#!/usr/bin/env zsh
# grab files from ipfs

source "$HOME/.config/init/helpers" || exit 1

setopt HIST_SUBST_PATTERN

local pat='^http://localhost:8080/ipfs/.+\?filename=.+$'

local name
local hash

local escapes
typeset -A escapes
escapes=('%20' ' ' '%22' '"' '%23' '#' '%24' '$'
         '%25' '%' '%26' '&' '%27' "'" '%2b' '+'
         '%2C' ',' '%2F' '/' '%3A' ':' '%3B' ';'
         '%3C' '<' '%3D' '=' '%3E' '>' '%3F' '?'
         '%40' '@' '%5B' '[' '%5C' '\' '%5D' ']'
         '%5E' '^' '%60' '`' '%7B' '{' '%7C' '|'
         '%7D' '}' '%7E' '~' '%28' '(' '%29' ')')

[[ "$1" ]] \
    || abort "please specify at least one url to get"

for i in $@; do
	[[ $i =~ $tpat ]] \
		|| abort "bad url \`$i\`"
done

for i in $@; do
	name=${i:s/*\filename=/}
	for k in ${(@k)escapes}; name=${name:gs/$k/$escapes[$k]/}

	hash=${i:s|http://localhost:8080/ipfs/|}
	hash=${hash:s|\?filename=*|}

	ipfs get -o $name $hash
done