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import { Key, KeyMap, PlayerInput } from "../types.js"
let pressed = {}
const updateRecent = (keymap: KeyMap) => {
let max = -1
let key = undefined
for (let code in pressed) {
let weight = pressed[code]
if (weight < max) continue
max = weight
key = keymap[code]
}
return key
}
export const startInputListener = (keymap: KeyMap): () => PlayerInput => {
let key: Key = Key.NOTHING;
let start = false;
document.getElementById("start").onclick = function() {
start = true
}
window.addEventListener("keydown", ev => {
if(ev.repeat) {
return;
}
if(!(ev.code in keymap)) {
return;
}
pressed[ev.code] = Object.keys(pressed).length
key = updateRecent(keymap)
});
window.addEventListener("keyup", ev => {
if (ev.repeat) {
return;
}
if (!(ev.code in keymap)) {
return
}
delete pressed[ev.code]
key = updateRecent(keymap)
})
let last = {
key: Key.NOTHING,
}
return (): PlayerInput => {
if(key === last.key && !start) {
return;
}
last = {
key,
};
let s = start;
start = false;
return {
key,
start: s,
}
}
}
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