#24 todo app

files-api/src/main/java/de/nbscloud/files/api/FilesService.java

@@ -65,7 +65,7 @@ public interface FilesService {
         }
     }
 
-    void createAppDirectory(App app);
+    void createAppDirectoryIfNotExists(App app);
 
     void createDirectory(App app, Path path);
 
@@ -81,7 +81,7 @@ public interface FilesService {
      * Paths in return list are always relative to the appDir. Non-recursive list.
      *
      * @param app to list the files for
-     * @param path in case of {@link Optional#EMPTY} the appDir is used as start dir. If not empty, path has to be relative
+     * @param path in case of an empty optional the appDir is used as start dir. If not empty, path has to be relative
      * to the appDir
      */
     List<ContentContainer> list(App app, Optional<Path> path);

files/src/main/java/de/nbscloud/files/FilesServiceImpl.java

@@ -28,7 +28,7 @@ public class FilesServiceImpl implements FilesService {
     }
 
     @Override
-    public void createAppDirectory(App app) {
+    public void createAppDirectoryIfNotExists(App app) {
         try {
             this.fileSystemService.createDirectory(resolve(app, Path.of("")));
         }

files/src/main/java/de/nbscloud/files/controller/FilesController.java

@@ -4,6 +4,7 @@ import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import de.nbscloud.files.FileSystemService;
 import de.nbscloud.files.LocationTracker;
+import de.nbscloud.files.SessionInfo;
 import de.nbscloud.files.Share;
 import de.nbscloud.files.api.FilesService.ContentContainer;
 import de.nbscloud.files.config.FilesConfig;
@@ -12,9 +13,9 @@ import de.nbscloud.files.form.PasswordForm;
 import de.nbscloud.files.form.RenameForm;
 import de.nbscloud.files.form.ShareForm;
 import de.nbscloud.webcontainer.MessageHelper;
-import de.nbscloud.files.SessionInfo;
 import de.nbscloud.webcontainer.registry.AppRegistry;
 import de.nbscloud.webcontainer.shared.config.WebContainerSharedConfig;
+import de.nbscloud.webcontainer.shared.util.ControllerUtils;
 import org.apache.commons.io.input.ObservableInputStream;
 import org.apache.commons.lang3.StringUtils;
 import org.slf4j.Logger;
@@ -43,7 +44,6 @@ import java.time.Instant;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.time.ZoneId;
-import java.time.format.DateTimeFormatter;
 import java.util.List;
 import java.util.Optional;
 import java.util.UUID;
@@ -248,11 +248,6 @@ public class FilesController implements InitializingBean {
         final Path filePath = this.locationTracker.getRelativeToBaseDir(this.locationTracker.resolve(filename));
         final String shareUuid = UUID.randomUUID().toString();
         final Share share = new Share();
-        // The format is always "yyyy-MM-dd", see https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/date
-        final LocalDate expiryDate = Optional.ofNullable(expiryDateString)
-                                             .map(ed -> ed.isBlank() ? null : ed)
-                                             .map(ed -> LocalDate.parse(ed, DateTimeFormatter.ofPattern("yyyy-MM-dd")))
-                                             .orElse(null);
 
         if(StringUtils.isEmpty(password)) {
             password = null; // if no real password has been provided assume no password
@@ -260,7 +255,7 @@ public class FilesController implements InitializingBean {
 
         share.setUuid(shareUuid);
         share.setPath(filePath.toString());
-        share.setExpiryDate(expiryDate);
+        share.setExpiryDate(ControllerUtils.parseDate(expiryDateString));
         share.setOneTime(oneTime);
         share.setPassword(password);
 
@@ -281,6 +276,10 @@ public class FilesController implements InitializingBean {
 
     @GetMapping("/files/shares/files/browse/**")
     public String sharesStart(Model model, HttpServletRequest httpServletRequest, String sortOrder) {
+        if(!this.sessionInfo.isRestrictedSession()) {
+            throw new IllegalStateException();
+        }
+
         final String start = start(model, httpServletRequest, sortOrder);
 
         model.addAttribute("prefix", "/files/shares");
@@ -301,8 +300,6 @@ public class FilesController implements InitializingBean {
             final Optional<LocalDate> optExpiryDate = Optional.ofNullable(share.getExpiryDate());
             final boolean expired = optExpiryDate.map(expiryDate -> LocalDate.now().isAfter(expiryDate)).orElse(false);
 
