Strategy_Context.swift

import Foundation

class User {
    var posts: [Post] = [Post]()
    
    func addPost(_ post: Post) -> Void {
        posts.append(post)
    }
    
    func analyzePosts(_ strategy: PostAnalyzeStrategy) -> Void {
        strategy.analyze(self.posts)
    }
}

class Post {
    var text: String?
    var likeCount: Int = 0
    var sadCount: Int = 0
    var laughCount: Int = 0
    
    init(_ text: String) {
        self.text = text
    }
    
    convenience init(_ text: String, _ likeCount: Int, _ sadCount: Int, _ laughCount: Int) {
        self.init(text)
        self.likeCount = likeCount
        self.sadCount = sadCount
        self.laughCount = laughCount
    }
}