Shared preferences and validation

app/build.gradle

@@ -46,6 +46,9 @@ dependencies {
     implementation 'com.android.support:cardview-v7:27.0.2'
     implementation 'com.android.support:support-v4:27.0.2'
     compile 'com.android.support.constraint:constraint-layout:1.1.0-beta4'
+    compile 'com.squareup.retrofit2:retrofit:2.1.0'
+    compile 'com.google.code.gson:gson:2.6.2'
+    compile 'com.squareup.retrofit2:converter-gson:2.1.0'
     implementation 'com.android.support:design:27.0.2'
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'com.android.support.test:runner:1.0.1'

app/src/main/AndroidManifest.xml

@@ -2,6 +2,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
   package="com.djunicode.queuingapp">
 
+  <uses-permission android:name="android.permission.INTERNET"/>
+
   <supports-screens
     android:anyDensity="true"
     android:largeScreens="true"

app/src/main/java/com/djunicode/queuingapp/activity/LogInActivity.java

@@ -23,10 +23,18 @@
 import android.widget.Toast;
 import com.djunicode.queuingapp.R;
 import com.djunicode.queuingapp.SessionManagement.SessionManager;
+import com.djunicode.queuingapp.customClasses.HashingPassword;
 import com.djunicode.queuingapp.fragment.FindTeacherFragment;
 import com.djunicode.queuingapp.fragment.LogInStudentFragment;
 import com.djunicode.queuingapp.fragment.LogInTeacherFragment;
 import com.djunicode.queuingapp.fragment.SignUpTeacherFragment;
+import com.djunicode.queuingapp.model.Student;
+import com.djunicode.queuingapp.model.StudentForId;
+import com.djunicode.queuingapp.rest.ApiClient;
+import com.djunicode.queuingapp.rest.ApiInterface;
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
 
 public class LogInActivity extends AppCompatActivity {
 
@@ -36,12 +44,16 @@ public class LogInActivity extends AppCompatActivity {
   private Spinner departmentSpinner, yearSpinner, batchSpinner;
   private TextView logInStudentTextView, logInTeacherTextView, signUpTeacherTextView;
   private CardView signUpStudentButton;
+  private String username, department, year, batch, SAPId, password; //Student's data to be send to server
   private TextInputLayout studentSignUpinputLayoutUsername, studentSignUpinputLayoutSAPId,
       studentSignUpinputLayoutPassword, studentSignUpinputLayoutDepartment,
       studentSignUpinputLayoutYear, batchSpinnerLayout;
   private SharedPreferences sp_student, sp_teacher;
   // Session Manager Class
   SessionManager session;
+  ApiInterface apiInterface;
+  private String salt, intermediate_password, hashed_password;
+  int idFromServer;
 
   @Override
   protected void onCreate(Bundle savedInstanceState) {
@@ -64,18 +76,14 @@ protected void onCreate(Bundle savedInstanceState) {
     logInTeacherTextView = (TextView) findViewById(R.id.logInTeacherTextView);
     signUpTeacherTextView = (TextView) findViewById(R.id.signUpTeacherTextView);
     signUpStudentButton = (CardView) findViewById(R.id.signUpStudentButton);
+    apiInterface = ApiClient.getClient().create(ApiInterface.class);
 
     //studentSignUpinputLayoutUsername.setError(getString(R.string.err_msg_username));
-
-    String username = usernameEditText.getText().toString();
-    String sapID = sapIDEditText.getText().toString();
-    String password = passwordEditText.getText().toString();
     sp_student = getSharedPreferences("Student",MODE_PRIVATE);
     sp_teacher = getSharedPreferences("Teacher",MODE_PRIVATE);
 
