From 26050c0bf6abdb7a1aaf87bc28ee61d353a70e3f Mon Sep 17 00:00:00 2001
From: Corentin <corentin.lemaire@etu.uca.fr>
Date: Fri, 1 Nov 2024 18:45:40 +0100
Subject: [PATCH] Added styles to pages + starting to refactor code to multiple
 files

---
 CourseMaster/settings.py                 |   2 +-
 README.md                                |  10 +-
 redis_app/static/redis_app/style.css     | 202 ++++++++++++++++
 redis_app/templates/courses.html         |  62 +++--
 redis_app/templates/create.html          |  63 +++--
 redis_app/templates/details.html         |  84 ++++---
 redis_app/templates/home.html            |  26 +-
 redis_app/templates/login.html           |  45 ++--
 redis_app/templates/notifications.html   |  21 +-
 redis_app/templates/profile.html         |  45 ++--
 redis_app/templates/publish_message.html |  55 +++--
 redis_app/templates/register.html        |  45 ++--
 redis_app/templates/search.html          |  49 ++--
 redis_app/templates/update.html          |  83 ++++---
 redis_app/utils/model.py                 | 230 ++++++++++++++++++
 redis_app/views.py                       | 288 +++--------------------
 16 files changed, 840 insertions(+), 470 deletions(-)
 create mode 100644 redis_app/static/redis_app/style.css
 create mode 100644 redis_app/utils/model.py

diff --git a/CourseMaster/settings.py b/CourseMaster/settings.py
index f568ec2..105f98d 100644
--- a/CourseMaster/settings.py
+++ b/CourseMaster/settings.py
@@ -132,7 +132,7 @@ USE_TZ = True
 # Static files (CSS, JavaScript, Images)
 # https://docs.djangoproject.com/en/4.2/howto/static-files/
 
-STATIC_URL = 'static/'
+STATIC_URL = '/static/'
 
 # Default primary key field type
 # https://docs.djangoproject.com/en/4.2/ref/settings/#default-auto-field
diff --git a/README.md b/README.md
index 57e711c..b263ecf 100644
--- a/README.md
+++ b/README.md
@@ -84,16 +84,16 @@ OR
 
 ### Expiration
 
-Expiration of the course: The course expires after 2 minutes.
+Expiration of the course: The course expires after 5 minutes. If a student register to the course, it add 1 minute.
 
 ---
 
-### Design
+### Students management
 
-Design is not existing yet.
+As a teacher, you can't manage students registered to your course.
 
 ---
 
-### Students management
+### Searching
 
-As a teacher, you can't manage students registered to your course.
\ No newline at end of file
+The search looks for title, description and level fo the course. There's no advanced search for the moment.
\ No newline at end of file
diff --git a/redis_app/static/redis_app/style.css b/redis_app/static/redis_app/style.css
new file mode 100644
index 0000000..ec83e4f
--- /dev/null
+++ b/redis_app/static/redis_app/style.css
@@ -0,0 +1,202 @@
+body {
+    margin: 0;
+    font-family: Arial, sans-serif;
+    color: #333;
+    background-color: #f4f4f9;
+    text-align: center;
+}
+
+nav {
+    background-color: #333;
+    padding: 1rem;
+    display: flex;
+    justify-content: center;
+}
+
+nav a {
+    color: white;
+    text-decoration: none;
+    margin: 0 1rem;
+    padding: 0.5rem 1rem;
+    font-family: Arial, sans-serif;
+    font-size: 1rem;
+    border-radius: 4px;
+    transition: background-color 0.3s ease, color 0.3s ease;
+}
+
+nav a:hover {
+    background-color: #555;
+    color: #f5f5f5;
+}
+
+nav a:active {
+    background-color: #777;
+}
+
+p.no-courses {
+    text-align: center;
+    color: #777;
+    font-size: 1.2rem;
+    font-style: italic;
+}
+
+.body a, .submit {
+    display: inline-block;
+    padding: 0.7rem 0.8rem;
+    background-color: #4a90e2;
+    color: white;
+    text-decoration: none;
+    border-radius: 5px;
+    font-size: 1rem;
+    text-align: center;
+    transition: background-color 0.3s ease;
+}
+
+.body a {
+    margin: .5rem;
+}
+
+.body a:hover, .submit:hover {
+    background-color: #357abd;
+}
+
+.body {
+    margin-top: 2rem;
+    display: flex;
+    justify-content: center;
+}
+
+.container {
+    width: 60%;
+    display: flex;
+    flex-direction: column;
+    flex-wrap: wrap;
+    justify-content: center;
+    align-items: center;
+}
+
+form {
+    width: 500px;
+    padding: 1.5rem;
+    background-color: #f7f7f7;
+    border-radius: 8px;
+    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
+    font-family: Arial, sans-serif;
+}
+
+fieldset {
+    border: none;
+    padding: 0;
+    margin: 0;
+}
+
+label {
+    font-weight: bold;
+    margin-top: 1rem;
+    display: block;
+    color: #555;
+}
+
+h1 {
+    margin-top: 0;
+    margin-bottom: 0;
+}
+
+legend h1 {
+    text-align: center;
+    font-size: 1.8rem;
+    color: #333;
+    margin-bottom: 1rem;
+}
+
+input, textarea, select {
+    padding: 0.6rem;
+    margin-top: 0.5rem;
+    border: 1px solid #ccc;
+    border-radius: 4px;
+    box-sizing: border-box;
+    font-size: 1rem;
+}
+
+.input, textarea, select {
+    width: 100%;
+}
+
+textarea {
+    height: 100px;
+    resize: vertical;
+}
+
+.error-message {
+    background-color: #ee332d;
+    color: white;
+    width: 100%;
+    padding: 15px 0;
+    border-radius: 5px;
+    font-weight: bold;
+    text-align: center;
+    margin-top: 0.5rem;
+}
+
+.success-message {
+    background-color: #51c961;
+    color: white;
+    width: 100%;
+    padding: 15px 0;
+    border-radius: 5px;
+    font-weight: bold;
+    text-align: center;
+    margin-top: 0.5rem;
+}
+
+.submit-container {
+    display: flex;
+    flex-direction: column;
+    justify-content: end;
+    align-items: end;
+}
+
+.div-container {
+    width: 500px;
+    padding: 1.5rem;
+    background-color: #f7f7f7;
+    border-radius: 8px;
+    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
+    font-family: Arial, sans-serif;
+}
+
+.create-container {
+    display: flex;
+    justify-content: end;
+    align-items: end;
+}
+
+.plus {
+    font-size: 30px;
+    font-weight: bold;
+    padding: 0;
+}
+
+.create-course {
+    padding: 0 10 !important;
+    display: flex !important;
+    align-items: center !important;
+    justify-content: center !important;
+    flex-direction: row !important;
+    height: auto;
+}
+
+.create-course>p {
+    margin: 0 5px 0 0 !important;
+}
+
+.notifications {
+    display: flex;
+    justify-content: space-between;
+    flex-direction: row;
+}
+
+.notifications h1 {
+    vertical-align: middle;
+    line-height: 50px;
+}
\ No newline at end of file
diff --git a/redis_app/templates/courses.html b/redis_app/templates/courses.html
index de03077..bf6d2d1 100644
--- a/redis_app/templates/courses.html
+++ b/redis_app/templates/courses.html
@@ -1,4 +1,8 @@
 <html>
+    <head>
+        {% load static %}
+        <link rel="stylesheet" href="{% static 'redis_app/style.css' %}">
+    </head>
     <body>
         <nav>
             <a href="{% url 'home' %}">Home</a>
@@ -16,22 +20,46 @@
                 <a href="{% url 'logout' %}">Logout</a>
             {% endif %}
         </nav>
-        <h1>Courses for {{ person.name }}</h1>
-        {% if courses %}
-            {% for course in courses %}
-                <a href="{% url 'details' course.id %}">{{ course.title }}</a>
-            {% endfor %}
-        {% else %}
-            <p>No course yet</p>
-        {% endif %}
-        <p>
-            Register to a course by <a href="{% url 'search' %}">Searching</a>
-        </p>
-        <br/>
-        {% if person %}
-            {% if person.role == "Teacher" %}
-                <a href="{% url 'create_course' %}">Create</a>
-            {% endif %}
-        {% endif %}
+        <div class="body">
+            <div class="container">
+                <div class="div-container">
+                    <div class="create-container">
+                        {% if error_message %}
+                            <p class="error-message">{{ error_message }}</p>
+                        {% endif %}
+                        {% if success_message %}
+                            <p class="success-message">{{ success_message }}</p>
+                        {% endif %}
+                        {% if person %}
+                            {% if person.role == "Teacher" %}
+                                <div>
+                                    <a href="{% url 'create_course' %}" class="create-course">
+                                        <p class="plus">
+                                            +
+                                        </p>
+                                        <p>
+                                            Create
+                                        </p>
+                                    </a>
+                                </div>
+                            {% endif %}
+                        {% endif %}
+                    </div>
+                    <h1>Courses for {{ person.name }}</h1>
+                    {% if courses %}
+                        <div class="courses">
+                            {% for course in courses %}
+                                <a href="{% url 'details' course.id %}" class="course-link">{{ course.title }}</a>
+                            {% endfor %}
+                        </div>
+                    {% else %}
+                        <p class="no-courses">No course yet</p>
+                    {% endif %}
+                    <p class="register-link">
+                        Register to a course by <a href="{% url 'search' %}">Searching</a>
+                    </p>
+                </div>
+            </div>
+        </div>
     </body>
 </html>
\ No newline at end of file
diff --git a/redis_app/templates/create.html b/redis_app/templates/create.html
index 472b5e4..3c512a0 100644
--- a/redis_app/templates/create.html
+++ b/redis_app/templates/create.html
@@ -1,4 +1,8 @@
 <html>
+    <head>
+        {% load static %}
+        <link rel="stylesheet" href="{% static 'redis_app/style.css' %}">
+    </head>
     <body>
         <nav>
             <a href="{% url 'home' %}">Home</a>
@@ -16,33 +20,42 @@
                 <a href="{% url 'logout' %}">Logout</a>
             {% endif %}
         </nav>
-        <form action="{% url 'create_course_form' %}" method="POST">
-            {% csrf_token %}
-            <fieldset>
-                <legend><h1>Create a course</h1></legend>
-                
-                {% if error_message %}
-                    {{ error_message }}
-                {% endif %}
-                
-                <label for="title">Course Title</label><br>
-                <input type="text" name="title" id="title" required><br/>
+        <div class="body">
+            <div class="container">
+                <form action="{% url 'create_course_form' %}" method="POST">
+                    {% csrf_token %}
+                    <fieldset>
+                        <legend><h1>Create a course</h1></legend>
+                        
+                        {% if error_message %}
+                            <p class="error-message">{{ error_message }}</p>
+                        {% endif %}
+                        {% if success_message %}
+                            <p class="success-message">{{ success_message }}</p>
+                        {% endif %}
+                        
+                        <label for="title">Course Title</label>
+                        <input type="text" name="title" id="title" class="input" required>
 
