FindCust

#!/bin/bash
# Kevin Fan (26/4/17)
# Description: This script allows the user to search for an existing customer based upon
# any of the customers personal information

# Clear the console
clear

# Function that ask for user for search term and and then call the checkInput option 
function readInput
{
	#Asks user for search term
	printf "\nPlease enter any of the customer information to search for: "

	#Takes in serch term as parameter
	read input
	checkInput
}

# Function that checks the search term input and displays relevant options
function checkInput
{
	# If no input is detected, the readInput function is called again for user to re-enter
	if [ -z $input ]; then
		clear
		printf "\n\tNo entry detected. Please re-enter search term\n"
		readInput
	# If matches are found, the mathces are displayed, and the actionAfterSearch is called
	elif [[ $(grep -i -c $input CustomerDetails) -ne 0 ]]; then
		printf "\n$(grep -i -c $input CustomerDetails) match(s) were found:\n"
		grep -i $input CustomerDetails 
		actionAfterSearch
	# If no matches are found, the actionAfterSearch is called
	elif [[ $(grep -i -c $input CustomerDetails) -eq 0 ]]; then
		printf "\nNo matches were found\n"
		actionAfterSearch
	fi
}

# Function that displays options for user after the first search
# Users can perform another search or return to main menu
function actionAfterSearch
{
	# Local variable to control while loop
	validChoice=false
	while [[ $validChoice = false ]]; do
		printf "\nPerform another search (Y/N):"
		read choice
		clear
		# User choice to converted to upper case, and if its Y then set the validChoice varible to valid to exit loop and call the readInput function
		# to search again
		if [[ ${choice^^} = 'Y' ]]; then
			validChoice=valid
			readInput
		# User choice to converted to upper case, and if its Y then set the validChoice varible to valid to exit loop and return to menu script
		elif [[ ${choice^^} = 'N' ]]; then
			validChoice=valid
		else
		# All other cases print out invalid option
			printf "\nNot a valid option"
		fi
	done
}

# Calls the readInput function that begins the search loop. This loop is exited to main menu 
# only at revelvant options
readInput