source "$DOROTHY/sources/bash.bash"

# =====================================

# Arguments

function help {

cat <<-EOF >/dev/stderr

ABOUT:

Take PDF <input>s that have passwords, and save copies that have the passwords removed.

USAGE:

pdf-decrypt [--password=<password>] ...<input>

EXAMPLE:

pdf-decrypt -- *.pdf

EOF

if [[ $# -ne 0 ]]; then

echo-error "$@"

fi

return 22 # EINVAL 22 Invalid argument

}

# process

local item option_inputs=() option_password=''

while [[ $# -ne 0 ]]; do

item="$1"

shift

case "$item" in

'--help' | '-h') help ;;

'--password='*) option_password="${item#*=}" ;;

'--')

option_inputs+=("$@")

shift $#

break

;;

'--'*) help "An unrecognised flag was provided: $item" ;;

*) option_inputs+=("$item") ;;

esac

done

# =====================================

# Dependencies

setup-util-qpdf --quiet

# =====================================

# Act

local index filepath filename

local filenames=()

for index in "${!option_inputs[@]}"; do

filepath="${option_inputs[index]}"

filename="$(fs-filename -- "$filepath")"

filenames[index]="$filename"

done

local password

password="$(

ask --required --password \

--question='Enter the decryption password for the PDFs' \

--question="$(echo-lines --columns -- "${filenames[@]}")" \

--default="$option_password"

)"

local outpath

for index in "${!option_inputs[@]}"; do

filepath="${option_inputs[index]}"

filename="${filenames[index]}"

outpath="$item [decrypted].pdf"

eval-helper --quiet \

--pending="$(echo-style --bold='Decrypting ' --code="$filepath" --bold=' to ' --code="$outpath")" \

--success="$(echo-style --bold+green='Decrypted ' --code="$filepath" --bold=' to ' --code="$outpath")" \

--failure="$(echo-style --bold+red='Failed to decrypt ' --code="$filepath" --bold=' to ' --code="$outpath")" \

-- qpdf -password="$password" -decrypt "$filepath" "$outpath" || :

done