# bivex/github-repo-visualizer architecture

> Architecture diagram of the GitHub repository bivex/github-repo-visualizer, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-06-30). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/bivex/github-repo-visualizer
- Repository: https://github.com/bivex/github-repo-visualizer

## Overview

1. **Repository shape**
   - This is a small, single-page, client-side application.
   - The entire system lives in three runtime files: `index.html` for structure, `script.js` for behavior, and `style.css` for presentation.
   - There is no backend, build pipeline, or database in the repo.

2. **Primary purpose**
   - The app visualizes a GitHub user’s repositories and helps identify which ones need attention.
   - It combines repository browsing, sorting, filtering, scoring, and export into one browser-based workflow.

3. **Presentation layer**
   - `index.html` is the application shell and likely contains the token entry area, search/filter controls, repository list area, modal dialogs, and export section.
   - The UI is built around Fomantic UI, so the page relies on framework components for layout, tables, modals, buttons, labels, and responsive behavior.
   - `style.css` provides the custom visual identity on top of Fomantic UI, including the color-coded language/topic/license badges and score progress styling.

4. **Application logic layer**
   - `script.js` is the main orchestration layer.
   - It is responsible for reading user input, calling GitHub APIs, transforming raw repository data, applying sort/filter/search rules, rendering views, and handling export actions.
   - The README’s named functions suggest a clear separation between data acquisition, scoring, rendering, sorting, and export.

5. **External integration boundary**
   - The only external system is the GitHub REST API v3.
   - Users supply a Personal Access Token, which the browser uses to authenticate repository requests.
   - This means the app’s trust boundary is the browser: token handling, API calls, and all data processing happen client-side.

6. **Data flow from GitHub to UI**
   - The flow starts with token entry and a repository fetch request.
   - Raw repository payloads from GitHub are then normalized into the app’s internal repository model.
   - That model feeds search, filter, and sort operations before being rendered as either cards or a table.

7. **Repository analysis subsystem**
   - Each repository is scored with an “improvement score” derived from metadata quality signals: description, topics, stars, recency, language, license, and forks.
   - This scoring layer is a key architectural feature because it produces a second derived dataset, not just a visual listing.
   - The score is used both for display and for sorting by “Need Improvements.”

8. **Display modes**
   - The app supports two main visualization modes: card view and table view.
   - This implies the rendering layer can project the same repository dataset into multiple UI representations without changing the underlying data model.
   - A details modal provides a third, focused inspection surface for a single repository.

9. **Search, filtering, and sorting pipeline**
   - Search and filters narrow the active repository set before it is rendered.
   - Sorting can operate on multiple repository attributes, including star count, fork count, name, license, update time, and the computed improvement score.
   - Architecturally, this is a client-side query pipeline applied to in-memory data after fetch.

10. **Export subsystem**
    - The export feature generates JSON for repositories that need improvements.
    - It intentionally excludes private repositories, which shows a data-shaping boundary between the full fetched dataset and the exportable subset.
    - The output is designed for copy/paste use in other scripts or automation rather than a file download flow.

11. **Accessibility and interaction model**
    - The README indicates keyboard navigation, skip links, and screen-reader support, so accessibility is a first-class UI concern.
    - Interactions are mainly direct manipulation: search, filter, sort, modal inspection, and copy-to-clipboard export.
    - The app is optimized for fast browsing and comparison rather than editing repositories in place.

12. **Operational characteristics**
    - The app is static and browser-hosted, making deployment trivial: open `index.html` and provide a token.
    - Because there is no server component, scaling, persistence, and security are handled differently than in a traditional multi-tier app: data lives in memory during the session, and the token is never stored by the app.
    - For an architecture diagram, the important boundaries are: browser UI, client-side logic, GitHub API, and transient in-memory repository data.

Main entry points: [`script.js`](https://github.com/bivex/github-repo-visualizer/blob/main/script.js) (App logic), [`index.html`](https://github.com/bivex/github-repo-visualizer/blob/main/index.html) (App shell), [`style.css`](https://github.com/bivex/github-repo-visualizer/blob/main/style.css) (UI styles)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_presentation["Presentation"]
  node_index_html["App shell<br/>html entry<br/>[index.html]"]
  node_style_css["UI styles<br/>css theme<br/>[style.css]"]
  node_fomantic_ui["Fomantic UI<br/>ui framework"]
  node_accessibility(("Accessible UI<br/>interaction"))
end

subgraph group_logic["Client Logic"]
  node_script_js["App logic<br/>browser controller<br/>[script.js]"]
  node_token_input(("Token entry<br/>auth input"))
  node_repo_fetch["Fetch repos<br/>api client"]
  node_repo_model[("Repo model<br/>normalized data")]
  node_score_engine{{"Improvement score<br/>analysis"}}
  node_query_pipeline["Query pipeline<br/>filter-sort"]
  node_card_view["Card view<br/>list render"]
  node_table_view["Table view<br/>table render"]
  node_details_modal["Details modal<br/>inspector"]
  node_export_json["Export JSON"]
  node_ui_controls["Search & sort<br/>interaction"]
end

subgraph group_integration["External Boundary"]
  node_github_api{{"GitHub API<br/>rest api"}}
end

