# bodhijain9425-debug/weatherwala architecture

> Architecture diagram of the GitHub repository bodhijain9425-debug/weatherwala, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-06-18). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/bodhijain9425-debug/weatherwala
- Repository: https://github.com/bodhijain9425-debug/weatherwala

## Overview

1. **Project shape**
   - WeatherWala is a **TypeScript React single-page app** built with **Vite**.
   - The repository is split into a **browser client** under `src/` and a small **API layer** under `api/`, which suggests the app can fetch or refresh weather data through serverless-style endpoints.

2. **Top-level architecture**
   - The app is organized around a **weather visualization workflow**:
     - choose a weather layer,
     - choose a time in a timeline,
     - fetch or load grid data,
     - render it on a map,
     - show the color legend for interpretation.
   - The main visual output is a **map-based weather overlay UI**, not a general-purpose dashboard.

3. **Client entry and composition**
   - `src/main.tsx` bootstraps the app.
   - `src/App.tsx` appears to compose the primary screen by combining:
     - the header,
     - layer switcher,
     - map view,
     - timeline,
     - legend.
   - This is the main UI assembly boundary.

4. **State management**
   - `src/store/appStore.ts` is the central application state store.
   - It likely holds the current selected weather layer, selected time/frame, loading state, and possibly cached grid data.
   - This store is the coordination point between controls and visualization, so it is important in the architecture diagram as the shared state hub.

5. **Weather data access boundary**
   - `src/api/weatherClient.ts` is the client-side API adapter.
   - It abstracts communication with the backend/API endpoints so components and hooks do not call endpoints directly.
   - This is the main data-access boundary between the React UI and weather data sources.

6. **Server/API layer**
   - `api/weather-grid.ts` likely serves weather grid payloads used by the map overlay.
   - `api/refresh-cache.ts` suggests a cache invalidation or refresh endpoint, implying the weather data may be precomputed or cached server-side to reduce fetch cost and latency.
   - In the diagram, treat these as the backend edge that feeds the client with weather data and cache control.

7. **Weather visualization subsystem**
   - `src/components/map/MapView.tsx` renders the core map surface.
   - `src/components/map/Legend.tsx` explains the active color scale for the selected weather layer.
   - `src/utils/colorScales.ts` provides the mapping from numeric weather values to display colors.
   - This subsystem is responsible for turning grid data into an interpretable overlay.

8. **Time navigation subsystem**
   - `src/components/timeline/TimelineBar.tsx` and `src/utils/timeline.ts` handle temporal navigation.
   - This is likely how users move between forecast snapshots or observation times.
   - The timeline is a first-class input into data selection, so it drives what the map requests or renders.

9. **Layer selection subsystem**
   - `src/components/layout/LayerSwitcher.tsx` and `src/constants/layers.ts` define the available weather layers.
   - This is the user-facing control for switching between datasets such as temperature, wind, precipitation, etc. without changing the rest of the UI.
   - It is another key input into the data-fetch/render pipeline.

10. **Data orchestration hook**
   - `src/hooks/useWeatherLayer.ts` likely ties together:
     - the selected layer,
     - selected time,
     - API fetches,
     - store updates,
     - loading/error state.
   - This hook is the bridge between UI interactions and weather data retrieval, and is a good place to show the app’s reactive data flow.

11. **Types and shared utilities**
   - `src/types/weather.ts` defines the domain model for weather payloads and grid data.
   - `src/utils/mockData.ts` suggests a fallback or development-time data source.
   - `src/utils/timeline.ts` and `src/utils/colorScales.ts` are pure logic helpers that keep rendering code simpler and more deterministic.

12. **UI shell and styling**
   - `src/components/layout/Header.tsx` provides the top-level branding/navigation shell.
   - Styling is handled with **Tailwind CSS** plus `src/index.css`, `tailwind.config.ts`, and `postcss.config.js`.
   - These are presentation concerns, separate from the weather data pipeline.

13. **Operational/deployment clue**
   - The presence of an `api/` directory alongside a Vite client strongly suggests a deployment model where the static frontend is paired with serverless API routes.
   - For an architecture diagram, show the browser client calling the API layer directly rather than going through a large standalone backend.

14. **Key end-to-end flow**
   - User interaction starts in the React UI, updates shared app state, triggers the weather hook/client to fetch or refresh data, receives grid data from the API, and then the map/legend/timeline components render the result using shared color and timeline utilities.

