# udaychand348/expense-tracker-frontend architecture

> Architecture diagram of the GitHub repository udaychand348/expense-tracker-frontend, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-11-13). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/udaychand348/expense-tracker-frontend
- Repository: https://github.com/udaychand348/expense-tracker-frontend

## Overview

This is a React expense-tracking application with signup, OTP verification, login, profile/logout, and expense entry, listing, editing, and deletion. The active entry point mounts App4, which references the main app and its context provider; the main app routes users to the screens. Auth and expense screens make direct HTTP requests to a backend at localhost:8079. A separate Redux counter example is present but appears unmounted. Some connections are omitted where only unsampled modules could establish their behavior.

Main entry points: [`src/App.js`](https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/App.js) (Router and Navigation), [`src/context/Mycontext.js`](https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/context/Mycontext.js) (Session Context), [`src/expcomponents/DisplayExpenses.js`](https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/expcomponents/DisplayExpenses.js) (Expense List), [`src/expcomponents/UpdateExpense.js`](https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/expcomponents/UpdateExpense.js) (Edit Expense)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_shell["App Shell"]
  node_entry["React Entry<br/>[index.js]"]
  node_app4["App Wrapper<br/>[App4.js]"]
  node_app["Router and Navigation<br/>[App.js]"]
  node_context["Session Context<br/>[Mycontext.js]"]
end

subgraph group_identity["Account Access"]
  node_signup["Signup<br/>[Signup.js]"]
  node_otp["OTP Verification<br/>[Otpvalidate.js]"]
  node_login["Login<br/>[Login.js]"]
  node_logout["Logout<br/>[Logout.js]"]
  node_home["Home Screen<br/>[Home.js]"]
  node_profile["Profile<br/>[Profile.js]"]
end

subgraph group_expenses["Expense Tracking"]
  node_add["Add Expense<br/>[Adddata.js]"]
  node_display["Expense List<br/>[DisplayExpenses.js]"]
  node_update["Edit Expense<br/>[UpdateExpense.js]"]
end

subgraph group_redux["Redux Example"]
  node_counter["Counter UI<br/>[App2.js]"]
  node_actions["Counter Actions<br/>[Action.js]"]
  node_store["Redux Store<br/>[Store.js]"]
  node_reducer["Counter Reducer<br/>[Reducer.js]"]
end

node_user(("User"))
node_browserstore[("Browser Storage")]
node_backend{{"Expense API"}}

node_user -->|"opens app"| node_entry
node_entry -->|"mounts"| node_app4
node_app4 -->|"uses"| node_app
node_app4 -->|"provides state"| node_context
node_app -->|"routes to"| node_signup
node_app -->|"routes to"| node_otp
node_app -->|"routes to"| node_login
node_app -->|"routes to"| node_logout
node_app -->|"routes to"| node_home
node_app -->|"routes to"| node_profile
node_app -->|"routes to"| node_add
node_app -->|"routes to"| node_display
node_app -->|"routes to"| node_update
node_app -->|"reads session"| node_context
node_context -->|"persists session"| node_browserstore
node_signup -->|"sets email"| node_context
node_signup -->|"registers user"| node_backend
node_otp -->|"reads email"| node_context
node_otp -->|"sends and verifies"| node_backend
node_login -->|"authenticates"| node_backend
node_login -->|"sets session"| node_context
node_logout -.->|"clears session"| node_context
node_add -->|"reads token"| node_context
node_add -->|"creates expense"| node_backend
node_display -->|"reads token"| node_context
node_display -->|"lists and deletes"| node_backend
node_display -->|"navigates to edit"| node_update
node_update -->|"reads token"| node_context
node_update -->|"fetches and updates"| node_backend
node_counter -->|"dispatches actions"| node_actions
node_store -->|"configures reducer"| node_reducer

