buildFactResponse.js

function buildFactResponse(myName, myQuestion) {
    return new Promise((resolve, reject) => {
        if (myQuestion !== undefined) {
            let params = {};
            params.TableName = "AzureFacts";
            params.Key = {"Fact": myQuestion};
            params.UpdateExpression = "set Hits = Hits + :val";
            params.ExpressionAttributeValues = {":val": 1};
            params.ReturnValues = "ALL_NEW";

            docClient.update(params, function (err, data) {
                if (err) {
                    console.log("GetItem threw an error:", JSON.stringify(err, null, 2));
                    reject(err);
                } else {
                    console.log("GetItem succeeded:", JSON.stringify(data, null, 2));
                    resolve(data);
                }
            });
        }
    });
}