From e228b9019db52bfa40dfbae80e9fc8a7642b3a8c Mon Sep 17 00:00:00 2001
From: Gian-Andrea Hutter <huttegia@students.zhaw.ch>
Date: Sat, 22 Oct 2022 11:52:06 +0200
Subject: [PATCH] #17 implementation JsonTaskDatabase.java, gradle import for
 jackson

---
 build.gradle                                  |  2 +
 .../gartenverwaltung/io/JsonTaskDatabase.java | 67 +++++++++++++++++++
 .../gartenverwaltung/io/TaskDatabase.java     |  2 +-
 src/main/java/module-info.java                |  2 +
 4 files changed, 72 insertions(+), 1 deletion(-)
 create mode 100644 src/main/java/ch/zhaw/gartenverwaltung/io/JsonTaskDatabase.java

diff --git a/build.gradle b/build.gradle
index 5268664..ad6e0a5 100644
--- a/build.gradle
+++ b/build.gradle
@@ -37,6 +37,8 @@ dependencies {
 
     testImplementation("org.junit.jupiter:junit-jupiter-api:${junitVersion}")
     testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:${junitVersion}")
+    implementation group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.13.4'
+    implementation 'com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.13.4'
 }
 
 test {
diff --git a/src/main/java/ch/zhaw/gartenverwaltung/io/JsonTaskDatabase.java b/src/main/java/ch/zhaw/gartenverwaltung/io/JsonTaskDatabase.java
new file mode 100644
index 0000000..c6a52a2
--- /dev/null
+++ b/src/main/java/ch/zhaw/gartenverwaltung/io/JsonTaskDatabase.java
@@ -0,0 +1,67 @@
+package ch.zhaw.gartenverwaltung.io;
+
+import ch.zhaw.gartenverwaltung.types.Task;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
+import com.fasterxml.jackson.datatype.jsr310.deser.MonthDayDeserializer;
+
+import java.io.File;
+import java.io.IOException;
+import java.net.URL;
+import java.time.MonthDay;
+import java.time.format.DateTimeFormatter;
+import java.util.Collections;
+import java.util.Date;
+import java.util.List;
+import java.util.Optional;
+
+public class JsonTaskDatabase implements TaskDatabase{
+    private final URL dataSource = getClass().getResource("taskdb.json");
+
+    private final static JavaTimeModule timeModule = new JavaTimeModule();
+    static {
+        DateTimeFormatter dateFormat = DateTimeFormatter.ofPattern("MM-dd");
+        MonthDayDeserializer dateDeserializer = new MonthDayDeserializer(dateFormat);
+        timeModule.addDeserializer(MonthDay.class, dateDeserializer);
+    }
+
+    @Override
+    public List<Task> getTaskList(Date start, Date end) throws IOException{
+        List<Task> taskList = Collections.emptyList();
+
+        if (dataSource != null) {
+            ObjectMapper mapper = new ObjectMapper();
+            mapper.registerModule(timeModule);
+
+            taskList = mapper.readerForListOf(Task.class).readValue(dataSource);
+        }
+
+        return taskList;
+    }
+
+    @Override
+    public void saveTask(Task task) throws IOException {
+        ObjectMapper mapper = new ObjectMapper();
+        if(dataSource != null) {
+            mapper.writeValue(new File(dataSource.getFile()), task);
+        } else {
+            mapper.writeValue(new File("taskdb.json"),task);
+        }
+    }
+
+    @Override
+    public void removeTask(Task task) throws IOException {
+        List<Task> taskList;
+
+        if(dataSource != null) {
+            ObjectMapper mapper = new ObjectMapper();
+            taskList = mapper.readerForListOf(Task.class).readValue(dataSource);
+            for (int index = 0; index < taskList.size(); index++){
+                if(task.equals(taskList.get(index))){
+                    taskList.remove(task);
+                    break;
+                }
+            }
+        }
+    }
+}
diff --git a/src/main/java/ch/zhaw/gartenverwaltung/io/TaskDatabase.java b/src/main/java/ch/zhaw/gartenverwaltung/io/TaskDatabase.java
index 73cf8e0..4c71397 100644
--- a/src/main/java/ch/zhaw/gartenverwaltung/io/TaskDatabase.java
+++ b/src/main/java/ch/zhaw/gartenverwaltung/io/TaskDatabase.java
@@ -7,7 +7,7 @@ import java.util.Date;
 import java.util.List;
 
 public interface TaskDatabase {
-    List<Task> getTaskList(Date start, Date end);
+    List<Task> getTaskList(Date start, Date end) throws IOException;
     void saveTask(Task task) throws IOException;
     void removeTask(Task task) throws IOException;
 }
diff --git a/src/main/java/module-info.java b/src/main/java/module-info.java
index 4bffe36..fce2f6b 100644
--- a/src/main/java/module-info.java
+++ b/src/main/java/module-info.java
@@ -1,6 +1,8 @@
 module ch.zhaw.gartenverwaltung {
     requires javafx.controls;
     requires javafx.fxml;
+    requires com.fasterxml.jackson.databind;
+    requires com.fasterxml.jackson.datatype.jsr310;
 
 
     opens ch.zhaw.gartenverwaltung to javafx.fxml;