click node_entry "https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/index.js"
click node_app4 "https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/App4.js"
click node_app "https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/App.js"
click node_context "https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/context/Mycontext.js"
click node_signup "https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/components/Signup.js"
click node_otp "https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/components/Otpvalidate.js"
click node_login "https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/components/Login.js"
click node_logout "https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/components/Logout.js"
click node_home "https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/components/Home.js"
click node_profile "https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/components/Profile.js"
click node_add "https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/expcomponents/Adddata.js"
click node_display "https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/expcomponents/DisplayExpenses.js"
click node_update "https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/expcomponents/UpdateExpense.js"
click node_counter "https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/ReactReudx/App2.js"
click node_actions "https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/ReactReudx/Action.js"
click node_store "https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/ReactReudx/Store.js"
click node_reducer "https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/ReactReudx/Reducer.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_entry,node_app4,node_app,node_context,node_user toneBlue
class node_signup,node_otp,node_login,node_logout,node_home,node_profile,node_browserstore toneAmber
class node_add,node_display,node_update,node_backend toneMint
class node_counter,node_actions,node_store,node_reducer toneRose
```

## Components

### App Shell

- [React Entry](https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/index.js): `src/index.js`
- [App Wrapper](https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/App4.js): `src/App4.js`
- [Router and Navigation](https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/App.js): `src/App.js`
- [Session Context](https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/context/Mycontext.js): `src/context/Mycontext.js`

### Account Access

- [Signup](https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/components/Signup.js): `src/components/Signup.js`
- [OTP Verification](https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/components/Otpvalidate.js): `src/components/Otpvalidate.js`
- [Login](https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/components/Login.js): `src/components/Login.js`
- [Logout](https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/components/Logout.js): `src/components/Logout.js`
- [Home Screen](https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/components/Home.js): `src/components/Home.js`
- [Profile](https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/components/Profile.js): `src/components/Profile.js`

### Expense Tracking

- [Add Expense](https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/expcomponents/Adddata.js): `src/expcomponents/Adddata.js`
- [Expense List](https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/expcomponents/DisplayExpenses.js): `src/expcomponents/DisplayExpenses.js`
- [Edit Expense](https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/expcomponents/UpdateExpense.js): `src/expcomponents/UpdateExpense.js`

### Redux Example

- [Counter UI](https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/ReactReudx/App2.js): `src/ReactReudx/App2.js`
- [Counter Actions](https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/ReactReudx/Action.js): `src/ReactReudx/Action.js`
- [Redux Store](https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/ReactReudx/Store.js): `src/ReactReudx/Store.js`
- [Counter Reducer](https://github.com/udaychand348/expense-tracker-frontend/blob/master/src/ReactReudx/Reducer.js): `src/ReactReudx/Reducer.js`

### Other components

- **User**
- **Browser Storage**
- **Expense API**

## Connections

- User → React Entry: opens app (evidence: `src/index.js`)
- React Entry → App Wrapper: mounts (evidence: `src/index.js`)
- App Wrapper → Router and Navigation: uses (evidence: `src/App4.js`)
- App Wrapper → Session Context: provides state (evidence: `src/App4.js`)
- Router and Navigation → Signup: routes to (evidence: `src/App.js`)
- Router and Navigation → OTP Verification: routes to (evidence: `src/App.js`)
- Router and Navigation → Login: routes to (evidence: `src/App.js`)
- Router and Navigation → Logout: routes to (evidence: `src/App.js`)
- Router and Navigation → Home Screen: routes to (evidence: `src/App.js`)
- Router and Navigation → Profile: routes to (evidence: `src/App.js`)
- Router and Navigation → Add Expense: routes to (evidence: `src/App.js`)
- Router and Navigation → Expense List: routes to (evidence: `src/App.js`)
- Router and Navigation → Edit Expense: routes to (evidence: `src/App.js`)
- Router and Navigation → Session Context: reads session (evidence: `src/App.js`)
- Session Context → Browser Storage: persists session (evidence: `src/context/Mycontext.js`)
- Signup → Session Context: sets email (evidence: `src/components/Signup.js`)
- Signup → Expense API: registers user (evidence: `src/components/Signup.js`)
- OTP Verification → Session Context: reads email (evidence: `src/components/Otpvalidate.js`)
- OTP Verification → Expense API: sends and verifies (evidence: `src/components/Otpvalidate.js`)
- Login → Expense API: authenticates (evidence: `src/components/Login.js`)
- Login → Session Context: sets session (evidence: `src/App.js`)
- Logout → Session Context: clears session
- Add Expense → Session Context: reads token (evidence: `src/expcomponents/Adddata.js`)
- Add Expense → Expense API: creates expense (evidence: `src/expcomponents/Adddata.js`)
- Expense List → Session Context: reads token (evidence: `src/expcomponents/DisplayExpenses.js`)
- Expense List → Expense API: lists and deletes (evidence: `src/expcomponents/DisplayExpenses.js`)
- Expense List → Edit Expense: navigates to edit (evidence: `src/expcomponents/DisplayExpenses.js`)
- Edit Expense → Session Context: reads token (evidence: `src/expcomponents/UpdateExpense.js`)
- Edit Expense → Expense API: fetches and updates (evidence: `src/expcomponents/UpdateExpense.js`)
- Counter UI → Counter Actions: dispatches actions (evidence: `src/ReactReudx/App2.js`)
- Redux Store → Counter Reducer: configures reducer (evidence: `src/ReactReudx/Store.js`)