Main entry points: [`src/hooks/useWeatherLayer.ts`](https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/hooks/useWeatherLayer.ts) (Weather hook), [`src/App.tsx`](https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/App.tsx) (App shell), [`src/components/map/MapView.tsx`](https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/components/map/MapView.tsx) (Map view), [`src/api/weatherClient.ts`](https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/api/weatherClient.ts) (Weather client)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_client["Browser client"]
  node_main["App entry<br/>bootstrap<br/>[main.tsx]"]
  node_app["App shell<br/>ui composition<br/>[App.tsx]"]
  node_header["Header<br/>layout ui<br/>[Header.tsx]"]
  node_layer_switcher["Layer switcher<br/>control ui<br/>[LayerSwitcher.tsx]"]
  node_map_view["Map view<br/>visualization<br/>[MapView.tsx]"]
  node_legend["Legend<br/>visualization aid<br/>[Legend.tsx]"]
  node_timeline_bar["Timeline<br/>time control<br/>[TimelineBar.tsx]"]
  node_weather_hook["Weather hook<br/>data orchestration<br/>[useWeatherLayer.ts]"]
  node_weather_client["Weather client<br/>api adapter<br/>[weatherClient.ts]"]
end

subgraph group_server["API layer"]
  node_weather_grid_api["Grid API<br/>serverless endpoint<br/>[weather-grid.ts]"]
  node_refresh_cache_api["Refresh cache<br/>serverless endpoint<br/>[refresh-cache.ts]"]
end

subgraph group_shared["Shared logic"]
  node_app_store[("App store<br/>state hub<br/>[appStore.ts]")]
  node_layers["Layer defs<br/>domain constants<br/>[layers.ts]"]
  node_weather_types["Weather types<br/>domain model<br/>[weather.ts]"]
  node_color_scales["Color scales<br/>render logic<br/>[colorScales.ts]"]
  node_timeline_utils["Timeline utils<br/>render logic<br/>[timeline.ts]"]
  node_mock_data["Mock data<br/>fallback data<br/>[mockData.ts]"]
end

node_main -->|"mounts"| node_app
node_app -->|"composes"| node_header
node_app -->|"composes"| node_layer_switcher
node_app -->|"composes"| node_map_view
node_app -->|"composes"| node_legend
node_app -->|"composes"| node_timeline_bar
node_layer_switcher -->|"reads"| node_layers
node_timeline_bar -->|"uses"| node_timeline_utils
node_map_view -->|"uses"| node_color_scales
node_map_view -->|"consumes"| node_weather_types
node_legend -->|"explains"| node_color_scales
node_weather_hook -->|"updates"| node_app_store
node_weather_hook -->|"fetches"| node_weather_client
node_weather_hook -->|"depends on"| node_layers
node_weather_hook -->|"depends on"| node_timeline_utils
node_weather_hook -->|"fallbacks to"| node_mock_data
node_weather_client -->|"calls"| node_weather_grid_api
node_weather_client -->|"refreshes"| node_refresh_cache_api
node_weather_grid_api -->|"returns"| node_weather_types
node_weather_hook -->|"feeds"| node_map_view
node_weather_hook -->|"feeds"| node_legend
node_weather_hook -->|"syncs"| node_timeline_bar
node_weather_hook -->|"syncs"| node_layer_switcher

click node_main "https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/main.tsx"
click node_app "https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/App.tsx"
click node_header "https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/components/layout/Header.tsx"
click node_layer_switcher "https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/components/layout/LayerSwitcher.tsx"
click node_map_view "https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/components/map/MapView.tsx"
click node_legend "https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/components/map/Legend.tsx"
click node_timeline_bar "https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/components/timeline/TimelineBar.tsx"
click node_weather_hook "https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/hooks/useWeatherLayer.ts"
click node_weather_client "https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/api/weatherClient.ts"
click node_app_store "https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/store/appStore.ts"
click node_layers "https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/constants/layers.ts"
click node_weather_types "https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/types/weather.ts"
click node_color_scales "https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/utils/colorScales.ts"
click node_timeline_utils "https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/utils/timeline.ts"
click node_mock_data "https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/utils/mockData.ts"
click node_weather_grid_api "https://github.com/bodhijain9425-debug/weatherwala/blob/main/api/weather-grid.ts"
click node_refresh_cache_api "https://github.com/bodhijain9425-debug/weatherwala/blob/main/api/refresh-cache.ts"

