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import os
import json
import time
import gradio as gr
import google.generativeai as genai
from huggingface_hub import HfApi, hf_hub_download
from collections import deque
# APIキーの設定
genai.configure(api_key=os.getenv("GOOGLE_API_KEY"))
hf_token = os.getenv("HF_TOKEN")
hf_api = HfApi(token=hf_token)
# Hugging Faceデータセットの設定
REPO_ID = "Sakalti/Gemini_ai_chat"
DATASET_FILE = "characters.jsonl"
# Geminiモデルの初期化
model = genai.GenerativeModel(model_name='gemini-2.0-flash')
# レートリミット用
request_times = deque()
REQUEST_LIMIT = 15
TIME_WINDOW = 60 # 秒
def is_rate_limited():
now = time.time()
while request_times and now - request_times[0] > TIME_WINDOW:
request_times.popleft()
if len(request_times) >= REQUEST_LIMIT:
return True
else:
request_times.append(now)
return False
# キャラクターの取得関数
def fetch_characters():
try:
file_path = hf_hub_download(repo_id=REPO_ID, filename=DATASET_FILE, repo_type="dataset", token=hf_token)
with open(file_path, "r", encoding="utf-8") as f:
return [json.loads(line) for line in f if line.strip()]
except Exception as e:
print(f"[ERROR] fetch_characters: {e}")
return []
# キャラクターのアップロード関数
def upload_character(name, prompt):
characters = fetch_characters()
characters.append({"name": name, "prompt": prompt})
temp_file = "temp_characters.jsonl"
with open(temp_file, "w", encoding="utf-8") as f:
for char in characters:
f.write(json.dumps(char, ensure_ascii=False) + "\n")
hf_api.upload_file(
path_or_fileobj=temp_file,
path_in_repo=DATASET_FILE,
repo_id=REPO_ID,
repo_type="dataset"
)
os.remove(temp_file)
# 応答生成関数
def generate_response(message, history, temperature, top_p, top_k, max_output_tokens, system_prompt):
if is_rate_limited():
return "⚠️ 1分間に15回までです。しばらく待ってください。", history, history
gemini_history = []
if system_prompt:
gemini_history.append({"role": "user", "parts": [f"以下の指示に従ってAIキャラとして振る舞ってください：\n{system_prompt}"]})
for user, bot in history:
gemini_history.append({"role": "user", "parts": [user]})
gemini_history.append({"role": "model", "parts": [bot]})
gemini_history.append({"role": "user", "parts": [message]})
response = model.generate_content(
gemini_history,
generation_config={
"temperature": temperature,
"top_p": top_p,
"top_k": top_k,
"max_output_tokens": int(max_output_tokens),
}
)
history.append((message, response.text))
return "", history, history
# ===== 起動後にテーマ切替する仕組み =====
THEMES = {
"Eternalstar": "Sakalti/Eternalstar",
"Mountainrainbow": "Sakalti/mountanrainbow"
}
def switch_theme(choice):
"""
JSで<head>にあるテーマCSSリンクを書き換える。
"""
css_link = f"https://huggingface.co/spaces/{THEMES[choice]}/resolve/main/theme.css"
js_code = f"""
() => {{
let old = document.getElementById("dynamic-theme");
if (old) old.remove();
let link = document.createElement("link");
link.id = "dynamic-theme";
link.rel = "stylesheet";
link.href = "{css_link}";
document.head.appendChild(link);
}}
"""
return gr.HTML.update(value=""), gr.update(), js_code
with gr.Blocks(theme=THEMES["Mountainrainbow"]) as demo:
gr.Markdown("## Gemini AIキャラクターチャット")
# テーマ切り替えドロップダウン
theme_dropdown = gr.Dropdown(choices=list(THEMES.keys()), value="Eternalstar", label="テーマ切り替え")
with gr.Tab("チャット"):
chatbot = gr.Chatbot()
msg = gr.Textbox(placeholder="メッセージを入力...")
state = gr.State([])
system_prompt = gr.Textbox(label="キャラのシステムプロンプト", lines=4)
with gr.Row():
temperature = gr.Slider(0.0, 1.0, value=0.7, label="Temperature")
top_p = gr.Slider(0.0, 1.0, value=0.9, label="Top-p")
top_k = gr.Slider(1, 100, value=40, label="Top-k")
max_output_tokens = gr.Number(value=1024, label="Max Output Tokens", precision=0)
msg.submit(generate_response,
inputs=[msg, state, temperature, top_p, top_k, max_output_tokens, system_prompt],
outputs=[msg, chatbot, state])
with gr.Tab("キャラクター投稿"):
char_name = gr.Textbox(label="キャラクター名")
char_prompt = gr.Textbox(label="システムプロンプト", lines=5)
submit_char = gr.Button("キャラクターを追加")
char_status = gr.Textbox(label="ステータス", interactive=False)
def post_character(name, prompt):
try:
upload_character(name, prompt)
return "キャラクターをアップロードしました。"
except Exception as e:
return f"失敗しました: {e}"
submit_char.click(post_character, inputs=[char_name, char_prompt], outputs=[char_status])
with gr.Tab("キャラクター選択"):
character_list = gr.Dropdown(choices=[], label="使用するキャラクターを選択")
def refresh_characters():
return gr.update(choices=[c["name"] for c in fetch_characters()])
def load_prompt(name):
for c in fetch_characters():
if c.get("name") == name:
print(f"[DEBUG] 読み込み成功: {c}")
return c.get("prompt", "")
print("[DEBUG] キャラが見つかりません")
return ""
character_list.change(load_prompt, inputs=[character_list], outputs=[system_prompt])
demo.load(refresh_characters, outputs=[character_list])
# ドロップダウンでテーマ切り替え
theme_dropdown.change(
fn=switch_theme,
inputs=[theme_dropdown],
outputs=[gr.HTML(), gr.Textbox(), gr.HTML()],
_js="(theme) => { return theme; }"
)
demo.launch()
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