Create new note when clicking on non existing Wiki Link

Fixes #240

assets/langs/en.yaml

@@ -269,6 +269,7 @@ widgets:
     failed: Purchase Failed
   NoteViewer:
     linkNotFound: Link '{}' not found
+    linkInvalid: Link '{}' is invalid.
   FolderSelectionDialog:
     title: Select a Folder
 

changelog.yml

@@ -9,6 +9,7 @@
     - text: "Add Shortcuts support in iOS - #262"
       image: ios_shortcuts.png
     - text: "Custom SSH keys with passwords can now be used - #227"
+    - text: "Create new note when clicking on non existing Wiki Link - #240"
   bugs:
     - text: "Fix notes not always showing up - #270"
 

lib/core/note.dart

@@ -104,7 +104,11 @@ class Note with NotesNotifier {
     noteSerializer = NoteSerializer.fromConfig(parent.config);
   }
 
-  Note.newNote(this.parent, {Map<String, dynamic> extraProps = const {}}) {
+  Note.newNote(
+    this.parent, {
+    Map<String, dynamic> extraProps = const {},
+    String fileName = "",
+  }) {
     created = DateTime.now();
     _loadState = NoteLoadState.Loaded;
     _fileFormat = NoteFileFormat.Markdown;
@@ -116,6 +120,17 @@ class Note with NotesNotifier {
       });
       noteSerializer.decode(_data, this);
     }
+
+    if (fileName.isNotEmpty) {
+      // FIXME: We should ensure a note with this fileName does not already
+      //        exist
+      if (!NoteFileFormatInfo.isAllowedFileName(fileName)) {
+        fileName +=
+            NoteFileFormatInfo.defaultExtension(NoteFileFormat.Markdown);
+      }
+      _filePath = p.join(parent.folderPath, fileName);
+      Log.i("Constructing new note with path $_filePath");
+    }
   }
 
   String get filePath {

lib/folder_views/common.dart

@@ -1,13 +1,16 @@
 import 'package:flutter/material.dart';
 
+import 'package:path/path.dart' as p;
 import 'package:provider/provider.dart';
 
 import 'package:gitjournal/core/note.dart';
 import 'package:gitjournal/core/notes_folder.dart';
+import 'package:gitjournal/core/notes_folder_fs.dart';
 import 'package:gitjournal/folder_views/card_view.dart';
 import 'package:gitjournal/folder_views/grid_view.dart';
 import 'package:gitjournal/folder_views/journal_view.dart';
 import 'package:gitjournal/screens/note_editor.dart';
+import 'package:gitjournal/settings.dart';
 import 'package:gitjournal/state_container.dart';
 import 'package:gitjournal/utils.dart';
 import 'package:gitjournal/utils/logger.dart';
@@ -83,7 +86,8 @@ void openNoteEditor(
   bool editMode = false,
 }) async {
   var route = MaterialPageRoute(
-    builder: (context) => NoteEditor.fromNote(note, parentFolder, editMode: editMode),
+    builder: (context) =>
+        NoteEditor.fromNote(note, parentFolder, editMode: editMode),
     settings: const RouteSettings(name: '/note/'),
   );
   var showUndoSnackBar = await Navigator.of(context).push(route);
@@ -97,3 +101,33 @@ void openNoteEditor(
       ..showSnackBar(snackBar);
   }
 }
+
+bool openNewNoteEditor(BuildContext context, String term) {
+  var rootFolder = Provider.of<NotesFolderFS>(context, listen: false);
+  var parentFolder = rootFolder;
+  var settings = Provider.of<Settings>(context, listen: false);
+  var defaultEditor = settings.defaultEditor.toEditorType();
+
+  var fileName = term;
+  if (fileName.contains(p.separator)) {
+    parentFolder = rootFolder.getFolderWithSpec(p.dirname(fileName));
+    if (parentFolder == null) {
+      return false;
+    }
+    Log.i("New Note Parent Folder: ${parentFolder.folderPath}");
+
+    fileName = p.basename(term);
+  }
+
+  var route = MaterialPageRoute(
+    builder: (context) => NoteEditor.newNote(
+      parentFolder,
+      parentFolder,
+      defaultEditor,
+      newNoteFileName: fileName,
+    ),
+    settings: const RouteSettings(name: '/newNote/'),
+  );
+  Navigator.of(context).push(route);
+  return true;
+}

lib/screens/note_editor.dart

@@ -37,6 +37,7 @@ class NoteEditor extends StatefulWidget {
   final List<String> existingImages;
 
   final Map<String, dynamic> newNoteExtraProps;
+  final String newNoteFileName;
   final bool editMode;
 
   NoteEditor.fromNote(
@@ -47,6 +48,7 @@ class NoteEditor extends StatefulWidget {
         defaultEditorType = null,
         existingText = null,
         existingImages = null,
+        newNoteFileName = "",
         newNoteExtraProps = null;
 
   NoteEditor.newNote(
@@ -56,6 +58,7 @@ class NoteEditor extends StatefulWidget {
     this.existingText,
     this.existingImages,
     this.newNoteExtraProps = const {},
+    this.newNoteFileName = "",
   })  : note = null,
         editMode = true;
 
@@ -67,6 +70,7 @@ class NoteEditor extends StatefulWidget {
         existingText,
         existingImages,
         newNoteExtraProps,
+        newNoteFileName,
       );
     } else {
       return NoteEditorState.fromNote(note);
@@ -95,8 +99,9 @@ class NoteEditorState extends State<NoteEditor> with WidgetsBindingObserver {
     String existingText,
     List<String> existingImages,
     Map<String, dynamic> extraProps,
+    String fileName,
   ) {
-    note = Note.newNote(folder, extraProps: extraProps);
+    note = Note.newNote(folder, extraProps: extraProps, fileName: fileName);
     if (existingText != null) {
       note.body = existingText;
     }

lib/utils/link_resolver.dart

@@ -22,15 +22,22 @@ class LinkResolver {
   }
 
   Note resolve(String link) {
-    if (link.startsWith('[[') && link.endsWith(']]') && link.length > 4) {
+    if (isWikiLink(link)) {
       // FIXME: What if the case is different?
-      var wikiLinkTerm = link.substring(2, link.length - 2).trim();
-      return resolveWikiLink(wikiLinkTerm);
+      return resolveWikiLink(stripWikiSyntax(link));
     }
 
     return _getNoteWithSpec(inputNote.parent, link);
   }
 
+  static bool isWikiLink(String link) {
+    return link.startsWith('[[') && link.endsWith(']]') && link.length > 4;
+  }
+
+  static String stripWikiSyntax(String link) {
+    return link.substring(2, link.length - 2).trim();
+  }
+
   Note resolveWikiLink(String term) {
     if (term.contains(p.separator)) {
       var spec = p.normalize(term);

lib/widgets/note_viewer.dart

@@ -89,6 +89,18 @@ class NoteViewer extends StatelessWidget {
                   return;
                 }
 
+                if (LinkResolver.isWikiLink(link)) {
+                  var opened = openNewNoteEditor(
+                      context, LinkResolver.stripWikiSyntax(link));
+                  if (!opened) {
+                    showSnackbar(
+                      context,
+                      tr('wigets.NoteViewer.linkInvalid', args: [link]),
+                    );
+                  }
+                  return;
+                }
+
                 // External Link
                 try {
                   await launch(link);