serialization? serialization ;/ ...

src/main/java/Main.java

@@ -49,7 +49,7 @@ public static void main(String[] args) {
         CourseCreationDsGateway course;
         try {
             course = new FileCourse("./courses.csv");
-        } catch (IOException e) {
+        } catch (IOException | ClassNotFoundException e) {
             throw new RuntimeException("Could not create file.");
         }
         CourseCreationOutputBoundary presenter = new CourseCreationPresenter();

src/main/java/course_creation_use_case/CourseCreationInteractor.java

@@ -3,6 +3,8 @@
 // Use case layer
 
 import entities.*;
+import read_write.CourseReadWrite;
+import read_write.TaskReadWrite;
 
 import java.util.ArrayList;
 
@@ -55,6 +57,10 @@ public CourseCreationResponseModel create(CourseCreationRequestModel requestMode
 //            TaskMap.addTask(course.getCourseName() + courseTasks.indexOf(task), task);
         }
 
+        // save course to file
+//        CourseReadWrite crw = new CourseReadWrite("src/data/CourseMap");
+//        CourseMap.saveToFile(trw);
+
         // course sent to presenter
         CourseCreationResponseModel courseResponseModel = new CourseCreationResponseModel(
                 course.getCourseID(), course.getTasks());

src/main/java/entities/Course.java

@@ -1,12 +1,13 @@
 package entities;
 
+import java.io.Serializable;
 import java.util.ArrayList;
 
 /**
  * entity layer
  */
 
-public class Course {
+public class Course implements Serializable {
     /**
      * class for Course entity with private instance variables
      * using StudentUser, InstructorUser, and Task entities

src/main/java/read_write/CourseReadWrite.java

@@ -0,0 +1,58 @@
+package read_write;
+
+import entities.*;
+
+import java.io.*;
+import java.util.ArrayList;
+
+public class CourseReadWrite implements ReadWriter {
+
+    String path;
+
+    public CourseReadWrite(String path) throws IOException, ClassNotFoundException {
+        this.path = path;
+
+        CourseMap courses = buildCourseMap();
+        saveToFile(courses);
+
+        CourseMap courseMap = readFromFile();
+        System.out.println(courseMap);
+        System.out.println(courses);
+    }
+
+    /**
+     * reads in the courseMap from a file (CourseMap.java)
+     * @return the courseMap that is read
+     */
+    public CourseMap readFromFile() throws IOException, ClassNotFoundException {
+        FileInputStream fileReader = new FileInputStream("courses.ser");
+        ObjectInputStream in = new ObjectInputStream(fileReader);
+        CourseMap courseMap = (CourseMap) in.readObject();
+        return courseMap;
+    }
+
+    /**
+     * saves the courseMap to a file (CourseMap.java)
+     * @param courseMap - object to be serialized
+     */
+    public void saveToFile(Object courseMap) throws IOException {
+        FileOutputStream fileWriter = new FileOutputStream("courses.ser");
+        ObjectOutputStream out = new ObjectOutputStream(fileWriter);
+        out.writeObject(courseMap);
+        out.close();
+        fileWriter.close();
+    }
+
+    /**
+     * initialization
+     * @return the courseMap
+     */
+    private static CourseMap buildCourseMap() {
+        ArrayList<String> courseTasks = new ArrayList<String>();
+        courseTasks.add("task1");
+        Course csc207 = new Course("csc207", "paulgries", courseTasks);
+        CourseMap courses = new CourseMap();
+        courses.addCourse("csc207paulgries", csc207);
+        return courses;
+    }
+}

src/main/java/screens/FileCourse.java

@@ -1,165 +1,66 @@
 package screens;
 
 import course_creation_use_case.CourseCreationDsGateway;
-//import course_creation_use_case.courseCreationDsRequestModel;
+import entities.*;
 import course_creation_use_case.CourseCreationRequestModel;
 
-/*
- * Notes:
- * I think for csv file? so columns is what each course entity is? im assuming? idek man
- */
 import java.io.*;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.Map;
 
 public class FileCourse implements CourseCreationDsGateway {
-    private final File csvFile;
-    private final Map<String, Integer> headers = new HashMap<>();
-    private final Map<String, CourseCreationRequestModel> courses = new HashMap<>();
-
-    public FileCourse(String csvPath) throws IOException {
-        csvFile = new File(csvPath);
-
-        headers.put("course_name", 0);
-        headers.put("course_instructor", 1);
-        headers.put("tasks?", 2);
-
-        if (csvFile.length() == 0) {
-            saveCourse();
-        } else {
-
-            BufferedReader reader = new BufferedReader(new FileReader(csvFile));
-            reader.readLine(); // skip the header
-
-            String row;
-            while ((row = reader.readLine()) != null) {
-                String[] col = row.split(",");
-                String courseName = String.valueOf(col[headers.get("courseName")]);
-                String courseInstructor = String.valueOf(col[headers.get("courseInstructor")]);
-                ArrayList<String> tasks = new ArrayList<String>(); // idk what im doing
-//                        /* String.valueOf(col[headers.get("tasks?")]); */
-                CourseCreationRequestModel course = new CourseCreationRequestModel(courseName, courseInstructor, tasks);
-                courses.put(courseName, course);
-            }
-
-            reader.close();
+    /**
+     * is this supposed to be String to Request Model OR String to Course
+     */
+    private final HashMap<String, CourseCreationRequestModel> courses;
+    private final String filePath;
 
-        }
+    /**
+     * reads the Course database file, stores its contents -- HashMap of course id to Course object
+     * @param path -
+     */
+    public FileCourse(String path) throws IOException, ClassNotFoundException {
+        this.courses = readFromFile();
+        this.filePath = path;
+    }
 
