# prasad066/candidateworkspace architecture

> Architecture diagram of the GitHub repository prasad066/candidateworkspace, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-11-15). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/prasad066/candidateworkspace
- Repository: https://github.com/prasad066/candidateworkspace

## Overview

Invoice Flow supports invoice intake through correction, three-way matching, exception handling, approval, and simulated payment readiness, with dashboard and read-only reference data. The React workspace calls the Express API; backend services implement workflow operations over MongoDB-backed domain models, while invoice source files are persisted separately. The repository also includes a standalone synthetic-data generator and evaluator. Some service implementations were not sampled, so those workflow links rely on the README; other edges use shown imports or SOURCE INDEX references.

Main entry points: [`backend/routes`](https://github.com/prasad066/candidateworkspace/tree/main/backend/routes) (API routing), [`frontend/src/App.jsx`](https://github.com/prasad066/candidateworkspace/blob/main/frontend/src/App.jsx) (Workspace and routing), [`frontend/src/services/api.js`](https://github.com/prasad066/candidateworkspace/blob/main/frontend/src/services/api.js) (API client), [`backend/controllers/invoiceIntakeController.js`](https://github.com/prasad066/candidateworkspace/blob/main/backend/controllers/invoiceIntakeController.js) (Intake handlers)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_frontend["Workflow UI"]
  node_workspace["Workspace and routing<br/>[App.jsx]"]
  node_intake_ui["Intake review<br/>[IntakesPage.jsx]"]
  node_exceptions_ui["Exception review<br/>[ExceptionsPage.jsx]"]
  node_approvals_ui["Approval decisions<br/>[ApprovalsPage.jsx]"]
  node_payments_ui["Payment readiness<br/>[PaymentsPage.jsx]"]
  node_dashboard_ui["Dashboard<br/>[DashboardPage.jsx]"]
  node_reference_ui["Reference views"]
  node_api_client["API client<br/>[api.js]"]
end

subgraph group_backend["Invoice Operations"]
  node_api_routes["API routing"]
  node_intake_controller["Intake handlers"]
  node_extraction["Structured extraction"]
  node_intake_service["Intake revisions"]
  node_source_storage["Source file storage"]
  node_matching["Three-way matching<br/>[matchingEngine.js]"]
  node_exceptions["Exception workflow"]
  node_approvals["Approval workflow<br/>[approvalService.js]"]
  node_payments["Payment readiness<br/>[paymentService.js]"]
  node_dashboard_service["Dashboard metrics"]
  node_reference_service["Reference data"]
end

subgraph group_platform["Identity and Data"]
  node_auth["Authentication<br/>[authService.js]"]
  node_auth_middleware["Request authentication<br/>[authentication.js]"]
  node_domain_models[("Workflow records")]
end

subgraph group_generator["Synthetic Data"]
  node_generator["Synthetic data generation<br/>[synthetic_data.py]"]
  node_generator_config["Generator configuration<br/>[config.py]"]
  node_dataset_validation["Dataset validation"]
  node_evaluation["Prediction evaluation<br/>[evaluate.py]"]
end

node_user(("Finance user"))
node_mongo[("MongoDB")]

