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Chris Pollett > Old Classes > PIC40 ( Print View ) Lecture Notes-PDF Spring '01 Ad: Enrollment info Course Info:
Practice Exams: PIC: |
HW6 Solutions Page
<? if($State=="Save Itinerary"){SetCookies();}
//
// FileName: p40hw6file1.php (Travel Planner program)
// Now with Advertisements
//
// Purpose: This file accesses the airtransportation database to allow
// user to make a travel itinerary based on the flight
// information stored in this database.
//
?>
<html>
<head>
<title>Travel Planner</title>
<script language="javascript" type="text/javascript">
<? //check if we will do the ItinerarySaved page
//
if($State =="Save Itinerary")
{
?>
//
// Load in Our Images for ItinerarySaved page
//
$Car0 = new Image;
$Car0.src = "car0.gif";
$Car1 = new Image;
$Car1.src = "car1.gif";
<? }//end ItinerarySaved Check
//Intro check
//Only need to output VerifyDate when could be on Intro page
if(!$State || $State=="Main Menu" || $State=="Show Flights")
{
?>
//
// Function: VerifyDate()
//
// Purpose: Checks that the date is in the correct format
//
//
function VerifyDate()
{
var $DEPDATE=document.forms[1].DEPDATE.value;
var $BadDate = false, $DateParts, $Part, $i;
var $Month, $Day;
//Split Date into parts make sure has three parts
$DateParts = $DEPDATE.split("-");
if($DateParts.length != 3) {return BadDate();}
//Make sure parts of date of correct length and consist
//of numbers.
if(!( $DateParts[0].length == 4 &&
$DateParts[1].length == 2 &&
$DateParts[2].length == 2)) {return BadDate();}
for ($Part in $DateParts)
{
for($i=0; $i < $Part.length ; $i++)
{ if($Part.charAt($i)<'0' || $Part.charAt($i)> '9')
{return BadDate();}
}
}
$Month = parseInt($DateParts[1]);
$Day = parseInt($DateParts[2]);
if( ($Month == 2 && $Day >28) ||
(($Month == 4 || $Month == 6 || $Month == 9 || $Month == 11)
&& $Day >30) || $Day >31) {return BadDate();}
return true;
}
function BadDate()
{
var $MSG = 'Date format should be YYYY-MM-DD\n';
$MSG += 'where Y=Year, M=Month, D=Day.\n';
$MSG += 'For example, 2001-08-01.\n';
$MSG += 'Make sure the day is correct for\n';
$MSG += 'the month as well. For example, Feb. has\n';
$MSG += '28 days.';
alert($MSG);
return false;
}
<? } //end of Intro Check
// Check again if will do ItinerarySaved page
//
if($State == "Save Itinerary")
{
?>
//
// Function: GoToURL()
//
// Purpose: used by the select object on the ItinerarySaved
// page to immediately jump to selected hotel
//
function GoToURL()
{
var $Hotels = document.forms[0].hotels;
var $Hotel = $Hotels.options[$Hotels.selectedIndex].value;
document.location.href = $Hotel;
}
//
// Function: ChangeImage()
//
// Purpose: changes which car is display on the ItinerarySaved()
// page
//
function ChangeImage($car)
{
document.car.src=$car.src;
}
<? }// End second ItinerarySaved check
?>
</script>
</head>
<body bgcolor="#99FFCC">
<?
//
// Main Loop:
//
// $State variable is used to control which page is displayed
switch($State)
{
case "Fetch Now":
Itinerary("saved");
break;
case "Save Itinerary":
ItinerarySaved();
break;
case "Show Flights":
$MSG = CKAirport();
if($MSG == "Flight")
{Flight();}
else if($MSG != "done")
{Intro($MSG);}
break;
case Previous:
if($SEAT2) {Flight();}
else {SelectSeat();}
break;
case Flight:
Flight();
break;
case "Continue":
if($SEAT)
{Itinerary("unsaved");}
else
{SelectSeat();}
break;
case "Main Menu":
default:
Intro();
}
?>
</body>
</html>
<?
