package PM::SharedFileTasks;

use strict;
use warnings;
use autodie;

my %handler_for = (
    modify => \&handle_modify,
    move => \&handle_move,
);

sub handle {
    my ($function, $files) = @_;

    for my $file (@$files) {
        open my $fh, '<', $file;
        chomp(my @record = split /:/ => (<$fh>)[-1]);
        print "Function: '$function'; File: '$file'\n";
        $handler_for{$function}->(\@record);
        close $fh;
    }
}

sub handle_modify {
    my $status = shift->[5];
    # Do something with $status, e.g.
    print "$status\n";
    return;
}

sub handle_move {
    my $city = shift->[3];
    # Do something with $city, e.g.
    print "$city\n";
    return;
}

1;

##</code><code>##

#!/usr/bin/env perl

use strict;
use warnings;

use PM::SharedFileTasks;

{
    # In modify.pl
    my @files = qw{pm_1076160_1.txt pm_1076160_2.txt};
    PM::SharedFileTasks::handle(modify => \@files);
}

{
    # In move.pl
    my @files = qw{pm_1076160_2.txt pm_1076160_3.txt};
    PM::SharedFileTasks::handle(move => \@files);
}

##</code><code>##

$ cat pm_1076160_1.txt
Record 1
...
Record n-1
ID1:Name1:Street1:City1:State1:Status1

$ cat pm_1076160_2.txt
Record 1
...
Record n-1
ID2:Name2:Street2:City2:State2:Status2

$ cat pm_1076160_3.txt
Record 1
...
Record n-1
ID3:Name3:Street3:City3:State3:Status3

##</code><code>##

Function: 'modify'; File: 'pm_1076160_1.txt'
Status1
Function: 'modify'; File: 'pm_1076160_2.txt'
Status2
Function: 'move'; File: 'pm_1076160_2.txt'
City2
Function: 'move'; File: 'pm_1076160_3.txt'
City3