# themisvaltinos/auction-website architecture

> Architecture diagram of the GitHub repository themisvaltinos/auction-website, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-09-25). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/themisvaltinos/auction-website
- Repository: https://github.com/themisvaltinos/auction-website

## Overview

Auction Point is a full-stack auction marketplace. Users browse and filter listings, inspect an auction, then bid or buy; sellers create and manage listings, and buyers and sellers coordinate through an in-app mail client. Authentication and role-based access govern user and admin capabilities. The README also documents recommendations, maps, photo uploads, and admin exports. The graph uses the provided tree and sampled code; some feature wiring is based on README descriptions because those source files were not sampled.

Main entry points: [`front/src/App.js`](https://github.com/themisvaltinos/auction-website/blob/main/front/src/App.js) (React app), [`api/routes/Items.js`](https://github.com/themisvaltinos/auction-website/blob/main/api/routes/Items.js) (Listings and auctions), [`api/index.js`](https://github.com/themisvaltinos/auction-website/blob/main/api/index.js) (Express API), [`api/models/index.js`](https://github.com/themisvaltinos/auction-website/blob/main/api/models/index.js) (Sequelize models)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_client["Web client"]
  node_app["React app<br/>[App.js]"]
  node_authui["Login and registration<br/>[Registration.js]"]
  node_searchui["Auction search"]
  node_itemui["Auction details<br/>[Item.js]"]
  node_createui["Listing creation<br/>[CreateItem.js]"]
  node_photosui["Photo tools<br/>[AddPhotos.js]"]
  node_profileui["Profiles and dashboard<br/>[Dashboard.js]"]
  node_mailui["Mail client<br/>[MailToggle.js]"]
  node_adminui["Admin tools<br/>[Export.js]"]
  node_mapsui["Listing maps<br/>[OsmProvider.js]"]
end

subgraph group_market["Marketplace API"]
  node_server["Express API<br/>[index.js]"]
  node_items["Listings and auctions<br/>[Items.js]"]
  node_bids["Bidding<br/>[Bids.js]"]
  node_categories["Categories<br/>[Categories.js]"]
  node_photos["Photo handling<br/>[Photos.js]"]
  node_history["User activity history<br/>[History.js]"]
end

subgraph group_identity["Identity and users"]
  node_authapi["Authentication routes<br/>[Users.js]"]
  node_authmw["Token validation<br/>[Authent.js]"]
end

subgraph group_communication["Mail and recommendations"]
  node_mailapi["Mail and messages<br/>[Mail.js]"]
  node_recommender["Recommendation training<br/>[recommender.py]"]
end

subgraph group_persistence["Persistence"]
  node_models["Sequelize models<br/>[index.js]"]
  node_database[("Relational database")]
end

node_visitor(("Marketplace user"))
node_openstreetmap["OpenStreetMap"]

node_visitor -->|"uses"| node_app
node_app -->|"validates session"| node_authapi
node_app -->|"routes to"| node_searchui
node_app -->|"routes to"| node_itemui
node_app -->|"routes to"| node_createui
node_app -->|"routes to"| node_profileui
node_app -->|"routes to"| node_mailui
node_app -->|"routes to"| node_adminui
node_searchui -->|"fetches listings"| node_items
node_searchui -->|"fetches categories"| node_categories
node_itemui -->|"reads and updates"| node_items
node_itemui -->|"submits bids"| node_bids
node_itemui -->|"records activity"| node_history
node_createui -->|"creates listing"| node_items
node_createui -->|"manages photos"| node_photosui
node_photosui -->|"uploads photos"| node_photos
node_itemui -->|"shows location"| node_mapsui
node_mapsui -.->|"displays map"| node_openstreetmap
node_mailui -->|"sends and reads"| node_mailapi
node_adminui -->|"exports listings"| node_items
node_server -->|"mounts routes"| node_items
node_server -->|"mounts routes"| node_bids
node_server -->|"mounts routes"| node_categories
node_server -->|"mounts routes"| node_photos
node_server -->|"mounts routes"| node_history
node_server -->|"mounts routes"| node_authapi
node_server -->|"mounts routes"| node_mailapi
node_items -->|"validates protected requests"| node_authmw
node_authapi -->|"validates tokens"| node_authmw
node_items -->|"queries models"| node_models
node_bids -->|"queries models"| node_models
node_categories -->|"queries models"| node_models
node_photos -->|"queries models"| node_models
node_history -->|"queries models"| node_models
node_authapi -->|"queries models"| node_models
node_mailapi -->|"queries models"| node_models
node_models -->|"reads and writes"| node_database
node_recommender -->|"reads history; writes recommendations"| node_database
node_items -.->|"serves recommendations"| node_recommender

