Middleware API Specification

[git-union]

Middleware API Specification

As a developer, I want a middleware capable of handling both REST and GraphQL endpoints with GraphQL as the base to ensure versatility and flexibility in API consumption by clients.

Acceptance Criteria

• The middleware must initialize a GraphQL server with a defined schema.
• The GraphQL server should expose a single endpoint for GraphQL operations.
• RESTful endpoints must translate requests into GraphQL queries/mutations.
• The system should validate REST requests and construct proper GraphQL queries.
• Errors from REST endpoint conversions must be handled and relayed as RESTful responses.
• Middleware should include authorization checks for protected endpoints.
• Performance metrics must be logged for both REST and GraphQL requests.
• Should be able to extend the API with additional REST endpoints without impacting existing GraphQL capabilities.

sequenceDiagram
  participant Client
  participant Middleware
  participant GraphQL
  Client->>Middleware: REST request /users
  alt REST to GraphQL Conversion
    Middleware->>GraphQL: Query users {}
    GraphQL-->>Middleware: Users data
    Middleware-->>Client: 200 OK, Users data
  else Direct GraphQL Request
    Client->>GraphQL: POST /graphql { query: users }
    GraphQL-->>Client: 200 OK, Users data
  end

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