-            this.sessionInfo.setRestrictedSession(true);
-
             if(share.getPassword() != null) {
                 model.addAttribute("form", new PasswordForm(shareUuid, null));
                 this.webContainerSharedConfig.addDefaults(model);
@@ -320,6 +317,8 @@ public class FilesController implements InitializingBean {
                     this.locationTracker.setBaseDirPath(share.getPath());
                     this.locationTracker.resetCurrentLocation();
 
+                    this.sessionInfo.setRestrictedSession(true);
+
                     return "redirect:/files/browse/";
                 }
                 else {
@@ -354,6 +353,8 @@ public class FilesController implements InitializingBean {
                     this.locationTracker.setBaseDirPath(share.getPath());
                     this.locationTracker.resetCurrentLocation();
 
+                    this.sessionInfo.setRestrictedSession(true);
+
                     return "redirect:/files/browse/";
                 }
                 else {
@@ -408,6 +409,10 @@ public class FilesController implements InitializingBean {
 
     @GetMapping("/files/shares/files/preview")
     public void sharesPreview(HttpServletResponse response, String filename) {
+        if(!this.sessionInfo.isRestrictedSession()) {
+            throw new IllegalStateException();
+        }
+
         preview(response, filename);
     }
 
@@ -426,6 +431,10 @@ public class FilesController implements InitializingBean {
 
     @GetMapping("/files/shares/files/gallery")
     public String sharesGallery(Model model) {
+        if(!this.sessionInfo.isRestrictedSession()) {
+            throw new IllegalStateException();
+        }
+
         final String gallery = gallery(model);
 
         model.addAttribute("prefix", "/files/shares");

notes/src/main/java/de/nbscloud/notes/controller/NotesController.java

@@ -20,7 +20,7 @@ import java.nio.file.Path;
 import java.util.Optional;
 
 @Controller
-public class NotesController implements InitializingBean {
+public class NotesController {
     private static final Logger logger = LoggerFactory.getLogger(NotesController.class);
 
     @Autowired
@@ -42,6 +42,8 @@ public class NotesController implements InitializingBean {
 
     @GetMapping("/notes")
     public String start(Model model, @RequestParam(required = false) String notePath) {
+        this.filesService.createAppDirectoryIfNotExists(this.app);
+
         final Optional<Path> optNotePath = notePathToPath(notePath);
 
         if(optNotePath.isPresent()) {
@@ -121,9 +123,4 @@ public class NotesController implements InitializingBean {
 
         return "redirect:?notePath=" + currentPath;
     }
-
-    @Override
-    public void afterPropertiesSet() throws Exception {
-        //this.filesService.createAppDirectory(this.app);
-    }
 }

todo/pom.xml

@@ -31,5 +31,9 @@
             <artifactId>spring-boot-starter-web</artifactId>
             <scope>provided</scope>
         </dependency>
+        <dependency>
+            <groupId>de.77zzcx7.nbs-cloud</groupId>
+            <artifactId>files-api</artifactId>
+        </dependency>
     </dependencies>
 </project>

todo/src/main/java/de/nbscloud/todo/Category.java

@@ -0,0 +1,5 @@
+package de.nbscloud.todo;
+
+public enum Category {
+    A, B, C;
+}

todo/src/main/java/de/nbscloud/todo/TodoApp.java

@@ -1,19 +1,26 @@
 package de.nbscloud.todo;
 
+import de.nbscloud.todo.widget.TodoWidget;
 import de.nbscloud.webcontainer.registry.App;
 import de.nbscloud.webcontainer.registry.AppRegistry;
+import de.nbscloud.webcontainer.registry.Widget;
 import org.springframework.beans.factory.InitializingBean;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Component;
 
+import java.util.Collection;
+import java.util.List;
+
 @Component
 public class TodoApp implements App, InitializingBean {
+
+    public static final String ID = "todo";
     @Autowired
     private AppRegistry appRegistry;
 
     @Override
     public String getId() {
-        return "todo";
+        return ID;
     }
 
     @Override
@@ -31,6 +38,11 @@ public class TodoApp implements App, InitializingBean {
         return 40;
     }
 
