platform/docs/assets/diagrams/flows/request_lifecycle.mmd

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sequenceDiagram
participant Client
participant Server as HTTP Server
participant Kernel as HTTP Kernel
participant Pipeline as Middleware Pipeline
participant Router
participant Controller
participant Services
participant Events
participant DB as Database
%% Initial Request
Client->>Server: HTTP Request
activate Server
Server->>Kernel: Handle Request
activate Kernel
%% Global Middleware
Kernel->>Pipeline: Process Global Middleware
activate Pipeline
Note over Pipeline: - Check Maintenance Mode<br>- Validate Post Size<br>- Trim Strings<br>- Convert Empty to Null
Pipeline-->>Kernel: Request Processed
deactivate Pipeline
%% Route Matching
Kernel->>Router: Match Route
activate Router
Router-->>Kernel: Route Found
deactivate Router
%% Route Middleware
Kernel->>Pipeline: Process Route Middleware
activate Pipeline
Note over Pipeline: - Authentication<br>- Authorization<br>- Throttling<br>- CSRF Protection
Pipeline-->>Kernel: Request Processed
deactivate Pipeline
%% Controller Action
Kernel->>Controller: Handle Request
activate Controller
%% Service Layer
Controller->>Services: Process Business Logic
activate Services
%% Database Operations
Services->>DB: Query Data
activate DB
DB-->>Services: Data Retrieved
deactivate DB
%% Event Dispatching
Services->>Events: Dispatch Events
activate Events
Note over Events: - Model Events<br>- Custom Events<br>- System Events
Events-->>Services: Events Processed
deactivate Events
Services-->>Controller: Logic Processed
deactivate Services
%% Response Generation
Controller-->>Kernel: Generate Response
deactivate Controller
%% Response Middleware
Kernel->>Pipeline: Process Response Middleware
activate Pipeline
Note over Pipeline: - Session<br>- Cookies<br>- Headers<br>- Response Compression
Pipeline-->>Kernel: Response Processed
deactivate Pipeline
%% Final Response
Kernel-->>Server: Return Response
deactivate Kernel
Server-->>Client: HTTP Response
deactivate Server
%% Style Definitions
style Client fill:#f9f,stroke:#333,stroke-width:2px
style Server fill:#bbf,stroke:#333,stroke-width:2px
style Kernel fill:#bbf,stroke:#333,stroke-width:2px
style Pipeline fill:#bfb,stroke:#333,stroke-width:2px
style Router fill:#bfb,stroke:#333,stroke-width:2px
style Controller fill:#bfb,stroke:#333,stroke-width:2px
style Services fill:#fbb,stroke:#333,stroke-width:2px
style Events fill:#fbb,stroke:#333,stroke-width:2px
style DB fill:#fbb,stroke:#333,stroke-width:2px
%% Notes
Note right of Server: Entry Point
Note right of Kernel: Request Processing
Note right of Pipeline: Middleware Chain
Note right of Router: Route Resolution
Note right of Controller: Business Logic
Note right of Services: Service Layer
Note right of Events: Event System
Note right of DB: Data Layer