• docker

1. Clone project:

git clone https://github.com/vlasashk/user-segmentation.git
cd user-segmentation

2. Run:

docker compose up --build

API for dynamic user segmentation for testing new functionality

• UserID must be unique, otherwise it won't be allowed to add one
• Segment name must be unique, otherwise it won't be allowed to add one
• User can be added to segment only if user and segment both exist in database
• All segments present in the list to be added to a user must exist in the database. Even if a single segment doesn't exist then the request will be aborted and none of the segments will be added to a user
• If segment is already assigned to user then the request will be aborted and none of the segments from the list will be added to a user
• Deleting segment from database will cascade delete it from every user and history for this segment won't be available
• Deleting segment from a user doesn't delete record from database, instead of deletion it marks deleted_at field with current date
• In order to remove user from segment - all segments from the request must be present in database
• If user is not part of some segments from the removal list then the removal request will be aborted and none of the segments from the list will be removed from a user

• PostgreSQL as database
• jackc/pgx package as toolkit for PostgreSQL
• go-chi/chi package as router for building HTTP service
• swaggo/swag package as swagger doc generator
• Docker for deployment

Swagger generated documentation will be available after run at https://localhost:8090/swagger/index.html (or different port if .env file was edited)

• {POST} /user/new - Add new user to database.
  Request Body JSON:

{
    "user_id": 10
}

• {POST} /user/addSegment - Add list of segments to user. User and each segment must be present in database for successful execution otherwise it won't ve allowed.
  Request Body JSON:

{
    "user_id": 10,
    "segment_slug": ["AVITO", "AVITO_10", "AVITO_30"]
}

• {GET} /user/segments/{userID} - Return the list of segments the user is a member of.
  Request Body is not required.
• {DELETE} /user/segments - Remove user from chosen segments by marking deleted_at field.
  Request Body JSON:

{
    "user_id": 10,
    "segment_slug": ["AVITO", "AVITO_10", "AVITO_30"]
}

• {POST} /segment/new Add new segment to database.
  Request Body JSON:

{
    "slug": "test"
}

• {DELETE} /segment/remove Cascade delete segment. This method will permanently delete segment and all it's relations between user-segment.
  Request Body JSON:

{
    "slug": "test"
}

• {GET} /segment/users/{segmentName} - Return the list of users the segment has.
  Request Body is not required.

• {POST} /report - Return the link to csv file with report for chosen month.
  Request Body JSON:

{
    "year": 2023,
    "month": 9
}

• {GET} /report/{fileName} - Download the csv file with report for chosen month.
  Request Body is not required.