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todotxt_reminder
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parsing of todo, retaining state over multiple sessions.

This commit is contained in:
Nicole Dresselhaus 2023-01-09 17:27:04 +01:00
parent 60edaddc03
commit 61d444bd41
10 changed files with 295 additions and 12 deletions
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2
.gitignore vendored
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@ -41,4 +41,4 @@ app.*.map.json
# Android Studio will place build artifacts here
/android/app/debug
/android/app/profile
/android/app/release
/android/app/release

3
lib/addReminder.dart
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@ -1,5 +1,6 @@
import 'package:flutter/material.dart';
import 'package:nextcloud_reminder/repeating_task.dart';
import 'package:nextcloud_reminder/types/tasks.dart';
class AddTaskWidget extends StatefulWidget {
const AddTaskWidget({super.key, this.restorationId, required this.onSave});
@ -123,7 +124,7 @@ class _AddTaskWidgetState extends State<AddTaskWidget> with RestorationMixin {
const SnackBar(content: Text('Task added.')),
);
widget.onSave(RepeatingTask(
title: _titleController.text, begin: _beginDate.value, repeat: _repeat,));
task: Task(title: _titleController.text, begin: _beginDate.value), repeat: _repeat,));
Navigator.pop(context);
}
},

61
lib/homescreen.dart
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@ -1,7 +1,12 @@
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:nextcloud_reminder/addReminder.dart';
import 'package:nextcloud_reminder/parser/todotxt.dart';
import 'package:nextcloud_reminder/repeating_task.dart';
import 'package:nextcloud_reminder/table.dart';
import 'package:nextcloud_reminder/types/tasks.dart';
import 'package:path_provider/path_provider.dart';
class HomeWidget extends StatefulWidget {
const HomeWidget({super.key, required this.title});
@ -21,9 +26,60 @@ class HomeWidget extends StatefulWidget {
State<HomeWidget> createState() => _HomeWidgetState();
}
class _HomeWidgetState extends State<HomeWidget> {
class _HomeWidgetState extends State<HomeWidget> with WidgetsBindingObserver {
final ScrollTable _checkboxes = ScrollTable(title: "TODOs");
int _counter = 1;
late final Directory appDocDirectory;
late final File todotxt = File('${appDocDirectory.path}/todo.txt');
final List<Task> tasks = [];
void _loadTodos() {
for (var element in tasks) {
debugPrint("loaded: ${element.toString()}");
_checkboxes.addTask(RepeatingTask(task: element));
}
}
void initLazy() async {
appDocDirectory = (await getApplicationDocumentsDirectory());
if (await todotxt.exists()) {
var data = await todotxt.readAsLines();
debugPrint(data.toString());
tasks.addAll(TodoParser.parse(data));
_loadTodos();
} else {
debugPrint("no todo file found at ${todotxt.path}");
}
}
@override
void initState() {
super.initState();
WidgetsBinding.instance.addObserver(this);
initLazy();
}
@override
void dispose() {
WidgetsBinding.instance.removeObserver(this);
super.dispose();
}
@override
void didChangeAppLifecycleState(AppLifecycleState state) {
if (state == AppLifecycleState.paused || state == AppLifecycleState.inactive) {
// App is in the background, save any unsaved data
debugPrint("save to disk");
saveData();
}
}
void saveData() async {
//TODO: better update lines instead of blindly overwriting.
String data = tasks.map((t) => t.toString()).join("\n");
debugPrint("Saving:\n$data");
await todotxt.writeAsString(data);
}
void _addDummyTask() {
setState(() {
@ -32,13 +88,14 @@ class _HomeWidgetState extends State<HomeWidget> {
// so that the display can reflect the updated values. If we changed
// stuff without calling setState(), then the build method would not be
// called again, and so nothing would appear to happen.
_checkboxes.addTask(RepeatingTask(title: "Dummy Task #$_counter", begin: DateTime.now(), repeat: _counter++));
_checkboxes.addTask(RepeatingTask(task: Task(title: "Dummy Task #$_counter", begin: DateTime.now()), repeat: _counter++));
});
}
void _addTask(RepeatingTask? t) {
if (t != null) {
setState(() {
_checkboxes.addTask(t!);
tasks.add(t.task);
});
}
}