node_index_html -->|"uses"| node_fomantic_ui
node_index_html -->|"loads"| node_script_js
node_index_html -->|"styles with"| node_style_css
node_script_js -->|"reads"| node_token_input
node_token_input -->|"authenticates"| node_repo_fetch
node_repo_fetch -->|"requests"| node_github_api
node_github_api -->|"returns data"| node_repo_model
node_script_js -->|"stores"| node_repo_model
node_repo_model -->|"analyzes"| node_score_engine
node_score_engine -->|"feeds"| node_query_pipeline
node_repo_model -->|"queries"| node_query_pipeline
node_query_pipeline -->|"renders"| node_card_view
node_query_pipeline -->|"renders"| node_table_view
node_query_pipeline -->|"inspects"| node_details_modal
node_score_engine -->|"exports"| node_export_json
node_repo_model -->|"filters subset"| node_export_json
node_ui_controls -->|"drives"| node_query_pipeline
node_script_js -->|"handles"| node_ui_controls
node_script_js -->|"updates"| node_card_view
node_script_js -->|"updates"| node_table_view
node_script_js -->|"opens"| node_details_modal
node_script_js -->|"generates"| node_export_json
node_accessibility -->|"supports"| node_index_html
node_style_css -->|"reinforces"| node_accessibility

click node_index_html "https://github.com/bivex/github-repo-visualizer/blob/main/index.html"
click node_style_css "https://github.com/bivex/github-repo-visualizer/blob/main/style.css"
click node_script_js "https://github.com/bivex/github-repo-visualizer/blob/main/script.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_index_html,node_style_css,node_fomantic_ui,node_accessibility toneBlue
class node_script_js,node_token_input,node_repo_fetch,node_repo_model,node_score_engine,node_query_pipeline,node_card_view,node_table_view,node_details_modal,node_export_json,node_ui_controls toneAmber
class node_github_api toneMint
```

## Components

### Presentation

Static app shell and styling.

- [App shell](https://github.com/bivex/github-repo-visualizer/blob/main/index.html): html entry · Single-page structure for controls, repository views, modal dialogs, and export area. · `index.html`
- [UI styles](https://github.com/bivex/github-repo-visualizer/blob/main/style.css): css theme · Custom visual styling layered on top of Fomantic UI. · `style.css`
- **Fomantic UI**: ui framework · Layout, table, modal, button, label, and responsive UI components used by the page.
- **Accessible UI**: interaction · Keyboard navigation, skip links, and screen-reader support.

### Client Logic

Browser-side data flow and repository analysis.

- [App logic](https://github.com/bivex/github-repo-visualizer/blob/main/script.js): browser controller · Main orchestration for fetching, scoring, filtering, sorting, rendering, and export. · `script.js`
- **Token entry**: auth input · User-supplied personal access token used for authenticated API requests.
- **Fetch repos**: api client · Requests repository payloads from GitHub using the provided token.
- **Repo model**: normalized data · In-memory normalized repository records used by the rest of the app.
- **Improvement score**: analysis · Derives repository quality scores from metadata signals such as description, topics, stars, recency, language, license, and forks.
- **Query pipeline**: filter-sort · Applies search, filtering, and sorting to the in-memory repository set.
- **Card view**: list render · Primary visual browsing mode for repositories.
- **Table view**: table render · Dense comparison mode for repositories.
- **Details modal**: inspector · Focused single-repository inspection surface.
- **Export JSON**: export · Produces copyable JSON for repositories needing improvements, excluding private repositories.
- **Search & sort**: interaction · Search, filter, and sort controls that drive the active repository view.

### External Boundary

GitHub API and user-provided authentication token.

- **GitHub API**: rest api · External repository data source accessed from the browser.

## Connections

- App shell → Fomantic UI: uses · The shell composes the interface from framework components.
- App shell → App logic: loads · The page loads the browser controller.
- App shell → UI styles: styles with · Custom presentation layers on top of the framework.
- App logic → Token entry: reads · Captures the user token before any API request.
- Token entry → Fetch repos: authenticates · Supplies credentials for repository fetches.
- Fetch repos → GitHub API: requests · Retrieves repository data from GitHub REST API v3.
- GitHub API → Repo model: returns data · Raw payloads are normalized into in-memory records.
- App logic → Repo model: stores · Keeps the active repository dataset in browser memory.
- Repo model → Improvement score: analyzes · Scores each repository using metadata quality signals.
- Improvement score → Query pipeline: feeds · Computed scores become one of the sortable and filterable fields.
- Repo model → Query pipeline: queries · Search, filters, and sorting operate on normalized records.
- Query pipeline → Card view: renders · Projects the filtered set into card-based browsing.
- Query pipeline → Table view: renders · Projects the filtered set into table-based browsing.
- Query pipeline → Details modal: inspects · Single repository selection opens the details modal.
- Improvement score → Export JSON: exports · Produces the improvement-focused subset for copy/paste export.
- Repo model → Export JSON: filters subset · Excludes private repositories and keeps only exportable items.
- Search & sort → Query pipeline: drives · Search, filter, and sort controls update the active query.
- App logic → Search & sort: handles · Binds user interactions to the client-side pipeline.
- App logic → Card view: updates · Re-renders card mode from the current dataset.
- App logic → Table view: updates · Re-renders table mode from the current dataset.
- App logic → Details modal: opens · Populates and shows repository details on demand.
- App logic → Export JSON: generates · Builds copyable JSON output for sharing or automation.
- Accessible UI → App shell: supports · Skip links and semantics improve keyboard and screen-reader use.
- UI styles → Accessible UI: reinforces · Visual treatment supports readable, navigable interactions.