Contrib Modules and Extensions

class AbstractForm(Page):
    """
    Base class for form pages with submission handling.
    
    Properties:
        thank_you_text (RichTextField): Message shown after successful submission
        from_address (str): Default sender email address
        to_address (str): Email address to send submissions to
        subject (str): Email subject line
    """
    thank_you_text: RichTextField
    from_address: str
    to_address: str
    subject: str
    
    def get_form_class(self):
        """Get the form class for this form page."""
    
    def get_form(self, *args, **kwargs):
        """Get form instance with data."""
    
    def process_form_submission(self, form):
        """Process valid form submission and return form submission object."""
    
    def render_landing_page(self, request, form_submission=None, *args, **kwargs):
        """Render thank you page after form submission."""

class AbstractFormField(Orderable):
    """
    Individual field definition for forms.
    
    Properties:
        label (str): Field label text
        field_type (str): Type of form field ('singleline', 'multiline', 'email', etc.)
        required (bool): Whether field is required
        choices (str): Choices for dropdown/radio fields (newline separated)
        default_value (str): Default field value
        help_text (str): Help text for the field
    """
    label: str
    field_type: str
    required: bool
    choices: str
    default_value: str
    help_text: str
    
    @property
    def clean_name(self):
        """Get cleaned field name for use in forms."""

class AbstractEmailForm(AbstractForm):
    """
    Form that emails submissions to specified addresses.
    """
    def process_form_submission(self, form):
        """Process submission and send email notification."""

class AbstractFormSubmission(models.Model):
    """
    Stores form submission data.
    
    Properties:
        form_data (JSONField): Submitted form data
        submit_time (datetime): When form was submitted
    """
    form_data: JSONField
    submit_time: datetime
    
    def get_data(self):
        """Get form data as dictionary."""

class Redirect(models.Model):
    """
    URL redirect configuration.
    
    Properties:
        old_path (str): Original URL path to redirect from
        site (Site): Site this redirect applies to
        is_permanent (bool): Whether redirect is permanent (301) or temporary (302)
        redirect_page (Page): Page to redirect to (optional)
        redirect_link (str): External URL to redirect to (optional)
    """
    old_path: str
    site: Site
    is_permanent: bool
    redirect_page: Page
    redirect_link: str
    
    def get_is_permanent(self):
        """Check if this is a permanent redirect."""
    
    @property
    def redirect_to(self):
        """Get the target URL for this redirect."""
    
    @classmethod
    def get_for_site(cls, site=None):
        """Get all redirects for a specific site."""

class BaseSiteSetting(models.Model):
    """
    Base class for site-specific settings.
    
    Properties:
        site (Site): Site these settings apply to
    """
    site: Site
    
    class Meta:
        abstract = True
    
    @classmethod
    def for_site(cls, site):
        """Get settings instance for a specific site."""

def register_setting(model=None, **kwargs):
    """
    Decorator to register a model as a site setting.
    
    Usage:
    @register_setting
    class SocialMediaSettings(BaseSiteSetting):
        facebook_url = models.URLField(blank=True)
    
    Parameters:
        model (Model): Model class to register
        icon (str): Icon name for admin interface
    """

class SettingsMenuItem:
    """Menu item for settings in admin interface."""
    
    def __init__(self, model, icon='cog', **kwargs):
        """Initialize settings menu item."""

def sitemap(request):
    """
    Generate XML sitemap for all live pages.
    
    Returns:
        HttpResponse: XML sitemap response
    """

class Sitemap:
    """
    Sitemap configuration class.
    
    Customize sitemap generation by subclassing.
    """
    def items(self):
        """Get items to include in sitemap."""
    
    def location(self, item):
        """Get URL for sitemap item."""
    
    def lastmod(self, item):
        """Get last modification date for item."""
    
    def changefreq(self, item):
        """Get change frequency for item."""
    
    def priority(self, item):
        """Get priority for item."""

class RoutablePageMixin:
    """
    Mixin that adds custom URL routing to pages.
    
    Allows pages to handle multiple URL patterns and views.
    """
    def serve(self, request, *args, **kwargs):
        """Enhanced serve method with route handling."""
    
    def reverse_subpage(self, name, args=None, kwargs=None):
        """Get URL for a named sub-route."""

def route(pattern, name=None):
    """
    Decorator to define custom routes within a page.
    
    Parameters:
        pattern (str): URL regex pattern
        name (str): Optional name for the route
    
    Usage:
    class BlogPage(RoutablePageMixin, Page):
        @route(r'^archive/(\d{4})/$', name='archive_year')
        def archive_year(self, request, year):
            return render(request, 'blog/archive.html', {'year': year})
    """

class TableBlock(StructBlock):
    """
    Block for creating editable tables in StreamField.
    
    Properties:
        table_options (dict): Configuration options for table editing
    """
    def __init__(self, required=True, help_text=None, table_options=None, **kwargs):
        """
        Initialize table block.
        
        Parameters:
            table_options (dict): Options like row/column headers, cell types
        """
    
    def render(self, value, context=None):
        """Render table as HTML."""

class TypedTableBlock(TableBlock):
    """
    Table block with column type definitions for structured data.
    