//
// Function: ItinerarySaved()
//
// Purpose: After the itinerary has been saved this page
// provides the user with links to hotels
// and car rental companies in the destination city
//
function ItinerarySaved()
{
GLOBAL $DESCITY;
?>
<h3 style="color:blue">Itinerary Saved</h3>
<h1>Now that you've chosen your trip may we suggest the following
hotels...</h1>
<hr>
<form method="post" action="hw6.php">
<div style="text-align:center">
<table>
<?
if($DESCITY == "YFK")
{?>
<tr><td>
<select name="hotels" onChange="GoToURL()" size="4">
<option value="http://www.centennialhotels.com/" selected="true">
Centenial Hotels Halifax
</option>
<option value="http://www.ramadans.com/">
Ramada Park Place
</option>
<option value="http://www.citadelhalifax.com/">
The Citadel Hotel
</option>
<option value="http://www.waverleyinn.com/">
The Waverley Inn
</option>
</select>
</td></tr>
<tr><td>
<a href="http://www.halifax.worldweb.com/Rentals/CarTrucks/"
onMouseover="ChangeImage($Car1); return true;"
onMouseout="ChangeImage($Car0); return true;">
<img name="car" src="car0.gif" />
</a>
</td></tr>
<tr><td>
<?}
if($DESCITY == "BOS")
{?>
<tr><td>
<select name="hotels" onChange="GoToURL()" size="4">
<option value="http://www.theinnatharvard.com" selected="true">
The Inn at Harvard
</option>
<option value="http://www.fshr.com/locations/Boston/">
Four Seasons
</option>
<option value=
"http://www.MarriottHotels.com/dpp/PropertyPage.asp?MarshaCode=BOSLW">
The Marriot Long Wharf
</option>
<option value=
"http://www.reservation-services.com/radissonhotelboston.html">
Radisson Hotel Downtown
</option>
</select>
</td></tr>
<tr><td>
<a href="http://www.boston-bos.com/car_rental.html"
onMouseover="ChangeImage($Car1); return true;"
onMouseout="ChangeImage($Car0); return true;">
<img name="car" src="car0.gif" />
</a>
</td></tr>
<tr><td>
<?}
if($DESCITY == "LAX")
{?>
<tr><td>
<select name="hotels" onChange="GoToURL()" size="4">
<option value="http://www.holidayinnlongbeach.com" selected="true">
Long Beach Holiday Inn
</option>
<option value="http://www.bestwesternhollywood.com">
Best Western Hollywood
</option>
<option value="http://www.daysinn-maingate.com">
Days Inn Anaheim
</option>
<option value="http://www.esanaheim.com">
Embassy Suites Anaheim
</option>
</select>
</td></tr>
<tr><td>
<a href="http://www.la-rentacar.com/"
onMouseover="ChangeImage($Car1); return true;"
onMouseout="ChangeImage($Car0); return true;">
<img name="car" src="car0.gif" />
</a>
</td></tr>
<tr><td>
<?}
if($DESCITY == "CDG" || $DESCITY == "ORY" )
{?>
<tr><td>
<select name="hotels" onChange="GoToURL()" size="4">
<option value="http://www.ritz.com/" selected="true">
The Ritz Paris
</option>
<option value="http://www.fourseasons.com/locations/Paris/index.php">
Hotel George V
</option>
<option value="http://www.sofitel.mgn.fr/">
Sofitel
</option>
<option value="http://www.hotels-parisiens.com/">
Comfort Inns in Paris
</option>
</select>
</td></tr>
<tr><td>
<a href="http://www.deluxe-international.com/"
onMouseover="ChangeImage($Car1); return true;"
onMouseout="ChangeImage($Car0); return true;">
<img name="car" src="car0.gif" />
</a>
</td></tr>
<tr><td>
<?}
OutButton(submit,"State","Main Menu");
?>
</td></tr>
</table>
</div>
</form>
<?
}
//
// Function: Intro
//
// Purpose: This function takes a message $MSG and if it exists
// outputs in blue followed by the intro screen to
// the Travel Planner program. If $MSG is false it
// just outputs the intro screen. If $MSG has some value
// then any of the form variables is not set it also
// outputs a star by this element in the intro screen.
