Merge branch 'main' of github.com:basxsoftwareassociation/bread

bread/views/error.py

@@ -0,0 +1,112 @@
+import sys
+from typing import Union
+
+import htmlgenerator as hg
+from django.utils.translation import gettext_lazy as _
+
+from bread.layout.components.button import Button
+from bread.utils import Link, aslayout
+
+
+@aslayout
+def error_layout(
+    request,
+    status_code: int,
+    status_title: str,
+    description: Union[str, hg.BaseElement],
+    exception_detail: str = None,
+):
+    return hg.BaseElement(
+        hg.H1(f"{status_code}: {status_title}", style="margin-bottom: 1rem;"),
+        hg.P(
+            description,
+            style="margin-bottom: 1rem;",
+        ),
+        hg.If(
+            exception_detail,
+            hg.BaseElement(
+                hg.H4("Detail", style="margin-bottom: 1rem;"),
+                hg.DIV(
+                    exception_detail,
+                    style=(
+                        "border: 1px solid grey;"
+                        "padding: 1rem;"
+                        "font-family: monospace;"
+                        "margin-bottom: 1rem;"
+                    ),
+                ),
+            ),
+        ),
+        Button.fromlink(
+            Link(
+                label=_("Back to homepage"),
+                href=hg.F(lambda c: c["request"].META["SCRIPT_NAME"] or "/"),
+            )
+        ),
+    )
+
+
+def view400(request, exception):
+    response = error_layout(
+        request,
+        status_code=400,
+        status_title=_("Bad request"),
+        description=_("The server cannot process the request due to a client error."),
+        exception_detail=exception.message if hasattr(exception, "message") else None,
+    )
+    response.status_code = 400
+
+    return response
+
+
+def view403(request, exception):
+    response = error_layout(
+        request,
+        status_code=403,
+        status_title=_("Forbidden"),
+        description=_("You do not have permission to access this resource."),
+        exception_detail=exception.message if hasattr(exception, "message") else None,
+    )
+    response.status_code = 403
+
+    return response
+
+
+def view404(request, exception):
+    response = error_layout(
+        request,
+        status_code=404,
+        status_title=_("Page not found"),
+        description=hg.BaseElement(
+            hg.mark_safe(
+                _("The path %s could not be found.")
+                % f"<strong>{request.path}</strong>"
+            )
+        ),
+        exception_detail=exception.message if hasattr(exception, "message") else None,
+    )
+    response.status_code = 404
+
+    return response
+
+
+def view500(request):
+    exec_info = sys.exc_info()
+    response = error_layout(
+        request,
+        status_code=500,
+        status_title=_("Internal Server Error"),
+        description=hg.BaseElement(
+            hg.mark_safe(
+                _(
+                    "A problem has occurred while loading the page at %s."
+                    "<br>If the problem persists, please contact an administrator."
+                )
+                % f"<strong>{request.path}</strong>"
+            )
+        ),
+        exception_detail=f"{str(exec_info[0].__name__)}: {exec_info[1]}",
+    )
+    response.status_code = 500
+
+    return response