    Parameters:
        columns (list): List of column definitions with types
    """
    def __init__(self, columns, **kwargs):
        """
        Initialize typed table block.
        
        Parameters:
            columns (list): List of (name, block_type) tuples
        """

def register_snippet(model):
    """
    Decorator to register a model as a snippet for admin interface.
    
    Usage:
    @register_snippet
    class Category(models.Model):
        name = models.CharField(max_length=100)
    
    Parameters:
        model (Model): Django model to register as snippet
    """

class SnippetViewSet(ModelViewSet):
    """
    ViewSet for managing snippets in admin interface.
    
    Provides CRUD operations for snippet models.
    """
    def get_queryset(self):
        """Get queryset for snippet listing."""

class SnippetChooserBlock(ChooserBlock):
    """
    Block for choosing snippets in StreamField.
    
    Parameters:
        target_model (Model): Snippet model to choose from
    """
    def __init__(self, target_model, **kwargs):
        """Initialize snippet chooser block."""

class SearchPromotion(models.Model):
    """
    Promoted search result for specific queries.
    
    Properties:
        query (str): Search query to promote results for
        page (Page): Page to promote in results
        sort_order (int): Order of promotion in results
        description (str): Custom description for promoted result
    """
    query: str
    page: Page
    sort_order: int
    description: str
    
    @classmethod
    def get_for_query(cls, query_string):
        """Get promotions matching a search query."""

def purge_page_from_cache(page, backend_settings=None, backends=None):
    """
    Purge a specific page from frontend caches.
    
    Parameters:
        page (Page): Page to purge from cache
        backend_settings (dict): Cache backend configuration
        backends (list): List of cache backends to purge from
    """

def purge_pages_from_cache(pages, backend_settings=None, backends=None):
    """
    Purge multiple pages from frontend caches.
    
    Parameters:
        pages (QuerySet): Pages to purge from cache
        backend_settings (dict): Cache backend configuration
        backends (list): List of cache backends to purge from
    """

class CloudflareBackend:
    """Cache backend for Cloudflare CDN integration."""
    
    def __init__(self, config):
        """Initialize Cloudflare backend with API credentials."""
    
    def purge(self, urls):
        """Purge specific URLs from Cloudflare cache."""

class CloudfrontBackend:
    """Cache backend for AWS CloudFront CDN integration."""
    
    def __init__(self, config):
        """Initialize CloudFront backend with AWS credentials."""
    
    def purge(self, urls):
        """Create CloudFront invalidation for URLs."""

from wagtail.contrib.forms.models import AbstractEmailForm, AbstractFormField
from wagtail.contrib.forms.panels import FormSubmissionsPanel
from wagtail.admin.panels import FieldPanel, InlinePanel, MultiFieldPanel
from modelcluster.fields import ParentalKey

class FormField(AbstractFormField):
    """Custom form field with page relationship."""
    page = ParentalKey('ContactPage', on_delete=models.CASCADE, related_name='form_fields')

class ContactPage(AbstractEmailForm):
    """Contact form page with email notifications."""
    intro = RichTextField(blank=True)
    thank_you_text = RichTextField(blank=True)
    
    content_panels = AbstractEmailForm.content_panels + [
        FieldPanel('intro'),
        InlinePanel('form_fields', label="Form fields"),
        FieldPanel('thank_you_text'),
        MultiFieldPanel([
            FieldPanel('to_address', classname="col6"),
            FieldPanel('from_address', classname="col6"),
            FieldPanel('subject'),
        ], "Email Settings"),
    ]
    
    def get_form_fields(self):
        return self.form_fields.all()

# In templates
{% extends "base.html" %}
{% load wagtailcore_tags %}

{% block content %}
    <div class="contact-page">
        <h1>{{ page.title }}</h1>
        {{ page.intro|richtext }}
        
        <form action="{% pageurl page %}" method="post">
            {% csrf_token %}
            {% for field in form %}
                <div class="field">
                    {{ field.label_tag }}
                    {{ field }}
                    {{ field.errors }}
                </div>
            {% endfor %}
            <button type="submit">Send Message</button>
        </form>
    </div>
{% endblock %}

from wagtail.contrib.settings.models import BaseSiteSetting, register_setting
from wagtail.admin.panels import FieldPanel

@register_setting
class SocialMediaSettings(BaseSiteSetting):
    """Social media links and API keys."""
    facebook_url = models.URLField(blank=True, help_text='Facebook page URL')
    twitter_handle = models.CharField(max_length=100, blank=True)
    instagram_url = models.URLField(blank=True)
    google_analytics_id = models.CharField(max_length=100, blank=True)
    
    panels = [
        MultiFieldPanel([
            FieldPanel('facebook_url'),
            FieldPanel('twitter_handle'),
            FieldPanel('instagram_url'),
        ], heading='Social Media Links'),
        FieldPanel('google_analytics_id'),
    ]

