Hey all,

I'm currently in day 61 of 100 Days of SwiftUI, and wanted to put some of the knowledge into creating a watchlist app that displays a list of episodes of a series and shows whether you've watched an episode or not.

My goal is to be able to mark an episode as watched, ultimately toggling a watched bool property for any given episode object.

I've created an Episode struct:

struct Episode: Codable, Hashable {
    let episode: String
    let title: String
    let isFiller: Bool
    var watched: Bool
}

Mapped to an array of JSON objects:

[
    {
        "episode": "1",
        "title": "Homecoming",
        "isFiller": false,
        "watched": false
    },
    {
        "episode": "2",
        "title": "The Akatsuki Makes Its Move",
        "isFiller": false,
        "watched": false
    },
    {
        "episode": "3",
        "title": "The Results of Training",
        "isFiller": false,
        "watched": false
    }
]

I'm decoding the JSON file in my ContentView with Paul's handy Bundle extension.

let episodes = Bundle.main.decode([Episode].self, from: "episodesData.json")

And within an EpisodeView for each episode of the list, I'd like to display a Button that allows the user to mark the episode as watched. Here's what I have so far:

Button(episode.watched ? "Mark as unwatched" : "Mark as watched") {
    // Should I be doing this?
    var episodeStruct = Episode(episode: episode.episode,
                                title: episode.title, isFiller: episode.isFiller,
                                watched: episode.watched)

    // Set watched value to watched in this case
    episodeStruct.watched.toggle()

    // How to append this new data to JSON instead of the one I have now that I want to update?

    print("Watched")
}

I've tried to decipher this on my own by reviewing this forum thread, but I can't figure it out as the JSON structure is somewhat different and I'm still not too well-versed with this topic.

Would appreciate any help/explanation 🙏