read and load json, need to fix date

.idea/libraries/google_code_gson.xml

@@ -0,0 +1,10 @@
+<component name="libraryTable">
+  <library name="google.code.gson" type="repository">
+    <properties maven-id="com.google.code.gson:gson:2.9.0" />
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/com/google/code/gson/gson/2.9.0/gson-2.9.0.jar!/" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES />
+  </library>
+</component>

cmpt213.assignment1.packagedeliveriestracker.iml

@@ -7,5 +7,6 @@
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="google.code.gson" level="project" />
   </component>
 </module>

list.json

@@ -0,0 +1 @@
+[{"name":"name","note":"notes","price":15.0,"weight":5.0,"delivered":false,"expectedDate":"2022-07-20T12:12"}]

src/Main.java

@@ -1,13 +1,70 @@
+import com.google.gson.*;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+
+import java.io.*;
+import java.time.LocalDateTime;
+import java.time.chrono.ChronoLocalDate;
+import java.time.format.DateTimeFormatter;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Scanner;
 
 public class Main {
-
+private static final String fileName = "list.json";
     private static ArrayList<PackageInfo> packageList=new ArrayList<>();
+private static void save(){
+    Gson gson = new GsonBuilder().registerTypeAdapter(LocalDateTime.class,
+            new TypeAdapter<LocalDateTime>() {
+                @Override
+                public void write(JsonWriter jsonWriter,
+                                  LocalDateTime localDateTime) throws IOException {
+                    jsonWriter.value(localDateTime.toString());
+                }
+                @Override
+                public LocalDateTime read(JsonReader jsonReader) throws IOException {
+                    return LocalDateTime.parse(jsonReader.nextString());
+                }
+            }).create();
+    try{
+        Writer w = new FileWriter(fileName);
+        gson.toJson(packageList, w);
+        w.flush();
+        w.close();
+    }
+    catch (IOException e){
+        e.printStackTrace();
+    }
+}
+
+private static void load(){
+    File file = new File(fileName);
+try{
+    JsonElement element = JsonParser.parseReader(new FileReader(fileName));
+    JsonArray array = element.getAsJsonArray();
+    for (int i = 0; i < array.size(); i++){
+        JsonObject pObj = array.get(i).getAsJsonObject();
+        System.out.println(pObj.get("expectedDate").getAsString());
+        DateTimeFormatter format = DateTimeFormatter.ofPattern("yyy-MM-dd HH:mm");
+        packageList.add(new PackageInfo(pObj.get("name").getAsString(),
+                pObj.get("note").getAsString(),
+                pObj.get("price").getAsDouble(),
+                pObj.get("weight").getAsDouble(),
+                        pObj.get("delivered").getAsBoolean(),
+                //fix date
+                LocalDateTime.parse(pObj.get("expectedDate").getAsString(), format))
+        );
+    }
+    System.out.println("packages loaded");
+}
+catch (FileNotFoundException e){
+System.out.println("no packages to load");
+    }
+}
 
     public static void main(String[] args) {
 TextMenu menu=new TextMenu();
+load();
 do{
     menu.display();
     System.out.println("choose an option between 1 and 7:");
@@ -17,6 +74,8 @@ do{
         System.out.println("invalid input");
     }
     else if(option == 7){
+        save();
+        System.out.print("packages saved");
         break;
     }
     else{
@@ -37,6 +96,5 @@ do{
 }
 while (true);
     }
-
 }