/
print.php
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print.php
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<?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.
*/
date_default_timezone_set("America/Chicago");
error_reporting(E_ALL);
$path = "./";
require_once($path."functions.php");
require_once($path."Meeting.php");
/**
* Handles display of a class schedule.
*
* All input should be in the query string. This class expects the following parameters:
* sem=YYYYXX where YYYY is the 4 digit year and XX is a 2 letter semester code (one of SP, SU, or FA).
* classes=LIST where LIST is a ~ seperated list with each element in the following format:
* 1::2::3::4::5 where each number corresponds as follows:
* 1: INTEGER - Bit string of days this class occurs on (see $DAY_NUMBERS below)
* 2: FLOAT - 24 floating point representation of the class' start time (hours + minutes/60)
* 3: FLOAT - class' end time (see formatting notes for 2)
* 4: STRING - location of the class
* 5: STRING - Name of the class
* [trad=[trad/non]] (Default trad)
* [overlayClasses=LIST] where LIST has the same definition as for classes above
* NOTE: It is assumed that the overlay classes will overlap with the times and days of the other classes.
*
* @author Bion Oren
* @version 1.0
*/
class SchedulePrinter {
/** ARRAY bits corresponding to each day of the week. */
public static $DAY_NUMBERS = array(1, 2, 4, 8, 16, 32, 64);
/** ARRAY names for each day of the week. */
public static $DAYS = array("Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday");
//IMAGE RELATED CONSTANTS
/** INTEGER Image width. */
protected static $width = 438;//670;
/** INTEGER Image height. */
protected static $height = 0;
/** INTEGER Default start day (Monday). */
protected static $defaultStartDay = 1;
/** INTEGER Default number of days (5 = Monday-Friday default). */
protected static $defaultNumDays = 5;
/** INTEGER Base font size. */
protected static $fontSize = 8;//13;
//INFORMATION SPECIFIC TO THIS SCHEDULE
/**
* INTEGER The start day for this schedule.
* @see $defaultStartDay
*/
protected $startDay;
/**
* INTEGER The number of days in this schedule.
* @see $defaultNumDays
*/
protected $numDays;
/** INTEGER The number (24 hour clock) of the first hour in this schedule. */
protected $startTime;
/** INTEGER The number (24 hour clock) of the last hour in this schedule. */
protected $endTime;
/** INTEGER Width of a day in pixels. */
protected $dayWidth;
/** INTEGER Height of an hour in pixels. */
protected $hourHeight;
/** ARRAY List of classes in this schedule. */
protected $classes = array();
//IMAGE INFORMATION FOR THIS SCHEDULE
/** INTEGER X offset for the schedule (leaves room for the hour row headers). */
protected $offsetX = 26;
/** INTEGER Y offset for the schedule (leaves room for the day column headers). */
protected $offsetY = 25;
/** STRING Location of a font to use. Tahoma is from the open source WINE project. */
protected $font = "layout/tahoma.ttf";
/** RESOURCE Default background color. */
protected $background;
/** RESOURCE Default text color. */
protected $foreground;
/** RESOURCE Default background color for class blocks. */
protected $classBackground;
/** RESOURCE Internal image resource. */
protected $img;
/** Whether or not an image has been rendered. */
protected $displayed = false;
/**
* Initializes color and image information and processes arguments from the query string.
*/
public function __construct($size=null) {
if(!$size) {
$size = 438;
}
$this::$width = $size;
$this::$height = round($this::$width*880/670);
$this->setImage(1, 1);
$this->allocateColors();
$this->setImage(SchedulePrinter::$width, SchedulePrinter::$height);
$this->classes = $this->parseClasses($_REQUEST["classes"]);
if(substr($_REQUEST["sem"], -2) != "SU" && $_REQUEST["trad"] != "non") {
//add chapel
$tmp = array();
$tmp[] = 2+8+32;
$tmp[] = 10.83333333333;
$tmp[] = 11.5;
$tmp[] = "Belcher";
$tmp[] = "Chapel";
$this->classes[] = $tmp;
}
if(empty($this->classes)) {
die();
}
//find the first and last class
$this->startTime = 24;
$this->endTime = 0;
$this->startDay = SchedulePrinter::$defaultStartDay;
$this->numDays = SchedulePrinter::$defaultNumDays;
foreach($this->classes as $class) {
if($class[1] < $this->startTime) {
$this->startTime = floor($class[1]);
}
if($class[2] > $this->endTime) {
$this->endTime = ceil($class[2]);
}
if($class[0] & 1) {
//class on Sunday
$this->numDays++;
$this->startDay = 0;
}
if($class[0] & 64) {
//class on Saturday
$this->numDays++;
}
}
}
/**
* Allocates color objects.