-    // To remove Locally stored variables remove the below comment
 
-    /*Editor editor_student = sp_student.edit();
+    Editor editor_student = sp_student.edit();
     Editor editor_teacher = sp_teacher.edit();
 
     editor_student.remove("student_username");
@@ -84,7 +92,7 @@ protected void onCreate(Bundle savedInstanceState) {
 
     editor_teacher.remove("teacher_username");
     editor_teacher.remove("teacher_password");
-    editor_teacher.commit();*/
+    editor_teacher.commit();
 
     //if SharedPreferences contains username and password then redirect to Home activity
     if(sp_student.contains("student_username") && sp_student.contains("student_password")){
@@ -97,7 +105,7 @@ protected void onCreate(Bundle savedInstanceState) {
 
       if(sp_teacher.contains("teacher_username") && sp_teacher.contains("teacher_password")){
         Toast.makeText(getApplicationContext(), "I got it!", Toast.LENGTH_SHORT).show();
-        Intent in = new Intent(this, TeacherScreenActivity.class);
+        Intent in = new Intent(this, StudentScreenActivity.class);
         // StudentScreenActivity just for demo till the time teacher fragments are not ready
         startActivity(in);
 
@@ -198,6 +206,14 @@ public void onClick(View v) {
       @Override
       public void onClick(View v) {
         if (validSignUp()) {
+          username = usernameEditText.getText().toString();
+          department = departmentSpinner.getSelectedItem().toString();
+          year = yearSpinner.getSelectedItem().toString();
+          batch = batchSpinner.getSelectedItem().toString();
+          SAPId = sapIDEditText.getText().toString();
+          password = passwordEditText.getText().toString();
+          hash_password(password); //Hash the password before sending it to the server
+          getIdForStudentFromUser();
           session.createLoginSession(usernameEditText.getText().toString(),
               passwordEditText.getText().toString());
           Intent intent = new Intent(LogInActivity.this, StudentScreenActivity.class);
@@ -225,6 +241,10 @@ private Boolean validSignUp () {
       return false;
     }
 
+    if (!validateBatch()) {
+      return false;
+    }
+
     if (!validateSAPId()) {
       return false;
     }
@@ -308,11 +328,63 @@ private boolean validateYear() {
     }
   }
 
+  private boolean validateBatch() {
+    if(batchSpinner.getSelectedItemPosition() == 0) {
+      batchSpinnerLayout.setError(getString(R.string.err_msg_batch));
+      return false;
+    }
+    else {
+      batchSpinnerLayout.setError("");
+      return true;
+    }
+  }
+
   private void requestFocus(View view) {
     if (view.requestFocus()) {
       getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
     }
   }
 
+  private void sendDataToServer(int id) {
+    Log.i("id", Integer.toString(id));
+    Call<Student> call = apiInterface.createStudentAccount(id, username, SAPId, department, year, batch);
+    call.enqueue(new Callback<Student>() {
+      @Override
+      public void onResponse(Call<Student> call, Response<Student> response) {
+//        Log.i("student", response.body().toString());
+      }
+
+      @Override
+      public void onFailure(Call<Student> call, Throwable t) {
+
+      }
+    });
+  }
+
+  private void hash_password (String password) {
+
+    HashingPassword hashingPassword = new HashingPassword();
+    salt = hashingPassword.generate_salt();
+    intermediate_password = password + salt;
+    hashed_password = hashingPassword.hash_the_password(intermediate_password);
+  }
+
+  private void getIdForStudentFromUser () {
+    Call<StudentForId> call = apiInterface.getId(username, hashed_password);
+    call.enqueue(new Callback<StudentForId>() {
+      @Override
+      public void onResponse(Call<StudentForId> call, Response<StudentForId> response) {
+        Log.i("idFromServer", Integer.toString(response.body().getId()));
+        sendDataToServer(response.body().getId());
+
+      }
+
+      @Override
+      public void onFailure(Call<StudentForId> call, Throwable t) {
+
+      }
+    });
+
+  }
 
