Implement new PDF viewer

lib/utils/pdf.dart

@@ -1,73 +1,47 @@
 import 'dart:async';
+import 'dart:io';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:invoiceninja_flutter/data/models/invoice_model.dart';
-import 'package:invoiceninja_flutter/utils/localization.dart';
-import 'package:url_launcher/url_launcher.dart';
-//import 'package:flutter_plugin_pdf_viewer/flutter_plugin_pdf_viewer.dart';
+import 'package:invoiceninja_flutter/ui/app/loading_indicator.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:flutter_pdfview/flutter_pdfview.dart';
 
 Future<Null> viewPdf(InvoiceEntity invoice, BuildContext context) async {
-  /*
-  final navigator = Navigator.of(context);
-  navigator.push(
-      MaterialPageRoute<PDFViewer>(builder: (context) => PDFScreen(invoice)));
-  */
 
-  final localization = AppLocalization.of(context);
-  if (Theme.of(context).platform == TargetPlatform.iOS) {
-    if (await canLaunch(invoice.invitationBorderlessLink)) {
-      await launch(invoice.invitationBorderlessLink,
-          forceSafariVC: true, forceWebView: true);
-    } else {
-      throw localization.anErrorOccurred;
-    }
-  } else {
-    final String url =
-        'https://docs.google.com/viewer?url=' + invoice.invitationDownloadLink;
-    if (await canLaunch(url)) {
-      await launch(url, forceSafariVC: false, forceWebView: false);
-    } else {
-      throw localization.anErrorOccurred;
-    }
-  }
+  showDialog<Scaffold>(
+      context: context,
+      builder: (BuildContext context) {
+        return Scaffold(
+          appBar: AppBar(),
+          body: FutureBuilder(
+              future: createFileOfPdfUrl(invoice.invitationDownloadLink),
+              builder: (BuildContext context, AsyncSnapshot<File> snapshot) {
+                switch (snapshot.connectionState) {
+                  case ConnectionState.none:
+                  case ConnectionState.active:
+                  case ConnectionState.waiting:
+                    return LoadingIndicator();
+                  case ConnectionState.done:
+                    if (snapshot.hasError)
+                      return Text('Error: ${snapshot.error}');
+                    else
+                      return PDFView(filePath: snapshot.data.path);
+                }
+                return null; // unreachable
+              }),
+        );
+      });
+
 }
 
-/*
-class PDFScreen extends StatefulWidget {
-  const PDFScreen(this.invoice);
-
-  final InvoiceEntity invoice;
-
-  @override
-  _PDFScreenState createState() => _PDFScreenState();
+Future<File> createFileOfPdfUrl(String url) async {
+  final filename = url.substring(url.lastIndexOf('/') + 1);
+  final request = await HttpClient().getUrl(Uri.parse(url));
+  final response = await request.close();
+  final bytes = await consolidateHttpClientResponseBytes(response);
+  final dir = (await getApplicationDocumentsDirectory()).path;
+  final file = new File('$dir/$filename');
+  await file.writeAsBytes(bytes);
+  return file;
 }
-
-class _PDFScreenState extends State<PDFScreen> {
-  PDFDocument document;
-
-  @override
-  void initState() {
-    super.initState();
-
-    PDFDocument.fromURL(widget.invoice.invitationDownloadLink).then((doc) {
-      setState(() => document = doc);
-    });
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      appBar: AppBar(
-        title: Text('${widget.invoice.invoiceNumber}'),
-      ),
-      body: Center(
-        child: document == null
-            ? CircularProgressIndicator()
-            : PDFViewer(
-                showPicker: false,
-                document: document,
-              ),
-      ),
-    );
-  }
-}
-*/

pubspec.lock

@@ -226,6 +226,13 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_pdfview:
+    dependency: "direct main"
+    description:
+      name: flutter_pdfview
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.0+7"
   flutter_redux:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -30,11 +30,8 @@ dependencies:
   local_auth: ^0.3.0
   sentry: ^2.2.0
   image_picker: ^0.6.0+17
-  #flutter_plugin_pdf_viewer: any
+  flutter_pdfview: ^1.0.0+7
   #quick_actions: ^0.2.1
-  #flutter_html_view: ^0.5.8
-  #flutter_html: ^0.5.3
-  #flutter_native_web: ^0.1.2
 
 dev_dependencies:
   flutter_driver: