behaviortree/lib/BehaviorTree.js

A JavaScript implementation of Behavior Trees. They are useful for implementing AIs. For Browsers and NodeJS.

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.registryLookUp = exports.getRegistry = void 0;
const helper_1 = require("./helper");
const Task_1 = __importDefault(require("./Task"));
let registry = {};
function getRegistry() {
    return registry;
}
exports.getRegistry = getRegistry;
function registryLookUp(node) {
    if (typeof node === 'string') {
        const lookedUpNode = registry[node];
        if (!lookedUpNode) {
            throw new Error(`No node with name ${node} registered.`);
        }
        return lookedUpNode;
    }
    return node;
}
exports.registryLookUp = registryLookUp;
class BehaviorTree {
    constructor({ tree, blackboard }) {
        this.tree = tree;
        this.blackboard = blackboard;
        this.lastResult = undefined;
    }
    step({ introspector } = {}) {
        const lastRun = this.lastResult && typeof this.lastResult === 'object' ? this.lastResult : undefined;
        const rerun = (0, helper_1.isRunning)(this.lastResult);
        if (introspector) {
            introspector.start(this);
        }
        this.lastResult = registryLookUp(this.tree).run(this.blackboard, {
            lastRun,
            introspector,
            rerun,
            registryLookUp
        });
        if (introspector) {
            introspector.end();
        }
    }
    static register(name, node) {
        registry[name] = typeof node === 'function' ? new Task_1.default({ name, run: node }) : node;
    }
    static cleanRegistry() {
        registry = {};
    }
}
exports.default = BehaviorTree;