# arnab3339/candidate-form-details-service architecture

> Architecture diagram of the GitHub repository arnab3339/candidate-form-details-service, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-09-30). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/arnab3339/candidate-form-details-service
- Repository: https://github.com/arnab3339/candidate-form-details-service

## Overview

This is a small Express service named candidate-form-details-service. The demonstrated user workflow is an HTTP client calling the versioned ping endpoint and receiving a Pong response; the server adds correlation context and routes the request to its handler. The tree and source index also show database configuration/models and validators, but the available excerpts do not establish their runtime connections or broader business capabilities, so those are shown without inferred links.

Main entry points: [`src/server.ts`](https://github.com/arnab3339/candidate-form-details-service/blob/main/src/server.ts) (Express server), [`src/configs/logger.config.ts`](https://github.com/arnab3339/candidate-form-details-service/blob/main/src/configs/logger.config.ts) (Logger), [`src/routes/index.ts`](https://github.com/arnab3339/candidate-form-details-service/blob/main/src/routes/index.ts) (API router), [`src/routes/v1/index.ts`](https://github.com/arnab3339/candidate-form-details-service/blob/main/src/routes/v1/index.ts) (Version 1 router)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_runtime["HTTP runtime"]
  node_server["Express server<br/>[server.ts]"]
  node_api_router["API router<br/>[index.ts]"]
  node_v1_router["Version 1 router<br/>[index.ts]"]
  node_ping_route["Ping route<br/>[ping.route.ts]"]
  node_ping_handler["Ping handler<br/>[ping.controller.ts]"]
  node_error_handlers["Error handlers"]
  node_app_errors["Application errors<br/>[app.error.ts]"]
  node_server_config["Server config<br/>[server.config.ts]"]
end

subgraph group_observability["Request observability"]
  node_correlation_middleware["Correlation middleware"]
  node_request_context["Request context<br/>[request.helper.ts]"]
  node_logger["Logger<br/>[logger.config.ts]"]
end

subgraph group_data["Data and validation"]
  node_db_config["Database config<br/>[db.config.js]"]
  node_sequelize_config["Sequelize config"]
  node_models["Database models<br/>[index.js]"]
  node_validator_registry["Validator registry<br/>[index.ts]"]
  node_ping_validator["Ping validator<br/>[ping.validator.ts]"]
end

node_client(("HTTP client"))

node_client -->|"sends request"| node_server
node_server -->|"registers middleware"| node_correlation_middleware
node_server -->|"mounts API"| node_api_router
node_server -->|"registers handlers"| node_error_handlers
node_server -->|"reads port"| node_server_config
node_server -->|"logs startup"| node_logger
node_api_router -->|"mounts version"| node_v1_router
node_v1_router -->|"mounts ping"| node_ping_route
node_ping_route -->|"dispatches request"| node_ping_handler
node_ping_handler -->|"logs request"| node_logger
node_correlation_middleware -->|"stores correlation ID"| node_request_context
node_logger -->|"reads correlation ID"| node_request_context
node_error_handlers -->|"uses error type"| node_app_errors
node_sequelize_config -->|"loads config"| node_db_config

