#!/usr/bin/perl -W

# Written by sulfericacid with much help from the monks from this wond
+erful site.

# Modifying an entry isn't enabled on this version, that seems too com
+plex for my abilities right now but if
# you have any pointers on how to accomplish it please let me know!

# I had to use SDBM_File because oddly enough I didn't have DB_File, c
+hange this accordingly.


use strict;
use warnings;
use POSIX;
use Fcntl;
use SDBM_File;

my %dbm;
my $test = "phone.dbm";
my $name;

tie (%dbm, 'SDBM_File', $test, O_CREAT|O_RDWR, 0644)
   || die "Died tying database\nReason: $!";

# Printing option menu   
print "Aaron's Phonebook System\n\n\n";
print "f - find an entry\n";
print "a - add an entry\n";
# print "m - modify an entry\n";
print "d - delete an entry\n";
print "r - read all entries\n";
print "e - erase all entries\n";

chomp(my $option = <STDIN>); 
$option =~s/\r//;

print "Option: $option\n";

#Add An Entry
if ($option eq 'a') {
  print "add an entry test!\n";

  print "Name:";
chomp(my $name = <STDIN>);

  print "Phone number:";
chomp(my $number = <STDIN>);

  print "Email Address:";
chomp(my $email = <STDIN>);

  print "Address Line 1:";
chomp(my $address1 = <STDIN>);

  print "Address Line 2:";
chomp(my $address2 = <STDIN>);

print "$name added to the list!\n";

# combine all data into one nicely snug package...I hope
$dbm{$name}=join "\0",$name,$number,$email,$address1,$address2;
$dbm{$name} =~s/\cM//g;
}

elsif ($option eq 'r') {
  foreach my $key ( sort keys %dbm ) {
    my($name, $number, $email, $addr1, $addr2) = split "\0", $dbm{$key
+};
    print "$name\n$number\n$email\n$addr1\n$addr2\n\n\n";
  }
  }
  
elsif ($option eq 'f') {
  print "Who are you looking for?\n";
  &find;
}
# Delete An Entry
elsif ($option eq 'd') {
  print "What name would you like removed?\n";

  &del;

}
elsif ($option eq 'e') {
  print "To delete all entries press y, to cancel press n\n";

&erase;

}
else {
  print "Wrong button!\n";
}

sub del {
 chomp(my $d = <STDIN>);

  if ($dbm{$d}) {
     delete $dbm{$d};
     print "$d deleted successfully\n";
      }
  else {
     print "$d not found\n";
     }
        }
        
sub find {
   chomp(my $f = <STDIN>);
   # $f=~tr/\r\z//d;
   #$f =~s/\r\z//;
   $f =~s/\cM//g;
     if (exists $dbm{$f}) {
     my($name, $number, $email, $addr1, $addr2) = split "\0", $dbm{$f}
+;  
   print "$name\n$number\n$email\n$addr1\n$addr2\n\n\n";
 }
   else {
     print "Name $f cannot be found in the directory.\n";
}   
      
  }      
        
sub erase {
   chomp(my $e = <STDIN>);
   $e =~s/\r//;

   if ($e eq 'y') {
     %dbm = ();
  
     print "All entries have been deleted.\n";
   }
   elsif ($e eq 'n') {
     print "Deleting process cancelled.\n";
   }
   else {
     print "Key was invalid, deletion process failed\n";
     }
  }        
untie %dbm;