‘Housekeeping’ script to create folder and move files

I have been trying to investigate how to automate a script (shell or other) that periodically (once an hour for example) moves files with a constant naming convention to a folder (which is automatically created if not already there). The files are like this:

Camera1_01_20171213221830928.jpg
Camera1_01_20171213223142881.mp4

Basically it will be doing ‘housekeeping’.

I’m new to shell scripts, and I just can’t work out how to create a folder if it is not there (folder called 20171213 for example), then move the relevant files into it?

Any help would be greatly appreciated.

Answer

I finally went with a perl script which I could more easily trigger from a cron job:

#!/usr/bin/perl -w

use strict;
use Data::Dumper;
use File::Copy;

main();

sub main
{
    my $dir = "/srv/NAS1/Camera1";

    opendir(my $fh, $dir) or die("Could not open '$dir' for reading: $!n");

    my @files = readdir($fh);

    closedir($fh);

    foreach my $file(@files)
    {
        if(-d $file)
        {
            next; # skip file if its a folder
        }

        if($file =~ /Camera1_01_(d{8})d{9}.(jpg|mp4)/)
        {
            my $date = $1;

            $date =~ /(d{4})(d{2})(d{2})/;

            my $folder = "$1-$2-$3";

            # if the directory doesn't exist
            if(!(-e -d "${dir}/${folder}"))
            {
                mkdir("${dir}/${folder}");
            }

            move("${dir}/$file","${dir}/${folder}");
        }
    }
}

Thanks for the contributions.