# cs-optima-inc/timesheet-app architecture

> Architecture diagram of the GitHub repository cs-optima-inc/timesheet-app, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-08-13). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/cs-optima-inc/timesheet-app
- Repository: https://github.com/cs-optima-inc/timesheet-app

## Overview

#### Purpose and Runtime
This is a Vite-served React + TypeScript single-page workforce/employee self-service UI. Its feature surface covers dashboard reporting, attendance and time punching, timesheets, leave requests, expense claims, and entry forms. The repository README is the stock Vite template, so domain behavior is inferred from the application structure. Browser execution starts from `index.html`, then `src/main.tsx`.

#### Application Composition
`src/main.tsx` mounts the React tree; `src/App.tsx` is the likely application shell and top-level page composition point. Global presentation is centralized in `src/styles.css`. Shared navigation and session controls belong in `src/components/Header.tsx` and `src/components/LogoutButton.tsx`, establishing a reusable chrome around feature pages.

#### Authentication Boundary
Authentication is isolated under `src/auth/AuthProvider.tsx`, which likely exposes authenticated-user/session state to the component tree. `src/auth/amplifyConfig.ts` is the AWS Amplify integration/configuration boundary. `src/pages/Login.tsx` is the unauthenticated entry surface; protected feature rendering should be gated through the provider/application shell rather than individual API calls.

#### API Boundary
`src/api/client.ts` is the central frontend-to-backend service boundary. Feature pages should consume remote data and submit mutations through this client rather than embedding transport logic. The backend itself is not present in this repository; AWS Amplify is the only explicit external cloud/auth integration indicated by the tree.

#### Workforce Feature Pages
The primary application stages are represented by page-level modules:
- Landing/home: `src/pages/Home.tsx`
- Operational overview: `src/pages/Dashboard.tsx`
- Attendance and punch capture: `src/pages/Attendance.tsx`, `src/components/TimePunch.tsx`
- Timesheet review/listing: `src/pages/TimesheetList.tsx`
- Employee submissions: `src/pages/LeaveRequest.tsx`, `src/pages/ExpenseClaim.tsx`, `src/pages/EntryForm.tsx`

These pages form the feature boundary: they coordinate user input, authenticated state, API operations, and presentation components.

#### Reporting and Visualization
Dashboard-oriented visualizations are componentized rather than embedded in pages: `src/components/AreaChart.tsx`, `src/components/PieChart.tsx`, and `src/components/Sparkline.tsx`. `src/pages/Dashboard.tsx` is expected to assemble these from API-derived metrics, keeping chart rendering separate from data acquisition and page layout.

#### Build and Delivery
Vite provides development serving, HMR, and production bundling through `vite.config.ts`; React runs in the browser with TypeScript source compilation. Package/dependency resolution is defined by `package.json` and `package-lock.json`. Static public assets, if any, are served from `public`.

Main entry points: [`src/App.tsx`](https://github.com/cs-optima-inc/timesheet-app/blob/main/src/App.tsx) (Application shell), [`src/main.tsx`](https://github.com/cs-optima-inc/timesheet-app/blob/main/src/main.tsx) (React bootstrap), [`src/api/client.ts`](https://github.com/cs-optima-inc/timesheet-app/blob/main/src/api/client.ts) (API client), [`src/pages/Dashboard.tsx`](https://github.com/cs-optima-inc/timesheet-app/blob/main/src/pages/Dashboard.tsx) (Dashboard)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_runtime["Browser runtime"]
  node_index["HTML entry<br/>HTML document<br/>[index.html]"]
  node_main["React bootstrap<br/>React entry<br/>[main.tsx]"]
  node_app["Application shell<br/>React composition<br/>[App.tsx]"]
  node_styles["Global styles<br/>CSS<br/>[styles.css]"]
  node_api{{"API client<br/>frontend service boundary<br/>[client.ts]"}}
end

subgraph group_auth["Authentication"]
  node_auth_provider["Auth provider<br/>session state<br/>[AuthProvider.tsx]"]
  node_login["Login<br/>unauthenticated page<br/>[Login.tsx]"]
  node_amplify{{"AWS Amplify<br/>cloud auth integration<br/>[amplifyConfig.ts]"}}
end