click node_server "https://github.com/arnab3339/candidate-form-details-service/blob/main/src/server.ts"
click node_api_router "https://github.com/arnab3339/candidate-form-details-service/blob/main/src/routes/index.ts"
click node_v1_router "https://github.com/arnab3339/candidate-form-details-service/blob/main/src/routes/v1/index.ts"
click node_ping_route "https://github.com/arnab3339/candidate-form-details-service/blob/main/src/routes/v1/ping.route.ts"
click node_ping_handler "https://github.com/arnab3339/candidate-form-details-service/blob/main/src/controllers/ping.controller.ts"
click node_error_handlers "https://github.com/arnab3339/candidate-form-details-service/blob/main/src/middlewares/error.middleware.ts"
click node_app_errors "https://github.com/arnab3339/candidate-form-details-service/blob/main/src/utils/errors/app.error.ts"
click node_server_config "https://github.com/arnab3339/candidate-form-details-service/blob/main/src/configs/server.config.ts"
click node_correlation_middleware "https://github.com/arnab3339/candidate-form-details-service/blob/main/src/middlewares/correlation.middleware.ts"
click node_request_context "https://github.com/arnab3339/candidate-form-details-service/blob/main/src/utils/helpers/request.helper.ts"
click node_logger "https://github.com/arnab3339/candidate-form-details-service/blob/main/src/configs/logger.config.ts"
click node_db_config "https://github.com/arnab3339/candidate-form-details-service/blob/main/src/configs/db.config.js"
click node_sequelize_config "https://github.com/arnab3339/candidate-form-details-service/blob/main/src/configs/sequelize.config.js"
click node_models "https://github.com/arnab3339/candidate-form-details-service/blob/main/src/db/models/index.js"
click node_validator_registry "https://github.com/arnab3339/candidate-form-details-service/blob/main/src/validators/index.ts"
click node_ping_validator "https://github.com/arnab3339/candidate-form-details-service/blob/main/src/validators/ping.validator.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_server,node_api_router,node_v1_router,node_ping_route,node_ping_handler,node_error_handlers,node_app_errors,node_server_config,node_client toneBlue
class node_correlation_middleware,node_request_context,node_logger toneAmber
class node_db_config,node_sequelize_config,node_models,node_validator_registry,node_ping_validator toneMint
```

## Components

### HTTP runtime

- [Express server](https://github.com/arnab3339/candidate-form-details-service/blob/main/src/server.ts): `src/server.ts`
- [API router](https://github.com/arnab3339/candidate-form-details-service/blob/main/src/routes/index.ts): `src/routes/index.ts`
- [Version 1 router](https://github.com/arnab3339/candidate-form-details-service/blob/main/src/routes/v1/index.ts): `src/routes/v1/index.ts`
- [Ping route](https://github.com/arnab3339/candidate-form-details-service/blob/main/src/routes/v1/ping.route.ts): `src/routes/v1/ping.route.ts`
- [Ping handler](https://github.com/arnab3339/candidate-form-details-service/blob/main/src/controllers/ping.controller.ts): `src/controllers/ping.controller.ts`
- [Error handlers](https://github.com/arnab3339/candidate-form-details-service/blob/main/src/middlewares/error.middleware.ts): `src/middlewares/error.middleware.ts`
- [Application errors](https://github.com/arnab3339/candidate-form-details-service/blob/main/src/utils/errors/app.error.ts): `src/utils/errors/app.error.ts`
- [Server config](https://github.com/arnab3339/candidate-form-details-service/blob/main/src/configs/server.config.ts): `src/configs/server.config.ts`

### Request observability

- [Correlation middleware](https://github.com/arnab3339/candidate-form-details-service/blob/main/src/middlewares/correlation.middleware.ts): `src/middlewares/correlation.middleware.ts`
- [Request context](https://github.com/arnab3339/candidate-form-details-service/blob/main/src/utils/helpers/request.helper.ts): `src/utils/helpers/request.helper.ts`
- [Logger](https://github.com/arnab3339/candidate-form-details-service/blob/main/src/configs/logger.config.ts): `src/configs/logger.config.ts`

### Data and validation

- [Database config](https://github.com/arnab3339/candidate-form-details-service/blob/main/src/configs/db.config.js): `src/configs/db.config.js`
- [Sequelize config](https://github.com/arnab3339/candidate-form-details-service/blob/main/src/configs/sequelize.config.js): `src/configs/sequelize.config.js`
- [Database models](https://github.com/arnab3339/candidate-form-details-service/blob/main/src/db/models/index.js): `src/db/models/index.js`
- [Validator registry](https://github.com/arnab3339/candidate-form-details-service/blob/main/src/validators/index.ts): `src/validators/index.ts`
- [Ping validator](https://github.com/arnab3339/candidate-form-details-service/blob/main/src/validators/ping.validator.ts): `src/validators/ping.validator.ts`

### Other components

- **HTTP client**

## Connections

- HTTP client → Express server: sends request (evidence: `src/server.ts`)
- Express server → Correlation middleware: registers middleware (evidence: `src/server.ts`)
- Express server → API router: mounts API (evidence: `src/server.ts`)
- Express server → Error handlers: registers handlers (evidence: `src/server.ts`)
- Express server → Server config: reads port (evidence: `src/server.ts`)
- Express server → Logger: logs startup (evidence: `src/server.ts`)
- API router → Version 1 router: mounts version (evidence: `src/routes/index.ts`)
- Version 1 router → Ping route: mounts ping (evidence: `src/routes/v1/index.ts`)
- Ping route → Ping handler: dispatches request (evidence: `src/routes/v1/ping.route.ts`)
- Ping handler → Logger: logs request (evidence: `src/controllers/ping.controller.ts`)
- Correlation middleware → Request context: stores correlation ID (evidence: `src/middlewares/correlation.middleware.ts`)
- Logger → Request context: reads correlation ID (evidence: `src/configs/logger.config.ts`)
- Error handlers → Application errors: uses error type (evidence: `src/middlewares/error.middleware.ts`)
- Sequelize config → Database config: loads config (evidence: `src/configs/sequelize.config.js`)