handlers.go

package handlers

import (
    // ... other imports
    "assignment1/models"
    "assignment1/services"
)

func BookCountHandler(w http.ResponseWriter, r *http.Request) {
    // Parse query parameters for language
    query := r.URL.Query()
    language := query.Get("language")

    // Fetch book data from the Gutendex API
    books, err := services.FetchBooksByLanguage(language)
    if err != nil {
        // Handle error
        http.Error(w, err.Error(), http.StatusInternalServerError)
        return
    }

    // Process the books to calculate the book count and author count
    // ... (Implementation required)

    // Create a response object
    response := models.GutenbergBookCount{
        Language: language,
        // Books: Number of books (to be calculated),
        // Authors: Number of unique authors (to be calculated),
        // Fraction: Fraction of books in the language (to be calculated),
    }

    // Write the response back as JSON
    w.Header().Set("Content-Type", "application/json")
    if err := json.NewEncoder(w).Encode(response); err != nil {
        http.Error(w, err.Error(), http.StatusInternalServerError)
    }
}

// ... Other handlers