text: import handler from "./libs/handler-lib";
  import dynamoDb from "./libs/dynamodb-lib";
  
  export const main = handler(async (event, context) => {
      const data = JSON.parse(event.body);
      const params = {
          TableName: process.env.tableName,
          //'Key' defines the partition key and sort key of the item to be updated
          Key: {
              userid: event.requestContext.identity.cognitoIdentityId, //The id of the author
              noteid: event.pathParameters.id, //The id of the note of the author
          },
          //'UpdateExpression' defines the attributes to be updated
          //'ExpressionAttributeValues' defines the values in the updated expression
          UpdateExpression: "SET content = :content, attachment = :attachment",
          ExpressionAttributeValues: {
              ":attachment": data.attachment || null,
              ":content": data.content || null,
          },
          // 'ReturnValues' specifies if and how to return the item's attributes,
          // where ALL_NEW returns all attributes of the item after the update;
          // you can inspect 'result' below to see how it works with different settings
          ReturnValues: "ALL_NEW",
      };
  
      await dynamoDb.update(params);
  
      return { status: true };
  });