-                <label for="summary">Course Summary</label><br>
-                <textarea name="summary" id="summary" required></textarea><br/>
+                        <label for="summary">Course Summary</label>
+                        <textarea name="summary" id="summary" required></textarea>
 
-                <label for="level">Course Level</label><br>
-                <select name="level" id="level" required>
-                    <option value="Beginner">Beginner</option>
-                    <option value="Intermediate">Intermediate</option>
-                    <option value="Advanced">Advanced</option>
-                </select><br/>
+                        <label for="level">Course Level</label>
+                        <select name="level" id="level" required>
+                            <option value="Beginner">Beginner</option>
+                            <option value="Intermediate">Intermediate</option>
+                            <option value="Advanced">Advanced</option>
+                        </select>
 
-                <label for="places">Number of Places</label><br>
-                <input type="number" name="places" id="places" min="1" required><br/>
-            </fieldset>
-            
-            <input type="submit" value="Create Course">
-        </form>
+                        <label for="places" class="input">Number of Places</label>
+                        <input type="number" name="places" id="places" min="1" class="input" required>
+                    </fieldset>
+                    
+                    <div class="submit-container">
+                        <input type="submit" value="Create Course" class="submit">
+                    </div>
+                </form>
+            </div>
+        </div>
     </body>
 </html>
diff --git a/redis_app/templates/details.html b/redis_app/templates/details.html
index 553f672..f6cf2e4 100644
--- a/redis_app/templates/details.html
+++ b/redis_app/templates/details.html
@@ -1,4 +1,8 @@
 <html>
+    <head>
+        {% load static %}
+        <link rel="stylesheet" href="{% static 'redis_app/style.css' %}">
+    </head>
     <body>
         <nav>
             <a href="{% url 'home' %}">Home</a>
@@ -16,44 +20,50 @@
                 <a href="{% url 'logout' %}">Logout</a>
             {% endif %}
         </nav>
-        {% if error_message %}
-            {{ error_message }}
-        {% endif %}
-        {% if success_message %}
-            {{ success_message }}
-        {% endif %}
-        {% if course %}
-            <h1>Welcome in the course {{ course.title }}!</h1>
-            <p>
-                {{ course.summary }}
-            </p>
-            <p>
-                This course is for {{ course.getLevel }} students
-            </p>
-            <p>
-                There's only {{ course.places }} places
-            </p>
-            <p>
-                The course has been created by {{ course.teacher_name }}
-            </p>
-        {% else %}
-            <h1>No course found!</h1>
-        {% endif %}
-        {% if person %}
-            {% if person.role == "Teacher" %}
-                <a href="{% url 'delete_course' course.id %}">Delete</a>
-                <a href="{% url 'update_course' course.id %}">Update</a>
-            {% else %}
-                {% if register %}
-                    <a href="{% url 'course_unregister' course.id %}">Unregister</a>
-                {% else %}
-                    {% if full == False %}
-                        <a href="{% url 'course_register' course.id %}">Register</a>
+        <div class="body">
+            <div class="container">
+                <div class="div-container">
+                    {% if error_message %}
+                        <p class="error-message">{{ error_message }}</p>
+                    {% endif %}
+                    {% if success_message %}
+                        <p class="success-message">{{ success_message }}</p>
+                    {% endif %}
+                    {% if course %}
+                        <h1>Welcome in the course {{ course.title }}!</h1>
+                        <p>
+                            {{ course.summary }}
+                        </p>
+                        <p>
+                            This course is for {{ course.level }} students
+                        </p>
+                        <p>
+                            There's only {{ course.places }} places
+                        </p>
+                        <p>
+                            The course has been created by {{ course.teacher_name }}
+                        </p>
                     {% else %}
-                        <p>The course if full.</p>
+                        <h1>No course found!</h1>
                     {% endif %}
-                {% endif %}
-            {% endif %}
-        {% endif %}
+                    {% if person %}
+                        {% if person.role == "Teacher" %}
+                            <a href="{% url 'delete_course' course.id %}">Delete</a>
+                            <a href="{% url 'update_course' course.id %}">Update</a>
+                        {% else %}
+                            {% if register %}
+                                <a href="{% url 'course_unregister' course.id %}">Unregister</a>
+                            {% else %}
+                                {% if full == False %}
+                                    <a href="{% url 'course_register' course.id %}">Register</a>
+                                {% else %}
+                                    <p>The course if full.</p>
+                                {% endif %}
+                            {% endif %}
+                        {% endif %}
+                    {% endif %}
+                </div>
+            </div>
+        </div>
     </body>
 </html>
\ No newline at end of file
diff --git a/redis_app/templates/home.html b/redis_app/templates/home.html
index f4c2d81..d72f444 100644
--- a/redis_app/templates/home.html
+++ b/redis_app/templates/home.html
@@ -1,4 +1,8 @@
 <html>
+    <head>
+        {% load static %}
+        <link rel="stylesheet" href="{% static 'redis_app/style.css' %}">
+    </head>
     <body>
         <nav>
             <a href="{% url 'home' %}">Home</a>
@@ -16,10 +20,22 @@
                 <a href="{% url 'logout' %}">Logout</a>
             {% endif %}
         </nav>
-        {% if person != '' %}
-            <h1>Welcome {{ person.name }}!</h1>
-        {% else %}
-            <h1>Welcome young padawan!</h1>
-        {% endif %}
+        <div class="body">
+            <div class="container">
+                <div class="div-container">
+                    {% if error_message %}
+                            <p class="error-message">{{ error_message }}</p>
+                        {% endif %}
+                        {% if success_message %}
+                            <p class="success-message">{{ success_message }}</p>
+                    {% endif %}
+                    {% if person != '' %}
+                        <h1>Welcome {{ person.name }}!</h1>
+                    {% else %}
+                        <h1>Welcome young padawan!</h1>
+                    {% endif %}
+                </div>
+            </div>
+        </div>
     </body>
 </html>
\ No newline at end of file
diff --git a/redis_app/templates/login.html b/redis_app/templates/login.html
index 0f5634a..3075b0e 100644
--- a/redis_app/templates/login.html
+++ b/redis_app/templates/login.html
@@ -1,4 +1,8 @@
 <html>
+    <head>
+        {% load static %}
+        <link rel="stylesheet" href="{% static 'redis_app/style.css' %}">
+    </head>
     <body>
         <nav>
             <a href="{% url 'home' %}">Home</a>
@@ -16,20 +20,31 @@
                 <a href="{% url 'logout' %}">Logout</a>
             {% endif %}
         </nav>
-        <form action="{% url 'login' %}" method="POST">
-            {% csrf_token %}
-            <fieldset>
-                <legend><h1>Login</h1></legend>
-                {% if error_message %}<p><strong>{{ error_message }}</strong></p>{% endif %}
-                <label for="name">Name</label><br>
-                <input name="name" id="name" value="{{ person.name }}"><br/>
-                <label for="role">Role</label><br>
