Add basic login/logout forms.

The new forms need better styling.
Remove index_cache.

undercover/routes.py

@@ -11,7 +11,6 @@ from wtforms import Form, StringField, TextAreaField, validators
 import undercover.db as db
 from undercover.pdf_builder import CLData
 
-index_cache = None
 writing_blueprint = Blueprint('writing', __name__,)
 
 
@@ -64,7 +63,7 @@ class CLForm(Form):
 
 
 @writing_blueprint.route('/login', methods=['POST', 'GET'])
-def login_post():
+def login():
     if request.method == 'POST':
         username = request.form['username']
         if db.login(username, request.form['password']):
@@ -81,16 +80,19 @@ def login_post():
     '''
 
 
+@writing_blueprint.route('/logout', methods=['POST'])
+def logout():
+    session.pop('username', None)
+    return redirect('/')
+
+
 @writing_blueprint.route('/', methods=['GET'])
 def index_get():
-    global index_cache
+    return render_template(
-    if not index_cache or 'username' in session:
+        'writing.jinja2',
-        index_cache = render_template(
+        form=CLForm(),
-            'writing.jinja2',
+        username=session['username']
-            form=CLForm(),
+    )
-            username=session['username']
-        )
-    return index_cache
 
 
 @writing_blueprint.route('/dbtest', methods=['GET'])

undercover/templates/writing.jinja2

@@ -42,7 +42,25 @@
   </a>
   <h2>The secret cover letter generator</h2>
   {% if username %}
-    <h3>You are logged in as {{ username }}</h3>
+    <div class="user logged-in">
+      <p>You are logged in as {{ username }}</p>
+      <form action="/logout">
+        <input type="submit" value="Logout">
+      </form>
+    </div>
+  {% else %}
+      <div class="user logged-out">
+        <p>You are here as a guest.</p>
+        <form action="/login">
+          <label for="username">Username: </label>
+          <input id="username" maxlength="32" minlength="4" name="username" type="text" placeholder="sagev9000">
+
+          <label for="password">Password: </label>
+          <input id="password" maxlength="32" minlength="4" name="password" type="password">
+
+          <input type="submit" value="Logout">
+        </form>
+      </div>
   {% endif %}
 
   {% from "_formhelpers.jinja2" import render_field %}