//
function Intro($MSG=false) {
GLOBAL $DEPCITY, $DESCITY, $DEPDATE;
if ($MSG) {print "<h3 style=\"color:blue\"> $MSG</h3>";}
?>
<h1>Travel Planner</h1>
<form method="POST" action="hw6.php" >
<h3>Previous Itinerary:
<? OutButton("submit","State","Fetch Now");?>
</h3>
</form>
<hr>
<form method="POST" action="hw6.php" onSubmit="return VerifyDate();">
<table border="0" cellpadding="3" cellspacing="3">
<tr>
<td><b>Departure City or Airport:</b></td>
<td><? OutText("DEPCITY", "$DEPCITY", 15, 80);
if($MSG && !$DEPCITY) {OutStar();}
?>
</td>
</tr>
<tr>
<td><b>Destination City or Airport:</b></td>
<td><? OutText("DESCITY", "$DESCITY", 15, 80);
if($MSG && !$DESCITY) {OutStar();}
?>
</td>
</tr>
<tr>
<td><b>Departure Date:</b></td>
<td><? OutText("DEPDATE", "$DEPDATE", 15, 80);
if($MSG && !$DEPDATE) {OutStar();}
?>
</td>
</tr>
<tr>
<td></td>
<td>YYYY-MM-DD
</td>
</tr>
<td align="center" colspan="2">
<h3>
<?OutButton("reset","reset","Reset");
OutButton("submit","State","Show Flights");?>
</h3>
</td>
</table>
</form>
<?}
//
// Function:CKAirport
//
// Purpose: this function check if the three variables
// $DEPCITY, $DESCITY, $DEPDATE all have values.
// If not it returns the string "Sorry, you did not give
// me enough data. Please fill in the starred fields."
// Otheriwse, it looks at the Airport table of the airtransportation
// database to see if $DEPCITY and $DESCITY are codes for
// airports or are cities. If they are cities but there
// is only one airport in that city the $DEPCITY or $DESCITY
// is then set to the code of that airport. If at this
// point both $DEPCITY and $DESCITY are codes of airports
// then the value "Flight" is returned. If neither a code nor
// a city could be found then "Sorry we not service $DEPCITY"
// or "Sorry we nor service $DESCITY" or both is returned
// by CKAirport. Finally, if there is more airport for $DESCITY
// of $DEPCITY of both it produces a form with selection
// selection gadgets to let the user pick between the possibilities.
// after generating this form it returns the value "done".
//
function CKAirport()
{
GLOBAL $DEPCITY, $DESCITY, $DEPDATE;
$DEPCITY=DeleteSharp($DEPCITY);
$DESCITY=DeleteSharp($DESCITY);
if (!($DEPCITY && $DESCITY && $DEPDATE))
{
$ERRMSG = "Sorry, you did not give me enough data. Please";
$ERRMSG .= " fill in the starred fields.";
return $ERRMSG;
}
$dbh=Connect();
$cur=Prepare("select code from Airport where city='$DEPCITY'
OR code='$DEPCITY'");
if(NumRows($cur)==0) { $ERRMSG.=
"Sorry, we do not service $DEPCITY.<br />\n";
$DEPCITY = false;
}
if(NumRows($cur)==1) {$row=FetchRow($cur);
$DEPCITY = $row[0];
$isAirport1=true;
}
FreeCursor($cur);
$cur=Prepare("select code from Airport where city='$DESCITY'
OR code='$DESCITY'");
if(NumRows($cur)==0) { $ERRMSG .=
"Sorry, we do not service $DESCITY.<br />\n";
$DESCITY = false;
}
if(NumRows($cur)==1) {
$row=FetchRow($cur);
$DESCITY = $row[0];
$isAirport2=true;
}
FreeCursor($cur);
if(!$DEPCITY || !$DESCITY) {Close($dbh); return $ERRMSG;}
if($isAirport1 && $isAirport2) {Close($dbh); return "Flight";}
?>
<form method="POST" action="hw6.php"> <?
$cur=Prepare("select code from Airport where city='$DEPCITY'");
if(NumRows($cur) > 1) {
print "<h3> Please select a departure airport:</h3>\n";
DrawSelect($cur,"DEPCITY",2);
print "<br />";
}
else { OutButton("hidden","DEPCITY","$DEPCITY");}
FreeCursor($cur);
$cur=Prepare("select code from Airport where city='$DESCITY'");
if(NumRows($cur) > 1) {
print "<h3> Please select a destination airport:</h3>\n";
DrawSelect($cur,"DESCITY",2);
print "<br />";
}
else { OutButton("hidden","DESCITY","$DESCITY");}
FreeCursor($cur);
OutButton("hidden","DEPDATE","$DEPDATE");
OutButton("submit","State","Main Menu");
OutButton("submit","State","Show Flights");
?> </form> <?
