#!/usr/bin/env bash

__rvm_add_user_to_group()
{
  case "${_system_type}" in
    "OpenBSD")
      __rvm_try_sudo usermod -G "$1" "$2"
      ;;
    "FreeBSD"|"DragonFly")
      __rvm_try_sudo pw usermod "$2" -G "$1"
      ;;
    "Linux")
      if [[ -f "/etc/SuSE-release" ]] ; then
        __rvm_try_sudo groupmod -A "$2" "$1"
      else
        __rvm_try_sudo /usr/sbin/usermod -a -G "$1" "$2"
      fi
    ;;
    "Darwin")
      __rvm_try_sudo dscl . -append "/Groups/$1" GroupMembership "$2"
      ;;
    "SunOS")
      groups="$(id -G "$2") \"$1\""
      __rvm_try_sudo usermod -G "${1// /, }" "$2"
      ;;
  esac
}

__rvm_show_user_groups()
{
  groups "$1" | __rvm_sed -e 's/.*:[[:space:]]*//' | \command \tr ' ' $'\n'
}

__rvm_is_user_in_group()
{
  __rvm_show_user_groups "$2" | __rvm_grep "^$1$" >/dev/null
}

__rvm_list_all_users()
{
  case "${_system_type}" in
    "Darwin")
      dscl . -search /Users PrimaryGroupID 20 | __rvm_grep PrimaryGroupID | cut -f 1
      ;;
    *)
      __rvm_grep -xF -f <(\command \cat /etc/passwd | cut -d: -f1) <(__rvm_find /home -mindepth 1 -maxdepth 1 -type d | cut -d '/' -f 3)
      ;;
  esac
}

__rvm_group_exists()
{
  case "${_system_type}" in
    (Darwin)
      dscl . -read "/Groups/$1" 1>/dev/null 2>&1 || return $?
      ;;
    (*)
      __rvm_grep "^$1:" /etc/group >/dev/null 2>&1
      ;;
  esac
}

__rvm_create_group()
{
  \typeset -a __group_params
  __group_params=()

  if [[ -n "${2:-}" ]]
  then __group_params+=( -g "$2" )
  fi

  case "${_system_type}" in
    (Linux|SunOS)
      __rvm_try_sudo groupadd "${__group_params[@]}" "$1"
      ;;
    (BSD)
      case "${_system_name}" in
        (OpenBSD)
          __rvm_try_sudo groupadd "${__group_params[@]}" "$1"
          ;;
        (FreeBSD|DragonFly)
          __rvm_try_sudo pw groupadd "${__group_params[@]}" "$1" -q
          ;;
        esac
        ;;
    (Darwin)
      \typeset _new_group_id
      if
        [[ -n "${2:-}" ]]
      then
        _new_group_id="$2"
      else
        _new_group_id="501" #only gids > 500 show up in user preferences
        #Find an open gid
        while true
        do
          name=$(dscl . search /groups PrimaryGroupID ${_new_group_id} | cut -f1 -s)
          if [[ -z "$name" ]]
          then break
          fi
          _new_group_id=$(( _new_group_id + 1 ))
        done
      fi
      # Create the group, isn't OSX "fun"?! :)
      # Thanks for the assist frogor of ##osx-server on freenode! Appreciate the assist!
      __rvm_try_sudo dscl . -create "/Groups/$1" gid "${_new_group_id}"
      ;;
  esac
}