# aheritianad/flash_fastapi architecture

> Architecture diagram of the GitHub repository aheritianad/flash_fastapi, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-11-12). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/aheritianad/flash_fastapi
- Repository: https://github.com/aheritianad/flash_fastapi

## Overview

This is a small FastAPI flash-messaging utility. A request handler adds a categorized message, retrieves and clears messages from the request session, and returns them. The implementation is limited to the flash API and a sample FastAPI app; session middleware is configured in that app. The README documents template use and HTMX interactions, but no separate integration code is present in the tree. The graph reflects the shown sample workflow and session access.

Main entry points: [`main.py`](https://github.com/aheritianad/flash_fastapi/blob/main/main.py) (Sample FastAPI app), [`flash.py`](https://github.com/aheritianad/flash_fastapi/blob/main/flash.py) (Flash API and categories)

## Diagram (Mermaid)

```mermaid
flowchart TD

node_user(("Requesting client"))
node_app["Sample FastAPI app<br/>[main.py]"]
node_flash["Flash API and categories<br/>[flash.py]"]
node_session["Request session"]
node_middleware["Session middleware"]

node_user -->|"requests route"| node_app
node_app -->|"adds message"| node_flash
node_app -->|"retrieves messages"| node_flash
node_flash -->|"reads and clears"| node_session
node_flash -->|"writes messages"| node_session
node_app -->|"configures"| node_middleware
node_app -->|"returns messages"| node_user

click node_app "https://github.com/aheritianad/flash_fastapi/blob/main/main.py"
click node_flash "https://github.com/aheritianad/flash_fastapi/blob/main/flash.py"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_user toneBlue
class node_app,node_flash,node_session toneMint
class node_middleware toneIndigo
```

## Components

### Other components

- **Requesting client**
- [Sample FastAPI app](https://github.com/aheritianad/flash_fastapi/blob/main/main.py): `main.py`
- [Flash API and categories](https://github.com/aheritianad/flash_fastapi/blob/main/flash.py): `flash.py`
- **Request session**
- **Session middleware**

## Connections

- Requesting client → Sample FastAPI app: requests route (evidence: `main.py`)
- Sample FastAPI app → Flash API and categories: adds message (evidence: `main.py`)
- Sample FastAPI app → Flash API and categories: retrieves messages (evidence: `main.py`)
- Flash API and categories → Request session: reads and clears (evidence: `flash.py`)
- Flash API and categories → Request session: writes messages (evidence: `flash.py`)
- Sample FastAPI app → Session middleware: configures (evidence: `main.py`)
- Sample FastAPI app → Requesting client: returns messages (evidence: `main.py`)