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