subgraph group_features["Workforce features"]
  node_home["Home<br/>landing page<br/>[Home.tsx]"]
  node_dashboard["Dashboard<br/>reporting page<br/>[Dashboard.tsx]"]
  node_attendance["Attendance<br/>[Attendance.tsx]"]
  node_time_punch["Time punch<br/>attendance input<br/>[TimePunch.tsx]"]
  node_timesheets["Timesheets<br/>review page<br/>[TimesheetList.tsx]"]
  node_submissions["Employee submissions<br/>submission pages"]
end

subgraph group_shared["Shared UI"]
  node_header["Header<br/>shared navigation<br/>[Header.tsx]"]
  node_logout["Logout control<br/>session control<br/>[LogoutButton.tsx]"]
  node_charts["Charts<br/>visualization components"]
end

subgraph group_delivery["Build and delivery"]
  node_vite["Vite build<br/>dev server and bundler<br/>[vite.config.ts]"]
  node_packages["Dependencies<br/>package manifest<br/>[package.json]"]
  node_public["Public assets<br/>static assets"]
end

node_index -->|"loads"| node_main
node_main -->|"mounts"| node_app
node_main -->|"applies"| node_styles
node_app -->|"uses session"| node_auth_provider
node_app -->|"renders chrome"| node_header
node_app -->|"shows when unauthenticated"| node_login
node_auth_provider -->|"configures auth through"| node_amplify
node_header -->|"includes"| node_logout
node_app -->|"routes to"| node_home
node_app -->|"routes to"| node_dashboard
node_app -->|"routes to"| node_attendance
node_app -->|"routes to"| node_timesheets
node_app -->|"routes to"| node_submissions
node_attendance -->|"uses"| node_time_punch
node_dashboard -->|"renders"| node_charts
node_dashboard -->|"loads metrics"| node_api
node_attendance -->|"records attendance"| node_api
node_timesheets -->|"loads timesheets"| node_api
node_submissions -->|"submits requests"| node_api
node_vite -->|"serves and bundles"| node_main
node_packages -.->|"defines tooling"| node_vite
node_public -->|"served by"| node_vite

click node_index "https://github.com/cs-optima-inc/timesheet-app/blob/main/index.html"
click node_main "https://github.com/cs-optima-inc/timesheet-app/blob/main/src/main.tsx"
click node_app "https://github.com/cs-optima-inc/timesheet-app/blob/main/src/App.tsx"
click node_styles "https://github.com/cs-optima-inc/timesheet-app/blob/main/src/styles.css"
click node_auth_provider "https://github.com/cs-optima-inc/timesheet-app/blob/main/src/auth/AuthProvider.tsx"
click node_login "https://github.com/cs-optima-inc/timesheet-app/blob/main/src/pages/Login.tsx"
click node_amplify "https://github.com/cs-optima-inc/timesheet-app/blob/main/src/auth/amplifyConfig.ts"
click node_api "https://github.com/cs-optima-inc/timesheet-app/blob/main/src/api/client.ts"
click node_header "https://github.com/cs-optima-inc/timesheet-app/blob/main/src/components/Header.tsx"
click node_logout "https://github.com/cs-optima-inc/timesheet-app/blob/main/src/components/LogoutButton.tsx"
click node_home "https://github.com/cs-optima-inc/timesheet-app/blob/main/src/pages/Home.tsx"
click node_dashboard "https://github.com/cs-optima-inc/timesheet-app/blob/main/src/pages/Dashboard.tsx"
click node_attendance "https://github.com/cs-optima-inc/timesheet-app/blob/main/src/pages/Attendance.tsx"
click node_time_punch "https://github.com/cs-optima-inc/timesheet-app/blob/main/src/components/TimePunch.tsx"
click node_timesheets "https://github.com/cs-optima-inc/timesheet-app/blob/main/src/pages/TimesheetList.tsx"
click node_vite "https://github.com/cs-optima-inc/timesheet-app/blob/main/vite.config.ts"
click node_packages "https://github.com/cs-optima-inc/timesheet-app/blob/main/package.json"
click node_public "https://github.com/cs-optima-inc/timesheet-app/tree/main/public"

