Sort Dropbox-uploaded photographs

instasort.sh

#!/usr/bin/env zsh

#
# Functions
#

#
# Check if Photograph is Square
#

is_square() {
    [[ $(identify -format '%w' "$1") == $(identify -format '%h' "$1") ]]
    echo $?
}

#
# Check Mimetype
#

is_image() {
    grep 'image' <<< $(file --mime-type "$1") > /dev/null 2>&1
    echo $?
}

#
# Create Directory from Date in Filename
# Images imported from Dropbox are named in format "2015-12-27 22.13.26.jpg"
#

send_to_dated_directory() {
    local filename_date=${1:0:10}

    if [[ $filename_date =~ ^[0-9]{4}-[0-9]{2}-[0-9]{2}$ ]]; then
        mkdir $filename_date > /dev/null 2>&1
        mv "$1" $filename_date
    fi
}

#
# Variables
#

uploads_folder="${HOME}/Dropbox/Camera Uploads/"
instagram_folder="${HOME}/Dropbox/Photos/Instagram/"

#
# Main Loop
#

if [[ ! -d $uploads_folder ]] || [[ ! -d $instagram_folder ]]; then
    exit 1
fi

cd "$uploads_folder"

for file in *.*; do
    case ${file##*.} in
        gif|png) rm "$file";;
        mov|jpg) mv "$file" ${file// /_} && file=${file// /_};;
    esac

    if [[ -f $file ]]; then
        if [[ $(is_image $file) == 0 ]] && [[ $(is_square $file) == 0 ]]; then
            mv $file "$instagram_folder"
        else
            send_to_dated_directory $file
        fi
    fi
done