feat(v2.5.0): add caching, request deduplication, and performance improvements

1 files changed, 26 insertions, 6 deletions

diff --git a/DomainDigCLI.swift b/DomainDigCLI.swift
index 73f7028..d0a4d86 100644
--- a/DomainDigCLI.swift
+++ b/DomainDigCLI.swift
@@ -14,19 +14,39 @@ struct DomainDigCLI {
         let wantsJSON = arguments.contains("--json") || arguments.contains("-j")
         let domains = arguments.filter { !$0.hasPrefix("-") }
 
-        guard let domain = domains.first, !domain.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty else {
+        let requestedDomains = domains
+            .map { $0.trimmingCharacters(in: .whitespacesAndNewlines) }
+            .filter { !$0.isEmpty }
+
+        guard !requestedDomains.isEmpty else {
             fputs("usage: domaindig <domain> [--json]\n", stderr)
             Foundation.exit(1)
         }
 
         let inspectionService = DomainInspectionService()
-        let report = await inspectionService.inspect(domain: domain)
+        var reports: [DomainReport] = []
+        var seen = Set<String>()
+
+        for domain in requestedDomains {
+            let normalizedDomain = domain.lowercased()
+            guard seen.insert(normalizedDomain).inserted else { continue }
+            reports.append(await inspectionService.inspect(domain: domain))
+        }
 
         do {
-            let data = try DomainReportExporter.data(
-                for: report,
-                format: wantsJSON ? .json : .text
-            )
+            let data: Data
+            if reports.count == 1, let report = reports.first {
+                data = try DomainReportExporter.data(
+                    for: report,
+                    format: wantsJSON ? .json : .text
+                )
+            } else {
+                data = try DomainReportExporter.data(
+                    for: reports,
+                    format: wantsJSON ? .json : .text,
+                    title: "DomainDig Batch Report"
+                )
+            }
             FileHandle.standardOutput.write(data)
             if data.last != 0x0A {
                 FileHandle.standardOutput.write(Data([0x0A]))