53 lines
1.4 KiB
JavaScript
53 lines
1.4 KiB
JavaScript
|
export default function(dispose = function() {}, max, objects = []) {
|
||
|
|
return {
|
||
|
|
acquire: function(obj, id) {
|
||
|
|
// TODO: what should happen if an ID already exists
|
||
|
|
// should we ignore and release both? Or prevent from acquiring? Or generate a unique ID?
|
||
|
|
// what happens if we can't get an id via getId or .id?
|
||
|
|
// could potentially use Set
|
||
|
|
objects.push(obj);
|
||
|
|
if (typeof max !== 'undefined') {
|
||
|
|
if (objects.length > max) {
|
||
|
|
return dispose(objects.shift());
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return id;
|
||
|
|
},
|
||
|
|
// release releases the obj from the pool but **doesn't** dispose it
|
||
|
|
release: function(obj) {
|
||
|
|
let index = -1;
|
||
|
|
let id;
|
||
|
|
if (typeof obj === 'string') {
|
||
|
|
id = obj;
|
||
|
|
} else {
|
||
|
|
id = obj.id;
|
||
|
|
}
|
||
|
|
objects.forEach(function(item, i) {
|
||
|
|
let itemId;
|
||
|
|
if (typeof item.getId === 'function') {
|
||
|
|
itemId = item.getId();
|
||
|
|
} else {
|
||
|
|
itemId = item.id;
|
||
|
|
}
|
||
|
|
if (itemId === id) {
|
||
|
|
index = i;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
if (index !== -1) {
|
||
|
|
return objects.splice(index, 1)[0];
|
||
|
|
}
|
||
|
|
},
|
||
|
|
purge: function() {
|
||
|
|
let obj;
|
||
|
|
const objs = [];
|
||
|
|
while ((obj = objects.shift())) {
|
||
|
|
objs.push(dispose(obj));
|
||
|
|
}
|
||
|
|
return objs;
|
||
|
|
},
|
||
|
|
dispose: function(id) {
|
||
|
|
return dispose(this.release(id));
|
||
|
|
},
|
||
|
|
};
|
||
|
|
}
|