added models and some TODOs

app/src/main/AndroidManifest.xml

@@ -48,7 +48,7 @@
 			android:name=".features.dashboard.settings.SettingsActivity"
 			android:label="@string/title_activity_settings"
 			android:parentActivityName=".features.dashboard.MainActivity"/>
-		<activity android:name=".features.flashcards.TrainingSubjectActivity"></activity>
+		<activity android:name=".features.training.TrainingSubjectActivity"></activity>
 	</application>
 
 </manifest>
\ No newline at end of file

app/src/main/java/de/akamu/tudarmstadt/api/V2APISubject.java

+package de.akamu.tudarmstadt.api;
+
+import android.util.ArrayMap;
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import de.akamu.tudarmstadt.exceptions.AkamuAPIException;
+import de.akamu.tudarmstadt.model.CourseSubject;
+
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+
+public final class V2APISubject {
+
+    public static List<CourseSubject> getAllCourseSubjects(int courseId) throws IOException, AkamuAPIException {
+        Map<String, String> parameters = new ArrayMap<>(1);
+        parameters.put("author", Integer.toString(courseId));
+        String response = V2API.get("course/subject", parameters);
+
+        Gson gsonBuilder = new GsonBuilder().create();
+        CourseSubject[] subjects = gsonBuilder.fromJson(response, CourseSubject[].class);
+        return Arrays.asList(subjects);
+    }
+
+}

app/src/main/java/de/akamu/tudarmstadt/data/training/TrainingDataSource.kt

+package de.akamu.tudarmstadt.data.training
+
+import de.akamu.tudarmstadt.model.Course
+
+interface TrainingDataSource {
+
+    interface FetchAllCoursesCallback {
+        fun onFetchAllCoursesSuccess(courses: ArrayList<Course>)
+        fun onFetchAllCoursesFailed(reason: String)
+    }
+
+    fun fetchTrainingSubjects(callback: FetchAllCoursesCallback)
+
+}
\ No newline at end of file

app/src/main/java/de/akamu/tudarmstadt/data/training/TrainingDataSourceImpl.kt

+package de.akamu.tudarmstadt.data.training
+
+import android.os.AsyncTask
+import de.akamu.tudarmstadt.model.Course
+
+class TrainingDataSourceImpl : TrainingDataSource {
+
+    override fun fetchTrainingSubjects(callback: TrainingDataSource.FetchAllCoursesCallback) {
+
+    }
+
+    class FetchTrainingSubjectsTask(var callback: TrainingDataSource.FetchAllCoursesCallback)
+        : AsyncTask<Void, Void, Boolean>() {
+
+        var courses : List<Course> = ArrayList()
+        private var errorMessage : String = "Oops. Something went wrong..."
+
+        override fun doInBackground(vararg params: Void?): Boolean{
+            return try {
+                // TODO: fetch Courses
+                true
+            } catch (e : Exception) {
+                e.printStackTrace()
+                errorMessage = e.message!!
+                false
+            }
+        }
+
+        override fun onPostExecute(success: Boolean?) {
+            if(success!!) {
+                callback.onFetchAllCoursesSuccess(ArrayList(courses))
+            } else {
+                callback.onFetchAllCoursesFailed(errorMessage)
+            }
+        }
+    }
+
+}
\ No newline at end of file

app/src/main/java/de/akamu/tudarmstadt/features/dashboard/GameModeFragment.kt

@@ -8,6 +8,7 @@ import android.view.ViewGroup
 import android.widget.ImageButton
 import androidx.fragment.app.Fragment
 import de.akamu.tudarmstadt.R
+import de.akamu.tudarmstadt.features.training.TrainingSubjectActivity
 import de.akamu.tudarmstadt.features.friends.FriendsListActivity
 import kotlinx.android.synthetic.main.fragment_game_mode.*
 
@@ -27,10 +28,16 @@ class GameModeFragment : Fragment(), View.OnClickListener {
     override fun onClick(v: View?) {
         if(v!!.id == imageButton_challenge_classic.id) {
             navigateToFriendsListActivity()
+        } else if (v.id == imageButton_challenge_training.id) {
+            navigateToTrainingSubjectActivity()
         }
     }
 
     fun navigateToFriendsListActivity() {
         startActivity(Intent(this.context, FriendsListActivity::class.java))
     }
+
+    fun navigateToTrainingSubjectActivity() {
+        startActivity(Intent(this.context, TrainingSubjectActivity::class.java))
+    }
 }
\ No newline at end of file

app/src/main/java/de/akamu/tudarmstadt/features/flashcards/TrainingSubjectActivity.kt → app/src/main/java/de/akamu/tudarmstadt/features/training/TrainingSubjectActivity.kt

-package de.akamu.tudarmstadt.features.flashcards
+package de.akamu.tudarmstadt.features.training
 
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
 import de.akamu.tudarmstadt.R
 import de.akamu.tudarmstadt.model.Subject
 
