allow system prompt env; fix textual interface issues

Author: iamlemec

oneping/interface/textual.py

@@ -256,7 +256,8 @@ def __init__(self, chat, store=None, **kwargs):
 
     def compose(self):
         yield Header(id='header')
-        yield Sidebar(convo=self.store.convo)
+        if self.store is not None:
+            yield Sidebar(convo=self.store.convo)
         yield ChatWindow(self.chat.stream_async, system=self.chat.system)
 
     def on_mount(self):
@@ -268,7 +269,9 @@ def action_toggle_sidebar(self):
             self.show_sidebar = not self.show_sidebar
 
     def watch_show_sidebar(self, show_sidebar):
-        self.query_one(Sidebar).set_class(show_sidebar, "-visible")
+        if self.store is not None:
+            sidebar = self.query_one(Sidebar)
+            sidebar.set_class(show_sidebar, "-visible")
 
 # textual powered chat interface
 def main(store=None, **kwargs):

oneping/providers.py

@@ -1,13 +1,15 @@
 # default arguments
 
-from .utils import load_image_uri, parse_image_uri
+import os
+
+from .utils import parse_image_uri
 
 ##
 ## system prompt
 ##
 
-DEFAULT_SYSTEM = 'You are a helpful and knowledgeable AI assistant. Answer the queries provided to the best of your ability.'
-DEFAULT_MAX_TOKENS = 1024
+DEFAULT_SYSTEM = os.environ.get('ONEPING_SYSTEM', None)
+DEFAULT_MAX_TOKENS = int(os.environ.get('ONEPING_MAX_TOKENS', 1024))
 
 ##
 ## models