#!/bin/bash
#### Add new records to file "emp" ####
file="emp"

## Assign an ID number.
touch $file
let number=`wc -l $file`
let id=$number+1

if [ "$1" = "" ] || [ "$2" = "" ]
then
   echo USAGE:
   echo "   addname First Middle Last"
   echo "   addname First Last"
fi


## Check args
if test $# -gt 3
then
        echo "ERROR:  too many arguments (2 or 3 only)";  exit
fi
#
if test -z $1 || test -z $2
then
        echo "ERROR:  addname requires two or three arguments.";  exit
fi

## Extract the name.
first=$1
if test "$3" = ""
then
        middle=""       # No middle name
        last=$2
else
        middle="$2"
        last=$3
fi
name="$first:$middle:$last"


## Check for duplicate name.
echo NAME: $name
grep "$name" $file
dup=`grep "$name" $file`
if test -n "$dup"
then
        echo "ERROR:  Duplicate name:  $name"
        exit
fi

## Now, get the phone number.
echo -n "Phone number:  "
read phone
if test $phone = 0
then
        echo "ERROR:  Phone number cannot be zero!";  exit
fi

## Year hired
echo -n "Year hired:    "
read hired
if test $hired = 0
then
        echo "ERROR:  Must be a year greater than zero."; exit
fi

## Get birth year; compute age when hired.)
echo -n "Birth year:    "
read born
if test $born -le 0
then
        echo "ERROR:  Must be a year greater than zero."; exit
fi
let age=$hired-$born
echo "Age when hired:  $age"

## Job
echo "Job"
read job

## Construct the record.
record="$phone:$name:$id:$hired:$age:$job"
echo $record
echo $record >> $file               # Append to file
echo `wc -l $file` records on file.
exit