# monty-bounty/user-registration-tkinter architecture

> Architecture diagram of the GitHub repository monty-bounty/user-registration-tkinter, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-08-01). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/monty-bounty/user-registration-tkinter
- Repository: https://github.com/monty-bounty/user-registration-tkinter

## Overview

#### Purpose and execution

A standalone Python 3.10+ desktop application for user registration and login. It uses Tkinter, has no backend service or external dependencies, and starts through `main.py`. User records are persisted locally in `users.data`.

#### Application shell and GUI navigation

`main.py` is the application entry point and owns the Tkinter event loop, window lifecycle, and screen transitions. The primary UI states are login, registration, and authenticated profile/cabinet views, reflected in the documented screenshots under `docs/screenshots/`.

Paths: `main.py`, `docs/screenshots`, `docs/screenshots/login.png`

#### Registration flow

The registration screen collects identity and account fields: surname, name, patronymic, birth date, gender, city, email, login, and password. On successful submission, the application constructs a user record, encodes the password, appends the record to in-memory user data, and persists the complete collection.

Paths: `main.py`, `users.data`

#### Authentication and profile flow

At startup, persisted users are loaded from the local data file. Login accepts a username and password, locates the corresponding stored record, applies the same XOR transformation for comparison, and transitions successful users to the profile view. Failed credentials remain within the GUI boundary; there is no remote identity provider or session service.

Paths: `main.py`, `users.data`, `xor_cipher.py`

#### Credential transformation boundary

Password handling is isolated around a demonstrative XOR cipher implementation. The same fixed-key reversible transformation is used when storing a registration password and validating a login password. This is explicitly educational rather than secure; replacing it with salted password hashing would be the main security boundary change.

Paths: `xor_cipher.py`, `main.py`

#### Local persistence boundary

`users.data` is the sole datastore: semicolon-delimited CSV records with nine ordered fields, ending in the XOR-encoded password. File loading occurs during application initialization; registration triggers a rewrite/save. The application therefore assumes local filesystem read/write access and has no concurrency, migration, or server-side data layer.

Paths: `users.data`, `main.py`

#### Runtime and distribution

The runtime is CPython with standard-library Tkinter and CSV support. Tkinter availability is the only notable platform prerequisite, particularly on Linux. The app can optionally be packaged as a Windows single-file executable with PyInstaller, but packaging is not part of runtime architecture.

Paths: `main.py`, `README.md`

Main entry points: [`main.py`](https://github.com/monty-bounty/user-registration-tkinter/blob/master/main.py) (Application entry), [`users.data`](https://github.com/monty-bounty/user-registration-tkinter/blob/master/users.data) (users.data), [`xor_cipher.py`](https://github.com/monty-bounty/user-registration-tkinter/blob/master/xor_cipher.py) (XOR cipher), [`docs/screenshots`](https://github.com/monty-bounty/user-registration-tkinter/tree/master/docs/screenshots) (UI screenshots)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_ui["Tkinter UI"]
  node_login["Login screen<br/>UI state<br/>[main.py]"]
  node_registration["Registration screen<br/>UI state<br/>[main.py]"]
  node_profile["Profile / cabinet<br/>authenticated UI state<br/>[main.py]"]
  node_registration_fields["Registration fields<br/>form input<br/>[main.py]"]
end

subgraph group_core["Application Core"]
  node_entry["Application entry<br/>Python entry point<br/>[main.py]"]
  node_runtime{{"CPython + Tkinter<br/>runtime"}}
  node_auth["Credential validation<br/>authentication flow<br/>[main.py]"]
  node_user_records["In-memory user records<br/>application state<br/>[main.py]"]
  node_cipher{{"XOR cipher<br/>credential transform<br/>[xor_cipher.py]"}}
end

subgraph group_storage["Local Persistence"]
  node_data_file[("users.data<br/>semicolon CSV datastore<br/>[users.data]")]
end

node_screenshots["UI screenshots<br/>documentation"]
node_login_screenshot["Login screenshot<br/>documentation asset"]
node_readme["Runtime / packaging notes<br/>documentation<br/>[README.md]"]

node_runtime -->|"runs"| node_entry
node_entry -->|"initial screen"| node_login
node_entry -->|"navigates to"| node_registration
node_entry -->|"shows after login"| node_profile
node_registration -->|"collects"| node_registration_fields
node_registration_fields -->|"password encoded"| node_cipher
node_registration_fields -->|"creates record"| node_user_records
node_user_records -->|"rewrites on registration"| node_data_file
node_data_file -->|"loads at startup"| node_user_records
node_login -->|"submits credentials"| node_auth
node_auth -->|"locates user"| node_user_records
node_auth -->|"transforms for comparison"| node_cipher
node_auth -->|"valid credentials"| node_profile
node_screenshots -->|"contains"| node_login_screenshot
node_readme -.->|"documents"| node_runtime

