hammerspoon.lua

-- Layout Switch
ctrlPressed = false
keyPressed = false

eventTypes = hs.eventtap.event.types
events = { eventTypes.flagsChanged, eventTypes.keyUp }

function indexOf(table, value)
    local index = -1
    for i = 1, #table do
        if value == table[i] then
            return index
        end
    end
end

layouts = hs.keycodes.layouts()
layout = hs.keycodes.currentLayout()
current_index = indexOf(layouts, layout)
right_command_key = 0x36

layoutWatcher = hs.eventtap.new(events, function(e)
    local flags = e:getFlags()
    local keyCode = e:getKeyCode()
    if flags.cmd and keyCode == right_command_key and not (flags.alt or flags.shift or flags.ctrl or flags.fn) then
        ctrlPressed = true
        keyPressed = false
    elseif ctrlPressed and not (flags.cmd or flags.alt or flags.shift or flags.ctrl or flags.fn) and not keyPressed then
        ctrlPressed = false
        if keyCode == right_command_key then
            current_index = (current_index % #layouts) + 1
            hs.keycodes.setLayout(layouts[current_index])
        end
    else
        keyPressed = true
    end
end)
layoutWatcher:start()

-- Periodic Things

hs.timer.doAt("00:00", "1h", function()
    hs.application.launchOrFocus("Things3")
end):start()