Fix Photos save for images + add native Quick Look file preview

Photos/Files bug: the lightbox download handed nativeSaveFile a bare "/files/<id>" with no name, extension, or mime. Empty mime made bzSaveToPhotos short-circuit as "notmedia" — so saveToAlbum (and its permission prompt) never ran, and the image landed in the generic Files folder as an extension-less blob. Now nativeSaveFile trusts the server's Content-Type when the mime is unknown and appends a real extension (bzExtForMime/bzEnsureExt), so images reach the Images folder AND Photos. File preview: replace the @capacitor/share "share sheet" open with a new native FileOpener plugin (QLPreviewController). bzOpenFile now prefers a real Quick Look preview and only falls back to the share sheet if the plugin isn't in the build. Wired file-opener into mobile/package.json and the codemagic SPM diagnostics loop. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-08-05 21:38:48 +05:30
parent b2c2acbbc7
commit 2c1e1c7ca5
7 changed files with 175 additions and 6 deletions
@@ -0,0 +1,71 @@
+import Foundation
+import Capacitor
+import QuickLook
+
+// Previews an already-downloaded file with iOS Quick Look — the native "look at this file" surface: swipe,
+// pinch-zoom, print, and its own share button. Registered by cap sync as window.Capacitor.Plugins.FileOpener.
+//
+// WHY A PLUGIN: the app loads its UI from a REMOTE origin (remote.bizgaze.com), so it cannot open a local
+// file:// URL in the WebView (cross-origin / capacitor local-serving isn't on this origin). @capacitor/share
+// only offers the share SHEET ("open in another app"), not a preview. Only QLPreviewController, presented
+// from native code, gives a real in-app preview. Quick Look picks the renderer from the file extension, which
+// is why the web layer now saves downloads with a correct extension (see bzEnsureExt in home.html).
+@objc(FileOpenerPlugin)
+public class FileOpenerPlugin: CAPPlugin, CAPBridgedPlugin {
+    public let identifier = "FileOpenerPlugin"
+    public let jsName = "FileOpener"
+    public let pluginMethods: [CAPPluginMethod] = [
+        CAPPluginMethod(name: "preview", returnType: CAPPluginReturnPromise)
+    ]
+
+    // QLPreviewController holds its dataSource weakly, so we must keep a strong reference alive for the
+    // lifetime of the presented preview — otherwise it deallocates and the preview shows blank.
+    private var dataSource: QLDataSource?
+
+    @objc func preview(_ call: CAPPluginCall) {
+        guard let raw = call.getString("path"), !raw.isEmpty else {
+            call.reject("path is required"); return
+        }
+        let url = FileOpenerPlugin.fileURL(from: raw)
+        guard FileManager.default.fileExists(atPath: url.path) else {
+            call.reject("file not found: \(url.path)"); return
+        }
+        DispatchQueue.main.async {
+            let ds = QLDataSource(url: url)
+            self.dataSource = ds
+            let controller = QLPreviewController()
+            controller.dataSource = ds
+            controller.modalPresentationStyle = .fullScreen
+            guard let base = self.bridge?.viewController else {
+                call.reject("no view controller to present from"); return
+            }
+            // Present on top of whatever is already showing (a modal, another sheet) so it never fails silently.
+            var presenter = base
+            while let top = presenter.presentedViewController { presenter = top }
+            presenter.present(controller, animated: true) {
+                call.resolve(["ok": true])
+            }
+        }
+    }
+
+    // Accepts either a file:// URI (what Filesystem.writeFile returns) or a bare absolute path.
+    private static func fileURL(from raw: String) -> URL {
+        if raw.hasPrefix("file://") {
+            if let u = URL(string: raw) { return u }
+            // Un-encoded spaces make URL(string:) fail — percent-encode and retry before giving up.
+            let encoded = raw.addingPercentEncoding(withAllowedCharacters: .urlPathAllowed) ?? raw
+            if let u = URL(string: encoded) { return u }
+        }
+        return URL(fileURLWithPath: raw)
+    }
+}
+
+// Single-item data source. NSURL already conforms to QLPreviewItem.
+final class QLDataSource: NSObject, QLPreviewControllerDataSource {
+    private let url: URL
+    init(url: URL) { self.url = url }
+    func numberOfPreviewItems(in controller: QLPreviewController) -> Int { 1 }
+    func previewController(_ controller: QLPreviewController, previewItemAt index: Int) -> QLPreviewItem {
+        return url as NSURL
+    }
+}