Migrate to chat endpoint

src/cogs/ollama.py

@@ -65,6 +65,63 @@ class OllamaView(View):
         self.stop()
 
 
+class ChatHistory:
+    def __init__(self):
+        self._internal = {}
+
+    def create_thread(self, member: discord.Member) -> str:
+        """
+        Creates a thread, returns its ID.
+        """
+        key = os.urandom(3).hex()
+        self._internal[key] = {
+            "member": member,
+            "messages": []
+        }
+        with open("./assets/ollama-prompt.txt") as file:
+            system_prompt = file.read()
+        self.add_message(
+            key,
+            "system",
+            system_prompt
+        )
+        return key
+
+    @staticmethod
+    def _construct_message(role: str, content: str, images: typing.Optional[list[str]]) -> dict[str, str]:
+        x = {
+            "role": role,
+            "content": content
+        }
+        if images:
+            x["images"] = images
+        return x
+
+    def add_message(
+            self,
+            thread: str,
+            role: typing.Literal["user", "assistant", "system"],
+            content: str,
+            images: typing.Optional[list[str]] = None
+    ) -> None:
+        """
+        Appends a message to the given thread.
+
+        :param thread: The thread's ID.
+        :param role: The author of the message.
+        :param content: The message's actual content.
+        :param images: Any images that were attached to the message, in base64.
+        :return: None
+        """
+        self._internal[thread]["messages"].append(self._construct_message(role, content, images))
+
+    def get_history(self, thread: str) -> list[dict[str, str]]:
+        """
+        Gets the history of a thread.
+        """
+        return self._internal[thread]["messages"].copy()  # copy() makes it immutable.
+
+
 SERVER_KEYS = list(CONFIG["ollama"].keys())
 
 
@@ -74,6 +131,7 @@ class Ollama(commands.Cog):
         self.log = logging.getLogger("jimmy.cogs.ollama")
         self.last_server = 0
         self.contexts = {}
+        self.history = ChatHistory()
 
     def next_server(self, increment: bool = True) -> str:
         """Returns the next server key."""
@@ -163,9 +221,6 @@ class Ollama(commands.Cog):
             if context not in self.contexts:
                 await ctx.respond("Invalid context key.")
                 return
-            return await ctx.respond("Context is currently disabled.", ephemeral=True)
-        with open("./assets/ollama-prompt.txt") as file:
-            system_prompt = file.read()
         await ctx.defer()
 
         model = model.casefold()
@@ -366,19 +421,24 @@ class Ollama(commands.Cog):
                 params["top_k"] = 500
                 params["top_p"] = 500
 
+            if context is None or context in self.contexts:
+                context = self.history.create_thread(ctx.user)
+            messages = self.history.get_history(context)
+            user_message = {
+                "role": "user",
+                "content": query
+            }
+            if image_data:
+                user_message["images"] = [image_data]
+            messages.append(user_message)
             payload = {
                 "model": model,
-                "prompt": query,
-                "system": system_prompt,
                 "stream": True,
                 "options": params,
+                "messages": messages
             }
-            if context is not None:
-                payload["context"] = self.contexts[context]
-            if image_data:
-                payload["images"] = [image_data]
             async with session.post(
-                "/api/generate",
+                "/api/chat",
                 json=payload,
             ) as response:
                 if response.status != 200:
@@ -394,16 +454,13 @@ class Ollama(commands.Cog):
 
                 last_update = time.time()
                 buffer = io.StringIO()
-                context = []
                 if not view.cancel.is_set():
                     async for line in self.ollama_stream(response.content):
-                        if "context" in line:
-                            context = line["context"]
-                        buffer.write(line["response"])
-                        embed.description += line["response"]
+                        buffer.write(line["assistant"])
+                        embed.description += line["assistant"]
                         embed.timestamp = discord.utils.utcnow()
                         if len(embed.description) >= 4096:
-                            embed.description = embed.description = "..." + line["response"]
+                            embed.description = embed.description = "..." + line["assistant"]
 
                         if view.cancel.is_set():
                             break
@@ -413,9 +470,9 @@ class Ollama(commands.Cog):
                             self.log.debug(f"Updating message ({last_update} -> {time.time()})")
                             last_update = time.time()
                 view.stop()
-                if context:
-                    self.contexts[key] = context
-                    embed.add_field(name="Context Key", value=key, inline=True)
+                self.history.add_message(context, "user", user_message["content"], user_message["images"])
+                self.history.add_message(context, "assistant", buffer.getvalue())
+                embed.add_field(name="Context Key", value=context, inline=True)
                 self.log.debug("Ollama finished consuming.")
                 embed.title = "Done!"
                 embed.colour = discord.Color.green()