Web Interface and Views

class RosettaBaseMixin:
    """
    Base mixin providing authentication and po_filter property.
    
    Requires user to pass can_translate() check and provides never_cache decorator.
    """
    
    @property
    def po_filter(self) -> dict:
        """Filter parameters for .po file selection."""

class RosettaFileLevelMixin(RosettaBaseMixin):
    """
    Mixin for operations on single .po files.
    
    Extends RosettaBaseMixin with file-specific functionality.
    """

class TranslationFileListView(RosettaBaseMixin, TemplateView):
    """
    Lists available translation files for editing.
    
    Displays .po files grouped by language and application, with counts
    of translated, untranslated, and fuzzy entries. Provides navigation
    to translation editing interface.
    """
    
    template_name: str = "rosetta/languages.html"

class TranslationFormView(RosettaFileLevelMixin, TemplateView):
    """
    Main translation editing interface.
    
    Provides paginated view of translation entries with:
    - Inline editing of msgstr values
    - Fuzzy flag management  
    - Search and filtering
    - Progress tracking
    - Batch operations
    """
    
    template_name: str = "rosetta/pofile.html"

class TranslationFileDownload(RosettaFileLevelMixin, View):
    """
    Handles .po/.mo file downloads.
    
    Supports downloading:
    - Original .po files
    - Compiled .mo files  
    - Modified .po files with current translations
    """
    
    def get(self, request, *args, **kwargs) -> HttpResponse:
        """
        Download translation file.
        
        Parameters:
        - file_format: 'po' or 'mo'
        
        Returns:
        HttpResponse with file attachment
        """

def translate_text(request) -> JsonResponse:
    """
    AJAX endpoint for translation suggestions.
    
    Accepts POST request with:
    - text: Text to translate
    - from_language: Source language code
    - to_language: Target language code
    
    Returns:
    JsonResponse with translated text or error message
    
    Requires:
    - User authentication via can_translate()
    - ROSETTA_ENABLE_TRANSLATION_SUGGESTIONS = True
    - Configured translation service API keys
    """

urlpatterns: list = [
    # Main interfaces
    path('', TranslationFileListView.as_view(), name='rosetta-file-list'),
    path('files/<path:po_filter>/', TranslationFormView.as_view(), name='rosetta-form'),
    
    # File operations
    path('download/<path:po_filter>/', TranslationFileDownload.as_view(), name='rosetta-download-file'),
    
    # API endpoints
    path('translate/', translate_text, name='rosetta.translate_text'),
    
    # Legacy redirects
    path('select/', RedirectView.as_view(), name='rosetta-old-home-redirect'),
    path('files/', RedirectView.as_view(), name='rosetta-file-list-redirect'),
]

def get_app_name(path: str) -> str:
    """
    Extract Django application name from .po file path.
    
    Parameters:
    - path: File system path to .po file
    
    Returns:
    Application name string
    """

def urlencode_safe(query: dict) -> str:
    """
    URL-encode query parameters safely for template use.
    
    Parameters:
    - query: Dictionary of query parameters
    
    Returns:
    URL-encoded query string
    """

class LoginURL(Promise):
    """
    Tests-friendly login URL that resolves at runtime.
    
    Used by user_passes_test decorator to provide dynamic
    login URL based on ROSETTA_LOGIN_URL setting.
    """
    
    def __str__(self) -> str:
        """Returns configured login URL."""

# In your Django URLs configuration
from django.urls import path, include

urlpatterns = [
    path('rosetta/', include('rosetta.urls')),
]

# Access the interface at /rosetta/ in your browser
# - Lists all available translation files
# - Click on a file to start editing translations
# - Use pagination to navigate through entries
# - Download .po/.mo files as needed

from rosetta.views import RosettaBaseMixin, TranslationFormView

class CustomTranslationView(RosettaBaseMixin, TemplateView):
    """Custom view extending Rosetta functionality."""
    
    template_name = 'my_app/custom_translations.html'
    
    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        # Add custom context
        context['custom_data'] = self.get_custom_data()
        return context
        
    def get_custom_data(self):
        """Add your custom logic here."""
        return {}

// Frontend JavaScript for translation suggestions
function getTranslationSuggestion(text, fromLang, toLang) {
    fetch('/rosetta/translate/', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/x-www-form-urlencoded',
            'X-CSRFToken': getCookie('csrftoken')
        },
        body: new URLSearchParams({
            'text': text,
            'from_language': fromLang,
            'to_language': toLang
        })
    })
    .then(response => response.json())
    .then(data => {
        if (data.translation) {
            // Use the translation suggestion
            document.getElementById('msgstr-field').value = data.translation;
        }
    });
}