feat: 添加公告功能

pkg/utils/announcement.py

@@ -0,0 +1,44 @@
+import base64
+import os
+
+import requests
+
+
+def read_latest() -> str:
+    resp = requests.get(
+        url="https://api.github.com/repos/RockChinQ/QChatGPT/contents/res/announcement",
+    )
+    obj_json = resp.json()
+    b64_content = obj_json["content"]
+    # 解码
+    content = base64.b64decode(b64_content).decode("utf-8")
+    return content
+
+
+def read_saved() -> str:
+    # 已保存的在res/announcement_saved
+    # 检查是否存在
+    if not os.path.exists("res/announcement_saved"):
+        with open("res/announcement_saved", "w") as f:
+            f.write("")
+
+    with open("res/announcement_saved", "r") as f:
+        content = f.read()
+
+    return content
+
+
+def write_saved(content: str):
+    # 已保存的在res/announcement_saved
+    with open("res/announcement_saved", "w") as f:
+        f.write(content)
+
+
+def fetch_new() -> str:
+    latest = read_latest()
+    saved = read_saved()
+    if latest.replace(saved, "").strip() == "":
+        return ""
+    else:
+        write_saved(latest)
+        return latest.replace(saved, "").strip()