Packages/ICCeryCore/Sources/ICCeryCore/Files/ArtefactFiles.swift

@@ -0,0 +1,28 @@
+import Foundation
+
+/// Small host-side file helpers (issue #6).
+public enum ArtefactFiles {
+
+    /// `get_default_working_dir` — `resolveSafeCwd(nil)`.
+    public static func defaultWorkingDirectory() -> URL {
+        PathSecurity.resolveSafeCwd(nil)
+    }
+
+    /// `read_file_base64` — for **text artefacts** the UI needs verbatim
+    /// (ti1/ti2 previews, CGATS datasets, logs). Binary payloads (TIFF)
+    /// go through `TiffPreview` instead.
+    public static func readBase64(_ url: URL) throws -> String {
+        try Data(contentsOf: url).base64EncodedString()
+    }
+
+    /// `get_app_info` — version + build for the About dialog.
+    public static func appInfo(
+        bundle: Bundle = .main
+    ) -> (version: String, build: String) {
+        let info = bundle.infoDictionary ?? [:]
+        return (
+            info["CFBundleShortVersionString"] as? String ?? "0.0.0",
+            info["CFBundleVersion"] as? String ?? "0"
+        )
+    }
+}

Packages/ICCeryCore/Sources/ICCeryCore/Files/Ti2Header.swift

@@ -0,0 +1,53 @@
+import Foundation
+
+/// Parsed header of a `.ti2` chart-layout file (docs/06 §Resume).
+/// `parse_ti2_header` reads only CGATS keyword lines — the data grid
+/// itself belongs to issue #30.
+public struct Ti2Header: Sendable, Equatable {
+    /// `TARGET_INSTRUMENT` (e.g. `i1`, `i1iO`, `CM`).
+    public var instrument: String?
+    /// `NUMBER_OF_SETS` — the patch count. Note: `NUMBER_OF_FIELDS` is
+    /// the CGATS column count, *not* the patch count.
+    public var patchCount: Int?
+    /// `NUMBER_OF_PAGES`.
+    public var pageCount: Int?
+    /// A sibling `<stem>.ti1` exists next to the parsed file.
+    public var hasSiblingTi1 = false
+
+    public static func parse(
+        _ url: URL,
+        fileManager: FileManager = .default
+    ) -> Ti2Header {
+        var header = Ti2Header()
+        guard let text = try? String(contentsOf: url, encoding: .utf8) else {
+            return header
+        }
+        for rawLine in text.split(whereSeparator: \.isNewline) {
+            let line = rawLine.trimmingCharacters(in: .whitespaces)
+            if line.hasPrefix("BEGIN_DATA_FORMAT") || line.hasPrefix("BEGIN_DATA") {
+                break
+            }
+            // CGATS keyword lines: `KEYWORD "value"` or `KEYWORD value`.
+            guard let space = line.firstIndex(of: " ") else { continue }
+            let key = String(line[..<space])
+            let value = String(line[line.index(after: space)...])
+                .trimmingCharacters(in: .whitespaces)
+                .trimmingCharacters(in: CharacterSet(charactersIn: "\""))
+            switch key {
+            case "TARGET_INSTRUMENT":
+                header.instrument = value
+            case "NUMBER_OF_SETS":
+                header.patchCount = Int(value)
+            case "NUMBER_OF_PAGES":
+                header.pageCount = Int(value)
+            default:
+                continue
+            }
+        }
+        let stem = url.deletingPathExtension()
+        header.hasSiblingTi1 = fileManager.fileExists(
+            atPath: stem.appendingPathExtension("ti1").path
+        )
+        return header
+    }
+}

