Architectural design and photo gallery implementation notes

winter presentation notes.md

Architectural design (2 min)

• Architecture diagram
• All services are up and running
• Google services were added: Google Maps Embed API and Google Identity Services
  • Embeded Google Map on vendor page
  • Sign-in with Google feature

Photo gallery implementation (4 min)

Creating a review and photo

• Review-photo diagram

1. The server creates temporary credentials for S3 with write permissions and forwards them to the client

// In the server
params := &sts.AssumeRoleInput{
  RoleArn:         aws.String("arn:aws:iam::00000000:role/SFLPhotoUpload"),
  RoleSessionName: aws.String("streetfoodlove"),
  DurationSeconds: aws.Int32(900),
}

response, err := a.client.AssumeRole(ctx, params)

2. The client uses the temporary credentials to create a S3 object from the image file

const photoID = uuid(); // Generate a random ID
await uploadToS3(s3Credentials, photoID, file);

3. Review is created

const review = {
  ID: uuid(),
  Text: text,
  DatePosted: DateTime.now(),
  VendorID: vendorID,
  UserID: userID,
  StarRating: starRating,
  ReplyTo: null,
  VendorFavorite: false,
};
await submitReview(review);

4. Photo is created

const photo: Photo = {
  ID: photoID,                // Photo ID is the same as the S3 object name
  DatePosted: DateTime.now(),
  LinkID: review.ID,          // LinkID references the review
};
await createPhoto(photo);

Retrieving a review and its photo

1. Get the Review

SELECT * FROM Review WHERE ID=?

3. Get the Photos associated with the review. Review and photo is a one-to-many relationship

SELECT * FROM Photo WHERE ReviewID=?

4. Get the image file associated with the photo, using the photo ID

<img src="https://bucket.s3.us-west-2.amazonaws.com/<Photo ID>" />