refactor: system类命令

pkg/qqbot/cmds/system/help.py

@@ -0,0 +1,38 @@
+from ..mgr import AbstractCommandNode, Context, __command_list__
+
+
+@AbstractCommandNode.register(
+    parent=None,
+    name="help",
+    description="显示帮助信息",
+    usage="!help\n!help <指令名称>",
+    aliases=[],
+    privilege=1
+)
+class HelpCommand(AbstractCommandNode):
+    @classmethod
+    def process(cls, ctx: Context) -> tuple[bool, list]:
+        command_list = __command_list__
+
+        reply = []
+
+        if len(ctx.params) == 0:
+            reply_str = "[bot]当前所有指令:\n\n"
+
+            # 遍历顶级指令
+            for key in command_list:
+                command = command_list[key]
+                if command['parent'] is None:
+                    reply_str += "!{} - {}\n".format(key, command['description'])
+
+            reply_str += "\n请使用 !help <指令名称> 来查看指令的详细信息"
+
+            reply = [reply_str]
+        else:
+            command_name = ctx.params[0]
+            if command_name in command_list:
+                reply = [command_list[command_name]['cls'].help()]
+            else:
+                reply = ["[bot]指令 {} 不存在".format(command_name)]
+
+        return True, reply