Require admin permissions to access create project endpoint

When ADMIN_PASSWORD is not empty, project creation form on the
home page will be replaced by a link to the create project endpoint
so one is able to enter the admin password before filling the form

budget/templates/home.html

@@ -28,6 +28,9 @@
             </form>
         </div>
         <div class="col-3 offset-md-1">
+            {% if is_admin_mode_enabled %}
+            <a href="{{ url_for(".create_project") }}">...{{ _("or create a new one") }}</a>
+            {% else %}
             <form id="creation-form" class="form-horizontal" action="{{ url_for(".create_project") }}" method="post">
                 <fieldset class="form-group">
                     <legend>...{{ _("or create a new one") }}</legend>
@@ -37,6 +40,7 @@
                     <button class="btn" type="submit">{{ _("let's get started") }}</button>
                 </div>
             </form>
+            {% endif %}
         </main>
     </div>
 {% endblock %}

budget/tests/tests.py

@@ -44,6 +44,8 @@ class TestCase(unittest.TestCase):
         # clean after testing
         models.db.session.remove()
         models.db.drop_all()
+        # reconfigure app with default settings
+        run.configure()
 
     def login(self, project, password=None, test_client=None):
         password = password or project
@@ -373,6 +375,25 @@ class BudgetTestCase(TestCase):
             c.get("/exit")
             self.assertNotIn('raclette', session)
 
+    def test_admin_authentication(self):
+        run.app.config['ADMIN_PASSWORD'] = "pass"
+
+        # test the redirection to the authentication page when trying to access admin endpoints
+        resp = self.app.get("/create")
+        self.assertIn('<a href="/admin?goto=%2Fcreate">', resp.data.decode('utf-8'))
+
+        # test right password
+        resp = self.app.post("/admin?goto=%2Fcreate", data={'admin_password': 'pass'})
+        self.assertIn('<a href="/create">/create</a>', resp.data.decode('utf-8'))
+
+        # test wrong password
+        resp = self.app.post("/admin?goto=%2Fcreate", data={'admin_password': 'wrong'})
+        self.assertNotIn('<a href="/create">/create</a>', resp.data.decode('utf-8'))
+
+        # test empty password
+        resp = self.app.post("/admin?goto=%2Fcreate", data={'admin_password': ''})
+        self.assertNotIn('<a href="/create">/create</a>', resp.data.decode('utf-8'))
+
     def test_manage_bills(self):
         self.post_project("raclette")
 

budget/web.py

@@ -152,14 +152,18 @@ def authenticate(project_id=None):
 def home():
     project_form = ProjectForm()
     auth_form = AuthenticationForm()
+    # If ADMIN_PASSWORD is empty we consider that admin mode is disabled
+    is_admin_mode_enabled = bool(current_app.config['ADMIN_PASSWORD'])
     is_demo_project_activated = current_app.config['ACTIVATE_DEMO_PROJECT']
 
     return render_template("home.html", project_form=project_form,
                            is_demo_project_activated=is_demo_project_activated,
+                           is_admin_mode_enabled=is_admin_mode_enabled,
                            auth_form=auth_form, session=session)
 
 
 @main.route("/create", methods=["GET", "POST"])
+@requires_admin
 def create_project():
     form = ProjectForm()
     if request.method == "GET" and 'project_id' in request.values: