wlctl

#!/bin/sh


ACTION=$1
NAME_PATTERN=$2


function help {
  cat << EOM
wlctl - a simple wrapper for connmanctl to enable/disable Wi-Fi,
        and to connect to / disconnect from a Wi-Fi network

Written by Giorgi Gzirishvili <drn+contact.tools.asteroidos.wlctl@disroot.org>
This code is licensed under the MIT License.

USAGE
  wlctl ACTION [NAME_PATTERN]

  Actions:
    enable                      Enable Wi-Fi.
    disable                     Disable Wi-Fi.
    connect [NAME_PATTERN]      Connect to a Wi-Fi network. You can specify a
                                unique name pattern in order to connect to a
                                specific network.
    disconnect [NAME_PATTERN]   Disonnect from a Wi-Fi network. You can specify
                                a unique name pattern in order to disconnect
                                from a specific network.
    status                      Get connection and hardware status.
    help                        Get this help.

EOM
}


# === BEGIN Utils ===
function blank_line {
  echo ''
}

function scan_networks {
  echo 'Scanning...'
  connmanctl scan wifi >/dev/null
  blank_line
}

function list_networks {
  echo 'Available networks:'
  connmanctl services
  blank_line
}

function select_network {
  if [ -z $NAME_PATTERN ]; then
    echo -ne "Enter network name or regex pattern to match:\n> "
    read NAME_PATTERN
    blank_line
  fi

  SELECTED_NETWORK=$(connmanctl services | grep -i "$NAME_PATTERN" | \
                     head -n 1 | grep -io 'wifi_[^ ]*')
}
# ==== END Utils ====


function wifi_state {
  connmanctl $1 wifi
  blank_line
}

function network_action {
  wifi_state enable 1>/dev/null 2>/dev/null
  sleep 0.25
  scan_networks
  list_networks
  select_network
  connmanctl $1 $SELECTED_NETWORK
  blank_line
}

function status {
  echo 'Connection:'
  connmanctl state
  blank_line

  WIFI_STATUS=$(connmanctl technologies | grep -A 6 'technology/wifi' | \
                tail -n 4)

  echo 'Wi-Fi:'
  echo "$WIFI_STATUS"
  blank_line

  if [ -n "$(echo -e "$WIFI_STATUS" | grep Powered | grep True)" ]; then
    scan_networks
    list_networks
  fi
}

case $ACTION in
  enable) wifi_state enable ;;
  disable) wifi_state disable ;;
  connect) network_action connect ;;
  disconnect) network_action disconnect ;;
  status) status ;;
  help) help ;;
  '') echo "No action specified. Run \`wlctl help\` for usage information." ;;
  *) echo "Invalid action: '$ACTION'. Run \`wlctl help\` for usage information." ;;
esac