1 files changed, 157 insertions, 0 deletions
diff --git a/DomainDig/DomainViewModel.swift b/DomainDig/DomainViewModel.swift
new file mode 100644
index 0000000..2965dde
--- /dev/null
+++ b/DomainDig/DomainViewModel.swift
@@ -0,0 +1,157 @@
+import Foundation
+import SwiftUI
+
+@MainActor
+@Observable
+final class DomainViewModel {
+    var domain: String = ""
+
+    var dnsSections: [DNSSection] = []
+    var dnsLoading = false
+    var dnsError: String?
+
+    var sslInfo: SSLCertificateInfo?
+    var sslLoading = false
+    var sslError: String?
+
+    var hasRun = false
+    private(set) var searchedDomain: String = ""
+
+    private static let recentSearchesKey = "recentSearches"
+    private static let maxRecent = 20
+
+    var recentSearches: [String] = UserDefaults.standard.stringArray(forKey: recentSearchesKey) ?? []
+
+    var trimmedDomain: String {
+        domain
+            .trimmingCharacters(in: .whitespacesAndNewlines)
+            .replacingOccurrences(of: "https://", with: "")
+            .replacingOccurrences(of: "http://", with: "")
+            .components(separatedBy: "/").first ?? ""
+    }
+
+    func run() {
+        let target = trimmedDomain
+        guard !target.isEmpty else { return }
+
+        addRecentSearch(target)
+        searchedDomain = target
+        hasRun = true
+        dnsSections = []
+        dnsError = nil
+        dnsLoading = true
+        sslInfo = nil
+        sslError = nil
+        sslLoading = true
+
+        Task {
+            await withTaskGroup(of: Void.self) { group in
+                group.addTask { @MainActor in
+                    await self.runDNS(domain: target)
+                }
+                group.addTask { @MainActor in
+                    await self.runSSL(domain: target)
+                }
+            }
+        }
+    }
+
+    private func runDNS(domain: String) async {
+        do {
+            let sections = await DNSLookupService.lookupAll(domain: domain)
+            dnsSections = sections
+        }
+        dnsLoading = false
+    }
+
+    private func runSSL(domain: String) async {
+        do {
+            let info = try await SSLCheckService.check(domain: domain)
+            sslInfo = info
+        } catch {
+            sslError = error.localizedDescription
+        }
+        sslLoading = false
+    }
+
+    /// True when both lookups have finished (regardless of success/failure).
+    var resultsLoaded: Bool {
+        hasRun && !dnsLoading && !sslLoading
+    }
+
+    // MARK: - Export
+
+    func exportText() -> String {
+        let dateFmt = DateFormatter()
+        dateFmt.dateFormat = "yyyy-MM-dd HH:mm"
+        let now = dateFmt.string(from: Date())
+
+        var lines: [String] = [
+            "DomainDig Export",
+            "Domain: \(searchedDomain)",
+            "Date: \(now)",
+            "",
+            "DNS Records",
+            "-----------"
+        ]
+
+        for section in dnsSections {
+            lines.append(section.recordType.rawValue)
+            if let error = section.error {
+                lines.append("  Error: \(error)")
+            } else if section.records.isEmpty {
+                lines.append("  No records found")
+            } else {
+                for record in section.records {
+                    lines.append("  \(record.value)  TTL \(record.ttl)")
+                }
+            }
+            if !section.wildcardRecords.isEmpty {
+                lines.append("*.\(searchedDomain)")
+                for record in section.wildcardRecords {
+                    lines.append("  \(record.value)  TTL \(record.ttl)")
+                }
+            }
+        }
+
+        if let info = sslInfo {
+            let certDateFmt = DateFormatter()
+            certDateFmt.dateStyle = .medium
+            certDateFmt.timeStyle = .none
+
+            lines.append("")
+            lines.append("SSL / TLS Certificate")
+            lines.append("---------------------")
+            lines.append("Common Name: \(info.commonName)")
+            lines.append("Issuer: \(info.issuer)")
+            lines.append("SANs: \(info.subjectAltNames.joined(separator: ", "))")
+            lines.append("Valid From: \(certDateFmt.string(from: info.validFrom))")
+            lines.append("Valid Until: \(certDateFmt.string(from: info.validUntil))")
+            lines.append("Days Until Expiry: \(info.daysUntilExpiry)")
+            lines.append("Chain Depth: \(info.chainDepth)")
+        } else if let error = sslError {
+            lines.append("")
+            lines.append("SSL / TLS Certificate")
+            lines.append("---------------------")
+            lines.append("Error: \(error)")
+        }
+
+        return lines.joined(separator: "\n")
+    }
+
+    // MARK: - Recent Searches
+
+    private func addRecentSearch(_ domain: String) {
+        recentSearches.removeAll { $0.lowercased() == domain.lowercased() }
+        recentSearches.insert(domain, at: 0)
+        if recentSearches.count > Self.maxRecent {
+            recentSearches = Array(recentSearches.prefix(Self.maxRecent))
+        }
+        UserDefaults.standard.set(recentSearches, forKey: Self.recentSearchesKey)
+    }
+
+    func clearRecentSearches() {
+        recentSearches.removeAll()
+        UserDefaults.standard.removeObject(forKey: Self.recentSearchesKey)
+    }
+}