rofi-network

#!/usr/bin/env bash
#
#   Simple network manager interface to connect/disconnect from configured
#   networks.
#
#   Requirements:
#     NetworkManager, awk, rofi
#
#   Notes:
#     * "Return" will turn on/off the highlighted network.
#     * "Alt+Return" will open the highlighted network in
#       `nm-connection-editor`.
#     * "Alt+e" will open `nm-connection-editor`.
#

# Basic rofi launch command. Additional option can also be provided
# when calling this script
LAUNCHER="rofi -dmenu -markup-rows -i -p network \
    -kb-custom-1 Alt+Return -kb-custom-2 Alt+e $@"

# Separator used to separate the displayed network information
SEPARATOR=", "

# The networks to include
TYPES=('Ethernet' '802-11-wireless' 'vpn')

# Titles for the previously defined types. Have to be even in count.
TITLES=('Ethernet' 'Wi-Fi' 'VPN')


function formate() {
    echo "$(echo "$1" | awk -F ":" -v sep="$SEPARATOR" \
        '{print $1sep"<small>"$2"</small>"}')"
}

function filter() {
    networks="$1"
    type_="$2"
    echo -e "$(echo "$networks" | awk -F ":" -v t="$type_" '$3 == t')"
}

function is_active() {
    networks="$1"
    uuid="$2"
    test ! -z "$(echo "$networks" \
        | awk -F ":" -v uuid="$uuid" '$2 == uuid && $4 == "activated"')"
}

function parse_rofi_name() {
    echo "$(echo "$line" | awk -F "$SEPARATOR" '{print $1}')"
}

function parse_rofi_uuid() {
    line="$1"
    uuid="$(echo "$line" | awk -F "$SEPARATOR" '{print $2}')"
    uuid=${uuid#<small>}
    uuid=${uuid%</small>}
    echo "$uuid"
}

if [ ${#TYPES[@]} -ne ${#TITLES[@]} ]; then
    echo "'TYPES' and 'TITLES' aren't even."
    exit 1
fi

# Get a list of all connections
networks="$(nmcli -t -f "name,uuid,type,state" c show)"

# Generate a list for rofi to display
#for type_ in "${TYPES[@]}"; do
for i in ${!TYPES[@]}; do
    cons="$(filter "$networks" ${TYPES[$i]})"
    if [ -z "$cons" ]; then
        continue
    fi
    rofi_options+="<u><b>${TITLES[$i]}</b></u>\n"
    rofi_options+="$(formate "$cons")"
    rofi_options+="\n"
done

rofi_options=${rofi_options%'\n'}

# Build a index list of active networks for rofi
count=0
active_index=''
while read line; do
    uuid="$(parse_rofi_uuid "$line")"
    if $(is_active "$networks" "$uuid"); then
        active_index+="${count},"
    fi
    ((count++))
done <<< "$(echo -e "$rofi_options")"
active_index=${active_index%,}

# Prepare additional arguments for rofi
args=''
if [ ! -z "$active_index" ]; then
    args+="-a $active_index"
fi

# Show rofi
network="$(echo -e "$rofi_options" | $LAUNCHER $args)"
action=$?

if [ $action -eq 0 ]; then
    uuid="$(parse_rofi_uuid "$network")"

    if $(is_active "$networks" "$uuid"); then
        nmcli c down "$uuid"
    else
        nmcli c up "$uuid"
    fi
elif [ $action -eq 10 ]; then
    uuid="$(parse_rofi_uuid "$network")"
    nm-connection-editor -e "$uuid"
elif [ $action -eq 11 ]; then
    nm-connection-editor
fi