@goldstack/utils-aws-lambda/dist/src/generate/generateFunctionName.js

Utilities for deploying AWS Lambda functions

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.generateFunctionName = void 0;
const crypto_1 = __importDefault(require("crypto"));
const INDEX_MARKER = '__index';
const DEFAULT_MARKER = '__default';
const sanitiseFunctionName = (input) => input
    .replace(/\//g, '-')
    .replace(/\$/g, '_')
    .replace(/\{/g, '_')
    .replace(/\}/g, '_')
    .replace(/\+/g, '_')
    .replace(/[^\w\-_]/gi, '_');
/**
 * Generates a valid function name for a route
 */
const generateFunctionName = (prefix, config) => {
    let name = config.name;
    if (name === '$default') {
        name = DEFAULT_MARKER;
    }
    if (name === '$index') {
        name = INDEX_MARKER;
    }
    name = sanitiseFunctionName(name);
    const segments = config.path.split('/').filter(Boolean); // remove empty segment from start
    let pathPrefix = '';
    if (segments.length > 1) {
        pathPrefix = sanitiseFunctionName(segments.join('-'));
    }
    else if (segments.length === 1 && name === INDEX_MARKER) {
        // e.g. /health/$index.ts → ['health']
        pathPrefix = sanitiseFunctionName(segments[0]);
    }
    if (pathPrefix && name === INDEX_MARKER) {
        pathPrefix += '-index';
    }
    let fullName = [prefix, pathPrefix, name].filter(Boolean).join('-');
    fullName = sanitiseFunctionName(fullName);
    // Lambda function name limit
    if (fullName.length > 64) {
        fullName = `${fullName.substring(0, 40)}-${crypto_1.default
            .createHash('md5')
            .update(fullName)
            .digest('hex')
            .substring(0, 20)}`;
    }
    return fullName;
};
exports.generateFunctionName = generateFunctionName;
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