1 files changed, 34 insertions, 0 deletions
diff --git a/core/uris.py b/core/uris.py
new file mode 100644
index 0000000..9ed2a32
--- /dev/null
+++ b/core/uris.py
@@ -0,0 +1,34 @@
+from urllib.parse import urljoin
+
+from django.conf import settings
+
+
+class RelativeAbsoluteUrl:
+    """
+    Represents a URL that can have both "relative" and "absolute" forms
+    for various use either locally or remotely.
+    """
+
+    absolute: str
+    relative: str
+
+    def __init__(self, absolute: str, relative: str | None = None):
+        if "://" not in absolute:
+            raise ValueError(f"Absolute URL {absolute!r} is not absolute!")
+        self.absolute = absolute
+        self.relative = relative or absolute
+
+
+class AutoAbsoluteUrl(RelativeAbsoluteUrl):
+    """
+    Automatically makes the absolute variant by using either settings.MAIN_DOMAIN
+    or a passed identity's URI domain.
+    """
+
+    def __init__(self, relative: str, identity=None):
+        self.relative = relative
+        if identity:
+            absolute_prefix = f"https://{identity.domain.uri_domain}/"
+        else:
+            absolute_prefix = f"https://{settings.MAIN_DOMAIN}/"
+        self.absolute = urljoin(absolute_prefix, self.relative)