50 implement resolvers and connect graphql to mysql

.gitignore

@@ -0,0 +1,16 @@
+# Dependencies
+node_modules/
+
+# Build output
+dist/
+
+# Environment variables and secrets
+.env
+.env.*
+!.env.example
+
+# Logs
+*.log
+
+# macOS
+.DS_Store

README.md

@@ -18,7 +18,7 @@ Before a pull request can be merged:
    request, and approvals from staff do not count — you review each other's
    code.
 2. **Every review comment must be marked resolved.** Reply to each one, fix it
-   or explain why not, then click *Resolve conversation*.
+   or explain why not, then click _Resolve conversation_.
 3. **Pushing new commits dismisses the approval**, so if you change something
    after being approved, ask for another review. This is deliberate: what was
    approved is what gets merged.
@@ -29,8 +29,7 @@ Before a pull request can be merged:
 
 The project plan is to build an application that displays information about a Pokèmon draft. This will involve being able to search through Pokèmon to set up teams, save than, and display information on them. This information will include move access, common vulnerabilities and stats. Adding to this, one should be able to select format, meaning that if you select RBY (Generation 1), only Pokèmon from gen 1 with the moves and stats they had back then should apper. While one would think just 1000+ Pokèmon is not a particularly large dataset, with the relations between moves, formats and Pokèmon, needing to relate them in an orderly manner, and having to conjoin data for the Natdex-formats who keeps cut content, the need for scalable solution are certainly present.
 
-![Example from prep spreadsheet]()
----
+## ![Example from prep spreadsheet]()
 
 # Dataset
 
@@ -65,3 +64,125 @@ The overall system architecture is shown below.
 
 For a more detailed explanation of the architecture, see
 [Architecture documentation](docs/architecture.md).
+
+# Backend Setup
+
+The backend uses Node.js, TypeScript, Apollo Server, GraphQL, and MariaDB. It exposes a GraphQL API that the React frontend uses to retrieve Pokémon data.
+
+## Requirements
+
+- Node.js and npm (Node.js 24 or newer)
+- Access to the environment where the backend and database will run
+- MariaDB with the Pokémon dataset imported
+
+## Installation
+
+From the repository root, run:
+
+```bash
+cd backend
+npm install
+```
+
+## Database Configuration
+
+Create a `.env` file in the `backend` directory with the following variables:
+
+```dotenv
+DB_HOST=127.0.0.1
+DB_PORT=3306
+DB_USER=your_database_username
+DB_PASSWORD=your_database_password
+DB_NAME=pokemon
+```
+
+Replace the username and password placeholders with valid database credentials. Set the host and port to match your database configuration.
+
+When running the backend locally on your Mac and connecting to MariaDB on the NTNU VM through an SSH tunnel, use the local tunnel endpoint instead:
+
+```dotenv
+DB_HOST=127.0.0.1
+DB_PORT=3307
+```
+
+Keep your actual database credentials in `.env`. Do not commit `.env` files or database credentials to the repository.
+
+## Build and Start the Backend
+
+From the `backend` directory, compile the TypeScript code:
+
+```bash
+npm run build
+```
+
+Start the compiled server:
+
+```bash
+npm start
+```
+
+For development with automatic restarts, use:
+
+```bash
+npm run dev
+```
+
+The GraphQL API listens on port `3001` and is available at [http://localhost:3001/](http://localhost:3001/) from the machine running the backend.
+
+## Example GraphQL Queries
+
+Retrieve Pokémon:
+
+```graphql
+query {
+  pokemons {
+    id
+    name
+    type
+  }
+}
+```
+
+Retrieve one Pokémon by ID:
+
+```graphql
+query {
+  pokemon(id: "pikachu") {
+    id
+    name
+    type
+  }
+}
+```
+
+The `type` field contains the Pokémon's type or types as a string. The `pokemon` query returns `null` when no Pokémon matches the supplied ID.
+
+## Frontend Integration
+
+The React frontend uses Apollo Client to communicate with the GraphQL API. Configure the frontend's GraphQL endpoint to match the backend's accessible URL.
+
+When the backend runs locally on your Mac and the database is on the NTNU VM, keep the database SSH tunnel open while using the application:
+
+```bash
+ssh -N -L 3307:127.0.0.1:3306 <username>@it2810-24.idi.ntnu.no
+```
+
+Replace `<username>` with your VM username. This tunnel forwards local port `3307` to MariaDB on the VM's port `3306`.
+
+If the backend itself runs on the VM and you want to access the GraphQL API locally, use a separate tunnel:
+
+```bash
+ssh -N -L 3001:127.0.0.1:3001 <username>@it2810-24.idi.ntnu.no
+```
+
+Keep the relevant SSH session open while using the tunnel.
+
+## Importing the Dataset
+
+The backend includes an import script for importing the Pokémon Showdown dataset. To run it, configure the database connection in `.env`, then execute:
+
+```bash
+npm run import
+```
+
+Run the import when needed; it may modify the database contents.