From d88c4632cd77f10258f92433384cd18ab92b7af1 Mon Sep 17 00:00:00 2001
From: "Casper V. Kristensen" <casper@vkristensen.dk>
Date: Sun, 12 Jan 2020 03:40:19 +0100
Subject: [PATCH] Add (simple) Bootstrap 4 paginator helper tag.

---
 .../base/templates/bootstrap_paginator.html   | 49 +++++++++++++++++++
 drakul/base/templatetags/base_extras.py       |  8 +++
 2 files changed, 57 insertions(+)
 create mode 100644 drakul/base/templates/bootstrap_paginator.html

diff --git a/drakul/base/templates/bootstrap_paginator.html b/drakul/base/templates/bootstrap_paginator.html
new file mode 100644
index 0000000..0158998
--- /dev/null
+++ b/drakul/base/templates/bootstrap_paginator.html
@@ -0,0 +1,49 @@
+{% load base_extras %}
+
+
+{% if is_paginated %}
+<nav aria-label="Page navigation">
+    <ul class="pagination">
+    {% if page_obj.has_previous %}
+        <li class="page-item">
+            <a class="page-link" href="?page={{ page_obj.previous_page_number }}" aria-label="Previous">
+                <span aria-hidden="true">&laquo;</span>
+            </a>
+        </li>
+    {% else %}
+        <li class="page-item disabled">
+            <span class="page-link">&laquo;</span>
+        </li>
+    {% endif %}
+
+    {% paginator_pages paginator.page_range page_obj.number as pages %}
+    {% for i in pages %}
+        {% if page_obj.number == i %}
+            <li class="page-item active" aria-current="page">
+                <span class="page-link">
+                    {{ i }}
+                    <span class="sr-only">(current)</span>
+                </span>
+            </li>
+        {% else %}
+            <li class="page-item">
+                <a class="page-link" href="?page={{ i }}">{{ i }}</a>
+            </li>
+        {% endif %}
+    {% endfor %}
+
+    {% if page_obj.has_next %}
+        <li class="page-item">
+            <a class="page-link" href="?page={{ page_obj.next_page_number }}" aria-label="Next">
+                <span aria-hidden="true">&raquo;</span>
+            </a>
+        </li>
+    {% else %}
+        <li class="page-item disabled">
+            <span class="page-link">&raquo;</span>
+        </li>
+    {% endif %}
+
+    </ul>
+</nav>
+{% endif %}
diff --git a/drakul/base/templatetags/base_extras.py b/drakul/base/templatetags/base_extras.py
index d0b1dd3..d6276a1 100644
--- a/drakul/base/templatetags/base_extras.py
+++ b/drakul/base/templatetags/base_extras.py
@@ -8,3 +8,11 @@ def active(context, url_name):
     if context["request"].resolver_match.url_name == url_name:
         return "active"
     return ""
+
+
+@register.simple_tag()
+def paginator_pages(page_range: range, current_number: int, margin=5):
+    return range(
+        max(page_range.start, current_number - margin),
+        min(page_range.stop, current_number + margin + 1)
+    )