knd-ddbank/ddbank.sh

#!/usr/bin/env sh

## **Config file should have the following:
## #Config
## ## Starting balance
## bal="00.00"
## 
## ## Postgres
## ### Database user
## dbuser="ddbank"
## ### Database Port
## dbport="5432"
## ### Datavase host
## dbhost="knd-db01.kniod.corp"
## ### Database name
## datab="ddbank"

## db_conn="psql -h $dbhost -p $dbport -U $dbuser -d $datab -c"

source $HOME/git/knd-ddbank/ddbank_config


# Functions
new_account() {
    clear
    read -p "Enter the name of your account: " user1
    echo ""
    echo "Your account name will be $user1."
    echo ""
    read -n1 -p "Is that correct? [y/N]  " yn

    case $yn in

        # If user selects yes. Insert their username and a timestamp into the database.
        [Yy] ) $db_conn "insert into account (username,timestamp) values ('$user1','now');" &>/dev/null || echo "Username already taken.";
        
        # Sets the user's id as the variable.
        user1_id=$($db_conn "select id from account where username='$user1';" | awk 'FNR == 3 {print}')
        
        # Gives the user the starting balance.
        $db_conn "insert into balance (id,balance) values ('$user1_id',$bal);" &>/dev/null
        
        # Pulls the user's account and ID for awk'ing
        user_account=$($db_conn "select id,username from account;" | grep $user1_id) 
        echo "" 
        acc_id=$(echo "$user_account" | awk -F\| '{print $1}')
        acc_name=$(echo "$user_account" | awk -F\| '{print $2}')
        echo "Account name: $acc_name"
        echo "Account ID: $acc_id"
        ;;
    
        
        # If the user selects anything other than [Yy]
        * ) echo "Aborted"
        ;;

    esac
}

list_user() {
    echo ""
    $db_conn "select * from account;"
    echo ""
}

list_balance() {
    # Bal Menu
    clear
    while true 
    do
        echo ""
        echo "1) List all users balances."
        echo "2) Exact User Search"
        echo "3) User Search" 
        echo "0) Go back."
        echo ""
        read -n1 -p "*Balance Menu: Select from the above: " ii
        echo ""

        case $ii in
            1 ) clear
                $db_conn "select id,username,balance from account join balance using (id);" ;;
            2 ) read -p "Enter the user account name: " ex_mat
                $db_conn "select id,username,balance from account join balance using (id) where username='$ex_mat';" ;;
            3 ) read -p "Enter search term: " bal_user
                    bal_user1=$($db_conn "select id,username,balance from account join balance using (id);")
                    echo "$bal_user1" | awk 'FNR == 1 {print}'
                    echo "$bal_user1" | grep -iE "$bal_user"     
                    echo "" ;;
            [0q] ) break ;;
        esac
    done
}

bank_menu() {
clear
while true
do
    echo ""
    echo "1) Withdraw"
    echo "2) Deposit"
    echo "3) Transfer"
    echo "0) Go Back"
    echo ""
    read -n1 -p "*Banking Menu: Select from the above: " ii_bank
    echo ""

    case $ii_bank in
        [0q] ) break ;;
        1 ) read -p "Withdraw from user: " bank_user 
            read -p "Amount to withdraw: " bank_wth_amt
            echo "$bank_user" | awk 'FNR == 1 {print}' 
            bank_1_amt=$($db_conn "select id,username,balance from account join balance using (id) where username='$bank_user';"| awk 'FNR == 3' | awk -F\| '{print $3}') 
            bank_user_id=$($db_conn "select id,username,balance from account join balance using (id) where username='$bank_user';" | awk 'FNR == 3' | awk -F\| '{print $1}') 
            new_amt=$($db_conn "select balance - '$bank_wth_amt' from balance where id = '$bank_user_id';" | awk 'FNR ==3')
            $db_conn "update balance set balance = '$new_amt' where id = '$bank_user_id';" ;;
        * ) clear ;;
    esac
done
}

clear
while true 
do
    # Main Menu
    echo ""
    echo "DDBank Main Menu: "
    echo "1) Create new user account."
    echo "2) List user accounts."
    echo "3) List user(s) balance."
    echo "4) Banking (Deposit, withdraw, transfer)"
    echo "9) Clear contents of screen"
    echo "0) Exit"
    echo ""
    read -p "Select from the menu above: " -n1 i
    case $i in 
        1 ) new_account     ;;
        2 ) list_user       ;;
        3 ) list_balance    ;;
        4 ) bank_menu       ;;
        9 ) clear           ;;
        0 ) break           ;;  
        * ) clear           ;;
    esac
done

#if [ $i == 1 ]; then {
#    new_account
#} else {
#    echo "Some other thing..."
#} fi