Fixed semester changing and activeSemester

advlabdb/routes.py

@@ -1,13 +1,11 @@
 from advlabdb import app, user_datastore
-from flask import render_template, request, url_for, flash, redirect
+from flask import render_template, request, url_for, flash, redirect, session
 from flask_security import auth_required, roles_required, hash_password, current_user
 
 from advlabdb.utils import *
 from advlabdb.models import *
 from advlabdb.forms import *
 
-activeSemester_id = 0
-
 
 @app.context_processor
 def util_processor():
@@ -19,6 +17,15 @@ def util_processor():
                          str(semester.id) + '">' + semester.label + '</a></li>')
         return items
 
+    def activeSemesterLabel():
+        lastSemesterId = Semester.query.all()[-1].id
+        if "activeSemesterId" not in session:
+            session["activeSemesterId"] = lastSemesterId
+        elif session["activeSemesterId"] != lastSemesterId:
+            flash(f"Warning: You are in the old semester {Semester.query.get(session['activeSemesterId']).label}!",
+                  "danger")
+        return Semester.query.get(session["activeSemesterId"]).label
+
     def navbarItems(title):
         adminPages = ["Students", "Assistants", "Experiments", "Appointments", "Groups", "Users", "Semesters"]
         assistantPages = ["Students", "Assistants", "Experiments", "Appointments", "Groups"]
@@ -49,7 +56,7 @@ def util_processor():
         return items
 
     return dict(semesterDropDownItems=semesterDropDownItems,
-                activeSemesterLabel=Semester.query.get(activeSemester_id).label,
+                activeSemesterLabel=activeSemesterLabel,
                 navbarItems=navbarItems,
                 current_user=current_user,
                 )
@@ -57,8 +64,6 @@ def util_processor():
 
 @app.route("/")
 def index():
-    global activeSemester_id
-    activeSemester_id = Semester.query.all()[-1].id
     title = "Index"
     return render_template(titleToTemplate(title) + ".html",
                            title=title,
@@ -68,7 +73,7 @@ def index():
 @app.route("/students")
 @roles_required("admin")
 def students():
-    semester = Semester.query.get(activeSemester_id)
+    semester = Semester.query.get(session["activeSemesterId"])
     parts = semester.parts
     tables = []
     tablesLabels = []
@@ -124,7 +129,7 @@ def assistants():
 @app.route("/experiments")
 @roles_required("admin")
 def experiments():
-    semester = Semester.query.get(activeSemester_id)
+    semester = Semester.query.get(session["activeSemesterId"])
     parts = semester.parts
     tables = []
     tablesLabels = []
@@ -159,7 +164,7 @@ def appointments():
 @app.route("/groups")
 @roles_required("admin")
 def groups():
-    semester = Semester.query.get(activeSemester_id)
+    semester = Semester.query.get(session["activeSemesterId"])
     parts = semester.parts
     tables = []
     tablesLabels = []
@@ -203,8 +208,7 @@ def users():
 @app.route("/set_semester", methods=["GET"])
 @auth_required()
 def set_semester():
-    global activeSemester_id
-    activeSemester_id = int(request.args.get("semester_id"))
+    session["activeSemesterId"] = int(request.args.get("semester_id"))
     title = "Index"
     return render_template(titleToTemplate(title) + ".html",
                            title=title,

advlabdb/templates/layout.html

@@ -35,7 +35,7 @@
             {% if current_user.is_authenticated %}
             <li class="nav-item dropdown">
               <a class="nav-link dropdown-toggle" id="navbarDropdownMenuLink" role="button" data-bs-toggle="dropdown" aria-expanded="false">
-                Semester {{activeSemesterLabel}}
+                Semester {{activeSemesterLabel()}}
               </a>
               <ul class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
                 {% for item in semesterDropDownItems() %}
@@ -50,11 +50,11 @@
     </nav>
     <div class="container-fluid">
       <br>
-      {% with messages = get_flashed_messages(with_categories=true) %}
+      {% with messages = get_flashed_messages(with_categories=True) %}
         {% if messages %}
           {% for category, message in messages %}
             <div class="alert alert-{{category}}">
-              {{ message }}
+              {{message}}
             </div>
           {% endfor %}
         {% endif %}