray();

    $files = getFileArray(false);
    $trad = "http://gimme.letu.edu/courseschedule/trad/full/";
    $nontrad = "http://gimme.letu.edu/courseschedule/sgps/full/";
    foreach($files as $file) {
        $year = substr($file, 0, 4);
        $sem = substr($file, -2);
        writeClassData($trad, $year, $sem);
        writeClassData($nontrad, $year, $sem, "Non");
    }
?>