MongoView/MongoView/StatusManager.swift

//
//  StatusManager.swift
//  MongoView
//
//  Created by Shadowfacts on 7/7/20.
//  Copyright © 2020 Shadowfacts. All rights reserved.
//

import Foundation

struct StatusManager {
    private(set) var statuses = [Category: Status]()

    var mostRelevant: Status? {
        for category in Category.sortedByPriority {
            if let status = statuses[category] {
                return status
            }
        }
        return nil
    }
    
    mutating func set(_ message: String, for category: Category, override: Bool = false) {
        statuses[category] = Status(message: message, category: category)
        
        if override {
            for other in Category.allCases where other < category {
                remove(for: other)
            }
        }
    }
    
    mutating func remove(for category: Category) {
        statuses.removeValue(forKey: category)
    }
    
    enum Category: Int, Comparable, CaseIterable {
        case document
        case query
        case connection

        static let sortedByPriority = allCases.sorted()
        
        static func < (lhs: StatusManager.Category, rhs: StatusManager.Category) -> Bool {
            return lhs.rawValue < rhs.rawValue
        }
    }
    
    struct Status {
        let message: String
        let category: Category
        let timestamp = Date()
    }
}