From 7d24ed12296a808c71906a18e7195441b1f03008 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20B=C3=B6ckelmann?= <uqpko@student.kit.edu>
Date: Fri, 15 Mar 2024 18:07:40 +0100
Subject: [PATCH] Implement Generating Repeating Task on Weekly Basis

---
 .../api/controller/TaskSeriesController.java  | 13 ++----
 .../repeatinginfo/TaskRepeatWeekDayInfo.java  | 30 ++++++++++++-
 .../repeatinginfo/TaskRepeatWeekInfo.java     |  6 ++-
 .../java/core/services/TaskSeriesService.java | 45 ++++++++++++++++++-
 4 files changed, 81 insertions(+), 13 deletions(-)

diff --git a/backend/src/main/java/core/api/controller/TaskSeriesController.java b/backend/src/main/java/core/api/controller/TaskSeriesController.java
index c2d2994..bc0238b 100644
--- a/backend/src/main/java/core/api/controller/TaskSeriesController.java
+++ b/backend/src/main/java/core/api/controller/TaskSeriesController.java
@@ -21,15 +21,10 @@ public class TaskSeriesController {
     @Autowired private TaskService taskService;
     @Autowired private TaskSeriesService taskSeriesService;
 
-    @PostMapping("/tasks/{taskID}/taskseries/weekly")
-    public ResponseEntity<?> onCreateTaskSeries(@PathVariable long taskID, @Valid @RequestBody TaskRepeatWeekInfo taskRepeatWeekInfo) {
-        var taskPermission = taskService.getTaskPermissions(taskID, SecurityContextHolder.getContext().getAuthentication().getName());
-        if(taskPermission.hasIssue()) {
-            return taskPermission.mapToResponseEntity();
-        } else {
-            ServiceExitCode serviceExitCode = taskSeriesService.createTaskSeries(taskPermission.getResult(), taskRepeatWeekInfo);
-            return serviceExitCode.mapToResponseEntity();
-        }
+    @PostMapping("/tasks/taskseries/weekly")
+    public ResponseEntity<?> onCreateTaskSeries(@Valid @RequestBody TaskRepeatWeekInfo taskRepeatWeekInfo) {
+        ServiceExitCode serviceExitCode = taskSeriesService.createTaskSeries(taskRepeatWeekInfo);
+        return serviceExitCode.mapToResponseEntity();
     }
 
     @PostMapping("/tasks/{taskID}/taskseries/daily")
diff --git a/backend/src/main/java/core/api/models/timemanager/tasks/repeatinginfo/TaskRepeatWeekDayInfo.java b/backend/src/main/java/core/api/models/timemanager/tasks/repeatinginfo/TaskRepeatWeekDayInfo.java
index 8589f14..0466638 100644
--- a/backend/src/main/java/core/api/models/timemanager/tasks/repeatinginfo/TaskRepeatWeekDayInfo.java
+++ b/backend/src/main/java/core/api/models/timemanager/tasks/repeatinginfo/TaskRepeatWeekDayInfo.java
@@ -1,9 +1,37 @@
 package core.api.models.timemanager.tasks.repeatinginfo;
 
+import core.api.models.timemanager.tasks.TaskEntityInfo;
+import core.entities.timemanager.Task;
+
+import java.time.DayOfWeek;
+
 public class TaskRepeatWeekDayInfo {
 
-    private int weekday;
+    private DayOfWeek dayOfWeek;
     private int offset;
+    private long taskID;
 
+    public DayOfWeek getDayOfWeek() {
+        return dayOfWeek;
+    }
 
+    public void setDayOfWeek(DayOfWeek dayOfWeek) {
+        this.dayOfWeek = dayOfWeek;
+    }
+
+    public int getOffset() {
+        return offset;
+    }
+
+    public void setOffset(int offset) {
+        this.offset = offset;
+    }
+
+    public long getTaskID() {
+        return taskID;
+    }
+
+    public void setTaskID(long taskID) {
+        this.taskID = taskID;
+    }
 }
diff --git a/backend/src/main/java/core/api/models/timemanager/tasks/repeatinginfo/TaskRepeatWeekInfo.java b/backend/src/main/java/core/api/models/timemanager/tasks/repeatinginfo/TaskRepeatWeekInfo.java
index 19a4ce8..fc5301f 100644
--- a/backend/src/main/java/core/api/models/timemanager/tasks/repeatinginfo/TaskRepeatWeekInfo.java
+++ b/backend/src/main/java/core/api/models/timemanager/tasks/repeatinginfo/TaskRepeatWeekInfo.java
@@ -1,5 +1,6 @@
 package core.api.models.timemanager.tasks.repeatinginfo;
 