node_user -->|"uses"| node_workspace
node_workspace -->|"routes to"| node_intake_ui
node_workspace -->|"routes to"| node_exceptions_ui
node_workspace -->|"routes to"| node_approvals_ui
node_workspace -->|"routes to"| node_payments_ui
node_workspace -->|"routes to"| node_dashboard_ui
node_workspace -->|"routes to"| node_reference_ui
node_intake_ui -->|"requests data"| node_api_client
node_intake_ui -->|"submits corrections"| node_api_client
node_exceptions_ui -->|"requests data"| node_api_client
node_approvals_ui -->|"requests data"| node_api_client
node_payments_ui -->|"requests data"| node_api_client
node_dashboard_ui -->|"requests data"| node_api_client
node_reference_ui -->|"requests data"| node_api_client
node_api_client -->|"calls API"| node_api_routes
node_api_routes -->|"dispatches intake"| node_intake_controller
node_intake_controller -->|"parses files"| node_extraction
node_intake_controller -->|"persists source"| node_source_storage
node_intake_controller -->|"creates revisions"| node_intake_service
node_api_routes -.->|"dispatches matching"| node_matching
node_matching -.->|"routes exceptions"| node_exceptions
node_api_routes -->|"dispatches actions"| node_exceptions
node_api_routes -->|"dispatches decisions"| node_approvals
node_api_routes -->|"dispatches requests"| node_payments
node_api_routes -.->|"dispatches metrics"| node_dashboard_service
node_api_routes -.->|"dispatches reads"| node_reference_service
node_api_routes -.->|"dispatches authentication"| node_auth
node_api_routes -->|"authenticates requests"| node_auth_middleware
node_auth_middleware -->|"loads user"| node_domain_models
node_auth -->|"reads and writes users"| node_domain_models
node_auth -->|"issues tokens"| node_auth_middleware
node_domain_models -->|"stores records"| node_mongo
node_generator -->|"uses settings"| node_generator_config
node_dataset_validation -->|"uses settings"| node_generator_config
node_dataset_validation -->|"validates output"| node_generator
node_evaluation -->|"compares predictions"| node_generator
node_generator -.->|"imports synthetic data"| node_domain_models

