# authorsauravkushwaha/historycal architecture

> Architecture diagram of the GitHub repository authorsauravkushwaha/historycal, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-09-26). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/authorsauravkushwaha/historycal
- Repository: https://github.com/authorsauravkushwaha/historycal

## Overview

HistoryCal is a desktop calendar whose main workflow is navigating an unbounded Gregorian month, selecting a day, and viewing that day’s personal events and historical events. The UI coordinates date calculations, recurring-event storage, deterministic date-based styling, and asynchronous history requests; users can also add, update, and remove personal events, and filter history to battle-related entries. Wikipedia data is cached locally for repeat and offline access. The graph follows the documented product layout and sampled calls; some UI wiring is inferred only where the excerpts show it explicitly.

Main entry points: [`historycal/ui.py`](https://github.com/authorsauravkushwaha/historycal/blob/main/historycal/ui.py) (Tkinter calendar UI), [`historycal/history_api.py`](https://github.com/authorsauravkushwaha/historycal/blob/main/historycal/history_api.py) (History fetch and filter), [`main.py`](https://github.com/authorsauravkushwaha/historycal/blob/main/main.py) (Application entry), [`historycal/storage.py`](https://github.com/authorsauravkushwaha/historycal/blob/main/historycal/storage.py) (Personal event store)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_interface["Desktop interface"]
  node_entry["Application entry<br/>[main.py]"]
  node_ui["Tkinter calendar UI<br/>[ui.py]"]
end

subgraph group_calendar["Calendar and events"]
  node_date_math["Unbounded date math<br/>[calendar_math.py]"]
  node_event_store["Personal event store<br/>[storage.py]"]
  node_event_file[("Events JSON file")]
end

subgraph group_history["Historical events"]
  node_history_api["History fetch and filter<br/>[history_api.py]"]
  node_wikipedia["Wikipedia REST API"]
  node_history_cache[("History cache files")]
end

subgraph group_appearance["Visual styling"]
  node_date_palette["Date-based palette<br/>[theme.py]"]
  node_canvas_draw["Canvas drawing helpers<br/>[theme.py]"]
end

node_user(("Calendar user"))

node_user -->|"launches"| node_entry
node_entry -->|"starts"| node_ui
node_user -->|"navigates and edits"| node_ui
node_ui -->|"builds date grid"| node_date_math
node_ui -->|"reads and edits events"| node_event_store
node_event_store -->|"loads and saves"| node_event_file
node_ui -->|"requests history"| node_history_api
node_history_api -->|"fetches events"| node_wikipedia
node_history_api -->|"reads and writes cache"| node_history_cache
node_history_api -->|"returns results"| node_ui
node_ui -->|"gets date palette"| node_date_palette
node_ui -->|"draws calendar"| node_canvas_draw

click node_entry "https://github.com/authorsauravkushwaha/historycal/blob/main/main.py"
click node_ui "https://github.com/authorsauravkushwaha/historycal/blob/main/historycal/ui.py"
click node_date_math "https://github.com/authorsauravkushwaha/historycal/blob/main/historycal/calendar_math.py"
click node_event_store "https://github.com/authorsauravkushwaha/historycal/blob/main/historycal/storage.py"
click node_history_api "https://github.com/authorsauravkushwaha/historycal/blob/main/historycal/history_api.py"
click node_date_palette "https://github.com/authorsauravkushwaha/historycal/blob/main/historycal/theme.py"
click node_canvas_draw "https://github.com/authorsauravkushwaha/historycal/blob/main/historycal/theme.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_entry,node_ui,node_user toneBlue
class node_date_math,node_event_store,node_event_file toneAmber
class node_history_api,node_wikipedia,node_history_cache toneMint
class node_date_palette,node_canvas_draw toneRose
```

## Components

### Desktop interface

- [Application entry](https://github.com/authorsauravkushwaha/historycal/blob/main/main.py): `main.py`
- [Tkinter calendar UI](https://github.com/authorsauravkushwaha/historycal/blob/main/historycal/ui.py): `historycal/ui.py`

### Calendar and events

- [Unbounded date math](https://github.com/authorsauravkushwaha/historycal/blob/main/historycal/calendar_math.py): `historycal/calendar_math.py`
- [Personal event store](https://github.com/authorsauravkushwaha/historycal/blob/main/historycal/storage.py): `historycal/storage.py`
- **Events JSON file**

### Historical events

- [History fetch and filter](https://github.com/authorsauravkushwaha/historycal/blob/main/historycal/history_api.py): `historycal/history_api.py`
- **Wikipedia REST API**
- **History cache files**

### Visual styling

- [Date-based palette](https://github.com/authorsauravkushwaha/historycal/blob/main/historycal/theme.py): `historycal/theme.py`
- [Canvas drawing helpers](https://github.com/authorsauravkushwaha/historycal/blob/main/historycal/theme.py): `historycal/theme.py`

### Other components

- **Calendar user**

## Connections

- Calendar user → Application entry: launches
- Application entry → Tkinter calendar UI: starts
- Calendar user → Tkinter calendar UI: navigates and edits
- Tkinter calendar UI → Unbounded date math: builds date grid
- Tkinter calendar UI → Personal event store: reads and edits events
- Personal event store → Events JSON file: loads and saves
- Tkinter calendar UI → History fetch and filter: requests history
- History fetch and filter → Wikipedia REST API: fetches events
- History fetch and filter → History cache files: reads and writes cache
- History fetch and filter → Tkinter calendar UI: returns results
- Tkinter calendar UI → Date-based palette: gets date palette
- Tkinter calendar UI → Canvas drawing helpers: draws calendar