PM

pico.js

     posts: [],
     users: [],
 }
+
+/*
+*
+* GUI
+*
+*/
 const autoFocus = (vnode) => {
     vnode.dom.focus()
 }
 }
 m.mount(document.body, Main)
 
+/*
+*
+* WEBSOCKETS
+*
+*/
 const connect = (username) => {
     const wsUrl = location.href.replace('http', 'ws')
 

pico.py

             text = data['text']
             if not text:
                 continue
-            await broadcast(kind='post', source=ws.username, text=text)
+            elif 'target' in data:
+                targets = {ss for ss in sockets if ss.username in {ws.username, data['target']}}
+                await send_json_many(ts=ts, targets=targets, kind='post', source=ws.username, text=text)
+            else:
+                await broadcast(kind='post', source=ws.username, text=text)
 
         elif data['action'] == 'logout':
             sockets.discard(ws)

test.py

     return _test(client1, client2)
 
 
+def test_private_message():
+    client1 = _make_client('ws://localhost:8642/', 0.10, Script()
+        + {'action': 'login', 'username': 'Norman'}
+        - {'kind': 'update', 'users': ['Norman'], 'info': 'Welcome to /', 'username': 'Norman'}
+        - {'kind': 'update', 'users': ['Norman', 'Ray'], 'info': 'Ray joined'}
+        - {'kind': 'update', 'users': ['Emma', 'Norman', 'Ray'], 'info': 'Emma joined'}
+        + {'action': 'post', 'target': 'Emma', 'text': 'なに？'}
+        - {'kind': 'post', 'source': 'Norman', 'text': 'なに？'}
+        - {'kind': 'update', 'users': ['Norman', 'Ray'], 'info': 'Emma left'}
+    )
+    client2 = _make_client('ws://localhost:8642/', 0.11, Script()
+        + {'action': 'login', 'username': 'Ray'}
+        - {'kind': 'update', 'users': ['Norman', 'Ray'], 'info': 'Welcome to /', 'username': 'Ray'}
+        - {'kind': 'update', 'users': ['Emma', 'Norman', 'Ray'], 'info': 'Emma joined'}
+        - {'kind': 'update', 'users': ['Norman', 'Ray'], 'info': 'Emma left'}
+        - {'kind': 'update', 'users': ['Ray'], 'info': 'Norman left'}
+    )
+    client3 = _make_client('ws://localhost:8642/', 0.12, Script()
+        + {'action': 'login', 'username': 'Emma'}
+        - {'kind': 'update', 'users': ['Emma', 'Norman', 'Ray'], 'info': 'Welcome to /', 'username': 'Emma'}
+        - {'kind': 'post', 'source': 'Norman', 'text': 'なに？'}
+    )
+    return _test(client1, client2, client3)
+
+
 if __name__ == '__main__':
     loop = asyncio.get_event_loop()
     for fn_name, fn in list(locals().items()):