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,node_main,node_app,node_styles,node_api toneBlue
class node_auth_provider,node_login,node_amplify toneAmber
class node_home,node_dashboard,node_attendance,node_time_punch,node_timesheets,node_submissions toneMint
class node_header,node_logout,node_charts toneRose
class node_vite,node_packages,node_public toneIndigo
```

## Components

### Browser runtime

- [HTML entry](https://github.com/cs-optima-inc/timesheet-app/blob/main/index.html): HTML document · `index.html`
- [React bootstrap](https://github.com/cs-optima-inc/timesheet-app/blob/main/src/main.tsx): React entry · `src/main.tsx`
- [Application shell](https://github.com/cs-optima-inc/timesheet-app/blob/main/src/App.tsx): React composition · Composes authenticated pages and shared chrome. · `src/App.tsx`
- [Global styles](https://github.com/cs-optima-inc/timesheet-app/blob/main/src/styles.css): CSS · `src/styles.css`
- [API client](https://github.com/cs-optima-inc/timesheet-app/blob/main/src/api/client.ts): frontend service boundary · Centralizes backend requests and mutations. · `src/api/client.ts`

### Authentication

- [Auth provider](https://github.com/cs-optima-inc/timesheet-app/blob/main/src/auth/AuthProvider.tsx): session state · Gates protected application rendering. · `src/auth/AuthProvider.tsx`
- [Login](https://github.com/cs-optima-inc/timesheet-app/blob/main/src/pages/Login.tsx): unauthenticated page · `src/pages/Login.tsx`
- [AWS Amplify](https://github.com/cs-optima-inc/timesheet-app/blob/main/src/auth/amplifyConfig.ts): cloud auth integration · `src/auth/amplifyConfig.ts`

### Workforce features

- [Home](https://github.com/cs-optima-inc/timesheet-app/blob/main/src/pages/Home.tsx): landing page · `src/pages/Home.tsx`
- [Dashboard](https://github.com/cs-optima-inc/timesheet-app/blob/main/src/pages/Dashboard.tsx): reporting page · Assembles API-derived metrics and visualizations. · `src/pages/Dashboard.tsx`
- [Attendance](https://github.com/cs-optima-inc/timesheet-app/blob/main/src/pages/Attendance.tsx): attendance page · `src/pages/Attendance.tsx`
- [Time punch](https://github.com/cs-optima-inc/timesheet-app/blob/main/src/components/TimePunch.tsx): attendance input · `src/components/TimePunch.tsx`
- [Timesheets](https://github.com/cs-optima-inc/timesheet-app/blob/main/src/pages/TimesheetList.tsx): review page · `src/pages/TimesheetList.tsx`
- **Employee submissions**: submission pages · Leave requests, expense claims, and entry forms.

### Shared UI

- [Header](https://github.com/cs-optima-inc/timesheet-app/blob/main/src/components/Header.tsx): shared navigation · `src/components/Header.tsx`
- [Logout control](https://github.com/cs-optima-inc/timesheet-app/blob/main/src/components/LogoutButton.tsx): session control · `src/components/LogoutButton.tsx`
- **Charts**: visualization components · Area, pie, and sparkline renderers.

### Build and delivery

- [Vite build](https://github.com/cs-optima-inc/timesheet-app/blob/main/vite.config.ts): dev server and bundler · `vite.config.ts`
- [Dependencies](https://github.com/cs-optima-inc/timesheet-app/blob/main/package.json): package manifest · `package.json`
- [Public assets](https://github.com/cs-optima-inc/timesheet-app/tree/main/public): static assets · `public`

## Connections

- HTML entry → React bootstrap: loads
- React bootstrap → Application shell: mounts
- React bootstrap → Global styles: applies
- Application shell → Auth provider: uses session
- Application shell → Header: renders chrome
- Application shell → Login: shows when unauthenticated
- Auth provider → AWS Amplify: configures auth through
- Header → Logout control: includes
- Application shell → Home: routes to
- Application shell → Dashboard: routes to
- Application shell → Attendance: routes to
- Application shell → Timesheets: routes to
- Application shell → Employee submissions: routes to
- Attendance → Time punch: uses
- Dashboard → Charts: renders
- Dashboard → API client: loads metrics
- Attendance → API client: records attendance
- Timesheets → API client: loads timesheets
- Employee submissions → API client: submits requests
- Vite build → React bootstrap: serves and bundles
- Dependencies → Vite build: defines tooling
- Public assets → Vite build: served by