click node_app "https://github.com/themisvaltinos/auction-website/blob/main/front/src/App.js"
click node_authui "https://github.com/themisvaltinos/auction-website/blob/main/front/src/components/Login/Registration.js"
click node_searchui "https://github.com/themisvaltinos/auction-website/blob/main/front/src/components/Searching/FilterCategories.js"
click node_itemui "https://github.com/themisvaltinos/auction-website/blob/main/front/src/pages/Item.js"
click node_createui "https://github.com/themisvaltinos/auction-website/blob/main/front/src/pages/CreateItem.js"
click node_photosui "https://github.com/themisvaltinos/auction-website/blob/main/front/src/components/Photos/AddPhotos.js"
click node_profileui "https://github.com/themisvaltinos/auction-website/blob/main/front/src/pages/Dashboard.js"
click node_mailui "https://github.com/themisvaltinos/auction-website/blob/main/front/src/pages/MailToggle.js"
click node_adminui "https://github.com/themisvaltinos/auction-website/blob/main/front/src/pages/Export.js"
click node_mapsui "https://github.com/themisvaltinos/auction-website/blob/main/front/src/components/Maps/OsmProvider.js"
click node_server "https://github.com/themisvaltinos/auction-website/blob/main/api/index.js"
click node_items "https://github.com/themisvaltinos/auction-website/blob/main/api/routes/Items.js"
click node_bids "https://github.com/themisvaltinos/auction-website/blob/main/api/routes/Bids.js"
click node_categories "https://github.com/themisvaltinos/auction-website/blob/main/api/routes/Categories.js"
click node_photos "https://github.com/themisvaltinos/auction-website/blob/main/api/routes/Photos.js"
click node_history "https://github.com/themisvaltinos/auction-website/blob/main/api/routes/History.js"
click node_authapi "https://github.com/themisvaltinos/auction-website/blob/main/api/routes/Users.js"
click node_authmw "https://github.com/themisvaltinos/auction-website/blob/main/api/middlewares/Authent.js"
click node_mailapi "https://github.com/themisvaltinos/auction-website/blob/main/api/routes/Mail.js"
click node_recommender "https://github.com/themisvaltinos/auction-website/blob/main/api/recommender/recommender.py"
click node_models "https://github.com/themisvaltinos/auction-website/blob/main/api/models/index.js"

