Shell Script File Organization

file_organizer.sh

#!/bin/zsh

UNSORTED_DIR=./sample_files/*
MEMORIA_DIR=./memoria
OTHER_DIR=./other_files

image_formats="jpg|jpeg|jif|jfif|jp2|jpx|j2k|j2c|tif|gif|pfx|pcd|png"
video_formats="3g2|3gp|asf|avi|flv|m4v|mov|mp4|mpg|rm|srt|swf|vob|wmv"

for some_file in $UNSORTED_DIR
do
  year=$(date -r "$some_file" +%Y)
  date=$(date -r "$some_file" +%Y-%m-%d)

  if file --mime-type "$some_file" | egrep -wi "$image_formats|$video_formats"
  then
    $dir_name="$MEMORIA_DIR/$year/$date"
  else
    $dir_name="$OTHER_DIR/$year/$date"
  fi

  mkdir -p $dir_name
  cp -- "$some_file" "$dir_name/"
  echo "$some_file" >> "$dir_name/file_list.txt"

done