Implementation of task

fullstack/README.md

@@ -1 +1,46 @@
 ## Fullstack Developer
+
+## Project Overview
+This project was initialized with the necessary tech stack. As part of the task, we implemented a database that worked as a cache for exchange rates from the Czech National Bank API. The data is updated every 5 minutes and displayed to the user through a web interface.
+
+## Features Implemented
+
+### Backend (`packages/server`)
+The architecture of the implementation is that we have a background job that refreshes the rates. In our case, it is an interval, but in a real production app, it would be something like a lambda function that will be triggered every 5 minutes. This is done to avoid making extra calls to the database when fetching the rates and adding unnecessary delay.
+
+We created a GraphQL resolver with two methods:
+- **`getRates`**: Fetches exchange rates from the PostgreSQL database, which works as a cache.
+- **`updateExchangeRates`**: A mutation that fetches the latest exchange rates from the Czech National Bank API and updates the cache.
+
+Additionally, we implemented:
+- **Exchange Rates Model**: A model that represents exchange rates, stored in the PostgreSQL database.
+- **Repository**: A repository to manage CRUD operations for the exchange rate data in the database.
+- **Refresh Rates Job**: This job gets the latest exchange rates from the from the Czech National Bank API and later upserts the data in the cache.
+- **Test for the Job**: In the tests folder there is a test for the refresh-rates job that can be run with ``npx jest`` in the ``fullstack/task`` directory
+
+This setup ensures the cache stays up to date while providing fast and efficient data retrieval for the frontend.
+
+### Frontend (`packages/client`)
+The frontend has three main pages:
+
+- **Dashboard**: The homepage of the application.
+- **Exchange Rates**: Displays exchange rates, which automatically refresh every 5 minutes.
+- **Convert Rates**: Allows users to convert between different currencies based on the latest exchange rates. The history of conversions is saved, allowing users to track their progression over time.
+
+The frontend uses Apollo Client to fetch and display exchange rates.
+
+### Setup Instructions
+Follow these steps to install and run the project:  
+
+1️⃣ **Navigate to the project directory**  
+cd fullstack/task
+2️⃣ **Install all dependencies**  
+yarn install
+3️⃣ **Create and start the database**  
+yarn server db-create
+4️⃣ **Start the backend server**  
+yarn  server start
+5️⃣ **Start the frontend server**  
+yarn  client start
+6️⃣ **Run the tests**  
+yarn server test

fullstack/task/.yarnrc.yml

@@ -1,4 +1,4 @@
-nodeLinker: pnp
+nodeLinker: node-modules
 
 plugins:
   - path: .yarn/plugins/@yarnpkg/plugin-workspace-tools.cjs

fullstack/task/packages/client/codegen.yml

@@ -0,0 +1,23 @@
+overwrite: true
+schema:
+  - http://localhost:4001/graphql:
+      headers:
+        client-version: 1.0.0
+generates:
+  src/gql/types.tsx:
+    plugins:
+      - 'typescript'
+      - 'fragment-matcher'
+    config:
+      apolloClientVersion: 3
+      avoidOptionals: true
+      namingConvention:
+        enumValues: keep
+  src/gql/generated/possible-types.ts:
+    plugins:
+      - fragment-matcher
+  src/gql/graphql.schema.json:
+    plugins:
+      - 'introspection'
+    config:
+      apolloClientVersion: 3