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_app,node_authui,node_searchui,node_itemui,node_createui,node_photosui,node_profileui,node_mailui,node_adminui,node_mapsui,node_visitor toneBlue
class node_server,node_items,node_bids,node_categories,node_photos,node_history toneAmber
class node_authapi,node_authmw toneMint
class node_mailapi,node_recommender toneRose
class node_models,node_database,node_openstreetmap toneIndigo
```

## Components

### Web client

- [React app](https://github.com/themisvaltinos/auction-website/blob/main/front/src/App.js): `front/src/App.js`
- [Login and registration](https://github.com/themisvaltinos/auction-website/blob/main/front/src/components/Login/Registration.js): `front/src/components/Login/Registration.js`
- [Auction search](https://github.com/themisvaltinos/auction-website/blob/main/front/src/components/Searching/FilterCategories.js): `front/src/components/Searching/FilterCategories.js`
- [Auction details](https://github.com/themisvaltinos/auction-website/blob/main/front/src/pages/Item.js): `front/src/pages/Item.js`
- [Listing creation](https://github.com/themisvaltinos/auction-website/blob/main/front/src/pages/CreateItem.js): `front/src/pages/CreateItem.js`
- [Photo tools](https://github.com/themisvaltinos/auction-website/blob/main/front/src/components/Photos/AddPhotos.js): `front/src/components/Photos/AddPhotos.js`
- [Profiles and dashboard](https://github.com/themisvaltinos/auction-website/blob/main/front/src/pages/Dashboard.js): `front/src/pages/Dashboard.js`
- [Mail client](https://github.com/themisvaltinos/auction-website/blob/main/front/src/pages/MailToggle.js): `front/src/pages/MailToggle.js`
- [Admin tools](https://github.com/themisvaltinos/auction-website/blob/main/front/src/pages/Export.js): `front/src/pages/Export.js`
- [Listing maps](https://github.com/themisvaltinos/auction-website/blob/main/front/src/components/Maps/OsmProvider.js): `front/src/components/Maps/OsmProvider.js`

### Marketplace API

- [Express API](https://github.com/themisvaltinos/auction-website/blob/main/api/index.js): `api/index.js`
- [Listings and auctions](https://github.com/themisvaltinos/auction-website/blob/main/api/routes/Items.js): `api/routes/Items.js`
- [Bidding](https://github.com/themisvaltinos/auction-website/blob/main/api/routes/Bids.js): `api/routes/Bids.js`
- [Categories](https://github.com/themisvaltinos/auction-website/blob/main/api/routes/Categories.js): `api/routes/Categories.js`
- [Photo handling](https://github.com/themisvaltinos/auction-website/blob/main/api/routes/Photos.js): `api/routes/Photos.js`
- [User activity history](https://github.com/themisvaltinos/auction-website/blob/main/api/routes/History.js): `api/routes/History.js`

### Identity and users

- [Authentication routes](https://github.com/themisvaltinos/auction-website/blob/main/api/routes/Users.js): `api/routes/Users.js`
- [Token validation](https://github.com/themisvaltinos/auction-website/blob/main/api/middlewares/Authent.js): `api/middlewares/Authent.js`

### Mail and recommendations

- [Mail and messages](https://github.com/themisvaltinos/auction-website/blob/main/api/routes/Mail.js): `api/routes/Mail.js`
- [Recommendation training](https://github.com/themisvaltinos/auction-website/blob/main/api/recommender/recommender.py): `api/recommender/recommender.py`

### Persistence

- [Sequelize models](https://github.com/themisvaltinos/auction-website/blob/main/api/models/index.js): `api/models/index.js`
- **Relational database**

### Other components

- **Marketplace user**
- **OpenStreetMap**

## Connections

- Marketplace user → React app: uses
- React app → Authentication routes: validates session
- React app → Auction search: routes to
- React app → Auction details: routes to
- React app → Listing creation: routes to
- React app → Profiles and dashboard: routes to
- React app → Mail client: routes to
- React app → Admin tools: routes to
- Auction search → Listings and auctions: fetches listings
- Auction search → Categories: fetches categories
- Auction details → Listings and auctions: reads and updates
- Auction details → Bidding: submits bids
- Auction details → User activity history: records activity
- Listing creation → Listings and auctions: creates listing
- Listing creation → Photo tools: manages photos
- Photo tools → Photo handling: uploads photos
- Auction details → Listing maps: shows location
- Listing maps → OpenStreetMap: displays map
- Mail client → Mail and messages: sends and reads
- Admin tools → Listings and auctions: exports listings
- Express API → Listings and auctions: mounts routes
- Express API → Bidding: mounts routes
- Express API → Categories: mounts routes
- Express API → Photo handling: mounts routes
- Express API → User activity history: mounts routes
- Express API → Authentication routes: mounts routes
- Express API → Mail and messages: mounts routes
- Listings and auctions → Token validation: validates protected requests
- Authentication routes → Token validation: validates tokens
- Listings and auctions → Sequelize models: queries models
- Bidding → Sequelize models: queries models
- Categories → Sequelize models: queries models
- Photo handling → Sequelize models: queries models
- User activity history → Sequelize models: queries models
- Authentication routes → Sequelize models: queries models
- Mail and messages → Sequelize models: queries models
- Sequelize models → Relational database: reads and writes
- Recommendation training → Relational database: reads history; writes recommendations
- Listings and auctions → Recommendation training: serves recommendations