Level switching logic

input.lua

@@ -0,0 +1,95 @@
+-- Input system
+-- TODO: replace this with universal system
+local Input = {
+    keyboardButtons = { 'escape', 'space' },
+    keyboardPressed = {},
+    lastKeyboardPressed = {},
+    actions = {}
+}
+
+local function mapAction( input, action, keys )
+    input.actions[action] = {}
+    for _, key in pairs( keys ) do
+        table.insert( input.actions[action], key )
+    end
+end
+
+local function loadMap( input )
+    mapAction( input, 'exit', { 'escape' } )
+    mapAction( input, 'nextlevel', { 'space' } )
+end
+
+local function predHolded( pressed, _ )
+    return pressed
+end
+
+local function predPressed( pressed, lastPressed )
+    return pressed and not lastPressed
+end
+
+local function predReleased( pressed, lastPressed )
+    return not pressed and lastPressed
+end
+
+local function testAction( input, action, predicate )
+    for _, key in ipairs( input.actions[action] ) do
+        local pressed, lastPressed
+
+        pressed = input.keyboardPressed
+        lastPressed = input.lastKeyboardPressed
+
+        if predicate( pressed[key], lastPressed[key] ) then
+            return true
+        end
+    end
+
+    return false
+end
+
+function Input.init()
+    for btn in ipairs( Input.keyboardButtons ) do
+        Input.keyboardPressed[Input.keyboardButtons[btn]] = false
+        Input.lastKeyboardPressed[Input.keyboardButtons[btn]] = false
+    end
+
+    loadMap( Input )
+
+    return Input
+end
+
+function Input:update()
+    for k, _ in pairs( self.keyboardPressed ) do
+            self.lastKeyboardPressed[k] = self.keyboardPressed[k]
+    end
+
+    for button in ipairs( self.keyboardButtons ) do
+            self.keyboardPressed[self.keyboardButtons[button]] = love.keyboard.isDown( self.keyboardButtons[button] )
+    end
+end
+
+function Input:actionHolded( action )
+    return testAction( self, action, predHolded )
+end
+
+function Input:actionReleased( action )
+    return testAction( self, action, predReleased )
+end
+
+function Input:actionPressed( action )
+    return testAction( self, action, predPressed )
+end
+
+function Input:actionDiff( negative, positive )
+    local negResult = testAction( self, negative, predHolded )
+    local posResult = testAction( self, positive, predHolded )
+
+    if negResult and not posResult then
+        return -1
+    elseif posResult and not negResult then
+        return 1
+    else
+        return 0
+    end
+end
+
+return Input.init()