Add ability to add/delete exercises from dropdown

features/exercises.py

@@ -18,3 +18,14 @@ class Exercises:
         self.execute(sql, params)
         updated_exercise = self.get_exercise(exercise_id)
         return updated_exercise
+    
+    def delete_exercise(self, exercise_id):
+        self.execute('DELETE FROM exercise WHERE exercise_id=%s', [
+            exercise_id], commit=True)
+    
+    def add_exercise(self, name):
+        result = self.execute('INSERT INTO exercise (name) VALUES (%s) RETURNING exercise_id', [name], commit=True, one=True)
+        exercise_id = result['exercise_id']
+        new_exercise = self.get_exercise(exercise_id)
+        return new_exercise
+