added dependency checking

- Dependency install states will be checked and will be automatically installed if it isn't.

dance.py

@@ -1,3 +1,36 @@
+import os
+
+def check_dependencies(): 
+    def check_dependency_aiohttp(): 
+        while True:
+            try: 
+                import aiohttp
+            except: 
+                os.system('pip3 install aiohttp==3.7.4')
+            else: 
+                break
+
+    def check_dependency_hidapi():
+        while True: 
+            try: 
+                import hid
+            except: 
+                os.system('pip3 install hidapi'); os.system('pip3 install hid')
+            else: 
+                break
+
+    def check_dependency_websockets():
+        while True: 
+            try: 
+                import websockets
+            except: 
+                os.system('pip3 install websockets')
+            else: 
+                break
+    
+    check_dependency_aiohttp(); check_dependency_hidapi(); check_dependency_websockets()
+
+
 import asyncio
 import json
 import logging
@@ -13,14 +46,14 @@ import hid
 from aiohttp import WSMsgType, web
 
 from joydance import JoyDance, PairingState
-from joydance.constants import (DEFAULT_CONFIG, JOYDANCE_VERSION,
-                                WsSubprotocolVersion)
+from joydance.constants import (DEFAULT_CONFIG, JOYDANCE_VERSION, WsSubprotocolVersion)
 from pycon import ButtonEventJoyCon, JoyCon
 from pycon.constants import JOYCON_PRODUCT_IDS, JOYCON_VENDOR_ID
 
 logging.getLogger('asyncio').setLevel(logging.WARNING)
 
-
+def main(): 
+    try:
         class WsCommand(Enum):
             GET_JOYCON_LIST = 'get_joycon_list'
             CONNECT_JOYCON = 'connect_joycon'
@@ -260,24 +293,20 @@ def save_config(parser):
 
 
         async def on_startup(app):
-    print('''
-     ░░  ░░░░░░  ░░    ░░ ░░░░░░   ░░░░░  ░░░    ░░  ░░░░░░ ░░░░░░░
-     ▒▒ ▒▒    ▒▒  ▒▒  ▒▒  ▒▒   ▒▒ ▒▒   ▒▒ ▒▒▒▒   ▒▒ ▒▒      ▒▒
-     ▒▒ ▒▒    ▒▒   ▒▒▒▒   ▒▒   ▒▒ ▒▒▒▒▒▒▒ ▒▒ ▒▒  ▒▒ ▒▒      ▒▒▒▒▒
-▓▓   ▓▓ ▓▓    ▓▓    ▓▓    ▓▓   ▓▓ ▓▓   ▓▓ ▓▓  ▓▓ ▓▓ ▓▓      ▓▓
- █████   ██████     ██    ██████  ██   ██ ██   ████  ██████ ███████
-
-Open http://localhost:32623 in your browser.''')
+            os.system('clear')
 
             # Check for update
             async with aiohttp.ClientSession() as session:
                 async with session.get('https://api.github.com/repos/redphx/joydance/releases/latest', ssl=False) as resp:
                     json_body = await resp.json()
                     latest_version = json_body['tag_name'][1:]
-            print('Running version {}.'.format(JOYDANCE_VERSION))
+                    print('JoyDance V{}.'.format(JOYDANCE_VERSION))
                     if JOYDANCE_VERSION != latest_version:
                         print('\033[93m{}\033[00m'.format('Version {} is available: https://github.com/redphx/joydance'.format(latest_version)))
             
+            time.sleep(2)
+            os.system('open "http://localhost:32623"')
+
 
         async def html_handler(request):
             config = dict((parse_config()).items('joydance'))
@@ -343,3 +372,14 @@ app.add_routes([
         ])
 
         web.run_app(app, port=32623)
+    
+    except KeyboardInterrupt: 
+        os.system('clear')
+        return(0)
+    
+    except TypeError: 
+        os.system('clear')
+        return(0)
+
+check_dependencies()
+main()