-                <select name="role" id="role">
-                    <option value="Student" {% if person.role == 'Student' %}selected{% endif %}>Student</option>
-                    <option value="Teacher" {% if person.role == 'Teacher' %}selected{% endif %}>Teacher</option>
-                </select>
-            </fieldset>
-            <input type="submit" value="Login">
-        </form>
+        <div class="body">
+            <div class="container">
+                <form action="{% url 'login' %}" method="POST">
+                    {% csrf_token %}
+                    <fieldset>
+                        <legend><h1>Login</h1></legend>
+                        {% if error_message %}
+                            <p class="error-message">{{ error_message }}</p>
+                        {% endif %}
+                        {% if success_message %}
+                            <p class="success-message">{{ success_message }}</p>
+                        {% endif %}
+                        <label for="name">Name</label>
+                        <input name="name" id="name" value="{{ person.name }}" class="input">
+                        <label for="role">Role</label>
+                        <select name="role" id="role">
+                            <option value="Student" {% if person.role == 'Student' %}selected{% endif %}>Student</option>
+                            <option value="Teacher" {% if person.role == 'Teacher' %}selected{% endif %}>Teacher</option>
+                        </select>
+                    </fieldset>
+                    <div class="submit-container">
+                        <input type="submit" value="Login" class="submit">
+                    </div>
+                </form>
+            </div>
+        </div>
     </body>
 </html>
\ No newline at end of file
diff --git a/redis_app/templates/notifications.html b/redis_app/templates/notifications.html
index 85c786c..a9557b1 100644
--- a/redis_app/templates/notifications.html
+++ b/redis_app/templates/notifications.html
@@ -1,4 +1,8 @@
 <html>
+    <head>
+        {% load static %}
+        <link rel="stylesheet" href="{% static 'redis_app/style.css' %}">
+    </head>
     <body>
         <nav>
             <a href="{% url 'home' %}">Home</a>
@@ -16,11 +20,18 @@
                 <a href="{% url 'logout' %}">Logout</a>
             {% endif %}
         </nav>
-        <h1>Notifications</h1>
-        {% for message in messages %}
-            <a href="{% url 'details' message.channel %}">{{ message.data }}</a><br/>
-        {% endfor %}
-        <a href="{% url 'clear_notifications' %}">Clear notifications</a>
+        <div class="body">
+            <div class="container">
+                <div class="notifications">
+                    <h1>Notifications</h1>
+
+                    <a href="{% url 'clear_notifications' %}">Clear notifications</a>
+                </div>
+                {% for message in messages %}
+                    <a href="{% url 'details' message.channel %}">{{ message.data }}</a>
+                {% endfor %}
+            </div>
+        </div>
         <script>
             setInterval(function() {
                 window.location.reload();
diff --git a/redis_app/templates/profile.html b/redis_app/templates/profile.html
index 64f890c..3532766 100644
--- a/redis_app/templates/profile.html
+++ b/redis_app/templates/profile.html
@@ -1,4 +1,8 @@
 <html>
+    <head>
+        {% load static %}
+        <link rel="stylesheet" href="{% static 'redis_app/style.css' %}">
+    </head>
     <body>
         <nav>
             <a href="{% url 'home' %}">Home</a>
@@ -16,20 +20,31 @@
                 <a href="{% url 'logout' %}">Logout</a>
             {% endif %}
         </nav>
-        <form action="{% url 'change_profile' %}" method="POST">
-            {% csrf_token %}
-            <fieldset>
-                <legend><h1>Profile</h1></legend>
-                {% if error_message %}<p><strong>{{ error_message }}</strong></p>{% endif %}
-                <label for="name">Name</label><br>
-                <input name="name" id="name" value="{{ person.name }}"><br/>
-                <label for="role">Role</label><br>
-                <select name="role" id="role">
-                    <option value="Student" {% if person.role == 'Student' %}selected{% endif %}>Student</option>
-                    <option value="Teacher" {% if person.role == 'Teacher' %}selected{% endif %}>Teacher</option>
-                </select>
-            </fieldset>
-            <input type="submit" value="Update">
-        </form>
+        <div class="body">
+            <div class="container">
+                <form action="{% url 'change_profile' %}" method="POST">
+                    {% csrf_token %}
+                    <fieldset>
+                        <legend><h1>Profile</h1></legend>
+                        {% if error_message %}
+                            <p class="error-message">{{ error_message }}</p>
+                        {% endif %}
+                        {% if success_message %}
+                            <p class="success-message">{{ success_message }}</p>
+                        {% endif %}
+                        <label for="name">Name</label>
+                        <input name="name" id="name" value="{{ person.name }}" class="input">
+                        <label for="role">Role</label>
+                        <select name="role" id="role">
+                            <option value="Student" {% if person.role == 'Student' %}selected{% endif %}>Student</option>
+                            <option value="Teacher" {% if person.role == 'Teacher' %}selected{% endif %}>Teacher</option>
+                        </select>
+                    </fieldset>
+                    <div class="submit-container">
+                        <input type="submit" value="Update profile" class="submit">
+                    </div>
+                </form>
+            </div>
+        </div>
     </body>
 </html>
\ No newline at end of file
diff --git a/redis_app/templates/publish_message.html b/redis_app/templates/publish_message.html
index 564d427..7e598d4 100644
--- a/redis_app/templates/publish_message.html
+++ b/redis_app/templates/publish_message.html
@@ -1,4 +1,8 @@
 <html>
+    <head>
+        {% load static %}
+        <link rel="stylesheet" href="{% static 'redis_app/style.css' %}">
+    </head>
     <body>
         <nav>
             <a href="{% url 'home' %}">Home</a>
@@ -16,27 +20,36 @@
                 <a href="{% url 'logout' %}">Logout</a>
             {% endif %}
         </nav>
-        <form action="{% url 'publish_message_form' %}" method="POST">
-            {% csrf_token %}
-            <fieldset>
-                <legend><h1>Publish a message</h1></legend>
-                
-                {% if error_message %}
-                    {{ error_message }}
-                {% endif %}
-                
-                <label for="course_id">Course</label><br>
-                <select name="course_id" id="course_id" required>
-                    {% for course in courses %}
-                        <option value="{{ course.id }}">{{ course.title }}</option>
-                    {% endfor %}
-                </select><br/>
+        <div class="body">
+            <div class="container">
+                <form action="{% url 'publish_message_form' %}" method="POST">
+                    {% csrf_token %}
+                    <fieldset>
+                        <legend><h1>Publish a message</h1></legend>
+                        
+                        {% if error_message %}
+                            <p class="error-message">{{ error_message }}</p>
+                        {% endif %}
+                        {% if success_message %}
+                            <p class="success-message">{{ success_message }}</p>
+                        {% endif %}
+
+                        <label for="course_id">Course</label>
+                        <select name="course_id" id="course_id" required>
+                            {% for course in courses %}
+                                <option value="{{ course.id }}">{{ course.title }}</option>
+                            {% endfor %}
+                        </select>
 
