Merge pull request nus-cs2113-AY2324S1#11 from junhyeong0411/master

Storage for flashcards

src/main/java/seedu/duke/Duke.java

@@ -19,7 +19,6 @@ private void run() {
         Scanner scanner = new Scanner(System.in);
         String input;
         boolean shouldTerminate = false;
-
         while (!shouldTerminate) {
             input = scanner.nextLine();
 

src/main/java/seedu/duke/flashcard/Flashcard.java

@@ -20,6 +20,14 @@ public Flashcard(String frontText, String backText) {
         nextReviewOn = null;
     }
 
+    public String getFrontText() {
+        return frontText;
+    }
+
+    public String getBackText() {
+        return backText;
+    }
+
     public String toString() {
         return "-".repeat(80) + System.lineSeparator()
                 + "front text: " + frontText + System.lineSeparator()

src/main/java/seedu/duke/flashcard/FlashcardComponent.java

@@ -3,17 +3,31 @@
 import seedu.duke.flashcard.command.FlashcardCommand;
 import seedu.duke.flashcard.command.UnknownCommand;
 
+import java.io.FileNotFoundException;
 import java.util.ArrayList;
 
 public class FlashcardComponent {
     private FlashcardCommandParser parser;
     private FlashcardList flashcardList;
     private FlashcardUi ui;
 
+    private FlashcardStorage storage;
+
+
     public FlashcardComponent(ArrayList<Flashcard> flashcards) {
         parser = new FlashcardCommandParser();
-        flashcardList = new FlashcardList(flashcards);
+        storage = new FlashcardStorage("./flashcard.txt");
+        try {
+            flashcardList = storage.loadFlashcards();
+            System.out.println("Loading existed File");
+        } catch (FileNotFoundException e){
+            System.out.println("Making New file");
+            flashcardList = new FlashcardList(flashcards);
+        }
+
+
         ui = new FlashcardUi(flashcardList);
+
     }
 
     public boolean isResponsible(String input) {
@@ -29,5 +43,8 @@ public boolean isResponsible(String input) {
     public void processInput(String input) {
         FlashcardCommand command = parser.parseInput(input);
         ui.executeCommand(command);
+
+        // save after every commands
+        storage.saveFlashcards(flashcardList.getFlashcards());
     }
 }

src/main/java/seedu/duke/flashcard/FlashcardList.java

@@ -13,6 +13,7 @@ public ArrayList<Flashcard> getFlashcards() {
         return flashcards;
     }
 
+
     public void add(Flashcard flashcard) {
         flashcards.add(flashcard);
     }

src/main/java/seedu/duke/flashcard/FlashcardStorage.java

@@ -0,0 +1,87 @@
+package seedu.duke.flashcard;
+
+import seedu.duke.flashcard.Flashcard;
+import seedu.duke.flashcard.FlashcardList;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Scanner;
+
+/**
+ * storage for flashcards
+ * Flashcard implementation should be finished first
+ */
+public class FlashcardStorage {
+    // simply implemented for save & load first
+
+    protected String path;
+
+    public FlashcardStorage(String path){
+        this.path = path;
+    }
+
+
+    private Flashcard loadFlashcard(String[] tokens){
+        String frontText = tokens[0].trim();
+        String backText = tokens[1].trim();
+        String[] tags = tokens[2].trim().split("/");
+        String[] reviews = tokens[3].trim().split("/");
+        String nextReviewOn = tokens[4].trim();
+
+
+        Flashcard flashcard = new Flashcard(frontText, backText);
+
+        for(String tag:tags){
+            if(tag.trim().equals("-")) break;
+            else{
+                System.out.println("tags are not for v1");
+            }
+        }
+
+        for(String review: reviews){
+            if(review.trim().equals("-")) break;
+            else{
+                System.out.println("reviews are not for v1");
+            }
+        }
+
+        if(!nextReviewOn.equals("-")){
+            //LocalDateTime.parse(nextReviewOn);
+            System.out.println("reviews are not for v1");
+        }
+
+        return flashcard;
+    }
+
+    public FlashcardList loadFlashcards() throws FileNotFoundException{
+        FlashcardList flashcardList = new FlashcardList(new ArrayList<>());
+        File f = new File (this.path);
+        Scanner s = new Scanner(f);
+
+        while(s.hasNext()){
+            String[] flashTokens = s.nextLine().split(" \\| ");
+            flashcardList.add(loadFlashcard(flashTokens));
+        }
+
+        return flashcardList;
+
+    }
+
+    public void saveFlashcards(ArrayList<Flashcard> flashcardList) {
+        try {
+            FileWriter fw = new FileWriter(path);
+
+            for (int i = 0; i < flashcardList.size(); i++) {
+                Flashcard flashcard = flashcardList.get(i);
+                fw.write(String.format("%s | %s | - | - | -\r\n",
+                        flashcard.getFrontText(), flashcard.getBackText()));
+            }
+            fw.close();
+        } catch (IOException e){
+            System.out.println("Failed to save.");
+        }
+    }
+}