Development Overview

Welcome to the Solverhood development guide. This section covers everything you need to know about developing applications with our platform, from basic concepts to advanced techniques.

Development Philosophy

At Solverhood, we believe in:

• Simplicity: Easy-to-use APIs and clear documentation
• Performance: Fast, scalable, and efficient solutions
• Security: Built-in security best practices
• Developer Experience: Excellent tooling and debugging capabilities
• Community: Open source contributions and collaboration

Technology Stack

Core Technologies

• Backend: Node.js with Express.js
• Database: PostgreSQL with Redis for caching
• Frontend: React with TypeScript
• API: RESTful APIs with GraphQL support
• Authentication: JWT with OAuth 2.0
• Deployment: Docker with Kubernetes support

Development Tools

• Package Manager: pnpm (recommended) or npm
• Code Quality: ESLint, Prettier, TypeScript
• Testing: Jest, React Testing Library
• Version Control: Git with GitHub
• CI/CD: GitHub Actions

Getting Started

Prerequisites

Before you begin development, ensure you have:

1. Development Environment: Setup Guide
2. API Access: Get your API keys from the dashboard
3. Basic Knowledge: JavaScript/TypeScript, REST APIs, Git

Quick Start

# Clone the starter template
git clone https://github.com/solverhood/starter-template.git
cd starter-template

# Install dependencies
pnpm install

# Set up environment
cp .env.example .env
# Edit .env with your API keys

# Start development server
pnpm dev

Development Workflow

1. Project Structure

my-solverhood-app/
├── src/
│   ├── components/     # React components
│   ├── services/       # API services
│   ├── utils/          # Utility functions
│   ├── types/          # TypeScript types
│   └── pages/          # Page components
├── public/             # Static assets
├── tests/              # Test files
├── docs/               # Documentation
└── package.json

2. Development Process

1. Plan: Define requirements and architecture
2. Setup: Initialize project and dependencies
3. Develop: Write code with tests
4. Test: Run unit and integration tests
5. Review: Code review and quality checks
6. Deploy: Deploy to staging/production

3. Code Quality

We maintain high code quality through:

• Linting: ESLint for code style and potential errors
• Formatting: Prettier for consistent code formatting
• Type Checking: TypeScript for type safety
• Testing: Comprehensive test coverage
• Documentation: Clear and up-to-date docs

API Development

REST API Design

Our APIs follow RESTful principles:

// Example API endpoint
app.get('/api/v1/projects', async (req, res) => {
  try {
    const projects = await ProjectService.list(req.query);
    res.json({
      success: true,
      data: projects,
      meta: {
        total: projects.length,
        page: req.query.page || 1,
      },
    });
  } catch (error) {
    res.status(500).json({
      success: false,
      error: error.message,
    });
  }
});

Authentication

Secure your APIs with JWT authentication:

const authenticateToken = (req, res, next) => {
  const authHeader = req.headers['authorization'];
  const token = authHeader && authHeader.split(' ')[1];

  if (!token) {
    return res.status(401).json({ error: 'Access token required' });
  }

  jwt.verify(token, process.env.JWT_SECRET, (err, user) => {
    if (err) {
      return res.status(403).json({ error: 'Invalid token' });
    }
    req.user = user;
    next();
  });
};

Frontend Development

React Components

Build reusable components:

interface ProjectCardProps {
  project: Project;
  onEdit: (id: string) => void;
  onDelete: (id: string) => void;
}

const ProjectCard: React.FC<ProjectCardProps> = ({ project, onEdit, onDelete }) => {
  return (
    <div className='project-card'>
      <h3>{project.name}</h3>
      <p>{project.description}</p>
      <div className='actions'>
        <button onClick={() => onEdit(project.id)}>Edit</button>
        <button onClick={() => onDelete(project.id)}>Delete</button>
      </div>
    </div>
  );
};

State Management

Use React hooks for state management:

const useProjects = () => {
  const [projects, setProjects] = useState<Project[]>([]);
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);

  const fetchProjects = async () => {
    setLoading(true);
    try {
      const response = await api.get('/projects');
      setProjects(response.data);
    } catch (err) {
      setError(err.message);
    } finally {
      setLoading(false);
    }
  };

  return { projects, loading, error, fetchProjects };
};