-                <label for="message">Message</label><br>
-                <input name="message" id="message" required><br/>
-            </fieldset>
-            
-            <input type="submit" value="Publish the message">
-        </form>
+                        <label for="message">Message</label>
+                        <input name="message" id="message" class="input" required>
+                    </fieldset>
+                    
+                    <div class="submit-container">
+                        <input type="submit" value="Publish" class="submit">
+                    </div>
+                </form>
+            </div>
+        </div>
     </body>
 </html>
diff --git a/redis_app/templates/register.html b/redis_app/templates/register.html
index 1372a2c..e66c5b5 100644
--- a/redis_app/templates/register.html
+++ b/redis_app/templates/register.html
@@ -1,4 +1,8 @@
 <html>
+    <head>
+        {% load static %}
+        <link rel="stylesheet" href="{% static 'redis_app/style.css' %}">
+    </head>
     <body>
         <nav>
             <a href="{% url 'home' %}">Home</a>
@@ -16,20 +20,31 @@
                 <a href="{% url 'logout' %}">Logout</a>
             {% endif %}
         </nav>
-        <form action="{% url 'register' %}" method="POST">
-            {% csrf_token %}
-            <fieldset>
-                <legend><h1>Register</h1></legend>
-                {% if error_message %}<p><strong>{{ error_message }}</strong></p>{% endif %}
-                <label for="name">Name</label><br>
-                <input name="name" id="name" value="{{ person.name }}"><br/>
-                <label for="role">Role</label><br>
-                <select name="role" id="role">
-                    <option value="Student" {% if person.role == 'Student' %}selected{% endif %}>Student</option>
-                    <option value="Teacher" {% if person.role == 'Teacher' %}selected{% endif %}>Teacher</option>
-                </select>
-            </fieldset>
-            <input type="submit" value="Register">
-        </form>
+        <div class="body">
+            <div class="container">
+                <form action="{% url 'register' %}" method="POST">
+                    {% csrf_token %}
+                    <fieldset>
+                        <legend><h1>Register</h1></legend>
+                        {% if error_message %}
+                            <p class="error-message">{{ error_message }}</p>
+                        {% endif %}
+                        {% if success_message %}
+                            <p class="success-message">{{ success_message }}</p>
+                        {% endif %}
+                        <label for="name">Name</label>
+                        <input name="name" id="name" value="{{ person.name }}" class="input">
+                        <label for="role">Role</label>
+                        <select name="role" id="role">
+                            <option value="Student" {% if person.role == 'Student' %}selected{% endif %}>Student</option>
+                            <option value="Teacher" {% if person.role == 'Teacher' %}selected{% endif %}>Teacher</option>
+                        </select>
+                    </fieldset>
+                    <div class="submit-container">
+                        <input type="submit" value="Register" class="submit">
+                    </div>
+                </form>
+            </div>
+        </div>
     </body>
 </html>
\ No newline at end of file
diff --git a/redis_app/templates/search.html b/redis_app/templates/search.html
index e962813..f9abf26 100644
--- a/redis_app/templates/search.html
+++ b/redis_app/templates/search.html
@@ -1,4 +1,8 @@
 <html>
+    <head>
+        {% load static %}
+        <link rel="stylesheet" href="{% static 'redis_app/style.css' %}">
+    </head>
     <body>
         <nav>
             <a href="{% url 'home' %}">Home</a>
@@ -16,22 +20,33 @@
                 <a href="{% url 'logout' %}">Logout</a>
             {% endif %}
         </nav>
-        <form action="{% url 'search_form' %}" method="POST">
-            {% csrf_token %}
-            <fieldset>
-                <legend><h1>Search</h1></legend>
-                {% if error_message %}<p><strong>{{ error_message }}</strong></p>{% endif %}
-                <label for="keywords">Keywords</label><br>
-                <input name="keywords" id="keywords" placeholder="Keywords separated by spaces"><br/>
-            </fieldset>
-            <input type="submit" value="Search">
-        </form>
-        {% if courses %}
-            {% for course in courses %}
-                <a href="{% url 'details' course.id %}">{{ course.title }}</a>
-            {% endfor %}
-        {% else %}
-            <p>No course found</p>
-        {% endif %}
+        <div class="body">
+            <div class="container">
+                <form action="{% url 'search_form' %}" method="POST">
+                    {% csrf_token %}
+                    <fieldset>
+                        <legend><h1>Search</h1></legend>
+                        {% if error_message %}
+                            <p class="error-message">{{ error_message }}</p>
+                        {% endif %}
+                        {% if success_message %}
+                            <p class="success-message">{{ success_message }}</p>
+                        {% endif %}
+                        <label for="keywords">Keywords</label>
+                        <input name="keywords" id="keywords" placeholder="Keywords separated by spaces" class="input">
+                    </fieldset>
+                    <div class="submit-container">
+                        <input type="submit" value="Search" class="submit">
+                    </div>
+                </form>
+                {% if courses %}
+                    {% for course in courses %}
+                        <a href="{% url 'details' course.id %}">{{ course.title }}</a>
+                    {% endfor %}
+                {% else %}
+                    <p>No course found</p>
+                {% endif %}
+            </div>
+        </div>
     </body>
 </html>
\ No newline at end of file
diff --git a/redis_app/templates/update.html b/redis_app/templates/update.html
index 1343fde..80ee575 100644
--- a/redis_app/templates/update.html
+++ b/redis_app/templates/update.html
@@ -1,4 +1,8 @@
 <html>
+    <head>
+        {% load static %}
+        <link rel="stylesheet" href="{% static 'redis_app/style.css' %}">
+    </head>
     <body>
         <nav>
             <a href="{% url 'home' %}">Home</a>
@@ -13,43 +17,52 @@
                 <a href="{% url 'logout' %}">Logout</a>
             {% endif %}
         </nav>
-        <form action="{% url 'update_course_form' course.id %}" method="POST">
-            {% csrf_token %}
-            <fieldset>
-                <legend><h1>Update a course</h1></legend>
-                
-                {% if error_message %}
-                    {{ error_message }}
-                {% endif %}
-                <br/>
-                <label for="title">Course Title</label><br>
-                <input type="text" name="title" id="title" value="{{ course.title }}" required><br/>
+        <div class="body">
+            <div class="container">
+                <form action="{% url 'update_course_form' course.id %}" method="POST">
+                    {% csrf_token %}
+                    <fieldset>
+                        <legend><h1>Update a course</h1></legend>
+                        
+                        {% if error_message %}
+                            <p class="error-message">{{ error_message }}</p>
+                        {% endif %}
+                        {% if success_message %}
+                            <p class="success-message">{{ success_message }}</p>
+                        {% endif %}
+                        
+                        <label for="title">Course Title</label>
+                        <input type="text" name="title" id="title" value="{{ course.title }}" class="input" required>
 
