Yes, it's too bad that someone told her about the plan beforehand and ruined Harry's surprise.

有人事先告诉她，破坏了哈利的惊喜，真是糟糕。

youdao

And developing a... kind of plan for what to do if there's a disagreement beforehand.

提前制定一套应对矛盾的方案。

又有趣又奇特的课堂 - SpeakingMax英语口语达人

Dominique de Villepin, another former prime minister, was forced to abandon a labour-market reform in 2006 after huge street demonstrations and sit-ins, provoked in part by his refusal even to discuss the plan beforehand.

ECONOMIST: France's economic reforms