+    /**
+     * reads the courseMap from a file
+     * @return -
+     */
+    public HashMap<String, CourseCreationRequestModel> readFromFile() throws IOException, ClassNotFoundException {
+        FileInputStream fileReader = new FileInputStream(this.filePath);
+        ObjectInputStream in = new ObjectInputStream(fileReader);
+        HashMap<String, CourseCreationRequestModel> courseMap = (HashMap<String, CourseCreationRequestModel>) in.readObject();
+        in.close();
+        fileReader.close();
+        return courseMap;
     }
 
     /**
-     * Add requestModel to storage
-     * @param requestModel the user information to save
+     * adds the request model to database
+     * @param requestModel the course info that is being saved
      */
     @Override
     public void saveCourse(CourseCreationRequestModel requestModel) {
-        courses.put(requestModel.getCourseName() ,requestModel);
-        this.saveCourse();
+        courses.put(requestModel.getCourseID(), requestModel);
+//        this.saveCourse();
     }
-
-    private void saveCourse() {
-        BufferedWriter writer;
-        try {
-            writer = new BufferedWriter(new FileWriter(csvFile));
-            writer.write(String.join(",", headers.keySet()));
-            writer.newLine();
-
-            for (CourseCreationRequestModel course : courses.values()) {
-                String line = "%s,%s,%s".format(
-                        course.getCourseName(), course.getCourseInstructor(), course.getTasks());
-                writer.write(line);
-                writer.newLine();
-            }
-
-            writer.close();
-        } catch (IOException e) {
-            throw new RuntimeException(e);
-        }
-
+    private void saveCourse() throws IOException {
+        FileOutputStream fileWriter = new FileOutputStream(filePath);
+        ObjectOutputStream out = new ObjectOutputStream(fileWriter);
+        out.writeObject(courses);
+        out.close();
+        fileWriter.close();
     }
 
     @Override
-    public boolean existsByCourseID(String identifier) {
-        return courses.containsKey(identifier);
+    public boolean existsByCourseID(String courseIdentifier) {
+        return courses.containsKey(courseIdentifier);
     }
 
-}
-
-/*
- * with ds request but apparently not needed so
- */
-//public class FileCourse implements courseCreationDsGateway {
-//    private final File csvFile;
-//    private final Map<String, Integer> headers = new HashMap<>();
-//    private final Map<String, courseCreationDsRequestModel> courses = new HashMap<>();
-//
-//    public FileCourse(String csvPath) throws IOException {
-//        csvFile = new File(csvPath);
-//
-//        headers.put("courseName", 0);
-//        headers.put("course instructor", 1);
-//        headers.put("tasks?", 2);
-//
-//        if (csvFile.length() == 0) {
-//            saveCourse();
-//        } else {
-//
-//            BufferedReader reader = new BufferedReader(new FileReader(csvFile));
-//            reader.readLine(); // skip the header
-//
-//            String row;
-//            while ((row = reader.readLine()) != null) {
-//                String[] col = row.split(",");
-//                String courseName = String.valueOf(col[headers.get("courseName")]);
-//                String courseInstructor = String.valueOf(col[headers.get("courseInstructor")]);
-//                ArrayList<String> tasks = new ArrayList<String>(); // idk what im doing
-////                        /* String.valueOf(col[headers.get("tasks?")]); */
-//                courseCreationDsRequestModel course = new courseCreationDsRequestModel(courseName, courseInstructor, tasks);
-//                courses.put(courseName, course);
-//            }
-//
-//            reader.close();
-//
-//        }
-//
-//    }
-//
-//    /**
-//     * Add requestModel to storage
-//     * @param requestModel the user information to save
-//     */
-//    @Override
-//    public void saveCourse(courseCreationDsRequestModel requestModel) {
-//        courses.put(requestModel.getCourseName() ,requestModel);
-//        this.saveCourse();
-//    }
-//
-//    private void saveCourse() {
-//        BufferedWriter writer;
-//        try {
-//            writer = new BufferedWriter(new FileWriter(csvFile));
-//            writer.write(String.join(",", headers.keySet()));
-//            writer.newLine();
-//
-//            for (courseCreationDsRequestModel course : courses.values()) {
-//                String line = "%s,%s,%s".format(
-//                        course.getCourseName(), course.getCourseInstructor(), course.getTasks());
-//                writer.write(line);
-//                writer.newLine();
-//            }
-//
-//            writer.close();
-//        } catch (IOException e) {
-//            throw new RuntimeException(e);
-//        }
-//
-//    }
-//
-//    @Override
-//    public boolean existsByCourseID(String identifier) {
-//        return courses.containsKey(identifier);
-//    }
-//
-//}
+    public Map<String, CourseCreationRequestModel> getCourses() {
+        return this.courses;
+    }
+}

src/test/java/CourseCreationInteractorTest.java

@@ -0,0 +1,9 @@
+import org.junit.Test;
+
+public class CourseCreationInteractorTest {
+
+    @Test
+    void create() {
+
+    }
+}

src/test/java/CourseUnitTest.java

@@ -8,8 +8,19 @@
 
 public class CourseUnitTest {
 
+
+    /**
+     * Tests needed:
+     *
+     * try catch exceptions:
+     * - name empty, instructor empty, task empty
+     * - course id already in course map
+     * - assertThrows();
+     * or can just do assertFalse(course.____IsValid());
+     */
     @Test
-    void given123Password_whenPasswordIsNotValid_thenIsFalse() {
+
+    void huh() {
         ArrayList<String> task = new ArrayList<String>();
         task.add("task1");
         Course course = new Course("csc207", "paulgries", task);