79
lib/parser/todotxt.dart Normal file
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@ -0,0 +1,79 @@
import 'package:flutter/material.dart';
import 'package:petitparser/petitparser.dart';
import 'package:nextcloud_reminder/types/tasks.dart';
import 'package:tuple/tuple.dart';
abstract class TodoParser {
static final _definition = TodoTxtEvaluatorDefinition();
static final _todoParser = _definition.build();
static List<Task> parse(List<String> input) {
final List<Task> ret = [];
for (var element in input) {
var parsed = _todoParser.parse(element);
if (parsed.isSuccess) {
ret.add(parsed.value);
} else {
debugPrint(parsed.message);
debugPrint(element);
}
}
return ret;
}
}
class TodoTxtEvaluatorDefinition extends TodoTxtDefinition {
@override
Parser todoLine() => super.todoLine().map((value) =>
//parser gives the following structure:
//0: completed? (null | true)
//1: priority? (null | uppercase letter)
//2: range? (null | [begin-date, (null | end-date)]
//3: description: Tuple5<original text, list<projects>, list<contexts>, map<meta>, text without meta>
Task( title: value[3].item5,
done: value[0] ?? false,
priority: value[1],
begin: (value[2] == null ? null : value[2][0]),
end: (value[2] == null ? null : value[2][1]),
projects: value[3].item2,
contexts: value[3].item3,
meta: value[3].item4,
)
);
}
class TodoTxtDefinition extends GrammarDefinition {
Tuple5<String,List<String>,List<String>, Map<String,String>, String> _extract_project_and_context(String input) {
final projectPattern = RegExp(r'\+([^ ]+)');
final contextPattern = RegExp(r'@([^ ]+)');
final metaPattern = RegExp(r'([^ ]+):([^ ]+)');
var projects = projectPattern.allMatches(input).map((Match m) => m[1]!);
var contexts = contextPattern.allMatches(input).map((Match m) => m[1]!);
var meta = metaPattern.allMatches(input).map((Match m) => MapEntry(m[1]!, m[2]!));
var cleanInput = input//.replaceAll(projectPattern, '')
//.replaceAll(contextPattern, '')
.replaceAll(metaPattern, '');
return Tuple5(input, List.of(projects), List.of(contexts), Map.fromEntries(meta), cleanInput.trim());
}
@override
Parser start() => ref0(todoLine).end();
Parser todoLine() => ref0(completed).trim().optional()
& ref0(priority).trim().optional()
& (ref0(date).trim() & ref0(date).trim().optional()).optional() // completion date + optional creation date
& any().plus().flatten().map(_extract_project_and_context)
;
Parser completed() => char('x').map((_) => true);
Parser priority() => (char('(') & pattern('A-Z') & char(')')).map((values) => values[1]);
Parser date() => (digit().plus().flatten() & char('-') & digit().plus().flatten() & char('-') & digit().plus().flatten())
.map((values) => DateTime(int.parse(values[0]),int.parse(values[2]),int.parse(values[4])));
}

10
lib/repeating_task.dart
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@ -1,11 +1,11 @@
import 'package:flutter/material.dart';
import 'package:nextcloud_reminder/task_item.dart';
import 'package:nextcloud_reminder/types/tasks.dart';
class RepeatingTask extends StatefulWidget {
const RepeatingTask({super.key, required this.title, required this.begin, this.repeat=1});
const RepeatingTask({super.key, required this.task, this.repeat=1});
final String title;
final DateTime begin;
final Task task;
final int repeat;
@override
@ -14,14 +14,10 @@ class RepeatingTask extends StatefulWidget {
class _RepeatingTaskState extends State<RepeatingTask> {
late List<TaskItem> _occurrences;
late DateTime _first_occurence;
late String _title;
@override
void initState() {
super.initState();
_title = widget.title;
_first_occurence = widget.begin;
_occurrences = List<TaskItem>.generate(10, (index) => TaskItem(done: index % widget.repeat == 0 ? false : null));
}

2
lib/table.dart
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@ -39,7 +39,7 @@ class _ScrollTableState extends State<ScrollTable> {
height: 60.0,
color: Colors.white,
margin: const EdgeInsets.all(4.0),
child: Text(t.title, style: Theme
child: Text(t.task.title, style: Theme
.of(context)
.textTheme
.labelMedium),

