#!/usr/bin/perl

# Script to remove annoying characters of names in a directory.

# Author: Jorge Carrasco Muriel
# Date of creation: 27/02/2019

use strict;
use warnings;

sub trim{
    my $new_name = $_[0];
    $new_name =~ s/[\(\)\s]//g;
    rename $_[0], $new_name;
    return $new_name;
}

sub qesp{
    my $target_dir = $_[0];
    my $recursive = $_[1] ? $_[1] : 0;
    if ($target_dir =~ /\/$/){
        chop $target_dir
    }
    opendir(DIR, $target_dir);
    my @files = readdir(DIR); # all files/dirs in dir
    closedir(DIR);
    foreach my $f (@files) {
        my $nf = trim("$target_dir/$f");
        if ($recursive && -d $nf && $f !~ /^\./g){
            # avoid hidden, self and top directories
            qesp($nf, "T")
        }
    }
}

my $usage = "Script to remove annoying characters of names in a directory.
qesp [target_dir] [-r | --recursive]
    - target_dir: default '.';
    - -r, --recursive: recursively attempts to rename whole directory tree;
    - -h, --help: prints this usage text and exit.\n";
my $target_dir = "."; # default directory
my $r = 0; # default NOT recursive
my @params = @ARGV;
# parameters handling
foreach my $p (@params) {
    if ($p eq "-r" || $p eq "--recursive"){
        $r = "T";
        print "Recursively qesping...\n"
    } elsif ($p eq "-h" || $p eq "--help" || $p eq "-help"){
        print $usage;
        exit 0;
    } elsif ($p =~ /^-/g){
        print "Unknown parameter: $p.\n'qesp -h' for usage.\n";
        exit 1;
    }
}
@params = grep { $_ !~ /^-/g} @params;
# if there's still a parameter, it's the directory
if ( $params[0] ) {
    $target_dir = $params[0]
}
qesp($target_dir, $r)