get/create session
if ('usertype' param in session == 'm') {
get form params
validate form
check if Airport Code already exists in the database
if ((form params are in the correct format) AND(airport code doesn't already exist in the database)) {
for (number of Add Airport Forms submitted) {
if('new/existing city' param in the form == 'new') {
if (the city name is already in the database) {
display an Add Airport Form with an error message
}
else {
add the new city to the database and get the id of it
}
add the Airport to the database
display success message with link to View Airport
}
else {
add the Airport to the database
display success message with link to View Airport
}
}
if (there's a 'newRoute' param in the session) { //manager's been adding new route
get the newRoute details from the session
if (there was only one Add Airport Form) {
if ('from' field in newRoute data == 'new') {
set 'from' to be the Airport added
}
else if ('to' field in newRoute data == 'new') {
set 'to' to be the Airport added
}
add Route to the database
delete all data from session except 'username' and 'usertype'
}
else if (there were two Add Airport Forms) {
set 'from' to be the Airport in the first form
set 'to' to be the Airport in the second form
add Route to the database
delete all data from session except 'username' and 'usertype'
display success message with link to View Route
}
}
}
else {
display an Add Airport Form with an error message
}
}
else {
error message to say user must be a manager
}