Access checking based on role

Adopting the usual permission checking mechanisms based on role to access different areas/views of the website.

app/utils/decorators.py

+from functools import wraps
+
+from flask import url_for
+from flask_login import current_user
+from werkzeug.utils import redirect
+
+from app.constants import STAFF, STUDENT
+
+
+def staff_only(func):
+    @wraps(func)
+    def inner(*args, **kwargs):
+        if current_user.role == STAFF:
+            return func(*args, **kwargs)
+        return redirect(url_for(f"{current_user.role}.projects"))
+
+    return inner
+
+
+def students_only(func):
+    @wraps(func)
+    def inner(*args, **kwargs):
+        if current_user.role == STUDENT:
+            return func(*args, **kwargs)
+        return redirect(url_for(f"{current_user.role}.projects"))
+
+    return inner