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HTML / CSS / JS

# blog/templatetags/blog_extras.py
from django import template
from django.utils.html import format_html
from ..models import Post, Tag

# --- Simple filter ---
@register.filter(name='reading_time')
def reading_time(text):
    """Estimate reading time in minutes (200 wpm average)."""
    word_count = len(text.split())
    minutes    = max(1, round(word_count / 200))
    return f'{minutes} min read'

# --- Simple tag ---
@register.simple_tag
def total_posts():
    """Return the total number of published posts."""
    return Post.published.count()

# --- Inclusion tag ---
@register.inclusion_tag('blog/partials/latest_posts.html')
def show_latest_posts(count=5):
    """Render the latest N posts as a sidebar widget."""
    latest = Post.published.order_by('-published_at')[:count]
    return {'latest_posts': latest}

# --- Usage in a template ---
# {% load blog_extras %}
#
# <p>{{ post.body|reading_time }}</p>
#
# <p>Total posts: {% total_posts %}</p>
#
# {% show_latest_posts count=3 %}