Packages/ICCeryCore/Sources/ICCeryCore/Files/TiffPreview.swift

@@ -0,0 +1,38 @@
+import Foundation
+import ImageIO
+import UniformTypeIdentifiers
+
+/// TIFF → PNG preview for the Stage 2 gallery (#58): decode on the host
+/// side, cap the long edge at 1200 px, emit PNG. Never hand raw TIFF
+/// bytes to the UI.
+public enum TiffPreview {
+
+    public static let maxEdge: Int = 1200
+
+    /// Returns PNG data for the first page of a TIFF, or `nil` when the
+    /// file cannot be decoded.
+    public static func previewPNG(
+        tiff url: URL,
+        maxEdge: Int = Self.maxEdge
+    ) -> Data? {
+        guard let source = CGImageSourceCreateWithURL(url as CFURL, nil) else {
+            return nil
+        }
+        let options: [CFString: Any] = [
+            kCGImageSourceCreateThumbnailFromImageAlways: true,
+            kCGImageSourceThumbnailMaxPixelSize: maxEdge,
+            kCGImageSourceCreateThumbnailWithTransform: true,
+        ]
+        guard let image = CGImageSourceCreateThumbnailAtIndex(
+            source, 0, options as CFDictionary
+        ) else { return nil }
+
+        let out = NSMutableData()
+        guard let dest = CGImageDestinationCreateWithData(
+            out, UTType.png.identifier as CFString, 1, nil
+        ) else { return nil }
+        CGImageDestinationAddImage(dest, image, nil)
+        guard CGImageDestinationFinalize(dest) else { return nil }
+        return out as Data
+    }
+}

Sources/ICCery/FileDialogService.swift

@@ -1,20 +1,20 @@
 import AppKit
 import UniformTypeIdentifiers
 
-/// NSOpenPanel / NSSavePanel wrappers (issue #6). All CGATS/ICC file
-/// picking in the app goes through this service — the v1 equivalent of
-/// the `select_*` Tauri commands (docs/21 §Dialogs).
+/// Dedicated NSOpenPanel / NSSavePanel wrappers (issue #6) — one method
+/// per purpose, matching the v1 `select_*` commands (docs/21 §Dialogs).
+/// No call site shares a generic picker (#103/#210/#211).
 @MainActor
 final class FileDialogService {
 
     static let shared = FileDialogService()
     private init() {}
 
-    // MARK: - Directory
+    // MARK: - selectDirectory
 
     /// `#btnBrowse` — working directory for Argyll artefacts.
     /// Defaults to Documents (docs/06 §Empty cwd).
-    func chooseDirectory(startingAt start: URL? = nil) -> URL? {
+    func selectDirectory(startingAt start: URL? = nil) -> URL? {
         let panel = NSOpenPanel()
         panel.canChooseDirectories = true
         panel.canChooseFiles = false
@@ -25,69 +25,83 @@ final class FileDialogService {
         return run(panel)
     }
 
-    // MARK: - Open files
+    // MARK: - Dedicated open pickers
 
-    func chooseTI1(startingAt start: URL? = nil) -> URL? {
-        chooseFile(extensions: ["ti1"], startingAt: start)
+    /// `selectTargetFile` — **save** panel for the new `.ti1` target.
+    func selectTargetFile(startingAt start: URL? = nil) -> URL? {
+        let panel = NSSavePanel()
+        panel.nameFieldStringValue = "target.ti1"
+        panel.allowedContentTypes = utTypes(["ti1"])
+        panel.allowsOtherFileTypes = false
+        panel.directoryURL = start
+        panel.message = "Choose the .ti1 target file to create"
+        return run(panel)
     }
 
-    func chooseTI2(startingAt start: URL? = nil) -> URL? {
-        chooseFile(extensions: ["ti2"], startingAt: start)
+    /// `selectExistingTarget` — open `.ti1`/`.ti2` (docs/06 §Resume, #140).
+    func selectExistingTarget(startingAt start: URL? = nil) -> URL? {
+        open(extensions: ["ti1", "ti2"], startingAt: start,
+             message: "Open an existing target (.ti1 or .ti2)")
     }
 
-    /// Stage 1 "Open Existing" — `.ti1` or `.ti2` (docs/06 §Resume).
-    func chooseExistingTarget(startingAt start: URL? = nil) -> URL? {
-        chooseFile(extensions: ["ti1", "ti2"], startingAt: start)
+    /// `selectProfileFile` — `.icc`/`.icm`/`.mpp` only — **never** `.ti*`
+    /// (#172: the profile filter must not accept datasets).
+    func selectProfileFile(startingAt start: URL? = nil) -> URL? {
+        open(extensions: ["icc", "icm", "mpp"], startingAt: start,
+             message: "Choose an ICC/ICM profile or measurement preconditioning file")
     }
 
-    func chooseTI3(startingAt start: URL? = nil) -> URL? {
-        chooseFile(extensions: ["ti3"], startingAt: start)
+    /// `selectSpectrumFile` — `.sp` illuminant spectrum (colprof -i).
+    func selectSpectrumFile(startingAt start: URL? = nil) -> URL? {
+        open(extensions: ["sp"], startingAt: start,
+             message: "Choose a custom illuminant spectrum (.sp)")
     }
 
