Function demoteAdminInTarget

admin_board/admin_board.ts:1051–1080

(
  target: TargetChat,
  user: Api.User,
)

    const inputChannel = await client.getInputEntity(target.entity as any);
    await client.invoke(
      new Api.channels.EditAdmin({
        channel: inputChannel as any,
        userId: inputUser as any,
        adminRights: new Api.ChatAdminRights({}),
        rank: "",
      }),
    );
    return;
  }

  await client.invoke(
    new Api.messages.EditChatAdmin({
      chatId: (target.entity as any).id,
      userId: inputUser as any,
      isAdmin: false as any,
    }),
  );
}

function isPotentialUserIdentifier(text: string): boolean {
  const trimmed = text.trim();
  return /^-?\d+$/.test(trimmed) || /^@[A-Za-z0-9_]{3,}$/.test(trimmed);
}

function parseUserIdentifiers(raw: string): string[] | null {
  const parts = raw
    .split(/[，,]/g)
    .map((part) => part.trim())
    .filter((part) => part.length > 0);

  if (parts.length === 0) return null;
  if (parts.some((part) => !isPotentialUserIdentifier(part))) return null;