package main import "time" var allReactions = []Reaction{ { ID: "fire", Label: "🔥", }, { ID: "thinking", Label: "🤔", }, { ID: "heart", Label: "🩵", }, { ID: "laugh", Label: "😂", }, { ID: "sad", Label: "😢", }, } func mustReactionByID(id string) Reaction { for _, r := range allReactions { if r.ID == id { return r } } panic("reaction not found") } type Reaction struct { ID string Label string } type Post struct { ID int Author string Content string CreatedAt time.Time Views int Reactions map[string]int } type PostStats struct { ID int Views int ViewsUpdated bool Reactions map[string]int ReactionUpdated *string }