TodosApp/Todos/Model/Project.swift

//
//  Project.swift
//  Todos
//
//  Created by Sam Jaffe on 2/28/26.
//

import Foundation
import SwiftData

@Model
final class Project : Codable {
  var timestamp: Date
  var category: String = ""
  var name: String = "New Project"
  @Relationship(deleteRule: .nullify)
  var tasks: [Task] = []
  
  init(timestamp: Date) {
    self.timestamp = timestamp
  }
  
  func yaml(_ indent: Int = 0) -> String {
    let h1 = String(repeating: "  ", count: indent)
    var rval = h1 + "\(name):\n"
    if !category.isEmpty {
      rval += h1 + "  # In Category: \(category)\n"
    }
    rval += tasks.map({ $0.yaml(indent + 1) }).joined()
    return rval
  }
  
  enum CodingKeys : CodingKey { case timestamp, category, name, tasks }

  required init(from decoder: any Decoder) throws {
    let container = try decoder.container(keyedBy: CodingKeys.self)
    timestamp = try container.decode(Date.self, forKey: .timestamp)
    category = try container.decode(String.self, forKey: .category)
    name = try container.decode(String.self, forKey: .name)
    tasks = try container.decode([Task].self, forKey: .tasks)
  }
  
  func encode(to encoder: any Encoder) throws {
    var container = encoder.container(keyedBy: CodingKeys.self)
    try container.encode(timestamp, forKey: .timestamp)
    try container.encode(category, forKey: .category)
    try container.encode(tasks, forKey: .tasks)
    try container.encode(name, forKey: .name)
  }
}