32
lib/types/tasks.dart Normal file
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@ -0,0 +1,32 @@
class Task {
final bool done;
final DateTime? begin;
final DateTime? end;
final String title;
final List<String> contexts;
final List<String> projects;
final Map<String,String> meta;
final String? priority;
Task({
required this.title,
this.done = false,
this.contexts = const [],
this.projects = const [],
this.meta = const {},
this.priority,
this.begin,
this.end,
});
@override
String toString() {
return (done ? "x " : "")
+ (priority == null ? "" : "(${priority!}) ")
+ (begin == null ? "" : "${begin!.year}-${begin!.month}-${begin!.day} ")
+ (end == null ? "" : "${end!.year}-${end!.month}-${end!.day} ")
+ ("$title ")
+ meta.entries.map((entry) => "${entry.key}:${entry.value}").join(" ")
;
}
}

2
macos/Flutter/GeneratedPluginRegistrant.swift
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@ -5,6 +5,8 @@
import FlutterMacOS
import Foundation
import path_provider_macos
func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
PathProviderPlugin.register(with: registry.registrar(forPlugin: "PathProviderPlugin"))
}

113
pubspec.lock
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@ -50,6 +50,20 @@ packages:
url: "https://pub.dartlang.org"
source: hosted
version: "1.3.1"
ffi:
dependency: transitive
description:
name: ffi
url: "https://pub.dartlang.org"
source: hosted
version: "2.0.1"
file:
dependency: transitive
description:
name: file
url: "https://pub.dartlang.org"
source: hosted
version: "6.1.4"
flutter:
dependency: "direct main"
description: flutter
@ -102,6 +116,83 @@ packages:
url: "https://pub.dartlang.org"
source: hosted
version: "1.8.2"
path_provider:
dependency: "direct main"
description:
name: path_provider
url: "https://pub.dartlang.org"
source: hosted
version: "2.0.11"
path_provider_android:
dependency: transitive
description:
name: path_provider_android
url: "https://pub.dartlang.org"
source: hosted
version: "2.0.22"
path_provider_ios:
dependency: transitive
description:
name: path_provider_ios
url: "https://pub.dartlang.org"
source: hosted
version: "2.0.11"
path_provider_linux:
dependency: transitive
description:
name: path_provider_linux
url: "https://pub.dartlang.org"
source: hosted
version: "2.1.7"
path_provider_macos:
dependency: transitive
description:
name: path_provider_macos
url: "https://pub.dartlang.org"
source: hosted
version: "2.0.6"
path_provider_platform_interface:
dependency: transitive
description:
name: path_provider_platform_interface
url: "https://pub.dartlang.org"
source: hosted
version: "2.0.5"
path_provider_windows:
dependency: transitive
description:
name: path_provider_windows
url: "https://pub.dartlang.org"
source: hosted
version: "2.1.3"
petitparser:
dependency: "direct main"
description:
name: petitparser
url: "https://pub.dartlang.org"
source: hosted
version: "5.1.0"
platform:
dependency: transitive
description:
name: platform
url: "https://pub.dartlang.org"
source: hosted
version: "3.1.0"
plugin_platform_interface:
dependency: transitive
description:
name: plugin_platform_interface
url: "https://pub.dartlang.org"
source: hosted
version: "2.1.3"
process:
dependency: transitive
description:
name: process
url: "https://pub.dartlang.org"
source: hosted
version: "4.2.4"
sky_engine:
dependency: transitive
description: flutter
@ -149,6 +240,13 @@ packages:
url: "https://pub.dartlang.org"
source: hosted
version: "0.4.12"
tuple:
dependency: "direct main"
description:
name: tuple
url: "https://pub.dartlang.org"
source: hosted
version: "2.0.1"
vector_math:
dependency: transitive
description:
@ -156,5 +254,20 @@ packages:
url: "https://pub.dartlang.org"
source: hosted
version: "2.1.2"
win32:
dependency: transitive
description:
name: win32
url: "https://pub.dartlang.org"
source: hosted
version: "3.1.3"
xdg_directories:
dependency: transitive
description:
name: xdg_directories
url: "https://pub.dartlang.org"
source: hosted
version: "0.2.0+2"
sdks:
dart: ">=2.18.6 <3.0.0"
flutter: ">=3.0.0"

3
pubspec.yaml
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@ -36,6 +36,9 @@ dependencies:
# The following adds the Cupertino Icons font to your application.
# Use with the CupertinoIcons class for iOS style icons.
cupertino_icons: ^1.0.2
path_provider: ^2.0.11
petitparser: ^5.1.0
tuple: ^2.0.1
dev_dependencies:
flutter_test: