adding ability to export csv form of either task or wallet

build.gradle

@@ -21,6 +21,7 @@ javafx {
 dependencies  {
     testImplementation 'org.junit.jupiter:junit-jupiter:5.5.0'
     implementation 'com.google.code.gson:gson:2.8.6'
+    compile group: 'com.opencsv', name: 'opencsv', version: '4.1'
 }
 
 application {

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,6 @@
+#Fri Nov 08 15:37:50 SGT 2019
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.5.1-all.zip
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.5.1-bin.zip
-zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME

src/main/java/executor/command/CommandExport.java

@@ -0,0 +1,68 @@
+package executor.command;
+
+import com.opencsv.CSVWriter;
+import duke.exception.DukeException;
+import storage.StorageManager;
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.util.Scanner;
+
+public class CommandExport extends Command {
+
+    private String filePath;
+
+    public CommandExport(String userInput) {
+        this.userInput = userInput;
+        this.commandType = CommandType.EXPORT;
+        this.description = "Exports txt into CSV"
+                            + "FORMAT : export <wallet or task>";
+    }
+
+    @Override
+    public void execute(StorageManager storageManager) {
+
+    }
+
+    public void convertTxtToCsv(String data) throws DukeException {
+        if(data.toLowerCase().equals("wallet")){
+            this.filePath = "savedWallet.txt";
+        } else {
+            this.filePath = "savedTask.txt";
+        }
+        try{
+            File file = new File(this.filePath);
+            Scanner scanner = new Scanner(file);
+            while (scanner.hasNextLine()) {
+                String loadedInput = scanner.nextLine();
+                if (loadedInput.equals("")) {
+                    break;
+                }
+                writeCSV(loadedInput);
+            }
+        } catch (Exception e) {
+            throw new DukeException("No Previously Saved Wallet Data.");
+        }
+    }
+
+
+    private void writeCSV(String line) throws DukeException {
+        // first create file object for file placed at location
+        // specified by filepath
+        File file = new File("data.csv");
+        try {
+            // create FileWriter object with file as parameter
+            FileWriter outputFile = new FileWriter(file);
+            // create CSVWriter object filewriter object as parameter
+            CSVWriter writer = new CSVWriter(outputFile);
+            // add data to csv
+            String[] eachRowOfData = {line.replace(" ", ",")};
+            writer.writeNext(eachRowOfData);
+            // closing writer connection
+            writer.close();
+        }
+        catch (IOException e) {
+            throw new DukeException("Unable to convert txt into csv");
+        }
+    }
+}

src/main/java/executor/command/CommandType.java

@@ -18,6 +18,7 @@ public enum CommandType {
     OUT(CommandAddSpendingReceipt.class),
     SETBALANCE(CommandUpdateBalance.class),
     BUDGET(CommandBudget.class),
+    EXPORT(CommandExport.class),
     EXPENSES(CommandDisplayExpenditure.class),
     HELP(CommandHelp.class),
     DEADLINE(CommandNewTask.class),