-}
+}

app/src/main/java/com/djunicode/queuingapp/customClasses/HashingPassword.java

@@ -0,0 +1,52 @@
+package com.djunicode.queuingapp.customClasses;
+
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+/**
+ * Created by DELL_PC on 23-01-2018.
+ */
+
+public class HashingPassword {
+
+  private static final String ALPHA_NUMERIC_STRING = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
+  public String generate_salt() {
+    int count = 16;
+    StringBuilder builder = new StringBuilder();
+    while (count-- != 0) {
+      int character = (int)(Math.random()*ALPHA_NUMERIC_STRING.length());
+      builder.append(ALPHA_NUMERIC_STRING.charAt(character));
+    }
+    return builder.toString();
+  }
+
+  public String hash_the_password(String input) {
+    StringBuilder hash = new StringBuilder();
+
+    try {
+      MessageDigest sha = MessageDigest.getInstance("SHA-1");
+      byte[] hashedBytes = sha.digest(input.getBytes());
+      char[] digits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+          'a', 'b', 'c', 'd', 'e', 'f' };
+      for (int idx = 0; idx < hashedBytes.length; ++idx) {
+        byte b = hashedBytes[idx];
+        hash.append(digits[(b & 0xf0) >> 4]);
+        hash.append(digits[b & 0x0f]);
+      }
+    } catch (NoSuchAlgorithmException e) {
+      // handle error here.
+    }
+
+    return hash.toString();
+  }
+
+  public boolean isExpectedPassword(String password, String salt, String expectedHash) {
+    String fina = password + salt;
+    String s = hash_the_password(fina);
+    if(s.equals(expectedHash))
+      return true;
+    else
+      return false;
+  }
+
+}

app/src/main/java/com/djunicode/queuingapp/customClasses/TeacherTimerTask.java

@@ -0,0 +1,38 @@
+package com.djunicode.queuingapp.customClasses;
+
+import android.util.Log;
+import com.djunicode.queuingapp.model.LocationTeacher;
+import com.djunicode.queuingapp.rest.ApiClient;
+import com.djunicode.queuingapp.rest.ApiInterface;
+import java.util.TimerTask;
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+
+/**
+ * Created by DELL_PC on 23-01-2018.
+ */
+
+public class TeacherTimerTask extends TimerTask{
+
+  ApiInterface apiInterface = ApiClient.getClient().create(ApiInterface.class);
+  int i = 19;
+
+  @Override
+  public void run() {
+
+    Call<LocationTeacher> call = apiInterface.deleteTeacherLocation(i);
+    call.enqueue(new Callback<LocationTeacher>() {
+      @Override
+      public void onResponse(Call<LocationTeacher> call, Response<LocationTeacher> response) {
+        Log.i("Info", "Deleted");
+      }
+
+      @Override
+      public void onFailure(Call<LocationTeacher> call, Throwable t) {
+        Log.i("Info", "Deletion failed");
+      }
+    });
+
+  }
+}

app/src/main/java/com/djunicode/queuingapp/fragment/FindTeacherFragment.java

@@ -7,6 +7,7 @@
 import android.os.Bundle;
 import android.support.v4.app.Fragment;
 import android.support.v7.widget.CardView;
+import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.View.OnClickListener;
@@ -19,6 +20,12 @@
 import android.widget.Toast;
 import com.djunicode.queuingapp.R;
 import com.djunicode.queuingapp.activity.SightedTeacherActivity;
+import com.djunicode.queuingapp.model.LocationTeacher;
+import com.djunicode.queuingapp.rest.ApiClient;
+import com.djunicode.queuingapp.rest.ApiInterface;
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
 