-                <label for="summary">Course Summary</label><br>
-                <textarea name="summary" id="summary" required>{{ course.summary }}</textarea><br/>
+                        <label for="summary">Course Summary</label>
+                        <textarea name="summary" id="summary" required>{{ course.summary }}</textarea>
 
-                <label for="level">Course Level</label><br>
-                <select name="level" id="level" required>
-                    {% if course.level == 'Beginner' %}
-                        <option value="Beginner" selected>Beginner</option>
-                        <option value="Intermediate">Intermediate</option>
-                        <option value="Advanced">Advanced</option>
-                    {% elif course.level == 'Intermediate' %}
-                        <option value="Beginner">Beginner</option>
-                        <option value="Intermediate" selected>Intermediate</option>
-                        <option value="Advanced">Advanced</option>
-                    {% else %}
-                        <option value="Beginner">Beginner</option>
-                        <option value="Intermediate">Intermediate</option>
-                        <option value="Advanced" selected>Advanced</option>
-                    {% endif %}
-                </select><br/>
+                        <label for="level">Course Level</label>
+                        <select name="level" id="level" required>
+                            {% if course.level == 'Beginner' %}
+                                <option value="Beginner" selected>Beginner</option>
+                                <option value="Intermediate">Intermediate</option>
+                                <option value="Advanced">Advanced</option>
+                            {% elif course.level == 'Intermediate' %}
+                                <option value="Beginner">Beginner</option>
+                                <option value="Intermediate" selected>Intermediate</option>
+                                <option value="Advanced">Advanced</option>
+                            {% else %}
+                                <option value="Beginner">Beginner</option>
+                                <option value="Intermediate">Intermediate</option>
+                                <option value="Advanced" selected>Advanced</option>
+                            {% endif %}
+                        </select>
 
