feat: Edit on GitHub button for content articles

- Using `if pages` to check whether the page is an article or category
  doesn't work for /pages/guides
- I still need to modify the styling and position of the button a bit
- Should probably just use a static method and put src_url as context
  instead of having a template tag

3 files changed, 23 insertions, 0 deletions

diff --git a/pydis_site/apps/content/templatetags/__init__.py b/pydis_site/apps/content/templatetags/__init__.py
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/pydis_site/apps/content/templatetags/__init__.py
diff --git a/pydis_site/apps/content/templatetags/page_src.py b/pydis_site/apps/content/templatetags/page_src.py
new file mode 100644
index 00000000..33f24b82
--- /dev/null
+++ b/pydis_site/apps/content/templatetags/page_src.py
@@ -0,0 +1,22 @@
+from django import template
+
+
+register = template.Library()
+
+
[email protected]()
+def page_src_url(request_path: str) -> str:
+    """
+    Return the corresponding GitHub source URL for the current content article.
+
+    request_path is the relative path of an article, as returned by `request.path` in templates.
+
+    For example: /pages/rules/ would return:
+    https://github.com/python-discord/site/tree/main/pydis_site/apps/content/resources/rules.md
+    """
+    src_url = request_path.replace(
+        "/pages/",
+        "https://github.com/python-discord/site/tree/main/pydis_site/apps/content/resources/",
+    )
+    src_url = src_url[:-1] + ".md"
+    return src_url
diff --git a/pydis_site/templates/content/base.html b/pydis_site/templates/content/base.html
index 2fd721a3..8f6fd1d8 100644
--- a/pydis_site/templates/content/base.html
+++ b/pydis_site/templates/content/base.html
@@ -1,5 +1,6 @@
 {% extends 'base/base.html' %}
 {% load static %}
+{% load page_src %}
 
 {% block title %}{{ page_title }}{% endblock %}
 {% block head %}