Close($dbh);
return "done";
}
//
// Function: Flight
//
// Purpose: produces the screen that allows the user to
// select the from a list of available flights
// between $DEPCITY and $DESCITY on $DEPDATE.
// Queries the airtransportation database Flight
// table to get this info.
//
function Flight()
{
GLOBAL $DEPCITY, $DESCITY, $DEPDATE;
$dbh=Connect();
$cur=Prepare("select flightNo, airCraftName, dateTime
from Flight
where fromAirport='$DEPCITY'
AND toAirport='$DESCITY'
AND dateTime like '$DEPDATE%'");
?>
<h1>Travel Planner</h1>
<hr>
<form method="POST" action="hw6.php">
<table>
<tr>
<td>
<h3>Please select a flight:</h3>
</td>
</tr>
<tr>
<td>
<?
DrawSelect($cur, "FLIGHT", 10);
Close($dbh);
?>
<td>
</tr>
<tr>
<td>
<? OutButton("hidden","DEPCITY",$DEPCITY);
OutButton("hidden","DESCITY",$DESCITY);
OutButton("hidden","DEPDATE",$DEPDATE);
OutButton("submit","State","Main Menu");
OutButton("submit","State","Continue");
?>
</tr>
</td>
</table>
</form>
<?}
//
// Function: SetCookies
//
// Purpose: sets cookies to store the variables
// $DEPCITY, $DESCITY, $DEPDATE, $FLIGHT, $SEAT
//
function SetCookies()
{
GLOBAL $DEPCITY, $DESCITY, $DEPDATE, $FLIGHT, $SEAT;
SetCookie("DEPCSAVE","$DEPCITY");
SetCookie("DESCSAVE","$DESCITY");
SetCookie("DEPDSAVE","$DEPDATE");
SetCookie("FLIGHTSAVE","$FLIGHT");
SetCookie("SEATSAVE","$SEAT");
}
//
// Function: Itinerary
//
// Purpose: if $saved is equal to "saved". It copies the variables
// stored in the cookies back into the variables
// $DEPCITY, $DESCITY, $DEPDATE, $FLIGHT, $SEAT first.
// In all cases, it then draws the itinerary that the
// user has selected so far followed by the buttons
// Main Menu, Previous, and Save Itinerary.
// these either return to the Intro screen, select seat
// screen or returns to Intro screen with saved info
// message and where the first line of the program has been
// execute to set the appropriate cookies.
//
function Itinerary($saved)
{ GLOBAL $DEPCITY, $DESCITY, $DEPDATE, $FLIGHT, $SEAT;
GLOBAL $DEPCSAVE, $DESCSAVE, $DEPDSAVE, $FLIGHTSAVE, $SEATSAVE;
if($saved=="saved")
{
if(!$DEPCSAVE) return Intro("No previous itinerary");
$DEPCITY=$DEPCSAVE;
$DESCITY=$DESCSAVE;
$DEPDATE=$DEPDSAVE;
$FLIGHT=$FLIGHTSAVE;
$SEAT=$SEATSAVE;
}
$flArray = split( "#", $FLIGHT);
$flightNo = $flArray[0];
?>
<h1>Travel Planner</h1>
<hr>
<h3>Your current schedule is as follows:</h3>
<p>You are leaving on: <? print "$DEPDATE."; ?></p>
<p>You are flying from: <? print "$DEPCITY."; ?></p>
<p>You are flying to: <? print "$DESCITY."; ?></p>
<p>The flight number is: <? print "$flightNo."; ?></p>
<p>Your seat is: <? print "$SEAT."; ?></p>
<form method="POST" action="hw6.php">
<? OutButton("hidden","DEPCITY",$DEPCITY);
OutButton("hidden","DESCITY",$DESCITY);
OutButton("hidden","DEPDATE",$DEPDATE);
OutButton("hidden","FLIGHT",$FLIGHT);
OutButton("hidden","SEAT",$SEAT);
OutButton("submit","State","Main Menu");
OutButton("submit","State","Previous");
OutButton("submit","State","Save Itinerary"); ?>
</form>
<?
}
//
// Function: SelectSeat
//
// Purpose: This function draws the screen to allow the user to pick a
// from the available seats on a given flight.
