Notification screenshot option should only be available to webdriver/playwright watches, screenshot sent as JPEG to save bandwidth, Simplify the logic around screenshot, (#1140)

changedetectionio/model/Watch.py

@@ -248,7 +248,28 @@ class model(dict):
         if os.path.isfile(fname):
             return fname
 
-        return False
+        # False is not an option for AppRise, must be type None
+        return None
+
+    def get_screenshot_as_jpeg(self):
+        """Best used in notifications due to its smaller size"""
+        png_fname = os.path.join(self.watch_data_dir, "last-screenshot.png")
+        jpg_fname = os.path.join(self.watch_data_dir, "last-screenshot.jpg")
+
+        if os.path.isfile(jpg_fname):
+            return jpg_fname
+
+        if os.path.isfile(png_fname) and not os.path.isfile(jpg_fname):
+            # Doesnt exist, so create the JPEG from the PNG
+            from PIL import Image
+            im1 = Image.open(png_fname)
+            im1.convert('RGB').save(jpg_fname, quality=int(os.getenv("NOTIFICATION_SCREENSHOT_JPG_QUALITY", 75)))
+            return jpg_fname
+
+
+        # False is not an option for AppRise, must be type None
+        return None
+
 
     def __get_file_ctime(self, filename):
         fname = os.path.join(self.watch_data_dir, filename)