From 176574a9cce01b37aa68ffbb88e7f80291e30934 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Emil=20Stenstro=CC=88m?= <em@kth.se>
Date: Sun, 14 Jun 2015 14:29:20 +0200
Subject: [PATCH] Add component_dependencies template tag.

---
 django_components/templatetags/__init__.py    |  0
 .../templatetags/component_tags.py            | 12 +++++++++
 tests/test_templatetags.py                    | 27 +++++++++++++++++++
 3 files changed, 39 insertions(+)
 create mode 100644 django_components/templatetags/__init__.py
 create mode 100644 django_components/templatetags/component_tags.py
 create mode 100644 tests/test_templatetags.py

diff --git a/django_components/templatetags/__init__.py b/django_components/templatetags/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/django_components/templatetags/component_tags.py b/django_components/templatetags/component_tags.py
new file mode 100644
index 00000000..108a78f4
--- /dev/null
+++ b/django_components/templatetags/component_tags.py
@@ -0,0 +1,12 @@
+from django import template
+from django_components.component import registry
+
+register = template.Library()
+
+@register.simple_tag(name="component_dependencies")
+def component_dependencies_tag():
+    out = []
+    for comp in registry._registry.values():
+        out.append(comp.render_dependencies())
+
+    return "\n".join(out)
diff --git a/tests/test_templatetags.py b/tests/test_templatetags.py
new file mode 100644
index 00000000..fb8a608f
--- /dev/null
+++ b/tests/test_templatetags.py
@@ -0,0 +1,27 @@
+from textwrap import dedent
+import unittest
+from django.template import Template, Context
+from django_components import component
+from .django_test_setup import *  # NOQA
+
+class SimpleComponent(component.Component):
+    def context(self, variable=None):
+        return {
+            "variable": variable,
+        }
+
+    class Media:
+        template = "simple_template.html"
+        css = {"all": "style.css"}
+        js = ("script.js",)
+
+class ComponentTemplateTagTest(unittest.TestCase):
+    def test_component_dependencies(self):
+        component.registry.register(name="testcomponent", component=SimpleComponent)
+
+        template = Template("{% load component_tags %}{% component_dependencies %}")
+        rendered = template.render(Context())
+        self.assertEqual(rendered, dedent("""
+            <link href="style.css" type="text/css" media="all" rel="stylesheet" />
+            <script type="text/javascript" src="script.js"></script>
+        """).strip())