Page Integration

class MenuPageMixin:
    """
    Mixin for pages with menu functionality.
    
    Adds menu-related fields and methods to control how pages
    participate in menu structures and navigation.
    """
    
    # Menu behavior fields
    repeat_in_subnav: models.BooleanField  # Whether to repeat in sub-navigation
    repeated_item_text: models.CharField   # Custom text for repeated items
    
    # Menu settings panels for admin
    menu_settings_panels: list
    
    def modify_submenu_items(
        self, menu_items, current_page, current_ancestor_ids, current_site,
        allow_repeating_parents, apply_active_classes, original_menu_tag,
        menu_instance=None, request=None, use_absolute_page_urls=False
    ):
        """
        Modify menu items for sub-menu display.
        
        Args:
            menu_items: List of menu items to modify
            current_page: The current page being viewed
            current_ancestor_ids: IDs of current page ancestors
            current_site: Current site object
            allow_repeating_parents (bool): Whether to show repeating parent items
            apply_active_classes (bool): Whether to apply active CSS classes
            original_menu_tag (str): Name of original menu tag ('main_menu', etc.)
            menu_instance: Menu instance calling this method
            request: HTTP request object
            use_absolute_page_urls (bool): Whether to use absolute URLs
            
        Returns:
            Modified menu items list
        """
        
    def has_submenu_items(self, current_page, allow_repeating_parents,
                         original_menu_tag, menu_instance=None, request=None):
        """
        Check if this page has items for sub-menu display.
        
        Args:
            current_page: The current page being viewed
            allow_repeating_parents (bool): Allow parent items in sub-menus
            current_site: Current site object
            check_for_children (bool): Whether to check for child pages
            
        Returns:
            bool: True if page has sub-menu items
        """

class MenuPage(MenuPageMixin, Page):
    """
    Abstract page with menu functionality.
    
    Extends Wagtail's Page model with menu-related fields and methods.
    Use as a base class for pages that need menu integration.
    """
    
    class Meta:
        abstract = True

class AbstractLinkPage:
    """
    Base class for link pages that redirect to external URLs.
    
    Provides functionality for pages that exist primarily to
    link to external resources or redirect to other locations.
    """
    
    link_url: str  # External URL to redirect to
    link_text: str  # Display text for the link
    
    def get_sitemap_urls(self, request=None):
        """
        Return empty list as link pages shouldn't appear in sitemaps.
        
        Args:
            request: HTTP request object
            
        Returns:
            list: Empty list (link pages not included in sitemaps)
        """
        
    def serve(self, request):
        """
        Serve a redirect to the external URL.
        
        Args:
            request: HTTP request object
            
        Returns:
            HttpResponseRedirect: Redirect to link_url
        """

class DefinesSubMenuTemplatesMixin:
    """
    Mixin for sub-menu template handling.
    
    Allows pages to specify custom templates for rendering
    their sub-menus at different levels.
    """
    
    def get_sub_menu_template_names(self, current_level=1):
        """
        Get template names for sub-menu rendering at specific levels.
        
        Args:
            current_level (int): Current menu depth level
            
        Returns:
            list: Template names for sub-menu rendering
        """

from wagtailmenus.models import MenuPageMixin
from wagtail.models import Page
from wagtail.fields import RichTextField
from wagtail.admin.panels import FieldPanel

class CustomPage(MenuPageMixin, Page):
    """Custom page with menu functionality."""
    
    body = RichTextField()
    
    content_panels = Page.content_panels + [
        FieldPanel('body'),
    ]
    
    # Add menu settings to the settings tab
    settings_panels = Page.settings_panels + MenuPageMixin.menu_settings_panels

from wagtailmenus.models import MenuPage
from wagtail.fields import RichTextField
from wagtail.admin.panels import FieldPanel

class ArticlePage(MenuPage):
    """Article page with built-in menu functionality."""
    
    body = RichTextField()
    author = models.CharField(max_length=100)
    
    content_panels = Page.content_panels + [
        FieldPanel('body'),
        FieldPanel('author'),
    ]
    
    # menu_settings_panels are automatically included

from wagtailmenus.models import AbstractLinkPage
from wagtail.models import Page
from wagtail.admin.panels import FieldPanel
from django.db import models

class ExternalLinkPage(AbstractLinkPage, Page):
    """Page that redirects to external URLs."""
    
