import { makeText } from "./text"
export type Creator = (objIn: A) => B
export type Builder = Creator, A>
export type Extender = Creator, B>
export function makeCombined(fn1: Builder): Builder
export function makeCombined(fn1: Builder, fn2: Extender): Builder
export function makeCombined(fn1: Builder, fn2: Extender, fn3: Extender): Builder
export function makeCombined(fn1: Builder, fn2: Extender, fn3: Extender, fn4: Extender): Builder
export function makeCombined(fn1: Builder, fn2: Extender, fn3: Extender, fn4: Extender, fn5: Extender): Builder
export function makeCombined(fn1: Builder, fn2: Extender, fn3: Extender, fn4: Extender, fn5: Extender, fn6: Extender): Builder
export function makeCombined(fn1: Builder, fn2?: Extender, fn3?: Extender, fn4?: Extender, fn5?: Extender, fn6?: Extender): Builder | Builder | Builder | Builder | Builder | Builder
{
if(fn2 && fn3 && fn4 && fn5 && fn6) return makeCombined(makeCombined(fn1, fn2, fn3, fn4, fn5), fn6)
if(fn2 && fn3 && fn4 && fn5) return makeCombined(makeCombined(fn1, fn2, fn3, fn4), fn5)
if(fn2 && fn3 && fn4) return makeCombined(makeCombined(fn1, fn2, fn3), fn4)
if(fn2 && fn3) return makeCombined(makeCombined(fn1, fn2), fn3)
if(fn2) return (objIn: Partial) => fn2(>fn1(objIn))
return fn1
}
export interface HasIdentity {
id: number
}
export interface HasPosition {
position: Vector2
}
export interface HasColor {
color: Color
}
export interface HasBoundingBox {
boundingBox: Rectangle
}
export interface Behaviour {
load?: (entity: T) => void,
unload?: (entity: T) => void,
update?: (entity: T) => void,
draw?: (entity: T) => void
}
export function addBehaviour(obj: T, behaviour: Behaviour){
obj.behaviours.push(behaviour)
}
export function removeBehaviour(obj: T, behaviour: Behaviour){
const idx = obj.behaviours.findIndex(x => x === behaviour)
if(idx !== -1) obj.behaviours.splice(idx, 1)
}
export interface HasBehaviour {
behaviours: Behaviour[]
}
export type Entity = HasIdentity & HasBehaviour
export type EntityOf = Entity & T
export const setPropFn = (obj: T, key: keyof T, valueFn: () => any) => { if(obj[key] === undefined) obj[key] = valueFn() }
export const setProp = (obj: T, key: keyof T, value: any) => { if(obj[key] === undefined) obj[key] = value }
let ID = 0
export const makeIdentity = (obj: Partial) => {
setPropFn(obj, 'id', () => ID++)
return obj
}
export const makeBehaviour = (obj: Partial) => {
setPropFn(obj, 'behaviours', () => [])
return obj
}
export const makeEntity: Builder = makeCombined(makeIdentity, makeBehaviour)
export const makePosition = (obj: Partial,x = 0, y = 0) => {
setPropFn(obj, 'position', () => new Vector2(x,y))
return obj
}
export const makeColorRgb = (obj: Partial, r = 255, g = 255, b = 255, a = 255) => {
setPropFn(obj, 'color', () => new Color(r, g, b, a))
return obj
}
export const makeColor = (obj: Partial, c = WHITE) => {
setPropFn(obj, 'color', () => new Color(c.r, c.g, c.b, c.a))
return obj
}
export const makeBoundingBox = (obj: Partial, x = 0, y = 0, width = 0, height = 0) => {
setPropFn(obj, 'boundingBox', () => new Rectangle(x,y,width,height))
return obj
}
export const debugRectDrawFn = (obj: HasBoundingBox, color = GREEN) => drawRectangleLines(obj.boundingBox.x, obj.boundingBox.y, obj.boundingBox.width, obj.boundingBox.height, color)
export const debugRectDrawBehaviour = { draw: debugRectDrawFn }
export interface Clickable extends HasBoundingBox, HasBehaviour {
isClicked: boolean
hasMouseOver: boolean,
hasMouseEntered: boolean,
hasMouseLeft: boolean
debugClickable: boolean
}
export const clickableBehaviour: Behaviour = {
update: (obj: Clickable) => {
const over = checkCollisionPointRec(getMousePosition(), obj.boundingBox)
obj.hasMouseEntered = !obj.hasMouseOver && over
obj.hasMouseLeft = obj.hasMouseOver && !over
obj.hasMouseOver = over
obj.isClicked = obj.hasMouseOver && isMouseButtonPressed(MOUSE_BUTTON_LEFT)
if(obj.hasMouseEntered) setMouseCursor(MOUSE_CURSOR_POINTING_HAND)
if(obj.hasMouseLeft) setMouseCursor(MOUSE_CURSOR_DEFAULT)
},
draw: (obj: Clickable) => {
if(obj.debugClickable){
debugRectDrawFn(obj, obj.hasMouseOver ? RED : GREEN)
drawCircle(getMouseX(), getMouseY(), 10, YELLOW)
}
},
unload: obj => setMouseCursor(MOUSE_CURSOR_DEFAULT)
}
export const makeClickable: Builder = makeCombined(makeBehaviour, makeBoundingBox, (obj: HasBehaviour & HasBoundingBox & Partial) => {
setProp(obj, 'hasMouseOver', false)
setProp(obj, 'isClicked', false)
setProp(obj, 'hasMouseEntered', false)
setProp(obj, 'hasMouseLeft', false)
setProp(obj, 'debugClickable', false)
addBehaviour(obj, clickableBehaviour)
return obj
})