+    @Override
+    public Collection<Widget> getWidgets() {
+        return List.of(new TodoWidget());
+    }
+
     @Override
     public void afterPropertiesSet() throws Exception {
         this.appRegistry.registerApp(this);

todo/src/main/java/de/nbscloud/todo/TodoItem.java

@@ -0,0 +1,74 @@
+package de.nbscloud.todo;
+
+import java.time.LocalDate;
+import java.util.UUID;
+
+public class TodoItem {
+    private String id;
+    private boolean done;
+    private String text;
+    private Category category;
+    private LocalDate added;
+    private LocalDate due;
+
+    public static final TodoItem create(boolean done, String text, Category category, LocalDate added, LocalDate due) {
+        final TodoItem item = new TodoItem();
+
+        item.setDone(done);
+        item.setText(text);
+        item.setCategory(category);
+        item.setAdded(added);
+        item.setDue(due);
+        item.setId(UUID.randomUUID().toString());
+
+        return item;
+    }
+
+    public boolean isDone() {
+        return done;
+    }
+
+    public void setDone(boolean done) {
+        this.done = done;
+    }
+
+    public String getText() {
+        return text;
+    }
+
+    public void setText(String text) {
+        this.text = text;
+    }
+
+    public Category getCategory() {
+        return category;
+    }
+
+    public void setCategory(Category category) {
+        this.category = category;
+    }
+
+    public LocalDate getAdded() {
+        return added;
+    }
+
+    public void setAdded(LocalDate added) {
+        this.added = added;
+    }
+
+    public LocalDate getDue() {
+        return due;
+    }
+
+    public void setDue(LocalDate due) {
+        this.due = due;
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+}

todo/src/main/java/de/nbscloud/todo/TodoList.java

@@ -0,0 +1,16 @@
+package de.nbscloud.todo;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class TodoList {
+    private List<TodoItem> todos = new ArrayList<>();
+
+    public List<TodoItem> getTodos() {
+        return todos;
+    }
+
+    public void setTodos(List<TodoItem> todos) {
+        this.todos = todos;
+    }
+}