*
* @return VOID
*/
public function allocateColors() {
$this->background = imagecolorallocate($this->img, 255, 255, 255);
$this->foreground = imagecolorallocate($this->img, 0, 0, 0);
$this->classBackground = imagecolorallocate($this->img, 253, 255, 79);
}
/**
* Displays the current schedule image.
*
* @return VOID
*/
public function display() {
if(!$this->displayed) {
header('Content-type: image/png');
imagepng($this->img);
$this->displayed = true;
}
}
/**
* Draws an individual class.
*
* @param INTEGER $classDays Bit string of days this class occurs on (see $DAY_NUMBERS below).
* @param FLOAT $startTime 24 floating point representation of the class' start time (hours + minutes/60).
* @param FLOAT $endTime class' end time (see formatting notes for 2).
* @param STRING $location location of the class.
* @param STRING $title Name of the class.
* @return VOID
*/
function drawClass($classDays, $startTime, $endTime, $location, $title, $isOverlay=false) {
for($i = $this->startDay; $i <= $this->numDays; $i++) {
if($classDays & SchedulePrinter::$DAY_NUMBERS[$i]) {
$start = $startTime-$this->startTime;
$end = $endTime-$this->startTime;
if($i == $this->numDays) {
$rectEnd = $this::$width-2;
} else {
$rectEnd = $this->offsetX-2+$this->dayWidth*$i;
}
imagefilledrectangle($this->img, $this->offsetX+$this->dayWidth*($i-1), $this->offsetY+5+$start*$this->hourHeight, $rectEnd, $this->offsetY-5+$end*$this->hourHeight, $this->classBackground);
imagefilledrectangle($this->img, $this->offsetX+5+$this->dayWidth*($i-1), $this->offsetY+$start*$this->hourHeight, $rectEnd-5, $this->offsetY+$end*$this->hourHeight, $this->classBackground);
//rounded edges
//ul
imagefilledellipse($this->img, $this->offsetX+6+$this->dayWidth*($i-1), $this->offsetY+5+$start*$this->hourHeight, 10, 10, $this->classBackground);
//ll
imagefilledellipse($this->img, $this->offsetX+6+$this->dayWidth*($i-1), $this->offsetY-5+$end*$this->hourHeight, 10, 10, $this->classBackground);
//ur
imagefilledellipse($this->img, $rectEnd-5, $this->offsetY+5+$start*$this->hourHeight, 10, 10, $this->classBackground);
//lr
imagefilledellipse($this->img, $rectEnd-5, $this->offsetY-5+$end*$this->hourHeight, 10, 10, $this->classBackground);
$pos = imagettftext($this->img, $this::$fontSize, 0, $this->offsetX+2+$this->dayWidth*($i-1), $this->offsetY+16+$start*$this->hourHeight, $this->foreground, $this->font, $this->wrap($this::$fontSize, 0, $title, $this->dayWidth));
$tmp = $pos[1]-$pos[7]+20;
if($isOverlay) {
$y = $this->offsetY-$tmp/2+$end*$this->hourHeight;
} else {
$y = $this->offsetY+$tmp+$start*$this->hourHeight;
}
//11
//imagettftext($this->img, $this::$fontSize, 0, $this->offsetX+4+$this->dayWidth*($i-1), $y, $this->foreground, $this->font, $location);
if(!$isOverlay) {
//$tmp += 16;
imagettftext($this->img, $this::$fontSize, 0, $this->offsetX+2+$this->dayWidth*($i-1), $this->offsetY+$tmp+$start*$this->hourHeight, $this->foreground, $this->font, Meeting::displayTime($startTime)." - ".Meeting::displayTime($endTime));
}
}
}
}
/**
* Draws all of the classes in this schedule.