+import com.fasterxml.jackson.annotation.JsonFormat;
 import org.hibernate.validator.constraints.Length;
 
 import java.time.LocalDate;
@@ -9,10 +10,11 @@ public class TaskRepeatWeekInfo {
 
     @Length(min = 1, max = 7)
     private List<TaskRepeatWeekDayInfo> weekDayInfos;
-
     private DeadlineStrategy deadlineStrategy;
-
+    @JsonFormat(pattern = "yyyy-MM-dd'T'HH:mm:ss.SSSXXX")
     private LocalDate endDate;
+    @JsonFormat(pattern = "yyyy-MM-dd'T'HH:mm:ss.SSSXXX")
+    private LocalDate startDate;
 
     public List<TaskRepeatWeekDayInfo> getWeekDayInfos() {
         return weekDayInfos;
diff --git a/backend/src/main/java/core/services/TaskSeriesService.java b/backend/src/main/java/core/services/TaskSeriesService.java
index 5952dab..7541fd1 100644
--- a/backend/src/main/java/core/services/TaskSeriesService.java
+++ b/backend/src/main/java/core/services/TaskSeriesService.java
@@ -2,6 +2,7 @@ package core.services;
 
 import core.api.models.timemanager.tasks.repeatinginfo.DeadlineStrategy;
 import core.api.models.timemanager.tasks.repeatinginfo.TaskRepeatDayInfo;
+import core.api.models.timemanager.tasks.repeatinginfo.TaskRepeatWeekDayInfo;
 import core.api.models.timemanager.tasks.repeatinginfo.TaskRepeatWeekInfo;
 import core.entities.timemanager.Task;
 import core.entities.timemanager.TaskSerie;
@@ -13,10 +14,12 @@ import core.repositories.timemanager.TaskSeriesRepository;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
+import java.time.Duration;
 import java.time.LocalDate;
 import java.util.ArrayList;
 import java.util.Comparator;
 import java.util.List;
+import java.util.Optional;
 
 @Service
 public class TaskSeriesService {
@@ -26,8 +29,48 @@ public class TaskSeriesService {
     @Autowired private TaskSerieItemRepository taskSerieItemRepository;
 
 
+    public ServiceExitCode createTaskSeries(TaskRepeatWeekInfo taskRepeatInfo) {
+        List<Task> createdTasks = new ArrayList<>();
+        TaskSerie taskSerie = new TaskSerie();
+        for(TaskRepeatWeekDayInfo taskRepeatDayInfo : taskRepeatInfo.getWeekDayInfos()) {
+            Optional<Task> task = taskRepository.findById(taskRepeatDayInfo.getTaskID());
+            if(task.isEmpty()) return ServiceExitCode.MISSING_ENTITY;
+
+            LocalDate currentTaskDate = task.get().getStartDate().plusDays(taskRepeatDayInfo.getOffset());
+            while(currentTaskDate.isBefore(taskRepeatInfo.getEndDate())) {
+                Task clonedTask = Task.cloneTask(task.get());
+                clonedTask.setStartDate(currentTaskDate);
+
+                TaskSerieItem taskSerieItem = taskSerie.addTask(clonedTask);
+                clonedTask.setTaskSerieItem(taskSerieItem);
+                createdTasks.add(clonedTask);
+            }
+        }
+
+        taskSerie.getTasks().sort(Comparator.comparing(o -> o.getTask().getStartDate()));
+        for(int i=0; i<taskSerie.getTasks().size(); i++) {
+            taskSerie.getTasks().get(i).setSeriesIndex(i);
+            if(taskRepeatInfo.getDeadlineStrategy() == DeadlineStrategy.DEADLINE_EQUAL_START) {
+                taskSerie.getTasks().get(i).getTask().setDeadline(taskSerie.getTasks().get(i).getTask().getStartDate());
+            } else {
+                if(i + 1 == taskSerie.getTasks().size()) {
+                    int firstWeekDayIndex = i % taskRepeatInfo.getWeekDayInfos().size();
+                    LocalDate reference_start = taskSerie.getTasks().get(firstWeekDayIndex).getTask().getStartDate();
+                    LocalDate reference_deadline = taskSerie.getTasks().get(firstWeekDayIndex).getTask().getDeadline();
+
+                    Duration duration = Duration.between(reference_start, reference_deadline);
+                    long days = duration.toDays();
+                    taskSerie.getTasks().get(i).getTask().setDeadline(taskSerie.getTasks().get(i).getTask().getStartDate().plusDays(days));
+                } else {
+                    taskSerie.getTasks().get(i).getTask().setDeadline(taskSerie.getTasks().get(i+1).getTask().getStartDate().minusDays(1));
+                }
+            }
+        }
+
+        taskSeriesRepository.save(taskSerie);
+        taskRepository.saveAll(createdTasks);
+        taskSerieItemRepository.saveAll(taskSerie.getTasks());
 
-    public ServiceExitCode createTaskSeries(Task rootTask, TaskRepeatWeekInfo taskRepeatInfo) {
         return ServiceExitCode.OK;
     }