curl -X GET "https://api.tktchurch.com/v1/newsletters/123e4567-e89b-12d3-a456-426614174000" \
  -H "Authorization: Bearer eyJhbGciOiJIUzI1NiIs..."

const getNewsletter = async (accessToken, newsletterId) => {
  const response = await fetch(
    `https://api.tktchurch.com/v1/newsletters/${newsletterId}`,
    {
      headers: {
        'Authorization': `Bearer ${accessToken}`
      }
    }
  );

  if (!response.ok) {
    const error = await response.json();
    throw new Error(error.error.reason);
  }

  return response.json();
};

// Usage
try {
  const newsletter = await getNewsletter(
    'eyJhbGciOiJIUzI1NiIs...',
    '123e4567-e89b-12d3-a456-426614174000'
  );
  console.log('Newsletter:', newsletter);
} catch (error) {
  console.error('Failed to get newsletter:', error.message);
}

func getNewsletter(accessToken: String, newsletterId: UUID) async throws -> Newsletter {
    var urlRequest = URLRequest(url: URL(string: "https://api.tktchurch.com/v1/newsletters/\(newsletterId)")!)
    urlRequest.setValue("Bearer \(accessToken)", forHTTPHeaderField: "Authorization")
    
    let (data, response) = try await URLSession.shared.data(for: urlRequest)
    guard let httpResponse = response as? HTTPURLResponse else {
        throw URLError(.badServerResponse)
    }
    
    if httpResponse.statusCode != 200 {
        let error = try JSONDecoder().decode(ErrorResponse.self, from: data)
        throw error
    }
    
    return try JSONDecoder().decode(Newsletter.self, from: data)
}

// Usage
do {
    let newsletter = try await getNewsletter(
        accessToken: "eyJhbGciOiJIUzI1NiIs...",
        newsletterId: UUID(uuidString: "123e4567-e89b-12d3-a456-426614174000")!
    )
    print("Newsletter:", newsletter)
} catch {
    print("Failed to get newsletter:", error.localizedDescription)
}

class NewsletterService(private val client: OkHttpClient) {
    suspend fun getNewsletter(accessToken: String, newsletterId: String): Newsletter {
        val request = Request.Builder()
            .url("https://api.tktchurch.com/v1/newsletters/$newsletterId")
            .header("Authorization", "Bearer $accessToken")
            .build()

        client.newCall(request).execute().use { response ->
            if (!response.isSuccessful) {
                val error = response.body?.string()?.fromJson<ErrorResponse>()
                throw Exception(error?.reason ?: "Failed to get newsletter")
            }
            
            return response.body?.string()?.fromJson<Newsletter>()
                ?: throw Exception("Empty response")
        }
    }
}

// Usage
try {
    val newsletter = newsletterService.getNewsletter(
        "eyJhbGciOiJIUzI1NiIs...",
        "123e4567-e89b-12d3-a456-426614174000"
    )
    println("Newsletter: $newsletter")
} catch (e: Exception) {
    println("Failed to get newsletter: ${e.message}")
}

import axios from 'axios';

interface Newsletter {
  id: string;
  title: string;
  content: string;
  image?: {
    id: string;
    url: string;
  };
  imageUrl?: string;
  pdf?: {
    id: string;
    url: string;
  };
  pdfUrl?: string;
  hasPdf: boolean;
  status: 'draft' | 'scheduled' | 'published' | 'archived';
  publishDate?: string;
  recipientCount: number;
  createdAt: string;
  updatedAt: string;
  createdBy: string;
}

const getNewsletter = async (
  accessToken: string,
  newsletterId: string
): Promise<Newsletter> => {
  try {
    const response = await axios.get(
      `https://api.tktchurch.com/v1/newsletters/${newsletterId}`,
      {
        headers: {
          'Authorization': `Bearer ${accessToken}`
        },
      }
    );
    
    return response.data;
  } catch (error) {
    if (axios.isAxiosError(error)) {
      throw new Error(error.response?.data?.error?.reason || 'Failed to get newsletter');
    }
    throw error;
  }
};

// Usage
try {
  const newsletter = await getNewsletter(
    'eyJhbGciOiJIUzI1NiIs...',
    '123e4567-e89b-12d3-a456-426614174000'
  );
  console.log('Newsletter:', newsletter);
} catch (error) {
  console.error('Failed to get newsletter:', error.message);
}

{
  "id": "123e4567-e89b-12d3-a456-426614174000",
  "title": "January Church Updates",
  "content": "Welcome to our first newsletter of 2024...",
  "image": {
    "id": "file-123",
    "url": "https://cdn.tktchurch.com/files/newsletter-image.jpg"
  },
  "imageUrl": null,
  "pdf": {
    "id": "file-456",
    "url": "https://cdn.tktchurch.com/files/newsletter.pdf"
  },
  "pdfUrl": null,
  "hasPdf": true,
  "status": "published",
  "publishDate": "2024-01-01T12:00:00Z",
  "recipientCount": 150,
  "createdAt": "2023-12-30T15:00:00Z",
  "updatedAt": "2024-01-01T12:00:00Z",
  "createdBy": "user-123e4567-e89b-12d3-a456-426614174000"
}

{
  "error": {
    "status": 400,
    "reason": "Invalid newsletter ID format"
  }
}

{
  "error": {
    "status": 401,
    "reason": "Invalid or expired access token"
  }
}

{
  "error": {
    "status": 403,
    "reason": "Missing required permission: readNewsletter"
  }
}

{
  "error": {
    "status": 404,
    "reason": "Newsletter not found"
  }
}