Show "Forgot Password" link.

Provide the user with the "Forgot Password" link, if the backend
supports it.

2 files changed, 20 insertions, 3 deletions

diff --git a/gn_auth/auth/authentication/oauth2/views.py b/gn_auth/auth/authentication/oauth2/views.py
index ca1cf5a..d0b55b4 100644
--- a/gn_auth/auth/authentication/oauth2/views.py
+++ b/gn_auth/auth/authentication/oauth2/views.py
@@ -47,6 +47,14 @@ def authorise():
             flash("Invalid OAuth2 client.", "alert-danger")
 
         if request.method == "GET":
+            def __forgot_password_table_exists__(conn):
+                with db.cursor(conn) as cursor:
+                    cursor.execute("SELECT name FROM sqlite_master "
+                                   "WHERE type='table' "
+                                   "AND name='forgot_password_tokens'")
+                    return bool(cursor.fetchone())
+                return False
+
             client = server.query_client(request.args.get("client_id"))
             _src = urlparse(request.args["redirect_uri"])
             return render_template(
@@ -55,7 +63,9 @@ def authorise():
                 scope=client.scope,
                 response_type=request.args["response_type"],
                 redirect_uri=request.args["redirect_uri"],
-                source_uri=f"{_src.scheme}://{_src.netloc}/")
+                source_uri=f"{_src.scheme}://{_src.netloc}/",
+                display_forgot_password=with_db_connection(
+                    __forgot_password_table_exists__))
 
         form = request.form
         def __authorise__(conn: db.DbConnection):
diff --git a/gn_auth/templates/oauth2/authorise-user.html b/gn_auth/templates/oauth2/authorise-user.html
index d69bdd4..07edb73 100644
--- a/gn_auth/templates/oauth2/authorise-user.html
+++ b/gn_auth/templates/oauth2/authorise-user.html
@@ -29,7 +29,14 @@
     <input type="password" name="user:password" id="user:password"
 	   required="required" class="form-control" />
   </div>
-  
-  <input type="submit" value="authorise" class="btn btn-primary" />
+
+  <div class="form-group">
+    <input type="submit" value="authorise" class="btn btn-primary" />
+    {%if display_forgot_password%}
+    <a href="{{url_for('oauth2.users.forgot_password')}}"
+       title="Click here to change your password."
+       class="form-text text-danger">Forgot Password</a>
+    {%endif%}
+  </div>
 </form>
 {%endblock%}