Tell us what’s happening:
Hi. I cannot pass " The variable will be t or empty. Below the if not available comment, add an if condition that checks if it’s empty. Put the send to main menu comment in it’s statements area." Tried copying the solution, reseting the code to toutorial’s standard progress, still getting error “Your “MAIN_MENU” function should have the correct “if” condition added”. Any idea ?
Your code so far
#!/bin/bash
PSQL="psql -X --username=freecodecamp --dbname=bikes --tuples-only -c"
echo -e "\n~~~~~ Bike Rental Shop ~~~~~\n"
MAIN_MENU() {
if [[ $1 ]]
then
echo -e "\n$1"
fi
echo "How may I help you?"
echo -e "\n1. Rent a bike\n2. Return a bike\n3. Exit"
read MAIN_MENU_SELECTION
case $MAIN_MENU_SELECTION in
1) RENT_MENU ;;
2) RETURN_MENU ;;
3) EXIT ;;
*) MAIN_MENU "Please enter a valid option." ;;
esac
}
RENT_MENU() {
# get available bikes
AVAILABLE_BIKES=$($PSQL "SELECT bike_id, type, size FROM bikes WHERE available = true ORDER BY bike_id")
# if no bikes available
if [[ -z $AVAILABLE_BIKES ]]
then
# send to main menu
MAIN_MENU "Sorry, we don't have any bikes available right now."
else
# display available bikes
echo -e "\nHere are the bikes we have available:"
echo "$AVAILABLE_BIKES" | while read BIKE_ID BAR TYPE BAR SIZE
do
echo "$BIKE_ID) $SIZE\" $TYPE Bike"
done
# ask for bike to rent
echo -e "\nWhich one would you like to rent?"
read BIKE_ID_TO_RENT
# if input is not a number
if [[ ! $BIKE_ID_TO_RENT =~ ^[0-9]+$ ]]
then
# send to main menu
MAIN_MENU "That is not a valid bike number."
else
# get bike availability
BIKE_AVAILABILITY=$($PSQL "SELECT available FROM bikes WHERE bike_id = $BIKE_ID_TO_RENT AND available = true")
echo $BIKE_AVAILABILITY
# if not available
if [[ -z $BIKE_AVAILABILITY ]]
then
# send to main menu
fi
# send to main menu
fi
fi
}
RETURN_MENU() {
echo "Return Menu"
}
EXIT() {
echo -e "\nThank you for stopping in.\n"
}
MAIN_MENU
Your browser information:
User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36
Challenge Information:
Learn Bash and SQL by Building a Bike Rental Shop - Build a Bike Rental Shop