click node_entry "https://github.com/monty-bounty/user-registration-tkinter/blob/master/main.py"
click node_login "https://github.com/monty-bounty/user-registration-tkinter/blob/master/main.py"
click node_registration "https://github.com/monty-bounty/user-registration-tkinter/blob/master/main.py"
click node_profile "https://github.com/monty-bounty/user-registration-tkinter/blob/master/main.py"
click node_registration_fields "https://github.com/monty-bounty/user-registration-tkinter/blob/master/main.py"
click node_auth "https://github.com/monty-bounty/user-registration-tkinter/blob/master/main.py"
click node_user_records "https://github.com/monty-bounty/user-registration-tkinter/blob/master/main.py"
click node_cipher "https://github.com/monty-bounty/user-registration-tkinter/blob/master/xor_cipher.py"
click node_data_file "https://github.com/monty-bounty/user-registration-tkinter/blob/master/users.data"
click node_screenshots "https://github.com/monty-bounty/user-registration-tkinter/tree/master/docs/screenshots"
click node_readme "https://github.com/monty-bounty/user-registration-tkinter/blob/master/README.md"

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_login,node_registration,node_profile,node_registration_fields toneBlue
class node_entry,node_runtime,node_auth,node_user_records,node_cipher toneAmber
class node_data_file toneMint
class node_screenshots,node_login_screenshot,node_readme toneNeutral
```

## Components

### Tkinter UI

- [Login screen](https://github.com/monty-bounty/user-registration-tkinter/blob/master/main.py): UI state · `main.py`
- [Registration screen](https://github.com/monty-bounty/user-registration-tkinter/blob/master/main.py): UI state · `main.py`
- [Profile / cabinet](https://github.com/monty-bounty/user-registration-tkinter/blob/master/main.py): authenticated UI state · `main.py`
- [Registration fields](https://github.com/monty-bounty/user-registration-tkinter/blob/master/main.py): form input · Captures identity, profile, login, and password fields. · `main.py`

### Application Core

- [Application entry](https://github.com/monty-bounty/user-registration-tkinter/blob/master/main.py): Python entry point · Owns window lifecycle, event loop, and screen transitions. · `main.py`
- **CPython + Tkinter**: runtime · Python 3.10+ standard-library desktop runtime.
- [Credential validation](https://github.com/monty-bounty/user-registration-tkinter/blob/master/main.py): authentication flow · Finds a user record and compares transformed credentials. · `main.py`
- [In-memory user records](https://github.com/monty-bounty/user-registration-tkinter/blob/master/main.py): application state · Complete user collection loaded and updated by the app. · `main.py`
- [XOR cipher](https://github.com/monty-bounty/user-registration-tkinter/blob/master/xor_cipher.py): credential transform · Fixed-key reversible password transformation. · `xor_cipher.py`

### Local Persistence

- [users.data](https://github.com/monty-bounty/user-registration-tkinter/blob/master/users.data): semicolon CSV datastore · Nine ordered fields per user; encoded password is last. · `users.data`

### Other components

- [UI screenshots](https://github.com/monty-bounty/user-registration-tkinter/tree/master/docs/screenshots): documentation · `docs/screenshots`
- **Login screenshot**: documentation asset
- [Runtime / packaging notes](https://github.com/monty-bounty/user-registration-tkinter/blob/master/README.md): documentation · Documents Tkinter prerequisite and optional PyInstaller packaging. · `README.md`

## Connections

- CPython + Tkinter → Application entry: runs
- Application entry → Login screen: initial screen
- Application entry → Registration screen: navigates to
- Application entry → Profile / cabinet: shows after login
- Registration screen → Registration fields: collects
- Registration fields → XOR cipher: password encoded
- Registration fields → In-memory user records: creates record
- In-memory user records → users.data: rewrites on registration
- users.data → In-memory user records: loads at startup
- Login screen → Credential validation: submits credentials
- Credential validation → In-memory user records: locates user
- Credential validation → XOR cipher: transforms for comparison
- Credential validation → Profile / cabinet: valid credentials
- UI screenshots → Login screenshot: contains
- Runtime / packaging notes → CPython + Tkinter: documents