1→import Foundation
     2→
     3→// MARK: - PTAX API Response Models
     4→
     5→struct PTAXResponse<T: Codable>: Codable {
     6→    let value: [T]
     7→
     8→    enum CodingKeys: String, CodingKey {
     9→        case value
    10→    }
    11→}
    12→
    13→struct CurrencyInfo: Codable, Identifiable, Hashable {
    14→    var id: String { symbol }
    15→    let symbol: String
    16→    let formattedName: String
    17→    let currencyType: String
    18→
    19→    enum CodingKeys: String, CodingKey {
    20→        case symbol = "simbolo"
    21→        case formattedName = "nomeFormatado"
    22→        case currencyType = "tipoMoeda"
    23→    }
    24→
    25→    var flag: String {
    26→        switch symbol {
    27→        case "USD": return "🇺🇸"
    28→        case "EUR": return "🇪🇺"
    29→        case "GBP": return "🇬🇧"
    30→        case "JPY": return "🇯🇵"
    31→        case "CHF": return "🇨🇭"
    32→        case "CAD": return "🇨🇦"
    33→        case "AUD": return "🇦🇺"
    34→        case "CNY": return "🇨🇳"
    35→        case "ARS": return "🇦🇷"
    36→        case "MXN": return "🇲🇽"
    37→        default: return "💱"
    38→        }
    39→    }
    40→}
    41→
    42→struct DollarQuote: Codable, Identifiable {
    43→    var id: String { dataHoraCotacao }
    44→    let buyRate: Double
    45→    let sellRate: Double
    46→    let dataHoraCotacao: String
    47→
    48→    enum CodingKeys: String, CodingKey {
    49→        case buyRate = "cotacaoCompra"
    50→        case sellRate = "cotacaoVenda"
    51→        case dataHoraCotacao
    52→    }
    53→
    54→    var dateTime: Date? {
    55→        let formatter = DateFormatter()
    56→        formatter.dateFormat = "yyyy-MM-dd HH:mm:ss.SSS"
    57→        return formatter.date(from: dataHoraCotacao)
    58→    }
    59→
    60→    var formattedDate: String {
    61→        guard let date = dateTime else { return dataHoraCotacao }
    62→        let formatter = DateFormatter()
    63→        formatter.dateFormat = "dd/MM/yyyy"
    64→        return formatter.string(from: date)
    65→    }
    66→
    67→    var formattedTime: String {
    68→        guard let date = dateTime else { return "--" }
    69→        let formatter = DateFormatter()
    70→        formatter.dateFormat = "HH:mm:ss"
    71→        return formatter.string(from: date)
    72→    }
    73→}
    74→
    75→struct CurrencyQuote: Codable, Identifiable {
    76→    var id: String { "\(dataHoraCotacao)-\(tipoBoletim ?? "default")" }
    77→    let parityBuy: Double?
    78→    let paritySell: Double?
    79→    let buyRate: Double
    80→    let sellRate: Double
    81→    let dataHoraCotacao: String
    82→    let bulletinType: String?
    83→
    84→    enum CodingKeys: String, CodingKey {
    85→        case parityBuy = "paridadeCompra"
    86→        case paritySell = "paridadeVenda"
    87→        case buyRate = "cotacaoCompra"
    88→        case sellRate = "cotacaoVenda"
    89→        case dataHoraCotacao
    90→        case bulletinType = "tipoBoletim"
    91→    }
    92→
    93→    var tipoBoletim: String? { bulletinType }
    94→
    95→    var dateTime: Date? {
    96→        let formatter = DateFormatter()
    97→        formatter.dateFormat = "yyyy-MM-dd HH:mm:ss.SSS"
    98→        if let date = formatter.date(from: dataHoraCotacao) {
    99→            return date
   100→        }
   101→        formatter.dateFormat = "yyyy-MM-dd HH:mm:ss.SS"
   102→        return formatter.date(from: dataHoraCotacao)
   103→    }
   104→
   105→    var formattedDate: String {
   106→        guard let date = dateTime else { return dataHoraCotacao }
   107→        let formatter = DateFormatter()
   108→        formatter.dateFormat = "dd/MM/yyyy"
   109→        return formatter.string(from: date)
   110→    }
   111→
   112→    var formattedTime: String {
   113→        guard let date = dateTime else { return "--" }
   114→        let formatter = DateFormatter()
   115→        formatter.dateFormat = "HH:mm:ss"
   116→        return formatter.string(from: date)
   117→    }
   118→
   119→    var isPTAXClosing: Bool {
   120→        bulletinType?.lowercased().contains("fechamento") == true ||
   121→        bulletinType?.lowercased().contains("ptax") == true
   122→    }
   123→}
   124→
   125→// MARK: - Display Model
   126→
   127→struct CurrencyDisplayData: Identifiable {
   128→    let id = UUID()
   129→    let symbol: String
   130→    let name: String
   131→    let flag: String
   132→    let buyRate: Double
   133→    let sellRate: Double
   134→    let change: Double
   135→    let changePercent: Double
   136→    let lastUpdate: Date?
   137→    let history: [DollarQuote]
   138→
   139→    var isPositive: Bool { change >= 0 }
   140→
   141→    var formattedBuyRate: String {
   142→        buyRate.toBRL()
   143→    }
   144→
   145→    var formattedSellRate: String {
   146→        sellRate.toBRL()
   147→    }
   148→
   149→    var formattedChange: String {
   150→        let prefix = change >= 0 ? "+" : ""
   151→        return "\(prefix)\(String(format: "%.4f", change))"
   152→    }
   153→
   154→    var formattedChangePercent: String {
   155→        let prefix = changePercent >= 0 ? "↑" : "↓"
   156→        return "\(prefix) \(String(format: "%.2f", abs(changePercent)))%"
   157→    }
   158→}
   159→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>