-    /// ICC/ICM picker (profiles, preconditioning, calibration `.cal`).
-    func chooseProfile(startingAt start: URL? = nil) -> URL? {
-        chooseFile(extensions: ["icc", "icm"], startingAt: start)
+    /// `selectDatasetFile` — open a measured dataset (`.ti3`, `.txt`,
+    /// `.cgats`, `.csv`). Always an *open* dialog, never save (#211).
+    func selectDatasetFile(startingAt start: URL? = nil) -> URL? {
+        open(extensions: ["ti3", "txt", "cgats", "csv"], startingAt: start,
+             message: "Import a measured dataset")
     }
 
-    func chooseCalibration(startingAt start: URL? = nil) -> URL? {
-        chooseFile(extensions: ["cal"], startingAt: start)
+    /// `selectCsvSavePath` — verification-history CSV export.
+    func selectCsvSavePath(startingAt start: URL? = nil) -> URL? {
+        let panel = NSSavePanel()
+        panel.nameFieldStringValue = "verification-history.csv"
+        panel.allowedContentTypes = utTypes(["csv"])
+        panel.allowsOtherFileTypes = false
+        panel.directoryURL = start
+        return run(panel)
     }
 
-    func chooseFile(
+    /// `selectCalFile` — `.cal` calibration curves.
+    func selectCalFile(startingAt start: URL? = nil) -> URL? {
+        open(extensions: ["cal"], startingAt: start,
+             message: "Choose a calibration file (.cal)")
+    }
+
+    // MARK: - Internals (private — not a shared public picker API)
+
+    private func open(
         extensions: [String],
-        startingAt start: URL? = nil,
-        message: String? = nil
+        startingAt start: URL?,
+        message: String?
     ) -> URL? {
         let panel = NSOpenPanel()
         panel.canChooseDirectories = false
         panel.canChooseFiles = true
         panel.allowsMultipleSelection = false
-        panel.allowedContentTypes = extensions.compactMap { UTType(filenameExtension: $0) }
+        panel.allowedContentTypes = utTypes(extensions)
         panel.allowsOtherFileTypes = true
         panel.directoryURL = start
         if let message { panel.message = message }
         return run(panel)
     }
 
-    // MARK: - Save
-
-    func saveFile(
-        defaultName: String,
-        extensions: [String],
-        startingAt start: URL? = nil,
-        message: String? = nil
-    ) -> URL? {
-        let panel = NSSavePanel()
-        panel.nameFieldStringValue = defaultName
-        panel.allowedContentTypes = extensions.compactMap { UTType(filenameExtension: $0) }
-        panel.allowsOtherFileTypes = true
-        panel.directoryURL = start
-        if let message { panel.message = message }
-        return run(panel)
+    private func utTypes(_ extensions: [String]) -> [UTType] {
+        extensions.compactMap { UTType(filenameExtension: $0) }
     }
 
-    // MARK: - Internals
-
     private func run(_ panel: NSOpenPanel) -> URL? {
         panel.runModal() == .OK ? panel.url : nil
     }

