Complaza Backend Stack

Backend Resources

Lambda functions

• LF0: Call ML endpoint to return product names
• LF1: Call 3rd party APIs to fullfil search and save to user's search history
• LF2: Interaction with the wishlist table
• LF3: Return search history
• LF4: Get price and update price history
• LF5: Get product details and price history

Databases

Table Name	Hash Key	Range Key	Other Fields
SearchHistoryTable	uid	datetime	imgKey, q
ProductTable	id	created	image, link, name, price, retailer
WishlistTable	uid	pid	created
PriceHistoryTable	pid	date	price

API gateway

Endpoint	Description	Lambda Fn	Auth
GET /image/{key}	get the keyword associated with the image by key in S3	LF0	No
GET /product/{pid}	get the product detail and price history by pid	LF5	No
GET /search?{q, image, sort_by, uid}	search by provided keyword q, add to search history if uid exists	LF1	Depends
GET /history/{uid}	gets all the search history of a user by uid	LF3	Yes
GET /search/history/{uid}?q={q}	search in the search history of a user by uid matching q	LF3	Yes
GET /wishlist/{uid}	gets all products from a user's wishlist by uid	LF2	Yes
GET /search/wishlist/{uid}?q={q}	search in the wishlist of a user by uid matching q	LF2	Yes
POST /wishlist/{uid}	adds a product to a user's wishlist	LF2	Yes
DELETE /wishlist/{uid}/{pid}	delete a product from a user's wishlist	LF2	Yes

CodePipeline (CI/CD)

code-pipeline-template.yaml is a Cloudformation template that sets up the code pipeline.

OpenSearch

SageMaker (ML model)

Cloudformation Template

template.yaml is a Cloudformation template that creates/updates all AWS resources needed in this project.

Input

• UserPoolIdentifier: Cognito
• ImgBucket: S3 bucket storing the search image
• PredictEndPoint: predict search image keywords
• OpensearchEndPoint: search product name with the image keywords
• RapidAPIKey: External API key

Output

• ApiUrl: API Gateway endpoint

Structure