todo/src/main/java/de/nbscloud/todo/controller/TodoController.java

@@ -0,0 +1,159 @@
+package de.nbscloud.todo.controller;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import de.nbscloud.files.api.FilesService;
+import de.nbscloud.todo.Category;
+import de.nbscloud.todo.TodoApp;
+import de.nbscloud.todo.TodoItem;
+import de.nbscloud.todo.TodoList;
+import de.nbscloud.webcontainer.MessageHelper;
+import de.nbscloud.webcontainer.registry.AppRegistry;
+import de.nbscloud.webcontainer.shared.config.WebContainerSharedConfig;
+import de.nbscloud.webcontainer.shared.util.ControllerUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+
+import java.nio.charset.StandardCharsets;
+import java.nio.file.NoSuchFileException;
+import java.nio.file.Path;
+import java.time.LocalDate;
+import java.util.*;
+import java.util.stream.Collectors;
+
+@Controller
+public class TodoController {
+    private static final Logger logger = LoggerFactory.getLogger(TodoController.class);
+
+    public static final Comparator<TodoItem> TODO_ITEM_COMPARATOR = Comparator.comparing(TodoItem::isDone)
+                                                                              .thenComparing(TodoItem::getDue,
+                                                                                      Comparator.nullsLast(Comparator.naturalOrder()))
+                                                                              .thenComparing(TodoItem::getAdded);
+    static final Path FILENAME = Path.of("todo");
+
+    @Autowired
+    private AppRegistry appRegistry;
+    @Autowired
+    private FilesService filesService;
+    @Autowired
+    private WebContainerSharedConfig webContainerSharedConfig;
+    @Autowired
+    private TodoApp app;
+    @Autowired
+    private MessageHelper messageHelper;
+    @Autowired
+    private ObjectMapper mapper;
+
+    @GetMapping("/todo")
+    public String start(Model model) {
+        try {
+            this.filesService.createAppDirectoryIfNotExists(this.app);
+
+            final String todoListJson = new String(this.filesService.get(app, FILENAME));
+            final TodoList todos = mapper.readValue(todoListJson, TodoList.class);
+            final Map<Category, List<TodoItem>> categoryMap = new TreeMap<>(Comparator.comparing(Category::name));
+
+            todos.getTodos().stream().collect(Collectors.groupingBy(TodoItem::getCategory, () -> categoryMap, Collectors.toList()));
+
+            if(categoryMap.containsKey(Category.A)) {
+                Collections.sort(categoryMap.get(Category.A), TODO_ITEM_COMPARATOR);
+            }
+
+            if(categoryMap.containsKey(Category.B)) {
+                Collections.sort(categoryMap.get(Category.B), TODO_ITEM_COMPARATOR);
+            }
+
+            if(categoryMap.containsKey(Category.C)) {
+                Collections.sort(categoryMap.get(Category.C), TODO_ITEM_COMPARATOR);
+            }
+
+            model.addAttribute("todosByCategory", categoryMap);
+        }
+        catch(JsonProcessingException e) {
+            logger.error("Error while parsing todo file", e);
+
+            this.messageHelper.addError(e.getMessage());
+        }
+        catch(RuntimeException re) {
+            if(re.getCause() instanceof NoSuchFileException) {
+                logger.debug("Todo file does not exist, create it");
+
+                try {
+                    this.filesService.createFile(app, FILENAME, mapper.writeValueAsString(new TodoList()).getBytes(StandardCharsets.UTF_8));
+                } catch (JsonProcessingException e) {
+                    throw new RuntimeException(e);
+                }
+            }
+            else {
+                logger.error("Error while reading todo file", re);
+
+                this.messageHelper.addError(re.getMessage());
+            }
+        }
+
+        model.addAttribute("categories", Category.values());
+        this.messageHelper.addAndClearAll(model);
+        model.addAttribute("apps", this.appRegistry.getAll());
+        this.webContainerSharedConfig.addDefaults(model);
+
+        return "todo/todoIndex";
+    }
+
+    @PostMapping("/todo/addItem")
+    public String addItem(Model model, String text, Category category, String due) {
+        try {
+            final String todoListJson = new String(this.filesService.get(app, FILENAME));
+            final TodoList todos = mapper.readValue(todoListJson, TodoList.class);
+
+            todos.getTodos().add(TodoItem.create(false, text, category, LocalDate.now(), ControllerUtils.parseDate(due)));
+
+            this.filesService.overwriteFile(app, FILENAME, mapper.writeValueAsBytes(todos));
+
+            this.messageHelper.addInfo("nbscloud.todo.item.add");
+        } catch (JsonProcessingException e) {
+            logger.error("Error", e);
+
+            this.messageHelper.addError(e.getMessage());
+        }
+
+        model.addAttribute("categories", Category.values());
+        model.addAttribute("apps", this.appRegistry.getAll());
+        this.webContainerSharedConfig.addDefaults(model);
+
+        return "redirect:";
+    }
+
+    @PostMapping("/todo/toggle")
+    public String toggle(Model model, String id, boolean done) {
+        try {
+            final String todoListJson = new String(this.filesService.get(app, FILENAME));
+            final TodoList todos = mapper.readValue(todoListJson, TodoList.class);
+
+            todos.getTodos().stream().filter(item -> item.getId().equals(id)).findFirst().ifPresent(item -> item.setDone(done));
+
+            this.filesService.overwriteFile(app, FILENAME, mapper.writeValueAsBytes(todos));
+
+            if(done) {
+                this.messageHelper.addInfo("nbscloud.todo.item.toggle.done");
+            }
+            else {
+                this.messageHelper.addInfo("nbscloud.todo.item.toggle.inprogress");
+            }
+        } catch (JsonProcessingException e) {
+            logger.error("Error", e);
+
+            this.messageHelper.addError(e.getMessage());
+        }
+
+        model.addAttribute("categories", Category.values());
+        model.addAttribute("apps", this.appRegistry.getAll());
+        this.webContainerSharedConfig.addDefaults(model);
+
+        return "redirect:";
+    }
+}