 /**
  * A simple {@link Fragment} subclass.
@@ -27,6 +34,8 @@ public class FindTeacherFragment extends Fragment {
 
   private Spinner subjectSpinner, teacherSpinner;
   private CardView findTeacherButton, sightedTeacherButton;
+  ApiInterface apiInterface;
+
 
   public FindTeacherFragment() {
     // Required empty public constructor
@@ -46,6 +55,7 @@ public View onCreateView(LayoutInflater inflater, ViewGroup container,
     teacherSpinner = (Spinner) view.findViewById(R.id.teacherSpinner);
     findTeacherButton = (CardView) view.findViewById(R.id.findTeacherButton);
     sightedTeacherButton = (CardView) view.findViewById(R.id.sightedTeacherButton);
+    apiInterface = ApiClient.getClient().create(ApiInterface.class);
 
     ArrayAdapter<String> adapter = new ArrayAdapter<String>(getContext(),
         android.R.layout.simple_spinner_dropdown_item, array);
@@ -74,16 +84,52 @@ public void onNothingSelected(AdapterView<?> parent) {
     findTeacherButton.setOnClickListener(new OnClickListener() {
       @Override
       public void onClick(View v) {
-        if(teacherSpinner.getSelectedItemPosition() != 0){
+        /*if(teacherSpinner.getSelectedItemPosition() != 0){
           String location = "Prof. " + teacherSpinner.getSelectedItem().toString() +
               " is in the staff lounge.";
           AlertDialog.Builder builder = new Builder(getActivity());
           builder.setMessage(location)
               .setPositiveButton("OK", null)
               .show();
         }
+        else
+          Toast.makeText(getContext(), "Please Select a teacher!", Toast.LENGTH_SHORT).show();*/
+        if(teacherSpinner.getSelectedItemPosition() != 0) {
+          int i = 22;
+          Call<LocationTeacher> call = apiInterface.getTeacherLocation(i);
+          call.enqueue(new Callback<LocationTeacher>() {
+            @Override
+            public void onResponse(Call<LocationTeacher> call, Response<LocationTeacher> response) {
+            /*Log.i("Id", response.body().getId().toString());
+            Log.i("Floor", response.body().getFloor().toString());
+            Log.i("Department", response.body().getDepartment());
+            Log.i("Room", response.body().getRoom());
+            Log.i("Updated At", response.body().getUpdated_at());*/
+              String location =  "Prof. " + teacherSpinner.getSelectedItem().toString() +
+                  "is at " + response.body().getFloor().toString() + "floor's " + response.body().getDepartment()
+                  + "department and " + response.body().getRoom() + "room.";
+              AlertDialog.Builder builder = new Builder(getActivity());
+              builder.setMessage(location)
+                  .setPositiveButton("OK", null)
+                  .show();
+            }
+
+            @Override
+            public void onFailure(Call<LocationTeacher> call, Throwable t) {
+              if(t != null) {
+                Log.i("info: ", t.getMessage());
+              }
+              else {
+                Log.i("info: ", "failed");
+              }
+            }
+          });
+
+        }
+
         else
           Toast.makeText(getContext(), "Please Select a teacher!", Toast.LENGTH_SHORT).show();
+
       }
     });
 
@@ -97,4 +143,4 @@ public void onClick(View v) {
 
     return view;
   }
-}
+}

app/src/main/java/com/djunicode/queuingapp/fragment/LogInStudentFragment.java

@@ -126,7 +126,7 @@ private boolean validatePassword() {
   }
 
   private boolean validMatch() {
-    if(sapIdLogInEditText.getText().toString().equals("dhruv") &&
+    if(sapIdLogInEditText.getText().toString().equals("60004160006") &&
         passwordLogInEditText.getText().toString().equals("demopass")) {
 
       return true;

app/src/main/java/com/djunicode/queuingapp/fragment/LogInTeacherFragment.java

@@ -120,7 +120,7 @@ private boolean validatePassword() {
   }
 
   private boolean validMatch() {
-    if(sapIdLogInTeacherEditText.getText().toString().equals("dhruv") &&
+    if(sapIdLogInTeacherEditText.getText().toString().equals("60004160006") &&
         passwordLogInTeacherEditText.getText().toString().equals("demopass")) {
 
       return true;