Logging: Allow logging structured fields

Display this in the Debug Screen app. Additionally, add a reason why a
file was not loaded.

lib/core/notes_folder_fs.dart

@@ -186,12 +186,15 @@ class NotesFolderFS with NotesFolderNotifier implements NotesFolder {
       }
 
       if (fsEntity is Directory) {
-        Log.v("Found directory ${fsEntity.path}");
         var subFolder = NotesFolderFS(this, fsEntity.path);
         if (subFolder.name.startsWith('.')) {
+          Log.v("Ignoring Folder", props: {
+            "path": fsEntity.path,
+            "reason": "Hidden folder",
+          });
           continue;
         }
-        Log.v("Found folder ${fsEntity.path}");
+        Log.v("Found Folder", props: {"path": fsEntity.path});
         _addFolderListeners(subFolder);
 
         _folders.add(subFolder);
@@ -203,11 +206,21 @@ class NotesFolderFS with NotesFolderNotifier implements NotesFolder {
       }
 
       var note = Note(this, fsEntity.path);
-      if (!note.filePath.toLowerCase().endsWith('.md')) {
-        Log.v("Ignoring file ${fsEntity.path}");
+      if (note.fileName.startsWith('.')) {
+        Log.v("Ignoring file", props: {
+          "path": fsEntity.path,
+          "reason": "Starts with a .",
+        });
         continue;
       }
-      Log.v("Found file ${fsEntity.path}");
+      if (!note.filePath.toLowerCase().endsWith('.md')) {
+        Log.v("Ignoring file", props: {
+          "path": fsEntity.path,
+          "reason": "Doesn't end with a .md",
+        });
+        continue;
+      }
+      Log.v("Found file", props: {"path": fsEntity.path});
       _addNoteListeners(note);
 
       _notes.add(note);

lib/screens/debug_screen.dart

@@ -79,12 +79,33 @@ class _DebugScreenState extends State<DebugScreen> {
     if (msg.stack != null) {
       str += ' ' + msg.stack;
     }
+
+    var props = <TextSpan>[];
+    msg.props?.forEach((key, value) {
+      var emptySpace = TextSpan(
+          text: '\n             ',
+          style: textStyle.copyWith(fontWeight: FontWeight.bold));
+      props.add(emptySpace);
+
+      var keySpan = TextSpan(
+        text: '$key: ',
+        style: textStyle.copyWith(
+          fontWeight: FontWeight.bold,
+        ),
+      );
+      var valueSpan = TextSpan(text: value.toString());
+
+      props.add(keySpan);
+      props.add(valueSpan);
+    });
+
     return RichText(
       text: TextSpan(children: [
         TextSpan(
             text: timeStr,
             style: textStyle.copyWith(fontWeight: FontWeight.bold)),
         TextSpan(text: str),
+        ...props,
       ], style: textStyle),
     );
   }

lib/utils/logger.dart

@@ -29,29 +29,34 @@ class Log {
     await setLogCapture(true);
   }
 
-  static void v(String msg, {dynamic ex, StackTrace stacktrace}) {
+  static void v(String msg,
+      {dynamic ex, StackTrace stacktrace, Map<String, dynamic> props}) {
     Fimber.v(msg, ex: ex, stacktrace: stacktrace);
-    _write('v', msg, ex, stacktrace);
+    _write('v', msg, ex, stacktrace, props);
   }
 
-  static void d(String msg, {dynamic ex, StackTrace stacktrace}) {
+  static void d(String msg,
+      {dynamic ex, StackTrace stacktrace, Map<String, dynamic> props}) {
     Fimber.d(msg, ex: ex, stacktrace: stacktrace);
-    _write('d', msg, ex, stacktrace);
+    _write('d', msg, ex, stacktrace, props);
   }
 
-  static void i(String msg, {dynamic ex, StackTrace stacktrace}) {
+  static void i(String msg,
+      {dynamic ex, StackTrace stacktrace, Map<String, dynamic> props}) {
     Fimber.i(msg, ex: ex, stacktrace: stacktrace);
-    _write('i', msg, ex, stacktrace);
+    _write('i', msg, ex, stacktrace, props);
   }
 
-  static void e(String msg, {dynamic ex, StackTrace stacktrace}) {
+  static void e(String msg,
+      {dynamic ex, StackTrace stacktrace, Map<String, dynamic> props}) {
     Fimber.e(msg, ex: ex, stacktrace: stacktrace);
-    _write('e', msg, ex, stacktrace);
+    _write('e', msg, ex, stacktrace, props);
   }
 
-  static void w(String msg, {dynamic ex, StackTrace stacktrace}) {
+  static void w(String msg,
+      {dynamic ex, StackTrace stacktrace, Map<String, dynamic> props}) {
     Fimber.w(msg, ex: ex, stacktrace: stacktrace);
-    _write('w', msg, ex, stacktrace);
+    _write('w', msg, ex, stacktrace, props);
   }
 
   static void _write(
@@ -59,6 +64,7 @@ class Log {
     String msg,
     dynamic ex,
     StackTrace stackTrace,
+    Map<String, dynamic> props,
   ) {
     if (logFile == null) {
       return;
@@ -72,6 +78,7 @@ class Log {
       stack: stackTrace != null
           ? stackTrace.toString().replaceAll('\n', ' ')
           : null,
+      props: props,
     );
 
     var str = json.encode(logMsg.toMap());
@@ -118,6 +125,7 @@ class LogMessage {
   String msg;
   String ex;
   String stack;
+  Map<String, dynamic> props;
 
   LogMessage({
     @required this.t,
@@ -125,6 +133,7 @@ class LogMessage {
     @required this.msg,
     this.ex,
     this.stack,
+    this.props,
   });
 
   Map<String, dynamic> toMap() {
@@ -134,6 +143,7 @@ class LogMessage {
       'msg': msg,
       if (ex != null && ex.isNotEmpty) 'ex': ex,
       if (stack != null && stack.isNotEmpty) 'stack': stack,
+      if (props != null && props.isNotEmpty) 'p': props,
     };
   }
 
@@ -143,5 +153,6 @@ class LogMessage {
     msg = map['msg'];
     ex = map['ex'];
     stack = map['stack'];
+    props = map['p'];
   }
 }