Set Slack status when locking screen under Linux

screen-lock-notify

# put under ~/.config/screen-lock-notify
#
# Obtain one here: https://api.slack.com/legacy/custom-integrations/legacy-tokens
#
# Beware: New tokens will only be issued until May.
#
SLACK_LEGACY_TOKEN="xoxp-..."

# Figure out the interface by issuing:
#
#     dbus-monitor --session "type='signal'"
#
# in a terminal, and then locking and unlocking your screen.
#
DBUS_INTERFACE=org.cinnamon.ScreenSaver
# DBUS_INTERFACE=org.gnome.ScreenSaver
# DBUS_INTERFACE=org.mate.ScreenSaver
# DBUS_INTERFACE=org.xfce.ScreenSaver


#
# Can be any channel or user.
#
HISTORY_CHANNEL="..."


AWAY_STATUS="away from keyboard"
AWAY_ICON=":coffee:"

PRESENT_STATUS="working from home"
PRESENT_ICON=":house_with_garden:"

screen-locked-set-status.sh

#!/bin/bash
#
# Script to set status on Slack.
#

# Load
#
# SLACK_LEGACY_TOKEN
# DBUS_INTERFACE
# HISTORY_CHANNEL
# AWAY_STATUS
# AWAY_ICON
# PRESENT_STATUS
# PRESENT_ICON
source ~/.config/screen-lock-notify


api_call() {
    curl \
        -X POST -H "Authorization: Bearer $SLACK_LEGACY_TOKEN" \
        -H 'Content-Type: application/json; charset="utf-8"' \
        --data "$2" https://slack.com/api/"$1"
    echo
}


slack_set_status() {
    local presence="$1"
    local status_text="$2"
    local status_emoji="$3"

    api_call users.setPresence "{\"presence\":\"$presence\"}"

    api_call users.profile.set \
        "{\"profile\": {\"status_text\": \"$status_text\", \"status_emoji\": \"$status_emoji\"}}"


    if [ ! -z $HISTORY_CHANNEL ]; then

        local msg
        if [ -z "$status_text" ]; then
            msg="I'm back"
        else
            msg=$status_text
        fi

        api_call chat.postMessage \
            "{\"channel\":\"$HISTORY_CHANNEL\", \"text\":\"$msg\", \"as_user\":\"true\"}"
    fi
}


screen_locked() {
    echo SCREEN_LOCKED
    slack_set_status away "$AWAY_STATUS" "$AWAY_ICON"
}


screen_unlocked() {
    echo SCREEN_UNLOCKED
    slack_set_status auto "$PRESENT_STATUS" "$PRESENT_ICON"
}



dbus-monitor --session "type='signal',interface='$DBUS_INTERFACE'" |
    while read signal; do
        case "$signal" in
            *"boolean true"*) screen_locked;;
            *"boolean false"*) screen_unlocked;;
        esac
    done