-                <label for="places">Number of Places</label><br>
-                <input type="number" name="places" id="places" value="{{ course.places }}" min="1" required><br/>
-            </fieldset>
-            
-            <input type="submit" value="Update Course">
-        </form>
+                        <label for="places">Number of Places</label>
+                        <input type="number" name="places" id="places" value="{{ course.places }}" min="1" class="input" required>
+                    </fieldset>
+                    
+                    <div class="submit-container">
+                        <input type="submit" value="Update Course" class="submit">
+                    </div>
+                </form>
+            </div>
+        </div>
     </body>
 </html>
diff --git a/redis_app/utils/model.py b/redis_app/utils/model.py
new file mode 100644
index 0000000..3c2a568
--- /dev/null
+++ b/redis_app/utils/model.py
@@ -0,0 +1,230 @@
+import redis
+import uuid
+
+
+
+DEFAULT_EXPIRE_TIME = 300
+EXPIRE_REFRESH_TIME = 60
+
+redis_connection = redis.Redis(host='localhost', port=6379, decode_responses=True)
+
+####################################################################################
+#                                    - PERSONS -                                   #
+####################################################################################
+
+def getPersonId(person_name, person_role):
+    query = f"@name:{person_name} @role:{person_role}"
+    results = redis_connection.execute_command('FT.SEARCH', 'idx:persons', query)
+    if results[0] > 0:
+        person_key = results[1]
+        return person_key
+    return False
+
+def getPerson(person_id):
+    return redis_connection.hgetall(f"person:{person_id}")
+
+def register_redis(name, role):
+    query = f"@name:{name} @role:{role}"
+    results = redis_connection.execute_command('FT.SEARCH', 'idx:persons', query)
+    # First element = number of results
+    if results[0] > 0:
+        return False
+    person_key = f"person:{get_uuid4()}"
+    redis_connection.hset(person_key, mapping={
+        'name': name,
+        'role': role
+    })
+    
+    return redis_connection.hgetall(person_key)
+
+def login_redis(name, role):
+    query = f"@name:{name} @role:{role}"
+    results = redis_connection.execute_command('FT.SEARCH', 'idx:persons', query)
+    # First element = number of results
+    if results[0] > 0:
+        person_key = results[1]
+        return redis_connection.hgetall(person_key)
+    return False
+
+####################################################################################
+#                                    - COURSES -                                   #
+####################################################################################
+
+def isExpired(course_id):
+    ttl = redis_connection.ttl(f"course:{course_id}")
+    if ttl == -2 or ttl == 0: # If -1, the key has no expiration
+        return True
+    return False
+
+def isCourseFull(course):
+    students = course.get('students', '') # Because it crashes with ['students'], we have to put a default value: '' here
+    if not students:
+        return False
+    
+    try:
+        places = int(course['places'])
+        if len(students.split(',')) >= places:
+            return True
+        return False
+    except:
+        return False
+    
+def getCourseId2(course_title, course_teacher):
+    query = f"@title:{course_title} @teacher:{course_teacher}"
+    results = redis_connection.execute_command('FT.SEARCH', 'idx:courses', query)
+    if results[0] > 0:
+        course_key = results[1]
+        return course_key
+    return False
+
+def getCourseId(course):
+    return getCourseId2(course['title'], course['teacher'])
+
+def getCourse(course_id):
+    return redis_connection.hgetall(f"course:{course_id}")
+
+def delete_course(course_id):
+    course = redis_connection.hgetall(f"course:{course_id}")
+    if not course:
+        return False
+    redis_connection.delete(f"course:{course_id}")
+    return True
+
+def create_course(course_title, course_summary, course_level, course_places, course_teacher):
+    course_id = get_uuid4()
+    redis_connection.hset(f"course:{course_id}", mapping={
+                          "title": course_title,
+                          "summary": course_summary,
+                          "level": course_level,
+                          "places": course_places,
+                          "teacher": course_teacher
+                          })
+    redis_connection.expire(f"course:{course_id}", DEFAULT_EXPIRE_TIME)
+
+def update_course(course_id, course_title, course_summary, course_level, course_places, course_teacher):
+    redis_connection.hset(f"course:{course_id}", mapping={
+                          "title": course_title,
+                          "summary": course_summary,
+                          "level": course_level,
+                          "places": course_places,
+                          "teacher": course_teacher
+                          })
+    redis_connection.expire(f"course:{course_id}", DEFAULT_EXPIRE_TIME)
+    publish(course_id, f"UPDATE: Course:{course_id} is now: Title: {course_title}, Summary: {course_summary}, Level: {course_level}, Places: {course_places}, Teacher: {course_teacher}")
+
+def course_register(course_id, person_id):
+    course = redis_connection.hgetall(f"course:{course_id}")
+    person = redis_connection.hgetall(f"person:{person_id}")
+    if not course or not person:
+        return False
+
+    students = course.get('students', '')
+    if person_id in students.split(','):
+        return True
+
+    try:
+        places = int(course['places'])
+        if students != '':
+            students_nb = len(students.split(','))
+            if students_nb and students_nb >= places:
+                return False
+    except:
+        return False
+
+    if not students:
+        new_students = person_id
+    else:
+        new_students = students + "," + person_id
+
+    redis_connection.hset(f"course:{course_id}", "students", new_students)
+    return True
+
+def course_unregister(course_id, person_id):
+    course = redis_connection.hgetall(f"course:{course_id}")
+    person = redis_connection.hgetall(f"person:{person_id}")
+    if not course or not person:
+        return False
+
+    students = course.get('students', '')
+    if person_id not in students.split(','):
+        return True
+
+    students_list = students.split(",")
+    if len(students_list) == 1:
+        new_students = ""
+    else:
+        new_students = ",".join([student for student in students_list if student != person_id])
+
+    redis_connection.hset(f"course:{course_id}", "students", new_students)
+    return True
+
+def refresh_expire(course_id):
+    course = redis_connection.hgetall(f"course:{course_id}")
+    if not course:
+        return False
+    ttl = redis_connection.ttl(f"course:{course_id}")
+    if ttl <= 0:
+        return False
+    redis_connection.expire(f"course:{course_id}", ttl + EXPIRE_REFRESH_TIME)
+    return True
+
+####################################################################################
+#                                     - LINKS -                                    #
+####################################################################################
+
+def getCoursesFromPerson(person_id):
+    course_keys = redis_connection.keys(f"course:*")
+    courses = []
+    person = redis_connection.hgetall(f"person:{person_id}")
+    for key in course_keys:
+        course_data = redis_connection.hgetall(key)
+        if person['role'] == "Student":
+            if person_id in course_data.get('students', '').split(","):
+                course_id = getCourseId2(course_data['title'], course_data['teacher'])
+                if course_id == False:
+                    continue
+                course_data['id'] = course_id.split(":")[1]
+                courses.append(course_data)
+        else:
+            teacher_id = course_data["teacher"]
+            if teacher_id == person_id:
+                course_id = getCourseId2(course_data['title'], course_data['teacher'])
+                if course_id == False:
+                    continue
+                course_data['id'] = course_id.split(":")[1]
+                courses.append(course_data)
+    return courses
+
+def isPersonRegisteredToCourse(course, person):
+    if not person:
+        return False
+    
+    person_id = getPersonId(person["name"], person["role"]).split(":")[1]
+    if not person_id:
+        return False
+    
+    course_id = getCourseId(course)
+    if not course_id:
+        return False
+    
+    course_keys = redis_connection.keys(f"course:*")
+    for key in course_keys:
+        course_data = redis_connection.hgetall(key)
+        if person['role'] == "Student":
+            if person_id in course_data.get('students', '').split(","):
+                current_course_id = getCourseId2(course_data['title'], course_data['teacher'])
+                if current_course_id == False:
+                    continue
+                if course_id == current_course_id:
+                    return True
+    return False
+
+####################################################################################
+#                                     - UTILS -                                    #
+####################################################################################
+
+def get_uuid4():
+    return str(uuid.uuid4()).replace('-', '')
+
+def publish(course_id, message):
+    redis_connection.publish(course_id, message)
diff --git a/redis_app/views.py b/redis_app/views.py
index b505fd9..2056f03 100644
--- a/redis_app/views.py
+++ b/redis_app/views.py
@@ -1,167 +1,52 @@
 from django.shortcuts import render
 from django.http import Http404
 import redis
-import uuid
 from redis_app.utils.index import create_index
+from redis_app.utils.model import *
 # This model only helps us the development part to set rules on objects (we do not use the django model to save objects in it)
 from .models import Person
 
-DEFAULT_EXPIRE_TIME = 1200
-EXPIRE_REFRESH_TIME = 60
-
-messages = [] # All messages obtained with pub/sub. Will refresh the view every time a message is received
 redis_connection = redis.Redis(host='localhost', port=6379, decode_responses=True)
 pub_sub = redis_connection.pubsub()
 create_index(redis_connection=redis_connection)
 
-def get_uuid4():
-    return str(uuid.uuid4()).replace('-', '')
-
-def getCoursesFromPerson(person_id):
-    global redis_connection
-    course_keys = redis_connection.keys(f"course:*")
-    courses = []
-    person = redis_connection.hgetall(f"person:{person_id}")
-    for key in course_keys:
-        course_data = redis_connection.hgetall(key)
-        if person['role'] == "Student":
-            if person_id in course_data.get('students', '').split(","):
-                course_id = getCourseId2(course_data['title'], course_data['teacher'])
-                if course_id == False:
-                    continue
-                course_data['id'] = course_id.split(":")[1]
-                courses.append(course_data)
-        else:
-            teacher_id = course_data["teacher"]
-            if teacher_id == person_id:
-                course_id = getCourseId2(course_data['title'], course_data['teacher'])
-                if course_id == False:
-                    continue
-                course_data['id'] = course_id.split(":")[1]
-                courses.append(course_data)
-    return courses
-
-def isExpired(course_id):
-    global redis_connection
-    ttl = redis_connection.ttl(f"course:{course_id}")
-    if ttl == -2 or ttl == 0: # If -1, the key has no expiration
-        return True
-    return False
-
-def isCourseFull(course):
-    students = course.get('students', '') # Because it crashes with ['students'], we have to put a default value: '' here
-    if not students:
-        return False
-    
-    try:
-        places = int(course['places'])
-        if len(students.split(',')) >= places:
-            return True
-        return False
-    except:
-        return False
-
-def getPersonId(person_name, person_role):
-    query = f"@name:{person_name} @role:{person_role}"
-    results = redis_connection.execute_command('FT.SEARCH', 'idx:persons', query)
-    if results[0] > 0:
-        person_key = results[1]
-        return person_key
-    return False
-
-def getCourseId2(course_title, course_teacher):
-    query = f"@title:{course_title} @teacher:{course_teacher}"
-    results = redis_connection.execute_command('FT.SEARCH', 'idx:courses', query)
-    if results[0] > 0:
-        course_key = results[1]
-        return course_key
-    return False
-
-def getCourseId(course):
-    return getCourseId2(course['title'], course['teacher'])
-
-
-
 def home(request):
     person = request.session.get("person", "")
     return render(request, 'home.html', {'person': person})
 