# Usage in templates
{% load wagtailsettings_tags %}
{% get_settings "myapp.SocialMediaSettings" as social_settings %}

<footer>
    {% if social_settings.facebook_url %}
        <a href="{{ social_settings.facebook_url }}">Facebook</a>
    {% endif %}
    {% if social_settings.twitter_handle %}
        <a href="https://twitter.com/{{ social_settings.twitter_handle }}">Twitter</a>
    {% endif %}
</footer>

from wagtail.contrib.routable_page.models import RoutablePageMixin, route
from django.shortcuts import render

class BlogIndexPage(RoutablePageMixin, Page):
    """Blog index with custom routing for archives and tags."""
    
    def get_context(self, request):
        context = super().get_context(request)
        context['blog_posts'] = BlogPage.objects.child_of(self).live()
        return context
    
    @route(r'^$')
    def blog_index(self, request):
        """Default blog listing."""
        return self.serve(request)
    
    @route(r'^archive/(\d{4})/$', name='archive_year')
    def archive_year(self, request, year):
        """Blog posts for specific year."""
        posts = BlogPage.objects.child_of(self).live().filter(date__year=year)
        return render(request, 'blog/archive.html', {
            'page': self,
            'posts': posts,
            'year': year,
        })
    
    @route(r'^tag/([\w-]+)/$', name='tag')
    def tag_view(self, request, tag_slug):
        """Blog posts with specific tag."""
        posts = BlogPage.objects.child_of(self).live().filter(tags__slug=tag_slug)
        return render(request, 'blog/tag.html', {
            'page': self,
            'posts': posts,
            'tag': tag_slug,
        })
    
    def get_sitemap_urls(self, request=None):
        """Add custom routes to sitemap."""
        sitemap = super().get_sitemap_urls(request)
        
        # Add yearly archives
        years = BlogPage.objects.dates('date', 'year')
        for year in years:
            sitemap.append({
                'location': self.reverse_subpage('archive_year', args=[year.year]),
                'lastmod': BlogPage.objects.filter(date__year=year.year).latest('last_published_at').last_published_at,
            })
        
        return sitemap

# Template usage
<nav class="blog-nav">
    <a href="{% pageurl page %}">All Posts</a>
    <a href="{% pageurl page %}archive/2023/">2023 Archive</a>
    <a href="{% pageurl page %}tag/django/">Django Posts</a>
</nav>

from wagtail.snippets.models import register_snippet
from wagtail.admin.panels import FieldPanel
from wagtail.search import index

@register_snippet
class Category(models.Model):
    """Blog category snippet."""
    name = models.CharField(max_length=100)
    slug = models.SlugField(unique=True)
    description = models.TextField(blank=True)
    icon = models.CharField(max_length=50, blank=True)
    
    panels = [
        FieldPanel('name'),
        FieldPanel('slug'),
        FieldPanel('description'),
        FieldPanel('icon'),
    ]
    
    search_fields = [
        index.SearchField('name'),
        index.SearchField('description'),
    ]
    
    def __str__(self):
        return self.name
    
    class Meta:
        ordering = ['name']

@register_snippet
class Author(models.Model):
    """Author snippet with contact information."""
    name = models.CharField(max_length=100)
    bio = models.TextField()
    photo = models.ForeignKey('wagtailimages.Image', on_delete=models.SET_NULL, null=True, blank=True)
    email = models.EmailField(blank=True)
    website = models.URLField(blank=True)
    
    panels = [
        FieldPanel('name'),
        FieldPanel('bio'),
        FieldPanel('photo'),
        FieldPanel('email'),
        FieldPanel('website'),
    ]
    
    def __str__(self):
        return self.name

# Using snippets in pages
class BlogPage(Page):
    category = models.ForeignKey(Category, on_delete=models.SET_NULL, null=True, blank=True)
    author = models.ForeignKey(Author, on_delete=models.SET_NULL, null=True, blank=True)
    
    content_panels = Page.content_panels + [
        FieldPanel('category'),
        FieldPanel('author'),
    ]

# In StreamField blocks
from wagtail.snippets.blocks import SnippetChooserBlock

class ContentBlock(StructBlock):
    heading = CharBlock()
    text = RichTextBlock()
    category = SnippetChooserBlock(Category, required=False)

from wagtail.contrib.table_block.blocks import TableBlock

class ContentPage(Page):
    """Page with table support."""
    body = StreamField([
        ('paragraph', RichTextBlock()),
        ('table', TableBlock(table_options={
            'minSpareRows': 0,
            'startRows': 4,
            'startCols': 4,
            'colHeaders': False,
            'rowHeaders': False,
            'contextMenu': True,
            'editor': 'text',
            'stretchH': 'all',
            'height': 216,
            'language': 'en',
            'renderer': 'text',
            'autoColumnSize': False,
        })),
    ])
    
    content_panels = Page.content_panels + [
        FieldPanel('body'),
    ]

# Custom table template (templates/table_block.html)
<table class="data-table">
    {% for row in self.data %}
    <tr>
        {% for cell in row %}
        <td>{{ cell }}</td>
        {% endfor %}
    </tr>
    {% endfor %}
</table>