如何使用Redis和Swift开发推荐系统功能

// 连接到Redis服务器
let redis = Redis()

guard redis.connect(host: "localhost", port: 6379, timeout: 10) else {
    print("无法连接到Redis服务器")
    return
}

// 构建用户画像
func buildUserProfile(userId: String, interests: [String], recentItems: [String]) {
    // 将用户ID作为哈希表的key
    redis.hset("user:(userId)", field: "interests", value: interests.joined(separator: ","))
    
    // 将最近浏览的商品ID存储在有序集合中
    let timestamp = Date().timeIntervalSince1970
    redis.zadd("user:(userId):recentItems", score: timestamp, member: recentItems.joined(separator: ","))
}

// 示例用法
buildUserProfile(userId: "12345", interests: ["电影", "音乐"], recentItems: ["1001", "1002", "1003"])

// 根据用户ID获取用户画像
func getUserProfile(userId: String) -> [String: String]? {
    let userProfile = redis.hgetall("user:(userId)"): [String: String]
    return userProfile
}

// 基于内容的推荐
func contentBasedRecommendation(userId: String) -> [String] {
    guard let userProfile = getUserProfile(userId: userId),
          let interests = userProfile["interests"]?.components(separatedBy: ",") else {
        return []
    }
    
    // 根据用户兴趣标签来获取相似的商品
    var recommendedItems: [String] = []
    
    for interest in interests {
        let similarItems = redis.smembers("interest:(interest)"): [String]
        recommendedItems.append(contentsOf: similarItems)
    }
    
    return recommendedItems
}

// 示例用法
let recommendedItems = conentBasedRecommendation(userId: "12345")
print(recommendedItems)