-def isPersonRegisteredToCourse(course, person):
-    global redis_connection
-    if not person:
-        return False
-    
-    person_id = getPersonId(person["name"], person["role"]).split(":")[1]
-    if not person_id:
-        return False
-    
-    course_id = getCourseId(course)
-    if not course_id:
-        return False
-    
-    course_keys = redis_connection.keys(f"course:*")
-    for key in course_keys:
-        course_data = redis_connection.hgetall(key)
-        if person['role'] == "Student":
-            if person_id in course_data.get('students', '').split(","):
-                current_course_id = getCourseId2(course_data['title'], course_data['teacher'])
-                if current_course_id == False:
-                    continue
-                if course_id == current_course_id:
-                    return True
-    return False
-
-def details(request, course_id, error_message=''):
+def details(request, course_id, error_message='', success_message=''):
     person = request.session.get("person", "")
-    global redis_connection
     if isExpired(course_id):
         raise Http404("Course has expired... Get faster next time!")
-    course = redis_connection.hgetall(f"course:{course_id}")
+    course = getCourse(course_id)
     if not course:
         raise Http404("Course does not exist")
     course['id'] = course_id
-    teacher = redis_connection.hgetall(f"person:{course['teacher']}")
+    teacher = getPerson(course['teacher'])
     if not teacher:
         raise Http404("Teacher does not exist")
     course['teacher_name'] = teacher['name']
     register = isPersonRegisteredToCourse(course, person)
     full = isCourseFull(course)
-    return render(request, 'details.html', {'course': course, 'person': person, 'register': register, 'full': full, 'error_message': error_message})
+    return render(request, 'details.html', {'course': course, 'person': person, 'register': register, 'full': full, 'error_message': error_message, 'success_message': success_message})
 
 def register(request):
     if request.method == 'POST':
-        person_name = request.POST['name']
-        person_role = request.POST['role']
-        query = f"@name:{person_name} @role:{person_role}"
-        results = redis_connection.execute_command('FT.SEARCH', 'idx:persons', query)
-        # First element = number of results
-        if results[0] > 0:
+        person = register_redis(request.POST['name'], request.POST['role'])
+        if not person:
             return render(request, 'register.html', {'person': Person(name="", role=""), "error_message": "This user already exists!"})
-        person_key = f"person:{get_uuid4()}"
-        redis_connection.hset(person_key, mapping={
-            'name': person_name,
-            'role': person_role
-        })
-        
-        
-        request.session["person"] = redis_connection.hgetall(person_key)
+        request.session["person"] = person
         return home(request)
         
     return render(request, 'register.html', {'person': Person(name="", role=""), "error_message": "The form has been wrongly filled!"})
 
 def login(request):
     if request.method == 'POST':
-        person_name = request.POST['name']
-        person_role = request.POST['role']
-        
-        query = f"@name:{person_name} @role:{person_role}"
-        results = redis_connection.execute_command('FT.SEARCH', 'idx:persons', query)
-        if results[0] > 0:
-            person_key = results[1]
-            request.session["person"] = redis_connection.hgetall(person_key)
-            return home(request)
-        return render(request, 'login.html', {'person': Person(name="", role=""), "error_message": "No user found!"})
-
+        person = login_redis(request.POST["name"], request.POST["role"])
+        if not person:
+            return render(request, 'login.html', {'person': Person(name="", role=""), "error_message": "No user found!"})
+        request.session["person"] = person
+        return home(request)
     return login_form(request)
 
 def register_form(request):
@@ -174,14 +59,14 @@ def logout(request):
     request.session["person"] = ""
     return render(request, 'login.html', {'person': Person(name="", role="")})
 
-def courses(request):
+def courses(request, error_message="", success_message=""):
     person = request.session.get("person", "")
     if person == "":
         return render(request, 'login.html', {'person': Person(name="", role=""), "error_message": "You must login!"})
     person_id = getPersonId(person["name"], person["role"]).split(":")[1]
 
     courses = getCoursesFromPerson(person_id)
-    return render(request, 'courses.html', {'person': person, 'courses': courses})
+    return render(request, 'courses.html', {'person': person, 'courses': courses, 'error_message': error_message, 'success_message': success_message})
 
 def change_profile(request):
     person = request.session.get("person", "")
@@ -200,7 +85,7 @@ def change_profile(request):
         person["name"] = person_name
         person["role"] = person_role
         request.session["person"] = person
-        return render(request, 'profile.html', {'person': person})
+        return render(request, 'profile.html', {'person': person, 'success_message': 'Your profile has been successfully changed!'})
     
     return login_form(request)
 
@@ -210,18 +95,6 @@ def profile(request):
         return render(request, 'login.html', {'person': Person(name="", role=""), "error_message": "You must login!"})
     return render(request, 'profile.html', {'person': person})
 
-
-
-
-
-
-def delete_course(course_id):
-    course = redis_connection.hgetall(f"course:{course_id}")
-    if not course:
-        return False
-    redis_connection.delete(f"course:{course_id}")
-    return True
-
 def delete_course_view(request, course_id):
     if isExpired(course_id):
         raise Http404("Course has expired... Get faster next time!")
@@ -231,40 +104,17 @@ def delete_course_view(request, course_id):
     publish(course_id, f"DELETE: Course:{course_id} has been deleted!")
     return courses(request)
 
