feat-insert-service (#5)

Reviewed-on: http://catelliub.zapto.org:3000/brontomark/flux/pulls/5
Co-authored-by: mark-cachy <marco@catelli.it>
Co-committed-by: mark-cachy <marco@catelli.it>

lib/core/widgets/image_viewer_widget.dart

@@ -0,0 +1,61 @@
+import 'dart:typed_data';
+import 'package:flutter/material.dart';
+import 'package:supabase_flutter/supabase_flutter.dart'; // <--- AGGIUNGI QUESTO
+
+class ImageViewerWidget extends StatelessWidget {
+  final String? storagePath; // ATTENZIONE: Ora contiene lo storagePath!
+  final Uint8List? bytes;
+
+  const ImageViewerWidget({super.key, this.storagePath, this.bytes})
+    : assert(
+        (storagePath != null && storagePath != '') || bytes != null,
+        'Errore: Devi fornire un Path valido o i bytes del file!',
+      );
+
+  // Funzione che chiede le chiavi a Supabase
+  Future<String> _getSignedUrl() async {
+    return await Supabase.instance.client.storage
+        .from('documents')
+        .createSignedUrl(storagePath!, 60); // Link che si autodistrugge in 60s
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        backgroundColor: Colors.transparent,
+        elevation: 0,
+        leading: IconButton(
+          icon: const Icon(Icons.close, color: Colors.black),
+          onPressed: () => Navigator.pop(context),
+        ),
+      ),
+      body: InteractiveViewer(
+        maxScale: 5.0,
+        child: Center(
+          // Se abbiamo i byte, mostriamo subito. Altrimenti usiamo il FutureBuilder!
+          child: bytes != null
+              ? Image.memory(bytes!)
+              : FutureBuilder<String>(
+                  future: _getSignedUrl(),
+                  builder: (context, snapshot) {
+                    if (snapshot.connectionState == ConnectionState.waiting) {
+                      return const CircularProgressIndicator();
+                    }
+                    if (snapshot.hasError) {
+                      return const Text(
+                        "Errore caricamento immagine (Permessi negati?)",
+                        style: TextStyle(color: Colors.red),
+                      );
+                    }
+                    if (snapshot.hasData) {
+                      return Image.network(snapshot.data!);
+                    }
+                    return const SizedBox.shrink();
+                  },
+                ),
+        ),
+      ),
+    );
+  }
+}

lib/core/widgets/pdf_viewer_widget.dart

@@ -0,0 +1,97 @@
+import 'dart:typed_data';
+import 'package:flutter/material.dart';
+import 'package:get_it/get_it.dart';
+import 'package:pdfx/pdfx.dart';
+import 'package:internet_file/internet_file.dart';
+import 'package:supabase_flutter/supabase_flutter.dart';
+
+class PdfViewerWidget extends StatefulWidget {
+  final String? storagePath;
+  final Uint8List? bytes;
+
+  const PdfViewerWidget({super.key, this.storagePath, this.bytes})
+    : assert(
+        (storagePath != null && storagePath != '') || bytes != null,
+        'Errore: Devi fornire un URL valido o i bytes del file!',
+      );
+
+  @override
+  State<PdfViewerWidget> createState() => _PdfViewerWidgetState();
+}
+
+class _PdfViewerWidgetState extends State<PdfViewerWidget> {
+  late PdfControllerPinch _pdfController;
+  bool _isLoading = true;
+  String? _errorMessage;
+
+  @override
+  void initState() {
+    super.initState();
+    _initPdf();
+  }
+
+  Future<void> _initPdf() async {
+    try {
+      Uint8List pdfData;
+
+      if (widget.bytes != null) {
+        // SCENARIO 1: Pratica in bozza, file appena scelto (Locale)
+        pdfData = widget.bytes!;
+      } else if (widget.storagePath != null && widget.storagePath!.isNotEmpty) {
+        // SCENARIO 2: Pratica salvata, scarichiamo da Supabase (Remoto)
+        final signedUrl = await GetIt.I
+            .get<SupabaseClient>()
+            .storage
+            .from('documents')
+            .createSignedUrl(widget.storagePath!, 60);
+        pdfData = await InternetFile.get(signedUrl);
+      } else {
+        throw Exception("Nessun documento trovato");
+      }
+
+      _pdfController = PdfControllerPinch(
+        document: PdfDocument.openData(pdfData),
+      );
+
+      if (mounted) setState(() => _isLoading = false);
+    } catch (e) {
+      if (mounted) {
+        setState(() {
+          _isLoading = false;
+          _errorMessage = e.toString();
+        });
+      }
+    }
+  }
+
+  @override
+  void dispose() {
+    _pdfController.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    if (_isLoading) {
+      return const Scaffold(body: Center(child: CircularProgressIndicator()));
+    }
+
+    if (_errorMessage != null) {
+      return Scaffold(
+        appBar: AppBar(leading: const CloseButton()),
+        body: Center(child: Text("Errore: $_errorMessage")),
+      );
+    }
+
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text("Anteprima PDF"),
+        leading: IconButton(
+          icon: const Icon(Icons.close),
+          onPressed: () => Navigator.pop(context),
+        ),
+      ),
+      body: PdfViewPinch(controller: _pdfController),
+    );
+  }
+}