@argodigital/qq-shared/dist/wrapper/apiwrapper.js

Shared code for QQ projects

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var logger_1 = require("../logger");
var iopipe_1 = require("@iopipe/iopipe");
var ioPipeEnabled = 'true' !== process.env.DISABLE_IOPIPE;
var headers = {
    'Access-Control-Allow-Origin': '*',
    'Access-Control-Allow-Credentials': true
};
function apiwrapper(fn) {
    return function (event, context, callback) {
        var log = logger_1.logger(context);
        var body;
        try {
            body = event.body ? JSON.parse(event.body) : null;
        }
        catch (err) {
            body = null;
            log.error('Error parsing body with request', event.body, err);
            error(err);
        }
        var path = event.pathParameters ? event.pathParameters : null;
        var query = event.queryStringParameters ? event.queryStringParameters : null;
        var request = body ? body : path ? path : query ? query : null;
        var authContext = event.requestContext && event.requestContext.authorizer ? event.requestContext.authorizer : null;
        if (ioPipeEnabled) {
            iopipe_1.metric('region', process.env.AWS_REGION);
            iopipe_1.metric('revision', process.env.REVISION);
            iopipe_1.metric('stage', process.env.STAGE);
            iopipe_1.metric('body', body);
            iopipe_1.metric('query-params', query);
            iopipe_1.metric('path-params', path);
            iopipe_1.metric('auth-context', authContext);
        }
        function success(message) {
            if (ioPipeEnabled) {
                iopipe_1.label('valid');
            }
            var body = JSON.stringify(message);
            log.info("Successful request. Returning " + body);
            return callback(null, { statusCode: 200, headers: headers, body: body });
        }
        function invalid(errors) {
            var validationErrors = getValidationMessages(errors);
            log.info('Invalid request', validationErrors, request);
            if (ioPipeEnabled) {
                iopipe_1.label('invalid');
                iopipe_1.metric('invalid', validationErrors);
            }
            var body = JSON.stringify({ request: request, validationErrors: validationErrors });
            return callback(null, { statusCode: 400, headers: headers, body: body });
        }
        function redirect(url) {
            if (ioPipeEnabled) {
                iopipe_1.label('redirect');
                iopipe_1.metric('redirect', url);
            }
            headers['Location'] = url;
            return callback(null, { statusCode: 302, headers: headers });
        }
        function error(error, statusCode) {
            statusCode = statusCode || error && error.statusCode || 500;
            if (500 === statusCode) {
                log.error('Error', error, request);
            }
            error = error instanceof Error ? error.toString() : error;
            if (ioPipeEnabled) {
                iopipe_1.label('error');
                iopipe_1.metric('error', error);
            }
            var body = JSON.stringify({ request: request, error: error });
            return callback(undefined, { statusCode: statusCode, headers: headers, body: body });
        }
        var props = { event: event, body: body, query: query, path: path, success: success, invalid: invalid, error: error, redirect: redirect, log: log, authContext: authContext };
        fn(props);
    };
}
exports.apiwrapper = apiwrapper;
function getValidationMessages(errors) {
    var messages = [];
    if (errors.errors) {
        messages = errors.errors;
    }
    else {
        errors = errors;
        errors.forEach(function (error) {
            if (error.constraints) {
                var constraint_1 = error.constraints;
                messages = messages.concat(Object.keys(constraint_1).map(function (key) { return constraint_1[key]; }));
            }
            if (error.children) {
                messages = messages.concat(getValidationMessages(error.children));
            }
        });
    }
    return messages;
}