-def create_course(course_title, course_summary, course_level, course_places, course_teacher):
-    course_id = get_uuid4()
-    redis_connection.hset(f"course:{course_id}", mapping={
-                          "title": course_title,
-                          "summary": course_summary,
-                          "level": course_level,
-                          "places": course_places,
-                          "teacher": course_teacher
-                          })
-    redis_connection.expire(f"course:{course_id}", DEFAULT_EXPIRE_TIME)
-
-def update_course(course_id, course_title, course_summary, course_level, course_places, course_teacher):
-    redis_connection.hset(f"course:{course_id}", mapping={
-                          "title": course_title,
-                          "summary": course_summary,
-                          "level": course_level,
-                          "places": course_places,
-                          "teacher": course_teacher
-                          })
-    redis_connection.expire(f"course:{course_id}", DEFAULT_EXPIRE_TIME)
-    publish(course_id, f"UPDATE: Course:{course_id} is now: Title: {course_title}, Summary: {course_summary}, Level: {course_level}, Places: {course_places}, Teacher: {course_teacher}")
-
 def publish_message(request):
     person = request.session.get("person", "")
     courses_fetched = getCoursesFromPerson(getPersonId(person['name'], person['role']).split(":")[1])
     for course in courses_fetched:
         course['id'] = getCourseId(course).split(':')[1]
     if not courses_fetched:
-        return courses(request)
-    return render(request, 'publish_message.html', {'person': person, 'courses': courses_fetched})
+        return courses(request, 'You don\'t have any course. You must create one to publish a message!')
+    return render(request, 'publish_message.html', {'person': person, 'courses': courses_fetched, 'success_message': 'The message has been successfully sent!'})
 
 def publish_message_form(request):
     person = request.session.get("person", "")
-    global redis_connection
     if person == '':
         return render(request, 'login.html', {'person': Person(name="", role=""), "error_message": "You must login!"})
     if person['role'] == 'Student':
@@ -299,7 +149,6 @@ def update_course_view(request, course_id):
 
 def create_course_form(request):
     person = request.session.get("person", "")
-    global redis_connection
     if person == '':
         return render(request, 'login.html', {'person': Person(name="", role=""), "error_message": "You must login!"})
     if request.method == 'POST':
@@ -309,13 +158,12 @@ def create_course_form(request):
         course_places = request.POST['places']
         course_teacher = getPersonId(person['name'], person['role']).split(":")[1]
         create_course(course_title, course_summary, course_level, course_places, course_teacher)
-        return courses(request)
+        return courses(request, "", "The course has been successfully created!")
         
     return render(request, 'create.html', {'person': person, "error_message": "The form has been wrongly filled!"})
 
 def update_course_form(request, course_id):
     person = request.session.get("person", "")
-    global redis_connection
     if isExpired(course_id):
         raise Http404("Course has expired... Get faster next time!")
     if person == '':
@@ -335,60 +183,12 @@ def update_course_form(request, course_id):
         except:
             return render(request, 'update.html', {'person': person, "error_message": "The number of places has not the right format!", "course": course})
         update_course(course_id, course_title, course_summary, course_level, course_places, course_teacher)
-        return courses(request)
+        return courses(request, "", "The course has been successfully changed!")
         
     return render(request, 'update.html', {'person': person, "error_message": "The form has been wrongly filled!", "course": course})
 
-# Test if places are not limited
-def course_register(course_id, person_id):
-    course = redis_connection.hgetall(f"course:{course_id}")
-    person = redis_connection.hgetall(f"person:{person_id}")
-    if not course or not person:
-        return False
-
-    students = course.get('students', '')
-    if person_id in students.split(','):
-        return True
-
-    try:
-        places = int(course['places'])
-        if students != '':
-            students_nb = len(students.split(','))
-            if students_nb and students_nb >= places:
-                return False
-    except:
-        return False
-
-    if not students:
-        new_students = person_id
-    else:
-        new_students = students + "," + person_id
-
-    redis_connection.hset(f"course:{course_id}", "students", new_students)
-    return True
-
-def course_unregister(course_id, person_id):
-    course = redis_connection.hgetall(f"course:{course_id}")
-    person = redis_connection.hgetall(f"person:{person_id}")
-    if not course or not person:
-        return False
-
-    students = course.get('students', '')
-    if person_id not in students.split(','):
-        return True
-
-    students_list = students.split(",")
-    if len(students_list) == 1:
-        new_students = ""
-    else:
-        new_students = ",".join([student for student in students_list if student != person_id])
-
-    redis_connection.hset(f"course:{course_id}", "students", new_students)
-    return True
-
 def course_register_view(request, course_id):
     person = request.session.get("person", "")
-    global redis_connection
     if isExpired(course_id):
         raise Http404("Course has expired... Get faster next time!")
     person_id = getPersonId(person["name"], person["role"]).split(":")[1]
@@ -403,13 +203,12 @@ def course_register_view(request, course_id):
         raise Http404("Teacher does not exist")
     course['teacher_name'] = teacher['name']
     if course_register(course_id, person_id):
-        return details(request, course_id)
+        return details(request, course_id, '', 'Successfully registered to the course.')
     return details(request, course_id, "Could not register to the course. Try again later.")
 
 def course_unregister_view(request, course_id):
     person = request.session.get("person", "")
-    global redis_connection
-    if personLoggedIn == "":
+    if person == "":
         return render(request, 'login.html', {'person': Person(name="", role=""), "error_message": "You must login!"})
     if isExpired(course_id):
         raise Http404("Course has expired... Get faster next time!")
@@ -425,35 +224,9 @@ def course_unregister_view(request, course_id):
         raise Http404("Teacher does not exist")
     course['teacher_name'] = teacher['name']
     if course_unregister(course_id, person_id):
-        return details(request, course_id)
+        return details(request, course_id, '', "Successfully unregistered to the course.")
     return details(request, course_id, "Could not unregister to the course. Try again later.")
 
-def refresh_expire(course_id):
-    course = redis_connection.hgetall(f"course:{course_id}")
-    if not course:
-        return False
-    ttl = redis_connection.ttl(f"course:{course_id}")
-    if ttl <= 0:
-        return False
-    redis_connection.expire(f"course:{course_id}", ttl + EXPIRE_REFRESH_TIME)
-    return True
-
-def publish(course_id, message):
-    global redis_connection
-    redis_connection.publish(course_id, message)
-
-# Courses is a list of course id to subscribe to
-def subscribe(courses_id):
-    pub_sub.psubscribe(*courses_id)
-
-    for message in pub_sub.listen():
-        if message["type"] != 'pmessage':
-            continue
-        send_new_course_notification(message)
-
-def send_new_course_notification(message):
-    print(message)
-
 def search(keywords):
     courses = []
     for keyword in keywords.split(' '):
@@ -483,7 +256,6 @@ def search_view(request):
 
 def search_form(request):
     person = request.session.get("person", "")
-    global redis_connection
     if request.method == 'POST':
         keywords = request.POST['keywords']
         courses = []
@@ -500,29 +272,31 @@ def search_form(request):
     
 def notifications_view(request):
     person = request.session.get("person", "")
-    global messages
+    messages = request.session.get("messages", [])
     return render(request, 'notifications.html', {'person': person, 'messages': messages})
 
 def notifications(request):
     person = request.session.get("person", "")
-    global messages
+    messages = request.session.get("messages", [])
     if person == "":
         return render(request, 'login.html', {'person': Person(name="", role=""), "error_message": "You must login!"})
     pub_sub.punsubscribe()
     courses_id = [course['id'] for course in getCoursesFromPerson(getPersonId(person['name'], person['role']).split(":")[1])]
     if not courses_id:
-        return courses(request)
+        return courses(request, "You're not registered to any course. Please register to one to follow notifications.")
     pub_sub.psubscribe(*courses_id)
 
     for message in pub_sub.listen():
         if message["type"] != 'pmessage':
             continue
         messages.append(message)
-        return notifications_view(request)
+        messages.reverse()
+        request.session["message"] = messages
+        break
+    return notifications_view(request)
     
 def clear_notifications(request):
-    global messages
-    messages = []
+    request.session["messages"] = []
     return notifications_view(request)
 
 # Every id is only the number, not the course:number or person:number
\ No newline at end of file