@autobe/agent/lib/utils/emplaceMap.js

AI backend server code generator

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.emplaceMap = emplaceMap;
/**
 * Gets existing value from Map or lazily creates it if missing.
 *
 * Implements the lazy initialization pattern: returns existing value if key
 * exists, otherwise calls generator function to create new value, stores it,
 * and returns it. Ensures generator is only called when necessary, avoiding
 * wasteful computation.
 *
 * Used throughout AutoBE for caching event listeners, validation state, and
 * other expensive-to-create objects that should be initialized on first
 * access.
 *
 * @param dict Map to query and potentially update
 * @param key Key to look up or create
 * @param generator Function to create value if key doesn't exist
 * @returns Existing or newly created value
 */
function emplaceMap(dict, key, generator) {
    const oldbie = dict.get(key);
    if (oldbie !== undefined) {
        return oldbie;
    }
    const value = generator();
    dict.set(key, value);
    return value;
}
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