Add database connection to global context so repeat queries dont recreate connections(Need to check if this actually improves speed) also added in logic so if add workout is triggered when there is already a workout on that day without any topsets it will instead load that

db.py

@@ -3,6 +3,8 @@ import psycopg2
 from psycopg2.extras import RealDictCursor
 from datetime import datetime
 from urllib.parse import urlparse
+from flask import g
+
 
 from utils import get_all_exercises_from_topsets, get_stats_from_topsets, get_workouts
 
@@ -10,26 +12,41 @@ from utils import get_all_exercises_from_topsets, get_stats_from_topsets, get_wo
 class DataBase():
     def __init__(self, app):
         db_url = urlparse(os.environ['DATABASE_URL'])
+        # if db_url is null then throw error
+        if not db_url:
+            raise Exception("No DATABASE_URL environment variable set")
 
-        self.conn = psycopg2.connect(
-            database=db_url.path[1:],
-            user=db_url.username,
-            password=db_url.password,
-            host=db_url.hostname,
-            port=db_url.port
-        )
+    def getDB(self):
+        db = getattr(g, 'database', None)
+        if db is None:
+            db_url = urlparse(os.environ['DATABASE_URL'])
+            g.database = psycopg2.connect(
+                database=db_url.path[1:],
+                user=db_url.username,
+                password=db_url.password,
+                host=db_url.hostname,
+                port=db_url.port
+            )
+            db = g.database
+        return db
+
+    def close_connection(exception):
+        db = getattr(g, 'database', None)
+        if db is not None:
+            db.close()
 
     def execute(self, query, args=(), one=False, commit=False):
-        cur = self.conn.cursor(cursor_factory=RealDictCursor)
+        conn = self.getDB()
+        cur = conn.cursor(cursor_factory=RealDictCursor)
         cur.execute(query, args)
         rv = None
         if cur.description is not None:
             rv = cur.fetchall()
         if commit:
             try:
-                self.conn.commit()
+                conn.commit()
             except:
-                self.conn.rollback()
+                conn.rollback()
         cur.close()
 
         return (rv[0] if rv else None) if one else rv
@@ -119,6 +136,14 @@ class DataBase():
     def create_workout(self, person_id):
         now = datetime.now()
         date_string = now.strftime('%Y-%m-%d')
+        # check if a workout has already been created for this person today that doesnt contain any topsets and if so return the WorkoutId
+        workout = self.execute('SELECT workout_id AS "WorkoutId" FROM workout WHERE person_id=%s AND start_date=%s AND workout_id NOT IN (SELECT workout_id FROM topset)', [
+            person_id, date_string], one=True)
+        if workout:
+            print(
+                f'Workout already created for PersonId {person_id} starting at {date_string} so returning WorkoutId {workout["WorkoutId"]} rather then creating new workout')
+            return workout['WorkoutId']
+
         print(
             f'Creating workout for PersonId {person_id} starting at {date_string}')
         new_workout = self.execute('INSERT INTO workout (person_id, start_date) VALUES (%s, %s) RETURNING workout_id AS "WorkoutId"', [