actions-on-google/dist/framework/lambda.js

"use strict";
/**
 * Copyright 2018 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.lambda = exports.Lambda = void 0;
const common = require("../common");
/** @hidden */
class Lambda {
    handle(standard) {
        return async (event, context, callback) => {
            const metadata = {
                context,
                event,
            };
            const entireBodyFormat = typeof event.headers !== 'object' || Array.isArray(event.headers);
            // convert header keys to lowercase for case insensitive header retrieval
            const headers = entireBodyFormat
                ? {}
                : Object.keys(event.headers).reduce((o, k) => {
                    o[k.toLowerCase()] = event.headers[k];
                    return o;
                }, {});
            const body = entireBodyFormat
                ? event
                : typeof event.body === 'string'
                    ? JSON.parse(event.body)
                    : event.body;
            const result = await standard(body, headers, { lambda: metadata }).catch((e) => {
                common.error(e.stack || e);
                callback(e);
            });
            if (!result) {
                return;
            }
            const { status } = result;
            callback(null, {
                statusCode: status,
                body: JSON.stringify(result.body),
                headers: result.headers,
            });
        };
    }
    isContext(second) {
        return typeof second.succeed === 'function';
    }
    isCallback(third) {
        return typeof third === 'function';
    }
    check(first, second, third) {
        return this.isContext(second) && this.isCallback(third);
    }
}
exports.Lambda = Lambda;
/** @hidden */
exports.lambda = new Lambda();
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