//
function SelectSeat()
{
GLOBAL $DEPCITY, $DESCITY, $DEPDATE, $FLIGHT;
$flArray = split( "#", $FLIGHT);
$flightNo = $flArray[0];
$aircraft = $flArray[1];
$dateTime = $flArray[2];
?>
<h1>Travel Planner</h1>
<hr>
<form method="POST" action="hw6.php">
<table>
<tr>
<td>
<h3>Please select a seat:</h3>
</td>
</tr>
<tr>
<td>
The information below is formatted as follows:
</td>
</tr>
<tr>
<td>
Row#Seat#Aisle?#Window?#Class
</td>
</tr>
<tr>
<td>
<?
print "<select name=\"SEAT\" size=\"10\">\n";
$flag=true;
$dbh=Connect();
//
// Notice I open up two cursors at this point. I wouldn't
// need to do this on a database
//
$cur=Prepare("select rowNo, seat,aisle,window, class
from AircraftRow
where airCraftName = '$aircraft'");
while($row = FetchRow($cur))
{
$cur2=Prepare("select rowNo, seat from Bookings
where flightNo='$flightNo'
and dateTime='$dateTime'
and rowNo='$row[0]' and seat='$row[1]' ");
if(!FetchRow($cur2))
{
OutOption($flag,$row);
if($flag) {$flag=false;}
}
}
Close($dbh);
?>
</select>
<td>
</tr>
<tr>
<td>
<? OutButton("hidden","DEPCITY",$DEPCITY);
OutButton("hidden","DESCITY",$DESCITY);
OutButton("hidden","DEPDATE",$DEPDATE);
OutButton("hidden","FLIGHT",$FLIGHT);
OutButton("hidden","SEAT2","true");
OutButton("submit","State","Main Menu");
OutButton("submit","State","Previous");
OutButton("submit","State","Continue");
?>
</tr>
</td>
</table>
</form>
<?}
//
// Function: OutButton
//
// Purpose: draws to screen a button of type $type with name $name
// and with value $value.
//
function OutButton($type,$name,$value)
{
print "<input type=\"$type\" name=\"$name\" value =\"$value\" />";
}
//
// Function: OutText
//
// Purpose: draws to screen a textfield of type $type with name $name
// and with value $value of size $size and max number of char's
// maxlength.
//
function OutText($name,$value,$size,$maxLength)
{
print "<input type=\"text\" name=\"$name\" value =\"$value\"";
print " size=\"$size\" maxlength=\"$maxLength\" />";
}
//
// Function: OutStar
//
// Purpose: draws a bold-face blue star
//
function OutStar()
{
print "<b style=\"color:blue\">*</b>\n";
}
//
// Function: OutOption
//
// Purpose: Writes out an option of a selection gadget
// If $selected is true this will be a selected option
// of the selection gadget. $row is the value of the option.
//
function OutOption($selected,$row)
{
if($selected) {print "<option selected=\"true\">";
$flag=false;
}
else {print "<option>";}
foreach($row as $field)
{
print "$field#";
}?>
</option>
<?}
//
// Function: DeleteSharp
//
// Purpose: returns the substring of $string before the first # symbol
//
function DeleteSharp($string)
{
$row=split("#",$string);
return $row[0];
}
//
// Function:DrawSelect
//
// Purpose: Draws a selection gadget with name $name where the options
// are given by cycling over the rows returned by the database
// cursor $cursor.
//
function DrawSelect($cursor, $name, $rowsVisible)
{
print "<select name=\"$name\" size=\"$rowsVisible\">\n";
$flag=true;
while($row = FetchRow($cursor))
{
OutOption($flag,$row);
if($flag) { $flag=false;}
}?>
</select>
<?}
//
// Function:Connect
//
// Purpose: connect to the database system.
//
function Connect()
{
return mysql_connect("localhost", "pic40", "pic40");
}
//
// Function: FetchRow
//
// Purpose:
//
function FetchRow($cursor)
{
return mysql_fetch_row($cursor);
}
//
// Function:NumRows
//
// Purpose: returns the numbers of rows left in database cursor $cursor.
//
function NumRows($cursor)
{
return mysql_num_rows($cursor);
}
//
// Function: Prepare
//
// Purpose: prepares an SQL query to be executed
//
function Prepare($query)
{
return mysql_db_query("airtransportation", $query);
}
//
// Function:FreeCursor
//
// Purpose: frees a cursor
//
function FreeCursor($cursor)
{
mysql_free_result($cursor);
}
//
// Function: Close
//
// Purpose: closes a database handle $dbhandle
//
function Close($dbhandle)
{
mysql_close($dbhandle);
}
?>
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