Prevent user from adding duplicate tag

app.py

@@ -1,5 +1,6 @@
 from flask import Flask
 from flask_restful import Api
+
 from flask_pagedown import PageDown
 import os
 

core/views.py

@@ -218,8 +218,17 @@ def add_tag():
     form = AddTagForm()
     if form.validate_on_submit():
         tag = request.form['tag']
-        functions.add_tag(tag, session['id'])
-        return redirect('/profile/')
+        tags = functions.get_all_tags(session['id'])
+        res = list(zip(*tags)) 
+        res = set(res[1])
+        if tag in res:
+
+            flash("Tag Already Exists",'alert alert-danger')
+            return render_template('add_tag.html', form=form, username=session['username'])
+
+        else:
+            functions.add_tag(tag, session['id'])
+            return redirect('/profile/')
     return render_template('add_tag.html', form=form, username=session['username'])
 
 
@@ -324,7 +333,8 @@ def background_process():
     try:
         notes = request.args.get('notes')
         if notes == '':
-            return jsonify(result='')
+            temp = "No Data Exists"
+            return jsonify(result=Markup(temp))
         results = functions.get_search_data(str(notes), session['id'])
         temp = ''
         for result in results:

manage.py

@@ -3,4 +3,4 @@
 app = create_app()
 
 if __name__ == "__main__":
-    app.run(port="5000", debug=True, host="0.0.0.0")
+    app.run(port= "5000", debug=True, host="0.0.0.0")

templates/add_tag.html

@@ -3,6 +3,15 @@
 {% block content %}
     <div class="container">
         <div class="col-lg-12 col-md-12 col-sm-12 col-xs-12">
+            {% with messages = get_flashed_messages(with_categories=true) %}
+            {% if messages %}
+
+              {% for category, message in messages %}
+                <div class="{{ category }}">{{ message }}</div>
+              {% endfor %}
+
+            {% endif %}
+          {% endwith %}
             {% for message in form.tag.errors %}
                 <div class="alert alert-danger">{{ message }}</div>
             {% endfor %}

templates/profile.html

@@ -32,7 +32,7 @@
                                 <tr>
                                     <td class="text-center">{{ loop.index }}</td>
                                     <td> <a href="/notes/{{ note[0] }}/">{{ note[3] }}</a></td>
-                                    <td>{{ note[1] | custom_date }}</td>
+                                    <td>{{ note[1]  }}</td>
                                     <td>
                                             {{ tags[loop.index0] }}
                                     </td>

templates/profile_settings.html

@@ -6,9 +6,9 @@
             <div class="thumbnail" style="padding: 3%">
                 {% for user in user_data %}
                     <legend><h3 class="text-center"><b>User Details:</b></h3></legend>
-                    <h4><b>Registered on:</b> <br><br> {{ user[1] | custom_date }}</h4>
+                    <h4><b>Registered on:</b> <br><br> {{ user[1]  }}</h4>
                     <br>
-                    <h4><b>Last Logged in on:</b> <br><br> {{ user[2] | custom_date }}</h4>
+                    <h4><b>Last Logged in on:</b> <br><br> {{ user[2] }}</h4>
                     <br>
                     <h4><b>Email: <a href="/profile/settings/change_email/"><span class="glyphicon glyphicon-pencil"></span></a></b> <br><br> {{ user[5] }}</h4>
                     <br>

templates/view_tag.html

@@ -3,6 +3,7 @@
 {% block content %}
     <div class="container"  style="padding-top: 2%">
         <div class="col-lg-12 col-md-12 col-sm-12 col-xs-12">
+
             <h2> Notes tagged under: {{ tag_name }}</h2>
             <br>
             {% if username %}

utils/forms.py

@@ -1,5 +1,5 @@
 from flask_wtf import FlaskForm
-from wtforms import TextField, PasswordField, SubmitField, SelectMultipleField, HiddenField
+from wtforms import TextField, PasswordField, SubmitField, SelectMultipleField, HiddenField,BooleanField
 from flask_pagedown.fields import PageDownField
 from wtforms import validators