-class TrainingSubjectActivity : AppCompatActivity() {
+class TrainingSubjectActivity :
+    AppCompatActivity(),
+    TrainingSubjectContract.View {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -14,7 +16,7 @@ class TrainingSubjectActivity : AppCompatActivity() {
         // fetchSubjects()
     }
 
-    fun bindSubjectAdapter(subjects: ArrayList<Subject>) {
+    override fun bindSubjectAdapter(subjects: ArrayList<Subject>) {
 
     }
 }

app/src/main/java/de/akamu/tudarmstadt/features/flashcards/TrainingSubjectAdapter.kt → app/src/main/java/de/akamu/tudarmstadt/features/training/TrainingSubjectAdapter.kt

-package de.akamu.tudarmstadt.features.flashcards
+package de.akamu.tudarmstadt.features.training
 
 import android.view.LayoutInflater
 import android.view.View

app/src/main/java/de/akamu/tudarmstadt/features/training/TrainingSubjectContract.kt

+package de.akamu.tudarmstadt.features.training
+
+import de.akamu.tudarmstadt.model.Subject
+
+interface TrainingSubjectContract {
+
+    interface View {
+        fun bindSubjectAdapter(subjects: ArrayList<Subject>)
+    }
+
+    interface Presenter {
+        fun fetchSubjects()
+    }
+
+}
\ No newline at end of file

app/src/main/java/de/akamu/tudarmstadt/features/training/TrainingSubjectInteractor.kt

+package de.akamu.tudarmstadt.features.training
+
+import de.akamu.tudarmstadt.data.training.TrainingDataSource
+import de.akamu.tudarmstadt.data.training.TrainingDataSourceImpl
+
+class TrainingSubjectInteractor (private val dataSource: TrainingDataSourceImpl) : TrainingDataSource {
+    override fun fetchTrainingSubjects(callback: TrainingDataSource.FetchAllCoursesCallback) {
+        //TODO: implement when available from server side
+    }
+
+}
\ No newline at end of file

app/src/main/java/de/akamu/tudarmstadt/features/training/TrainingSubjectPresenter.kt

+package de.akamu.tudarmstadt.features.training
+
+class TrainingSubjectPresenter(var interactor: TrainingSubjectInteractor, var view: TrainingSubjectContract.View)
+    : TrainingSubjectContract.Presenter {
+
+    override fun fetchSubjects() {
+        interactor
+    }
+
+}
\ No newline at end of file

app/src/main/java/de/akamu/tudarmstadt/model/Course.java

+package de.akamu.tudarmstadt.model;
+
+public class Course {
+
+    private int id;
+    private String name;
+    private String shortForm;
+    /** Department like FBxx at TU Darmstadt. */
+    private String departement;
+    /** Name of the university this course is offered at. */
+    private String university;
+    /** Brief description of what this course is about. */
+    private String description;
+
+    public Course(int id, String name, String shortForm, String departement, String university, String description) {
+        this.id = id;
+        this.name = name;
+        this.shortForm = shortForm;
+        this.departement = departement;
+        this.university = university;
+        this.description = description;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getShortForm() {
+        return shortForm;
+    }
+
+    public void setShortForm(String shortForm) {
+        this.shortForm = shortForm;
+    }
+
+    public String getDepartement() {
+        return departement;
+    }
+
+    public void setDepartement(String departement) {
+        this.departement = departement;
+    }
+
+    public String getUniversity() {
+        return university;
+    }
+
+    public void setUniversity(String university) {
+        this.university = university;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+}

app/src/main/java/de/akamu/tudarmstadt/model/CourseSubject.java

+package de.akamu.tudarmstadt.model;
+
+public class CourseSubject {
+
+    private Course course;
+    private Subject subject;
+    private int semester;
+
+    public CourseSubject(Course course, Subject subject, int semester) {
+        this.course = course;
+        this.subject = subject;
+        this.semester = semester;
+    }
+
+    public Course getCourse() {
+        return course;
+    }
+
+    public void setCourse(Course course) {
+        this.course = course;
+    }
+
+    public Subject getSubject() {
+        return subject;
+    }
+
+    public void setSubject(Subject subject) {
+        this.subject = subject;
+    }
+
+    public int getSemester() {
+        return semester;
+    }
+
+    public void setSemester(int semester) {
+        this.semester = semester;
+    }
+}

app/src/main/res/layout/activity_training_subject.xml

@@ -4,7 +4,7 @@
                                                    xmlns:tools="http://schemas.android.com/tools"
                                                    android:layout_width="match_parent"
                                                    android:layout_height="match_parent"
-                                                   tools:context=".features.flashcards.TrainingSubjectActivity">
+                                                   tools:context=".features.training.TrainingSubjectActivity">
 
 	<androidx.constraintlayout.widget.ConstraintLayout
 		android:layout_width="match_parent"