#!/usr/bin/env zsh
# Converts mxc:// URLs into https:// URLs

setopt LOCAL_OPTIONS ERR_RETURN NO_UNSET PIPE_FAIL

zmodload zsh/zutil
local -a o_help=()
local -a o_server=()
zparseopts -D -K -- h=o_help -server:=o_server
if [[ ${#o_help} -ne 0 || ! -v 1 ]]; then
    local ret=$(( ${#o_help} ^ 1 ))
    print -u $(( 1 + ${ret} )) "usage: ${0} [-h] <URL> …"
    return ${ret}
fi
local -a urls=(${@})

for url in ${urls}; do
    local domain=${${url%/*}##*/}
    local server=${domain}
    [[ ${#o_server} -eq 2 ]] && server=${o_server[2]}
    local id=${url##*/}
    print '\e[1;95m→\e[0m' \
          "https://${server}/_matrix/media/r0/download/${domain}/${id}"
done