Tests/ICCeryCoreTests/ArtefactFilesTests.swift

@@ -0,0 +1,124 @@
+import Testing
+import Foundation
+import ImageIO
+import UniformTypeIdentifiers
+@testable import ICCeryCore
+
+private func tempURL(_ name: String) -> URL {
+    FileManager.default.temporaryDirectory
+        .appendingPathComponent("iccery-af-\(UUID().uuidString)")
+        .appendingPathComponent(name)
+}
+
+@Suite("Ti2Header")
+struct Ti2HeaderTests {
+    @Test func parsesKeywordsAndSibling() throws {
+        let dir = FileManager.default.temporaryDirectory
+            .appendingPathComponent("iccery-ti2-\(UUID().uuidString)")
+        try FileManager.default.createDirectory(at: dir, withIntermediateDirectories: true)
+        try """
+        CTI2
+        TARGET_INSTRUMENT "i1iO"
+        NUMBER_OF_FIELDS 9
+        NUMBER_OF_SETS 800
+        NUMBER_OF_PAGES 3
+        BEGIN_DATA_FORMAT
+        SAMPLE_ID RGB_R
+        END_DATA_FORMAT
+        """.write(to: dir.appendingPathComponent("job.ti2"), atomically: true, encoding: .utf8)
+        try "CGATS".write(
+            to: dir.appendingPathComponent("job.ti1"), atomically: true, encoding: .utf8
+        )
+
+        let h = Ti2Header.parse(dir.appendingPathComponent("job.ti2"))
+        #expect(h.instrument == "i1iO")
+        #expect(h.patchCount == 800)
+        #expect(h.pageCount == 3)
+        #expect(h.hasSiblingTi1)
+    }
+
+    @Test func missingFileYieldsEmptyHeader() {
+        let h = Ti2Header.parse(URL(fileURLWithPath: "/nonexistent/x.ti2"))
+        #expect(h.instrument == nil && h.patchCount == nil && !h.hasSiblingTi1)
+    }
+
+    @Test func numberOfFieldsIsNotPatchCount() throws {
+        let url = tempURL("t.ti2")
+        try FileManager.default.createDirectory(
+            at: url.deletingLastPathComponent(), withIntermediateDirectories: true
+        )
+        try "NUMBER_OF_FIELDS 9\nNUMBER_OF_SETS 52\nBEGIN_DATA\n".write(
+            to: url, atomically: true, encoding: .utf8
+        )
+        #expect(Ti2Header.parse(url).patchCount == 52)
+    }
+}
+
+@Suite("TiffPreview")
+struct TiffPreviewTests {
+    /// Builds a real 2000×1000 TIFF in a temp dir via ImageIO.
+    private func makeTiff(width: Int = 2000, height: Int = 1000) throws -> URL {
+        let url = tempURL("big.tif")
+        try FileManager.default.createDirectory(
+            at: url.deletingLastPathComponent(), withIntermediateDirectories: true
+        )
+        let colorSpace = CGColorSpace(name: CGColorSpace.sRGB)!
+        let ctx = CGContext(
+            data: nil, width: width, height: height,
+            bitsPerComponent: 8, bytesPerRow: width * 4,
+            space: colorSpace,
+            bitmapInfo: CGImageAlphaInfo.premultipliedLast.rawValue
+        )!
+        ctx.setFillColor(CGColor(red: 0.5, green: 0.5, blue: 0.5, alpha: 1))
+        ctx.fill(CGRect(x: 0, y: 0, width: width, height: height))
+        let image = ctx.makeImage()!
+
+        guard let dest = CGImageDestinationCreateWithURL(
+            url as CFURL, UTType.tiff.identifier as CFString, 1, nil
+        ) else { throw CocoaError(.fileWriteUnknown) }
+        CGImageDestinationAddImage(dest, image, nil)
+        guard CGImageDestinationFinalize(dest) else { throw CocoaError(.fileWriteUnknown) }
+        return url
+    }
+
+    @Test func producesCappedPNG() throws {
+        let tiff = try makeTiff()
+        let png = TiffPreview.previewPNG(tiff: tiff)
+        #expect(png != nil)
+        // PNG magic
+        #expect(png!.prefix(8) == Data([0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A]))
+        // Verify the cap by decoding the thumbnail header.
+        let src = CGImageSourceCreateWithData(png! as CFData, nil)!
+        let img = CGImageSourceCreateImageAtIndex(src, 0, nil)!
+        #expect(max(img.width, img.height) <= TiffPreview.maxEdge)
+        #expect(img.width == 1200)
+    }
+
+    @Test func nonTiffReturnsNil() throws {
+        let url = tempURL("not-tiff.txt")
+        try FileManager.default.createDirectory(
+            at: url.deletingLastPathComponent(), withIntermediateDirectories: true
+        )
+        try "hello".write(to: url, atomically: true, encoding: .utf8)
+        #expect(TiffPreview.previewPNG(tiff: url) == nil)
+    }
+}
+
+@Suite("ArtefactFiles")
+struct ArtefactFilesTests {
+    @Test func base64RoundTrip() throws {
+        let url = tempURL("a.txt")
+        try FileManager.default.createDirectory(
+            at: url.deletingLastPathComponent(), withIntermediateDirectories: true
+        )
+        try "hello".write(to: url, atomically: true, encoding: .utf8)
+        let b64 = try ArtefactFiles.readBase64(url)
+        #expect(Data(base64Encoded: b64) == Data("hello".utf8))
+    }
+
+    @Test func defaultWorkingDirExists() {
+        #expect(FileManager.default.fileExists(
+            atPath: ArtefactFiles.defaultWorkingDirectory().path
+        ))
+    }
+}