Learn Bash and SQL by Building a Bike Rental Shop - Build a Bike Rental Shop

Backend Development
1

Tell us what’s happening:
This portion of the checklist is not passing successfully:

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.

The error message indicates:
Your “MAIN_MENU” function should have the correct “if” condition added

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

  # send to main menu

fi

fi
}

RETURN_MENU() {
echo “Return Menu”
}

EXIT() {
echo -e “\nThank you for stopping in.\n”
}

MAIN_MENU

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Challenge: Learn Bash and SQL by Building a Bike Rental Shop - Build a Bike Rental Shop

Link to the challenge: