#! /bin/bash
# (Using bash or zsh for the <() process substitution feature...)
#
# Sample script using madonctl (0.4+), use --help for usage.
# This script uses the 'combine' utility (from the moreutils package in
# Debian).
#
# MiKael, 2017-04

set -e

usage() {
    echo "Usage: $0 following_only|followers_only|both"
}

# Check madonctl is in the PATH
command -v madonctl >/dev/null 2>&1 || {
    echo "Error: madonctl not found">&2
    exit 1
}
# Check combine command (from the moreutils package)
command -v combine >/dev/null 2>&1  || {
    echo "Error: combine not found">&2
    exit 1
}

# Get our account ID (not needed anymore as of 0.4.0)
# me="$(madonctl account show --template '{{.id}}')"

# $1 = following/followers
getAccountFollow() {
    TEMPL='{{.id}}{{"\n"}}'
    madonctl accounts --all "$1" --template "$TEMPL"
}

displayAccount() {
    id=$1
    madonctl account show --account-id "$id" \
        --template '{{printf "%s\t%s\n" .acct .display_name}}'
}

combineOutput() {
    case $1 in
        (both)
            combine <(getAccountFollow following) and <(getAccountFollow followers)
            ;;
        (following_only)
            combine <(getAccountFollow following) not <(getAccountFollow followers)
            ;;
        (followers_only)
            combine <(getAccountFollow followers) not <(getAccountFollow following)
            ;;
    esac
}

case $1 in
    (both|following_only|followers_only)
        combineOutput "$1" | while read acccountID; do
            displayAccount "$acccountID"
        done
        ;;
    (help|--help|-h)
        usage
        ;;
    (*)
        usage>&2
        exit 1
esac