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_main,node_app,node_header,node_layer_switcher,node_map_view,node_legend,node_timeline_bar,node_weather_hook,node_weather_client toneBlue
class node_weather_grid_api,node_refresh_cache_api toneAmber
class node_app_store,node_layers,node_weather_types,node_color_scales,node_timeline_utils,node_mock_data toneMint
```

## Components

### Browser client

Vite React app under src/.

- [App entry](https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/main.tsx): bootstrap · Bootstraps the React application. · `src/main.tsx`
- [App shell](https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/App.tsx): ui composition · Assembles the primary screen and wires together the main panels. · `src/App.tsx`
- [Header](https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/components/layout/Header.tsx): layout ui · Top-level branding and shell area. · `src/components/layout/Header.tsx`
- [Layer switcher](https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/components/layout/LayerSwitcher.tsx): control ui · Lets the user choose the active weather layer. · `src/components/layout/LayerSwitcher.tsx`
- [Map view](https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/components/map/MapView.tsx): visualization · Renders the weather overlay on the map surface. · `src/components/map/MapView.tsx`
- [Legend](https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/components/map/Legend.tsx): visualization aid · Explains the active color scale for the selected layer. · `src/components/map/Legend.tsx`
- [Timeline](https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/components/timeline/TimelineBar.tsx): time control · Navigates across forecast or observation times. · `src/components/timeline/TimelineBar.tsx`
- [Weather hook](https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/hooks/useWeatherLayer.ts): data orchestration · Coordinates selected layer, time, fetching, and store updates. · `src/hooks/useWeatherLayer.ts`
- [Weather client](https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/api/weatherClient.ts): api adapter · Client-side boundary for calling weather endpoints. · `src/api/weatherClient.ts`

### API layer

Serverless endpoints under api/.

- [Grid API](https://github.com/bodhijain9425-debug/weatherwala/blob/main/api/weather-grid.ts): serverless endpoint · Serves weather grid payloads to the client. · `api/weather-grid.ts`
- [Refresh cache](https://github.com/bodhijain9425-debug/weatherwala/blob/main/api/refresh-cache.ts): serverless endpoint · Invalidates or refreshes cached weather data. · `api/refresh-cache.ts`

### Shared logic

Domain models, utilities, and state shared across the client.

- [App store](https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/store/appStore.ts): state hub · Central shared state for the selected layer, time, and loading data. · `src/store/appStore.ts`
- [Layer defs](https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/constants/layers.ts): domain constants · Defines the available weather layers. · `src/constants/layers.ts`
- [Weather types](https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/types/weather.ts): domain model · Type definitions for weather payloads and grid data. · `src/types/weather.ts`
- [Color scales](https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/utils/colorScales.ts): render logic · Maps weather values to display colors. · `src/utils/colorScales.ts`
- [Timeline utils](https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/utils/timeline.ts): render logic · Pure helpers for time navigation and frame selection. · `src/utils/timeline.ts`
- [Mock data](https://github.com/bodhijain9425-debug/weatherwala/blob/main/src/utils/mockData.ts): fallback data · Development or fallback weather dataset. · `src/utils/mockData.ts`

## Connections

- App entry → App shell: mounts · The entry point renders the application shell.
- App shell → Header: composes · The shell includes the header area.
- App shell → Layer switcher: composes · The shell includes the layer control.
- App shell → Map view: composes · The shell includes the core map visualization.
- App shell → Legend: composes · The shell includes the legend panel.
- App shell → Timeline: composes · The shell includes the time navigation control.
- Layer switcher → Layer defs: reads · Layer choices are defined centrally.
- Timeline → Timeline utils: uses · Time navigation is driven by shared helper logic.
- Map view → Color scales: uses · The map overlay uses color mapping for display.
- Map view → Weather types: consumes · Map rendering depends on the weather data model.
- Legend → Color scales: explains · The legend mirrors the active scale.
- Weather hook → App store: updates · The hook coordinates and writes shared UI state.
- Weather hook → Weather client: fetches · The hook requests weather data through the client adapter.
- Weather hook → Layer defs: depends on · The active layer drives requests and state.
- Weather hook → Timeline utils: depends on · The selected time/frame is derived from timeline helpers.
- Weather hook → Mock data: fallbacks to · Local data can stand in when live data is unavailable.
- Weather client → Grid API: calls · The client fetches grid payloads from the API layer.
- Weather client → Refresh cache: refreshes · The client can trigger cache invalidation or refresh.
- Grid API → Weather types: returns · API payloads conform to the shared weather model.
- Weather hook → Map view: feeds · Fetched weather state drives the map rendering.
- Weather hook → Legend: feeds · Selected weather data also drives the legend.
- Weather hook → Timeline: syncs · Timeline selection stays in sync with fetched state.
- Weather hook → Layer switcher: syncs · Layer selection stays in sync with fetched state.