    # Additional fields beyond AbstractLinkPage
    description = models.TextField(blank=True)
    
    content_panels = Page.content_panels + [
        FieldPanel('link_url'),
        FieldPanel('link_text'),
        FieldPanel('description'),
    ]
    
    def get_link_text(self):
        """Get display text for menu items."""
        return self.link_text or self.title

class SpecialPage(MenuPageMixin, Page):
    """Page with custom menu behavior."""
    
    def modify_submenu_behaviour(self, menu_items, current_page,
                               current_ancestor_ids, current_site,
                               check_for_children=True):
        """Custom sub-menu behavior."""
        
        # Add custom menu items
        custom_items = self.get_custom_menu_items()
        menu_items.extend(custom_items)
        
        # Filter items based on user permissions
        if hasattr(current_page, 'request'):
            user = getattr(current_page.request, 'user', None)
            if user and not user.is_staff:
                menu_items = [item for item in menu_items 
                            if not getattr(item, 'staff_only', False)]
        
        return menu_items
    
    def has_submenu_items(self, current_page, allow_repeating_parents=True,
                         current_site=None, check_for_children=True):
        """Check for custom sub-menu items."""
        
        # Always return True if we have custom items
        if self.get_custom_menu_items():
            return True
            
        # Otherwise use default behavior
        return super().has_submenu_items(
            current_page, allow_repeating_parents,
            current_site, check_for_children
        )

from wagtailmenus.models import DefinesSubMenuTemplatesMixin

class CategoryPage(DefinesSubMenuTemplatesMixin, MenuPageMixin, Page):
    """Page with custom sub-menu templates."""
    
    category_type = models.CharField(max_length=50, choices=[
        ('products', 'Products'),
        ('services', 'Services'),
        ('resources', 'Resources'),
    ])
    
    def get_sub_menu_template_names(self, current_level=1):
        """Return category-specific sub-menu templates."""
        
        templates = []
        
        if self.category_type == 'products':
            templates.append('menus/product_submenu.html')
        elif self.category_type == 'services':
            templates.append('menus/service_submenu.html')
            
        # Add level-specific templates
        templates.append(f'menus/submenu_level_{current_level}.html')
        templates.append('menus/submenu.html')  # Fallback
        
        return templates

<!-- Check if current page supports menu functionality -->
{% if page.show_in_menus %}
    <nav class="page-navigation">
        {% children_menu parent_page=page max_levels=1 %}
    </nav>
{% endif %}

<!-- Show sub-navigation if page has menu items -->
{% if page.has_submenu_items %}
    <aside class="subnav">
        {% section_menu show_section_root=False %}
    </aside>
{% endif %}

# In your page models, configure menu settings
class MyPage(MenuPageMixin, Page):
    # ... other fields
    
    settings_panels = Page.settings_panels + [
        # Menu settings are added via MenuPageMixin.menu_settings_panels
        FieldPanel('show_in_menus'),
        FieldPanel('repeat_in_subnav'),
    ] + MenuPageMixin.menu_settings_panels

# Page integration field types
class PageIntegrationTypes:
    show_in_menus: bool
    repeat_in_subnav: bool
    link_url: str
    link_text: str
    menu_settings_panels: list
    
# Method parameter and return types
class PageMethodTypes:
    menu_items: list
    current_page: 'Page'
    current_ancestor_ids: list[int]
    current_site: 'Site'
    check_for_children: bool
    allow_repeating_parents: bool
    current_level: int