todo/src/main/java/de/nbscloud/todo/controller/TodoWidgetController.java

@@ -0,0 +1,58 @@
+package de.nbscloud.todo.controller;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import de.nbscloud.files.api.FilesService;
+import de.nbscloud.todo.Category;
+import de.nbscloud.todo.TodoApp;
+import de.nbscloud.todo.TodoItem;
+import de.nbscloud.todo.TodoList;
+import de.nbscloud.webcontainer.shared.config.WebContainerSharedConfig;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.util.*;
+import java.util.stream.Collectors;
+
+@Controller
+public class TodoWidgetController {
+    private static final Logger logger = LoggerFactory.getLogger(TodoWidgetController.class);
+
+    @Autowired
+    private WebContainerSharedConfig webContainerSharedConfig;
+    @Autowired
+    private FilesService filesService;
+    @Autowired
+    private TodoApp app;
+    @Autowired
+    private ObjectMapper mapper;
+
+    @GetMapping("todo/widgets/todoOverview")
+    public String getTodoOverview(HttpServletRequest request, HttpServletResponse response, Model model) {
+        try {
+            this.filesService.createAppDirectoryIfNotExists(this.app);
+
+            final String todoListJson = new String(this.filesService.get(app, TodoController.FILENAME));
+            final TodoList todos = mapper.readValue(todoListJson, TodoList.class);
+            final List<TodoItem> topFiveTodos = todos.getTodos().stream().filter(item -> !item.isDone()).sorted(
+                    Comparator.comparing(TodoItem::getDue,
+                                      Comparator.nullsLast(Comparator.naturalOrder()))
+                              .thenComparing(TodoItem::getCategory)
+                              .thenComparing(TodoItem::getAdded)).limit(5).collect(Collectors.toList());
+
+            model.addAttribute("todos", topFiveTodos);
+        }
+        catch(JsonProcessingException e) {
+            logger.error("Error while parsing todo file", e);
+        }
+
+
+        return "todo/widgets/todoOverview :: todo-overview";
+    }
+}

todo/src/main/java/de/nbscloud/todo/widget/TodoWidget.java

@@ -0,0 +1,11 @@
+package de.nbscloud.todo.widget;
+
+import de.nbscloud.todo.TodoApp;
+import de.nbscloud.webcontainer.registry.Widget;
+
+public class TodoWidget implements Widget {
+    @Override
+    public String getPath() {
+        return TodoApp.ID + "/widgets/todoOverview";
+    }
+}

todo/src/main/resources/i18n/todo_messages.properties

@@ -0,0 +1,7 @@
+nbscloud.todo.index.title=nbscloud - todo
+
+nbscloud.todo.widget.heading=todo overview
+
+nbscloud.todo.item.add=Todo added
+nbscloud.todo.item.toggle.done=Done
+nbscloud.todo.item.toggle.inprogress=In progress

todo/src/main/resources/i18n/todo_messages_de_DE.properties

@@ -0,0 +1,7 @@
+nbscloud.todo.index.title=nbscloud - todo
+
+nbscloud.todo.widget.heading=todo \u00FCbersicht
+
+nbscloud.todo.item.add=Todo hinzugef\u00FCgt
+nbscloud.todo.item.toggle.done=Fertig
+nbscloud.todo.item.toggle.inprogress=Unfertig

todo/src/main/resources/static/css/todo_main.css

@@ -0,0 +1,24 @@
+#content-container {
+    display: flex;
+    flex-direction: row;
+    flex-wrap: wrap;
+    row-gap: 2em;
+    column-gap: 2em;
+}
+
+.todo-category {
+    flex-grow: 1;
+    background-color:var(--background-color-highlight);
+    padding: 1em;
+    align-self: stretch;
+    word-break: break-all;
+    flex-basis: 100%;
+}
+
+.todo-category-header {
+    text-decoration-line: underline;
+}
+
+.todo-item > td:nth-child(2) {
+    padding-inline: 3em;
+}

todo/src/main/resources/templates/todo/includes/menu.html

@@ -0,0 +1,24 @@
+<div id="menu-container" th:fragment="menu">
+    <div class="menu-spacer"></div>
+    <div id="add-item-container" class="menu-container">
+        <details>
+            <summary>
+                <span id="add-item-container-span-input" class="icon menu-icon">&#xf23a;</span>
+            </summary>
+            <div class="menu-modal">
+                <div class="menu-modal-content">
+                    <form method="POST" action="#" th:action="@{/todo/addItem}" enctype="multipart/form-data">
+                        <input id="add-item-container-text" type="text" name="text" />
+                        <select size="1" id="add-item-category" name="category">
+                            <option th:each="category : ${categories}"
+                                    th:value="${category}"
+                                    th:text="${category}" />
+                        </select>
+                        <input type="date" id="add-item-due" name="due"/>
+                        <input type="submit" value="Add"/>
+                    </form>
+                </div>
+            </div>
+        </details>
+    </div>
+</div>