click node_workspace "https://github.com/prasad066/candidateworkspace/blob/main/frontend/src/App.jsx"
click node_intake_ui "https://github.com/prasad066/candidateworkspace/blob/main/frontend/src/pages/IntakesPage.jsx"
click node_exceptions_ui "https://github.com/prasad066/candidateworkspace/blob/main/frontend/src/pages/ExceptionsPage.jsx"
click node_approvals_ui "https://github.com/prasad066/candidateworkspace/blob/main/frontend/src/pages/ApprovalsPage.jsx"
click node_payments_ui "https://github.com/prasad066/candidateworkspace/blob/main/frontend/src/pages/PaymentsPage.jsx"
click node_dashboard_ui "https://github.com/prasad066/candidateworkspace/blob/main/frontend/src/pages/DashboardPage.jsx"
click node_reference_ui "https://github.com/prasad066/candidateworkspace/blob/main/frontend/src/pages/ReferenceDataPage.jsx"
click node_api_client "https://github.com/prasad066/candidateworkspace/blob/main/frontend/src/services/api.js"
click node_api_routes "https://github.com/prasad066/candidateworkspace/tree/main/backend/routes"
click node_intake_controller "https://github.com/prasad066/candidateworkspace/blob/main/backend/controllers/invoiceIntakeController.js"
click node_extraction "https://github.com/prasad066/candidateworkspace/blob/main/backend/services/extractionAdapter.js"
click node_intake_service "https://github.com/prasad066/candidateworkspace/blob/main/backend/services/invoiceIntakeService.js"
click node_source_storage "https://github.com/prasad066/candidateworkspace/blob/main/backend/services/invoiceSourceStorage.js"
click node_matching "https://github.com/prasad066/candidateworkspace/blob/main/backend/services/matchingEngine.js"
click node_exceptions "https://github.com/prasad066/candidateworkspace/blob/main/backend/services/exceptionService.js"
click node_approvals "https://github.com/prasad066/candidateworkspace/blob/main/backend/services/approvalService.js"
click node_payments "https://github.com/prasad066/candidateworkspace/blob/main/backend/services/paymentService.js"
click node_dashboard_service "https://github.com/prasad066/candidateworkspace/blob/main/backend/services/dashboardService.js"
click node_reference_service "https://github.com/prasad066/candidateworkspace/blob/main/backend/services/referenceDataService.js"
click node_auth "https://github.com/prasad066/candidateworkspace/blob/main/backend/services/authService.js"
click node_auth_middleware "https://github.com/prasad066/candidateworkspace/blob/main/backend/middleware/authentication.js"
click node_domain_models "https://github.com/prasad066/candidateworkspace/tree/main/backend/models"
click node_generator "https://github.com/prasad066/candidateworkspace/blob/main/data-generator/generators/synthetic_data.py"
click node_generator_config "https://github.com/prasad066/candidateworkspace/blob/main/data-generator/config.py"
click node_dataset_validation "https://github.com/prasad066/candidateworkspace/blob/main/data-generator/validators/dataset_validator.py"
click node_evaluation "https://github.com/prasad066/candidateworkspace/blob/main/data-generator/evaluate.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_workspace,node_intake_ui,node_exceptions_ui,node_approvals_ui,node_payments_ui,node_dashboard_ui,node_reference_ui,node_api_client,node_user toneBlue
class node_api_routes,node_intake_controller,node_extraction,node_intake_service,node_source_storage,node_matching,node_exceptions,node_approvals,node_payments,node_dashboard_service,node_reference_service,node_mongo toneAmber
class node_auth,node_auth_middleware,node_domain_models toneMint
class node_generator,node_generator_config,node_dataset_validation,node_evaluation toneRose
```

## Components

### Workflow UI

- [Workspace and routing](https://github.com/prasad066/candidateworkspace/blob/main/frontend/src/App.jsx): `frontend/src/App.jsx`
- [Intake review](https://github.com/prasad066/candidateworkspace/blob/main/frontend/src/pages/IntakesPage.jsx): `frontend/src/pages/IntakesPage.jsx`
- [Exception review](https://github.com/prasad066/candidateworkspace/blob/main/frontend/src/pages/ExceptionsPage.jsx): `frontend/src/pages/ExceptionsPage.jsx`
- [Approval decisions](https://github.com/prasad066/candidateworkspace/blob/main/frontend/src/pages/ApprovalsPage.jsx): `frontend/src/pages/ApprovalsPage.jsx`
- [Payment readiness](https://github.com/prasad066/candidateworkspace/blob/main/frontend/src/pages/PaymentsPage.jsx): `frontend/src/pages/PaymentsPage.jsx`
- [Dashboard](https://github.com/prasad066/candidateworkspace/blob/main/frontend/src/pages/DashboardPage.jsx): `frontend/src/pages/DashboardPage.jsx`
- [Reference views](https://github.com/prasad066/candidateworkspace/blob/main/frontend/src/pages/ReferenceDataPage.jsx): `frontend/src/pages/ReferenceDataPage.jsx`
- [API client](https://github.com/prasad066/candidateworkspace/blob/main/frontend/src/services/api.js): `frontend/src/services/api.js`

### Invoice Operations

- [API routing](https://github.com/prasad066/candidateworkspace/tree/main/backend/routes): `backend/routes`
- [Intake handlers](https://github.com/prasad066/candidateworkspace/blob/main/backend/controllers/invoiceIntakeController.js): `backend/controllers/invoiceIntakeController.js`
- [Structured extraction](https://github.com/prasad066/candidateworkspace/blob/main/backend/services/extractionAdapter.js): `backend/services/extractionAdapter.js`
- [Intake revisions](https://github.com/prasad066/candidateworkspace/blob/main/backend/services/invoiceIntakeService.js): `backend/services/invoiceIntakeService.js`