*
* @return VOID
*/
public function drawClasses() {
foreach($this->classes as $class) {
$this->drawClass($class[0], $class[1], $class[2], $class[3], $class[4]);
}
if(isset($_REQUEST["overlayClasses"])) {
$this->classBackground = imagecolorallocatealpha($this->img, 80, 80, 255, 80);
$overlay = $this->parseClasses($_REQUEST["overlayClasses"]);
foreach($overlay as $class) {
$this->drawClass($class[0], $class[1], $class[2], $class[4], "", true);
}
}
}
/**
* Draws the hour and day headers and bounding boxes for the schedule.
*
* @return VOID
*/
function drawFrame() {
imagesetthickness($this->img, 1);
//border
imagerectangle($this->img, 0, 1, $this->offsetX - 1, $this->offsetY - 1, $this->foreground);
$this->dayWidth = (SchedulePrinter::$width-$this->offsetX)/$this->numDays;
for($i = 0; $i < $this->numDays; $i++) {
$x = $this->offsetX+$this->dayWidth*$i;
$x1 = $this->offsetX+$this->dayWidth*($i+1);
$midpt = ($x1-$x)/2;
imagerectangle($this->img, $x - 1, 1, $x+$this->dayWidth - 1, SchedulePrinter::$height-1, $this->foreground);
$text = SchedulePrinter::$DAYS[$i+$this->startDay];
$box = imagettfbbox($this::$fontSize+1, 0, $this->font, $text);
$width = $box[4] - $box[0];
imagettftext($this->img, $this::$fontSize+1, 0, round($x+($midpt-$width/2)), 19, $this->foreground, $this->font, $text);
}
//hour headers
$startHour = $this->startTime-1;
$numHours = $this->endTime-$this->startTime;
$this->hourHeight = (SchedulePrinter::$height - $this->offsetY)/$numHours;
for($i = 0; $i < $numHours; $i++) {
$y = $this->offsetY+$this->hourHeight*$i;
imagerectangle($this->img, 0, $y - 1, SchedulePrinter::$width-1, $y+$this->hourHeight - 1, $this->foreground);
imagettftext($this->img, $this::$fontSize-1, 0, 2, $y+12, $this->foreground, $this->font, (($i+$startHour)%12+1).":00");
}
}
/**
* Parses a list of classes into an array of classes' information.
*
* @param STRING $data Data string of the form specified above.
* @return ARRAY List of classes' information.
* @see $classes
*/
protected function parseClasses($data) {
$ret = array();
$tmp = explode("~", urldecode($data));
foreach($tmp as $class) {
if(!empty($class)) {
$tmp = explode("::", $class);
if($tmp[1] != "TBA" && $tmp[1] > 0 && $tmp[0] > 0) {
$ret[] = $tmp;
}
}
}
return $ret;
}
/**
* Creates a new image of the specified size filled with the background color, and cleans up the old one.
*
* @param INTEGER $width Desired image width.
* @param INTEGER $height Desired image height.
* @return VOID
*/
protected function setImage($width, $height) {
if($this->img) {
imagecolordeallocate($this->img, $this->background);
imagecolordeallocate($this->img, $this->foreground);
imagecolordeallocate($this->img, $this->classBackground);
imagedestroy($this->img);
}
if($width && $height) {
$this->img = imagecreatetruecolor($width, $height);
$this->allocateColors();
imagefill($this->img, 0, 0, $this->background);
}
}
/**
* Wraps text.
*
* @param INTEGER $fontSize The size of the font.
* @param INTEGER $angle The angle of the text from vertical.
* @param STRING $string The string to wrap.
* @param INTEGER $width The width of the container.
* @return STRING Text wrapped with newlines.
*/
function wrap($fontSize, $angle, $string, $width){
$ret = "";
$arr = explode(' ', str_replace("/", " /", htmlspecialchars_decode($string)));
foreach($arr as $word) {
$testbox = imagettfbbox($fontSize, $angle, $this->font, $ret.' '.$word);
if ($testbox[2] > $width) {
$ret .= "\n".$word;
} else {
$ret .= ' '.$word;
}
}
return substr($ret, 1);
}
/**
* Cleans up the image associated with this class and writes out a 1x1 placeholder with the current background color.
*
* @return VOID
*/
public function __destruct() {
$this->setImage(1,1);
$this->display();
//yes, the 0, 0 is important. Memory management in destructors is a bit shaky in 5.4RC3
$this->setImage(0, 0);
}
}
$printer = new SchedulePrinter(@$_REQUEST["size"]);
$printer->drawFrame();
$printer->drawClasses();
$printer->display();
?>