113 lines
2.4 KiB
JavaScript
113 lines
2.4 KiB
JavaScript
import * as I from 'immutable';
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import {compose} from '@avocado/core';
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import {StateProperty, Trait} from '@avocado/entity';
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const decorate = compose(
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StateProperty('informSize'),
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);
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class InformedBase extends Trait {
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static defaultState() {
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return {
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informSize: [640, 360],
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};
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}
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initialize() {
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this._sentSelf = false;
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this._socket = undefined;
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this.lastNearby = I.Set();
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}
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destroy() {
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if (this._socket) {
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delete this._socket.entity;
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delete this._socket;
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}
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}
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reduceStateDiffForEntityList(diff, position) {
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// Only if entity list exists.
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if (!diff.entityList) {
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return diff;
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}
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// Reduce the entity list.
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const informSize = this.entity.informSize.toJS();
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const nearbyEntities = this.entity.nearbyEntities(informSize, position);
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const reducedEntityList = {};
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let nearby = I.Set();
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for (const entity of nearbyEntities) {
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nearby = nearby.add(entity);
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const uuid = entity.instanceUuid;
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if (this.lastNearby.has(entity)) {
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// Keep diff.
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if (diff.entityList[uuid]) {
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reducedEntityList[uuid] = diff.entityList[uuid];
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}
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}
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else {
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// Added.
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reducedEntityList[uuid] = entity.state().toJS();
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}
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}
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for (const entity of this.lastNearby.values()) {
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const uuid = entity.instanceUuid;
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if (!nearby.has(entity)) {
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// Removed.
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reducedEntityList[uuid] = false;
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}
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}
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// Track who's nearby.
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this.lastNearby = nearby;
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// Merge the reduction.
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diff = {
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...diff,
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entityList: reducedEntityList,
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};
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// Remove dead update.
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if (0 === Object.keys(diff.entityList).length) {
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delete diff.entityList;
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}
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return diff;
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}
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get socket() {
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return this._socket;
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}
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set socket(socket) {
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socket.entity = this.entity;
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this._socket = socket;
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}
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methods() {
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return {
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inform: (diff) => {
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// Remove dead updates.
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if (0 === Object.keys(diff).length) {
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return;
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}
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if (!this._sentSelf) {
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diff.selfEntity = this.entity.instanceUuid;
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this._sentSelf = true;
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}
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this._socket.send({
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type: 'state-update',
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payload: diff,
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});
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},
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reduceStateDiff: (diff, position) => {
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return this.reduceStateDiffForEntityList(diff, position);
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},
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};
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}
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}
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export class Informed extends decorate(InformedBase) {}
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