# vict0r-starlit-reader/library-management-system architecture

> Architecture diagram of the GitHub repository vict0r-starlit-reader/library-management-system, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-11-10). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/vict0r-starlit-reader/library-management-system
- Repository: https://github.com/vict0r-starlit-reader/library-management-system

## Overview

This repository is a NestJS library backend with a PostgreSQL database managed by Prisma. Its sampled runtime workflow starts the Nest application, serves a root HTTP endpoint through the controller and service, and initializes a Prisma connection. The README describes a broader data model—patron/librarian roles and a normalized book/genre catalog—plus migrations and seed data. The sampled controller only returns “Hello World”; no catalog-management API was shown, so those capabilities are represented as schema and data setup rather than runtime routes.

Main entry points: [`library-api/src/app.module.ts`](https://github.com/vict0r-starlit-reader/library-management-system/blob/main/library-api/src/app.module.ts) (App module), [`library-api/src/main.ts`](https://github.com/vict0r-starlit-reader/library-management-system/blob/main/library-api/src/main.ts) (Nest bootstrap), [`library-api/src/app.controller.ts`](https://github.com/vict0r-starlit-reader/library-management-system/blob/main/library-api/src/app.controller.ts) (Root controller), [`library-api/src/prisma/prisma.service.ts`](https://github.com/vict0r-starlit-reader/library-management-system/blob/main/library-api/src/prisma/prisma.service.ts) (Prisma service)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_runtime["API runtime"]
  node_bootstrap["Nest bootstrap<br/>[main.ts]"]
  node_module["App module<br/>[app.module.ts]"]
  node_controller["Root controller<br/>[app.controller.ts]"]
  node_service["App service<br/>[app.service.ts]"]
  node_prisma_service["Prisma service<br/>[prisma.service.ts]"]
end

subgraph group_data["Catalog data"]
  node_schema["Roles and catalog schema<br/>[schema.prisma]"]
  node_postgres[("PostgreSQL")]
end

subgraph group_setup["Database setup"]
  node_migrations["Schema migrations"]
  node_seed["Catalog seeding<br/>[seed.ts]"]
end

node_client(("HTTP client"))

node_client -->|"sends HTTP"| node_bootstrap
node_bootstrap -->|"starts"| node_module
node_module -->|"registers"| node_controller
node_module -->|"provides"| node_service
node_module -->|"provides"| node_prisma_service
node_controller -->|"calls"| node_service
node_prisma_service -->|"connects to"| node_postgres
node_seed -->|"upserts catalog"| node_postgres
node_schema -.->|"defines data model"| node_postgres
node_migrations -.->|"applies schema"| node_postgres

click node_bootstrap "https://github.com/vict0r-starlit-reader/library-management-system/blob/main/library-api/src/main.ts"
click node_module "https://github.com/vict0r-starlit-reader/library-management-system/blob/main/library-api/src/app.module.ts"
click node_controller "https://github.com/vict0r-starlit-reader/library-management-system/blob/main/library-api/src/app.controller.ts"
click node_service "https://github.com/vict0r-starlit-reader/library-management-system/blob/main/library-api/src/app.service.ts"
click node_prisma_service "https://github.com/vict0r-starlit-reader/library-management-system/blob/main/library-api/src/prisma/prisma.service.ts"
click node_schema "https://github.com/vict0r-starlit-reader/library-management-system/blob/main/library-api/prisma/schema.prisma"
click node_migrations "https://github.com/vict0r-starlit-reader/library-management-system/tree/main/library-api/prisma/migrations"
click node_seed "https://github.com/vict0r-starlit-reader/library-management-system/blob/main/library-api/prisma/seed.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_bootstrap,node_module,node_controller,node_service,node_prisma_service,node_client toneBlue
class node_schema,node_postgres toneAmber
class node_migrations,node_seed toneMint
```

## Components

### API runtime

- [Nest bootstrap](https://github.com/vict0r-starlit-reader/library-management-system/blob/main/library-api/src/main.ts): `library-api/src/main.ts`
- [App module](https://github.com/vict0r-starlit-reader/library-management-system/blob/main/library-api/src/app.module.ts): `library-api/src/app.module.ts`
- [Root controller](https://github.com/vict0r-starlit-reader/library-management-system/blob/main/library-api/src/app.controller.ts): `library-api/src/app.controller.ts`
- [App service](https://github.com/vict0r-starlit-reader/library-management-system/blob/main/library-api/src/app.service.ts): `library-api/src/app.service.ts`
- [Prisma service](https://github.com/vict0r-starlit-reader/library-management-system/blob/main/library-api/src/prisma/prisma.service.ts): `library-api/src/prisma/prisma.service.ts`

### Catalog data

- [Roles and catalog schema](https://github.com/vict0r-starlit-reader/library-management-system/blob/main/library-api/prisma/schema.prisma): `library-api/prisma/schema.prisma`
- **PostgreSQL**

### Database setup

- [Schema migrations](https://github.com/vict0r-starlit-reader/library-management-system/tree/main/library-api/prisma/migrations): `library-api/prisma/migrations`
- [Catalog seeding](https://github.com/vict0r-starlit-reader/library-management-system/blob/main/library-api/prisma/seed.ts): `library-api/prisma/seed.ts`

### Other components

- **HTTP client**

## Connections

- HTTP client → Nest bootstrap: sends HTTP (evidence: `library-api/src/main.ts`)
- Nest bootstrap → App module: starts (evidence: `library-api/src/main.ts`)
- App module → Root controller: registers (evidence: `library-api/src/app.module.ts`)
- App module → App service: provides (evidence: `library-api/src/app.module.ts`)
- App module → Prisma service: provides (evidence: `library-api/src/app.module.ts`)
- Root controller → App service: calls (evidence: `library-api/src/app.controller.ts`)
- Prisma service → PostgreSQL: connects to (evidence: `library-api/src/prisma/prisma.service.ts`)
- Catalog seeding → PostgreSQL: upserts catalog (evidence: `library-api/prisma/seed.ts`)
- Roles and catalog schema → PostgreSQL: defines data model
- Schema migrations → PostgreSQL: applies schema