Write a bash script named “MyWallet.sh” managing a simple bill system. Every bil

Question

Write a bash script named “MyWallet.sh” managing a simple bill system. Every bill corresponds to a record (line) in a text file named “bills.txt” (if this file is inexistent, create it). Each record consists of 7 fields (record ID, category, detail, amount, year, month, day) separate by percent sign (%).

e.g.:

1%restaurant%subway%5.58%2016%2%11

2%gas station%shell%20.15%2016%3%1

-No percent sign (%) in each field.

-The “record ID” is unique, and generated by this system automatically. (when create a new record, the ID should be the last record’s ID number + 1.)

-The category, detail, and amount are input by user.

-The date (year, month,day) is generated by this system by using the record creation time. (Year: date “+%Y” ; Month: date “+%m” ; Day: date “+%d”)

-MyWallet.sh should provide a menu with following functionalities that users can choose from at the top level menu:

1. Enter “a” to add a new bill • Ask for category

• Ask for detail

• Ask for amount

• Generate record ID and date

• Add this new record into “bills.txt” file

• At the end, print “New bill added successfully”

• Provide option “t” for “Try again” and “b” for “Back to main menu”

2.Enter “d” to remove a bill

• Ask for record ID

• Examine if this record exits. if no, print a message “No such record!”, otherwise, display this record and remove it from “bills.txt” file.

• Provide option “t” for “Try again” and “b” for “Back to main menu”

3.Enter “c” to count amount

• Ask for time range (start date(year, month,day) and end date(year,month,day))

• Count and display amount of all bills in this time period.

• Provide option “t” for “Try again” and “b” for “Back to main menu”

4. Enter “v” to view bills

• Ask for search type (by category, by time, or by record ID)

• Ask for category if by category • Ask for time range if by time

• Ask record ID if by record ID

• Display all bills satisfied the condition

• Provide option “t” for “Try again” and “b” for “Back to main menu”

5.Enter “q” to quit this system

• Terminate this system

Explanation / Answer

#!/bin/bash

#id_values contents intial value 0

RecordID=$(cat /id_values)
RecordID=RecordID+1;
echo "$RecordID" >/id_values

echo "Enter options "
read OPT

enter_details()
{
echo "Please enter category, details and amount"
read CATEGORY
read DETAILS
read AMOUNT
YEAR=$(date+%y);
MONTH=$(date+%m);
DAY=$(date+%d);
}

if [ $OPT="a" ]
then
enter_details

echo "Please confirm to save the data y or n"
read CON

if [ $CON ="y" ]
then
echo "$RecordID,$CATEGORY,$DETAILS,$AMOUNT,$YEAR,$DAY" > > /bill.txt
echo "New bill added successfully"
break;
elif [ $CON="n" ]
enter_details
fi

elif [ $OPT="d" ]
then
echo "Please enter the recordID"
read recordID

sed '$recordID d' /bill.txt

elif [ $OPT="q" ]
then
break;
fi

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