refactor webui

Former-commit-id: 813ecd8e51949c21ab6fbaa51cc2b1a84ee07952

src/llmtuner/webui/engine.py

@@ -0,0 +1,46 @@
+import gradio as gr
+from gradio.components import Component # cannot use TYPE_CHECKING here
+from typing import Any, Dict, Generator, List, Optional, Tuple
+
+from llmtuner.webui.chatter import WebChatModel
+from llmtuner.webui.common import get_model_path, list_dataset, CONFIG_CLASS
+from llmtuner.webui.locales import LOCALES
+from llmtuner.webui.manager import Manager
+from llmtuner.webui.runner import Runner
+from llmtuner.webui.utils import get_time
+
+
+class Engine:
+
+    def __init__(self, init_chat: Optional[bool] = False) -> None:
+        self.manager: "Manager" = Manager()
+        self.runner: "Runner" = Runner(self.manager)
+        self.chatter: "WebChatModel" = WebChatModel(manager=self.manager, lazy_init=(not init_chat))
+
+    def resume(self, config: CONFIG_CLASS) -> Generator[Dict[Component, Dict[str, Any]], None, None]:
+        lang = config.get("lang", None) or "en"
+
+        resume_dict = {
+            "top.config": {"value": config},
+            "top.lang": {"value": lang},
+            "train.dataset": {"choices": list_dataset()["choices"]},
+            "eval.dataset": {"choices": list_dataset()["choices"]},
+            "infer.chat_box": {"visible": self.chatter.loaded}
+        }
+
+        if config.get("last_model", None):
+            resume_dict["top.model_name"] = {"value": config["last_model"]}
+            resume_dict["top.model_path"] = {"value": get_model_path(config, config["last_model"])}
+
+        yield {self.manager.get_elem(k): gr.update(**v) for k, v in resume_dict.items()}
+
+        if self.runner.alive:
+            pass # TODO: restore training
+        else:
+            resume_dict = {"train.output_dir": {"value": get_time()}} # TODO: xxx
+
+    def change_lang(self, lang: str) -> Dict[Component, Dict[str, Any]]:
+        return {
+            component: gr.update(**LOCALES[name][lang])
+            for elems in self.manager.all_elems.values() for name, component in elems.items()
+        }