Defold Firebase Analytics documentation

local function firebase_analytics_callback(self, message_id, message)
    if message_id == firebase.analytics.MSG_ERROR then
        -- an error was detected when performing an analytics config operation
        print("Firebase Analytics Config error: ", message.error)
        return
    end

    if message_id == firebase.analytics.MSG_INSTANCE_ID then
        -- result of the firebase.analytics.get_id() call
        print("Firebase Analytics Config instance_id: ", message.instance_id)
        return
    end
end

function init(self)
    -- use firebase only if it is supported on the current platform
    if not firebase then
        return
    end

    -- initialise firebase and check that it was successful
    firebase.set_callback(function(self, message_id, message)
        if message_id == firebase.MSG_INITIALIZED then
            firebase.analytics.set_callback(firebase_analytics_callback)
            firebase.analytics.initialize()

            -- log data
            firebase.analytics.log_string("choose_character", "character", "storm trooper")
            firebase.analytics.log_int("kills", "kills", 152)
            firebase.analytics.log("tutorial_done")
            firebase.analytics.log_number("game_speed", "speed", 1.15)
            local t = {
                number = math.random(1,100),
                boolean = true,
                string = "some_string"
            }
            firebase.analytics.log_table("stats", t)
            firebase.analytics.get_id()
        end
    end)
    firebase.initialize()
end