Database Development

Schema Design

Design efficient database schemas:

-- Example project table
CREATE TABLE projects (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  name VARCHAR(255) NOT NULL,
  description TEXT,
  user_id UUID REFERENCES users(id),
  status VARCHAR(50) DEFAULT 'active',
  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- Indexes for performance
CREATE INDEX idx_projects_user_id ON projects(user_id);
CREATE INDEX idx_projects_status ON projects(status);

Query Optimization

Write efficient database queries:

// Use connection pooling
const pool = new Pool({
  connectionString: process.env.DATABASE_URL,
  max: 20,
  idleTimeoutMillis: 30000,
  connectionTimeoutMillis: 2000,
});

// Optimize queries with proper indexing
const getProjectsByUser = async (userId) => {
  const query = `
    SELECT p.*, u.name as user_name
    FROM projects p
    JOIN users u ON p.user_id = u.id
    WHERE p.user_id = $1
    ORDER BY p.created_at DESC
  `;
  return pool.query(query, [userId]);
};

Testing

Unit Testing

Write comprehensive unit tests:

// Example test for ProjectService
describe('ProjectService', () => {
  let projectService;

  beforeEach(() => {
    projectService = new ProjectService();
  });

  test('should create a new project', async () => {
    const projectData = {
      name: 'Test Project',
      description: 'A test project',
    };

    const project = await projectService.create(projectData);

    expect(project).toHaveProperty('id');
    expect(project.name).toBe(projectData.name);
    expect(project.description).toBe(projectData.description);
  });

  test('should throw error for invalid project data', async () => {
    const invalidData = { name: '' };

    await expect(projectService.create(invalidData)).rejects.toThrow('Project name is required');
  });
});

Integration Testing

Test API endpoints:

describe('Projects API', () => {
  test('GET /api/projects should return projects', async () => {
    const response = await request(app).get('/api/projects').set('Authorization', `Bearer ${validToken}`);

    expect(response.status).toBe(200);
    expect(response.body).toHaveProperty('data');
    expect(Array.isArray(response.body.data)).toBe(true);
  });
});

Performance Optimization

Caching Strategies

Implement effective caching:

// Redis caching example
const cacheProject = async (projectId, projectData) => {
  await redis.setex(`project:${projectId}`, 3600, JSON.stringify(projectData));
};

const getCachedProject = async (projectId) => {
  const cached = await redis.get(`project:${projectId}`);
  return cached ? JSON.parse(cached) : null;
};

Database Optimization

• Use appropriate indexes
• Implement query pagination
• Optimize N+1 queries
• Use database connection pooling

Security Best Practices

Input Validation

Validate all user inputs:

const { body, validationResult } = require('express-validator');

const validateProject = [
  body('name').trim().isLength({ min: 1, max: 255 }),
  body('description').optional().isLength({ max: 1000 }),
  (req, res, next) => {
    const errors = validationResult(req);
    if (!errors.isEmpty()) {
      return res.status(400).json({ errors: errors.array() });
    }
    next();
  },
];

Security Headers

Implement security headers:

const helmet = require('helmet');

app.use(
  helmet({
    contentSecurityPolicy: {
      directives: {
        defaultSrc: ["'self'"],
        styleSrc: ["'self'", "'unsafe-inline'"],
        scriptSrc: ["'self'"],
      },
    },
  })
);

Deployment

Environment Configuration

Manage different environments:

// config/database.js
const config = {
  development: {
    url: process.env.DATABASE_URL,
    dialect: 'postgres',
    logging: console.log,
  },
  production: {
    url: process.env.DATABASE_URL,
    dialect: 'postgres',
    logging: false,
    pool: {
      max: 20,
      min: 5,
    },
  },
};

module.exports = config[process.env.NODE_ENV || 'development'];

Docker Configuration

FROM node:18-alpine

WORKDIR /app

COPY package*.json ./
RUN npm ci --only=production

COPY . .
RUN npm run build

EXPOSE 3000

CMD ["npm", "start"]

Next Steps

• API Reference
• Frontend Guide
• Backend Guide
• Testing Guide - Coming soon
• Deployment Guide

Resources

• GitHub Repository
• Community Forum
• API Documentation
• Support