Added spinner

src/cpl/console/console.py

@@ -1,4 +1,6 @@
 import os
+import sys
+from collections import Callable
 from typing import Union, Optional
 
 import pyfiglet
@@ -7,6 +9,7 @@ from termcolor import colored
 
 from cpl.console.background_color import BackgroundColor
 from cpl.console.foreground_color import ForegroundColor
+from cpl.console.spinner_thread import SpinnerThread
 
 
 class Console:
@@ -203,3 +206,16 @@ class Console:
         if not cls._is_first_write:
             cls._output('', end='')
         cls._output(string, x, y, end='')
+
+    @classmethod
+    def spinner(cls, message: str, call: Callable):
+        cls.write(message)
+        spinner = SpinnerThread(cls)
+        spinner.start()
+        call()
+        spinner.stop_spinning()
+        cls.write_line()
+
+    @classmethod
+    def flush(cls):
+        sys.stdout.flush()

src/cpl/console/spinner_thread.py

@@ -0,0 +1,31 @@
+import threading
+import time
+
+
+class SpinnerThread(threading.Thread):
+
+    def __init__(self, console):
+        threading.Thread.__init__(self)
+
+        self._console = console
+        self._is_spinning = True
+
+    @staticmethod
+    def _spinner():
+        while True:
+            for cursor in '|/-\\':
+                yield cursor
+
+    def run(self) -> None:
+        spinner = self._spinner()
+        while self._is_spinning:
+            self._console.write(next(spinner))
+            time.sleep(0.1)
+            self._console.write('\b')
+            self._console.flush()
+
+        self._console.write(' ')
+
+    def stop_spinning(self):
+        self._is_spinning = False
+        time.sleep(0.1)