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Custom URL Schemeを便利に使うためのStruct

Last updated at Posted at 2020-06-24

Custom URL SchemeのURL文字列をSwift上で使用できるようにパースするための構造体を考えたのでメモ。

想定URL形式: someApp://home/articleDetail?userId=100&articleId=200&searchText=hoge

Custom URL Scheme自体の実装はこちらを参照。
Custom URL Schemeでアプリ内の任意のページを表示する

// DeepLinkHierarchy.swift

struct DeepLinkHierarchy {
    enum TabType: String {
        case home // ※サンプルケース
        case article // ※サンプルケース
        case setting // ※サンプルケース
        case myPage // ※サンプルケース
        case none // ※サンプルケース
    }

    enum ScreenNameType: String {
        case articleDetail
        case archive
        case changeAccount
        case none
    }
    
    var tabType: TabType
    var screenNameType: ScreenNameType
    var query: DeepLinkQuery
    
    init(host tabText: String, query queryText: String) {
        tabType = TabType(rawValue: tabText) ?? .none
        screenNameType = ScreenNameType(rawValue: path) ?? .none
        query = DeepLinkQuery(queryText)
    }
}

struct DeepLinkQuery {
    var userId: Int? // ※サンプルプロパティ
    var articleId: Int? // ※サンプルプロパティ
    var searchText: String? // ※サンプルプロパティ
    
    init(_ query: String) {
        if let userIdText = query.getValue(by: "userId") {
            userId = Int(userIdText)
        }
        if let articleIdText = query.getValue(by: "articleIdText") {
            articleId = Int(articleIdText)
        }
        searchText = query.getValue(by: "searchText")
    }
}

private extension String {
    func getValue(by key: String) -> String? {
        return components(separatedBy: "&")
            .map({ $0.components(separatedBy: "=") })
            .first(where: { $0.first == key })?[1]
    }
}

TabTypeと命名しているのは、UITabBarを利用している前提のもと、どのタブをルートとしておくかの判定に利用する想定とした。
また、ルートタブを指定しつつ、遷移先画面をScreenNameTypeで判別する。

// AppDelegate.swift

func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any] = [:]) -> Bool {
        let deepLinkHierarchy = DeepLinkHierarchy(host: url.host ?? "", query: url.query ?? "")
        print("tabType: \(deepLinkHierarchy.tabType)")
        print("UserId: \(deepLinkHierarchy.query.userId)")
        print("articleId: \(deepLinkHierarchy.query.articleId)")
        print("searchText: \(deepLinkHierarchy.query.searchText)")
        return true
    }

ログアウトプット

tabType: home
UserId: Optional(100)
articleId: Optional(200)
searchText: Optional("hoge")
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