- [Source file storage](https://github.com/prasad066/candidateworkspace/blob/main/backend/services/invoiceSourceStorage.js): `backend/services/invoiceSourceStorage.js`
- [Three-way matching](https://github.com/prasad066/candidateworkspace/blob/main/backend/services/matchingEngine.js): `backend/services/matchingEngine.js`
- [Exception workflow](https://github.com/prasad066/candidateworkspace/blob/main/backend/services/exceptionService.js): `backend/services/exceptionService.js`
- [Approval workflow](https://github.com/prasad066/candidateworkspace/blob/main/backend/services/approvalService.js): `backend/services/approvalService.js`
- [Payment readiness](https://github.com/prasad066/candidateworkspace/blob/main/backend/services/paymentService.js): `backend/services/paymentService.js`
- [Dashboard metrics](https://github.com/prasad066/candidateworkspace/blob/main/backend/services/dashboardService.js): `backend/services/dashboardService.js`
- [Reference data](https://github.com/prasad066/candidateworkspace/blob/main/backend/services/referenceDataService.js): `backend/services/referenceDataService.js`

### Identity and Data

- [Authentication](https://github.com/prasad066/candidateworkspace/blob/main/backend/services/authService.js): `backend/services/authService.js`
- [Request authentication](https://github.com/prasad066/candidateworkspace/blob/main/backend/middleware/authentication.js): `backend/middleware/authentication.js`
- [Workflow records](https://github.com/prasad066/candidateworkspace/tree/main/backend/models): `backend/models`

### Synthetic Data

- [Synthetic data generation](https://github.com/prasad066/candidateworkspace/blob/main/data-generator/generators/synthetic_data.py): `data-generator/generators/synthetic_data.py`
- [Generator configuration](https://github.com/prasad066/candidateworkspace/blob/main/data-generator/config.py): `data-generator/config.py`
- [Dataset validation](https://github.com/prasad066/candidateworkspace/blob/main/data-generator/validators/dataset_validator.py): `data-generator/validators/dataset_validator.py`
- [Prediction evaluation](https://github.com/prasad066/candidateworkspace/blob/main/data-generator/evaluate.py): `data-generator/evaluate.py`

### Other components

- **Finance user**
- **MongoDB**

## Connections

- Finance user → Workspace and routing: uses (evidence: `README.md`)
- Workspace and routing → Intake review: routes to (evidence: `frontend/src/App.jsx`)
- Workspace and routing → Exception review: routes to (evidence: `frontend/src/App.jsx`)
- Workspace and routing → Approval decisions: routes to (evidence: `frontend/src/App.jsx`)
- Workspace and routing → Payment readiness: routes to (evidence: `frontend/src/App.jsx`)
- Workspace and routing → Dashboard: routes to (evidence: `frontend/src/App.jsx`)
- Workspace and routing → Reference views: routes to (evidence: `frontend/src/App.jsx`)
- Intake review → API client: requests data (evidence: `frontend/src/pages/IntakesPage.jsx`)
- Intake review → API client: submits corrections (evidence: `frontend/src/pages/IntakesPage.jsx`)
- Exception review → API client: requests data (evidence: `frontend/src/App.jsx`)
- Approval decisions → API client: requests data (evidence: `frontend/src/App.jsx`)
- Payment readiness → API client: requests data (evidence: `frontend/src/App.jsx`)
- Dashboard → API client: requests data (evidence: `frontend/src/App.jsx`)
- Reference views → API client: requests data (evidence: `frontend/src/App.jsx`)
- API client → API routing: calls API (evidence: `README.md`)
- API routing → Intake handlers: dispatches intake (evidence: `backend/routes/invoiceIntakeRoutes.js`)
- Intake handlers → Structured extraction: parses files (evidence: `backend/controllers/invoiceIntakeController.js`)
- Intake handlers → Source file storage: persists source (evidence: `backend/controllers/invoiceIntakeController.js`)
- Intake handlers → Intake revisions: creates revisions (evidence: `backend/controllers/invoiceIntakeController.js`)
- API routing → Three-way matching: dispatches matching
- Three-way matching → Exception workflow: routes exceptions
- API routing → Exception workflow: dispatches actions (evidence: `backend/routes/exceptionRoutes.js`)
- API routing → Approval workflow: dispatches decisions (evidence: `backend/routes/approvalRoutes.js`)
- API routing → Payment readiness: dispatches requests (evidence: `backend/routes/paymentRoutes.js`)
- API routing → Dashboard metrics: dispatches metrics
- API routing → Reference data: dispatches reads
- API routing → Authentication: dispatches authentication
- API routing → Request authentication: authenticates requests (evidence: `backend/routes/invoiceIntakeRoutes.js`)
- Request authentication → Workflow records: loads user (evidence: `backend/middleware/authentication.js`)
- Authentication → Workflow records: reads and writes users (evidence: `backend/services/authService.js`)
- Authentication → Request authentication: issues tokens (evidence: `backend/services/authService.js`)
- Workflow records → MongoDB: stores records (evidence: `README.md`)
- Synthetic data generation → Generator configuration: uses settings (evidence: `data-generator/generators/synthetic_data.py`)
- Dataset validation → Generator configuration: uses settings (evidence: `data-generator/validators/dataset_validator.py`)
- Dataset validation → Synthetic data generation: validates output (evidence: `data-generator/validators/dataset_validator.py`)
- Prediction evaluation → Synthetic data generation: compares predictions (evidence: `README.md`)
- Synthetic data generation → Workflow records: imports synthetic data