@bitblit/ratchet-epsilon-common/lib/util/aws-util.js

Tiny adapter to simplify building API gateway Lambda APIS

export class AwsUtil {
    static apiGatewayV2ToApiGatewayV1(srcEvt) {
        const rval = {
            requestContext: AwsUtil.apiGatewayV2RequestContextToApiGatewayV1RequestContext(srcEvt.requestContext),
            httpMethod: srcEvt.requestContext.http.method,
            path: srcEvt.requestContext.http.path,
            queryStringParameters: srcEvt.queryStringParameters,
            headers: srcEvt.headers,
            body: srcEvt.body,
            isBase64Encoded: srcEvt.isBase64Encoded,
            multiValueHeaders: null,
            multiValueQueryStringParameters: null,
            pathParameters: srcEvt.pathParameters,
            stageVariables: srcEvt.stageVariables,
            resource: null,
        };
        return rval;
    }
    static apiGatewayV2RequestContextToApiGatewayV1RequestContext(srcEvt) {
        const rval = {
            accountId: srcEvt.accountId,
            apiId: srcEvt.apiId,
            authorizer: null,
            domainName: srcEvt.domainName,
            domainPrefix: srcEvt.domainPrefix,
            requestId: srcEvt.requestId,
            routeKey: srcEvt.routeKey,
            stage: srcEvt.stage,
            requestTime: srcEvt.time,
            requestTimeEpoch: srcEvt.timeEpoch,
            protocol: srcEvt.http.protocol,
            httpMethod: srcEvt.http.method,
            identity: null,
            path: srcEvt.http.path,
            resourceId: null,
            resourcePath: null,
        };
        return rval;
    }
    static findInMap(toFind, map) {
        let rval = null;
        map.forEach((val, key) => {
            if (AwsUtil.matchExact(key, toFind)) {
                rval = val;
            }
        });
        return rval;
    }
    static matchExact(r, str) {
        const match = str.match(r);
        return match != null && str == match[0];
    }
    static resolvePotentialFunctionToResult(src, def) {
        let rval = def;
        if (src) {
            if (typeof src === 'function') {
                rval = src();
            }
            else {
                rval = src;
            }
        }
        return rval;
    }
}
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