todo/src/main/resources/templates/todo/todoIndex.html

@@ -0,0 +1,39 @@
+<!DOCTYPE HTML>
+<html xmlns:th="http://www.thymeleaf.org">
+<head>
+    <title th:text="#{nbscloud.todo.index.title}"/>
+
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <link th:if="${darkMode}" rel="stylesheet" th:href="@{/css/darkModeColors.css}"/>
+    <link th:if="${!darkMode}" rel="stylesheet" th:href="@{/css/lightModeColors.css}"/>
+    <link rel="stylesheet" th:href="@{/css/main.css}"/>
+    <link rel="stylesheet" th:href="@{/css/todo_main.css}"/>
+    <link rel="shortcut icon" th:href="@{/favicon.ico}"/>
+</head>
+<body>
+<div id="main-container">
+    <div th:replace="includes/header :: header"/>
+    <div th:replace="includes/messages :: messages"/>
+    <div th:replace="todo/includes/menu :: menu"/>
+    <div id="content-container">
+        <div class="todo-category" th:each="entry : ${todosByCategory}">
+            <p th:text="${#strings.prepend(#strings.append(entry.key, #strings.repeat('&nbsp;', 10)), '&nbsp;')}"
+               class="todo-category-header"/>
+            <table id="todo-item-table">
+                <tr class="todo-item" th:each="todo : ${entry.value}">
+                    <td>
+                        <form method="POST" th:action="@{/todo/toggle}" enctype="multipart/form-data">
+                            <input type="checkbox" th:checked="${todo.done}" name="done" onClick="this.form.submit()" /> <!-- fucking javascript -->
+                            <input type="hidden" name="id" th:value="${todo.id}" class="display-none"/>
+                        </form>
+                    </td>
+                    <td th:text="${todo.text}"/>
+                    <td th:text="${todo.due}"/>
+                </tr>
+            </table>
+        </div>
+    </div>
+    <div th:replace="includes/footer :: footer"/>
+</div>
+</body>
+</html>

todo/src/main/resources/templates/todo/widgets/todoOverview.html

@@ -0,0 +1,12 @@
+<div id="todo-widget" class="widget" th:fragment="todo-overview">
+    <p class="widget-heading" th:text="#{nbscloud.todo.widget.heading}"/>
+    <table id="todo-widget-table">
+        <tbody>
+        <tr th:each="todo : ${todos}">
+            <td th:text="${todo.category}"/>
+            <td th:text="${todo.text}"/>
+            <td th:text="${todo.due}"/>
+        </tr>
+        </tbody>
+    </table>
+</div>

web-container-config/src/main/java/de/nbscloud/webcontainer/shared/util/ControllerUtils.java

@@ -0,0 +1,16 @@
+package de.nbscloud.webcontainer.shared.util;
+
+import java.time.LocalDate;
+import java.time.format.DateTimeFormatter;
+import java.util.Optional;
+
+public class ControllerUtils {
+
+    public static LocalDate parseDate(String date) {
+        // The format is always "yyyy-MM-dd", see https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/date
+        return Optional.ofNullable(date)
+                                             .map(ed -> ed.isBlank() ? null : ed)
+                                             .map(ed -> LocalDate.parse(ed, DateTimeFormatter.ofPattern("yyyy-MM-dd")))
+                                             .orElse(null);
+    }
+}

web-container/src/main/resources/config/application.properties

@@ -9,7 +9,7 @@ info.build.group=@project.groupId@
 info.build.artifact=@project.artifactId@
 info.build.version=@project.version@
 
-spring.messages.basename=i18n/container_messages,i18n/files_messages,i18n/dashboard_messages,i18n/notes_messages
+spring.messages.basename=i18n/container_messages,i18n/files_messages,i18n/dashboard_messages,i18n/notes_messages,i18n/todo_messages
 
 spring.servlet.multipart.max-file-size=-1
 spring.servlet.multipart.max-request-size=-1