Hooks

Hooks are functions to call after some events happens. Defined with cr.hook() function.

Usage:

cr.hook("<event>", function(args...)

    -- some action

end)

Events

No return and no argument events

These events does not take any argument and does not return a value.

• start: Runned before everything and main menu.
• reload: Runned when plugins are reloaded.
• always: Always runned before UI refresh.
• end: Runned when game ends.
• die: Runned when player dies.
• draw: Runned after cr.draw_cards().
• level_gen: Runned after cr.generate_levels()

Has a return type or argument

These events takes arguments in varius types and may return a bool value.

key

Runned when a key pressed on main game loop.

No return type. Takes an integer argument: the key pressed.

Handle the key with string.char() and string.byte() functions, and cr.curses.KEY_ variables.

level_up

Runned when exit gate found.

No return type. Takes an integer argument: current level index.

slot

Runned when a slot picked.

Has bool return type: if true, slot will be skipped for now. Takes an integer argument: slots number (1, 2, 3)

item

Runned when user wants to use an item.

Has bool return type: if true, using item is canceled. Takes an shared card argument: the item used.

card_event

Runned when cr.basic_card_event called.

Has bool return type: if true, card event is canceled. Takes following arguments:

• Shared card : the card
• integer : extra damage value

Examples

-- show a log
cr.hook("start", function()
    cr.log("This log is added before everything")
end)

-- handle keyboard
cr.hook("key", function(key)
    if key == 27 then
        cr.log("pressed ESC")
    elseif key == cr.curses.BACKSPACE then
        cr.log("pressed backspace")
    elseif key == string.byte("a") then
        cr.log("pressed a")
    end
end)

-- disable cr.stat.slot1
cr.hook("slot", function(slot_id)
    if slot_id == 3 then
        return true
    end

    return false
end)