#!/usr/bin/env bash

function group::exists() {
  local name="$1"
  [[ -f "$(ctx::group::path "${name}.group")" ]]
}

function group::require_exists() {
  local name="$1"
  if ! group::exists "$name"; then
    log::error "Group not found: ${name}"
    return 1
  fi
}

function group::path() {
  local name="$1"
  ctx::group::path "${name}.group"
}

function group::peers() {
  local name="$1"
  json::get "$(group::path "$name")" "peers"
}

function group::add_peer() {
  local name="$1" peer="$2"
  json::append "$(group::path "$name")" "peers" "$peer"
}

function group::remove_peer() {
  local name="$1" peer="$2"
  json::remove "$(group::path "$name")" "peers" "$peer"
}

function group::all() {
  local dir
  dir="$(ctx::groups)"
  for f in "${dir}"/*.group; do
    [[ -f "$f" ]] || continue
    basename "$f" .group
  done
}

function group::peer_groups() {
  local peer_name="$1"
  # Returns all groups that contain this peer
  while IFS= read -r group_name; do
    if group::peers "$group_name" | grep -qF "$peer_name"; then
      echo "$group_name"
    fi
  done < <(group::all)
}