#!/usr/bin/env sh
# remote file access (http file-sharing shenanigans)
# compat: +ash +bash +dash +zsh

__ea_curl() {
    curl -q --no-progress-meter 127.255.255.255 >/dev/null 2>&1
    if [ $? = 2 ]
    then __ea_curl() { curl -sS "$@"; }
    else __ea_curl() { curl --no-progress-meter "$@"; }
    fi
    __ea_curl "$@"
}

__ea_urlencode() {
    while test "$1"; do
        case "$1" in
        ([a-zA-Z0-9~_.-]*) printf '%.1s' "$1";; # RFC 3986
        (*) printf '%%%02X' "'$1";; # bash complains but works
        esac
        set -- "${1#?}"
    done
} 2>&- # send bash's complaints to the abyss

__ea() { ### @ ea - **TODO:** document.
    unset LC_ALL cmd dst src trg
    export LC_ALL=C
    cmd="${1:?missing subcommand}"; shift
    case "$cmd" in
    (head)
        trg="$(__ea_urlencode "$EA_DIR/${1:?missing target}")"
        __ea_curl -I "$EA_DOMAIN/$trg"
        return;;

    (get)
        trg="$(__ea_urlencode "$EA_DIR/${1:?missing target}")"
        __ea_curl -f -R "$EA_DOMAIN/$trg" -o "${2:-$1}"
        return;;

    (put)
        src="${1:?missing source}"
        dst="$EA_DOMAIN/$EA_AUTH/"
        __ea_curl -g -n -T "$src" "$dst"
        return;;

    (puts)
        for src; do
            dst="$EA_DOMAIN/$EA_AUTH/"
            minisign -QSm "$src" || return
            __ea_curl -g -n -T "$src" "$dst" || return
            __ea_curl -g -n -T "$src.minisig" "$dst" || return
            rm "$src.minisig"
        done
        return;;

    (move)
        src="$EA_DOMAIN/$EA_AUTH/${1:?missing source}"
        dst="$EA_DOMAIN/$EA_DIR/${2:?missing destination}"
        __ea_curl -n -X MOVE -H "Destination: $dst" "$src"
        return;;

    (copy)
        src="$EA_DOMAIN/$EA_AUTH/${1:?missing source}"
        dst="$EA_DOMAIN/$EA_DIR/${2:?missing destination}"
        __ea_curl -n -X COPY -H "Destination: $dst" "$src"
        return;;

    (delete)
        trg="$EA_DOMAIN/$EA_AUTH/${1:?missing target}"
        __ea_curl -f -n -X DELETE "$trg"
        return;;

    (*)
        printf 'unknown subcommand: %s\n' "$cmd" >&2
        return 2;;
    esac
}

ea()(__ea "$@")
[ -n "${preload+-}" ] || __ea "$@"