StudentSelectionSheet.java

package com.sandftechnologies.schoolmanagementStaff.bottomSheet;

import android.app.Dialog;
import android.support.design.widget.BottomSheetDialogFragment;
import android.support.design.widget.CoordinatorLayout;
import android.support.design.widget.Snackbar;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.TextView;
import android.widget.ViewSwitcher;

import com.sandftechnologies.schoolmanagementStaff.DataCache;
import com.sandftechnologies.schoolmanagementStaff.GsonModels.Response;
import com.sandftechnologies.schoolmanagementStaff.GsonModels.StudentModel;
import com.sandftechnologies.schoolmanagementStaff.GsonModels.studentID;
import com.sandftechnologies.schoolmanagementStaff.Internet.GlobalVariables;
import com.sandftechnologies.schoolmanagementStaff.Internet.NetworkCall;
import com.sandftechnologies.schoolmanagementStaff.Internet.ServerResponseListner;
import com.sandftechnologies.schoolmanagementStaff.R;
import com.sandftechnologies.schoolmanagementStaff.RecyclerViewComponents.StudentSelectionRecyclerAdapter;

import org.json.JSONException;
import org.json.JSONObject;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by PC4 on 8/31/2017.
 */

public class StudentSelectionSheet extends BottomSheetDialogFragment implements ServerResponseListner,GlobalVariables,SelectedStudentChangedListener {

    private List<StudentModel> studentList;
    private List<String> selectedStudents;
    private RecyclerView studentSelectionRecycler;
    private TextView selectionCount;
    private CheckBox selectAll;
    private Button done;
    private ViewSwitcher switcher;
    private DataCache mDataCache;
    private CoordinatorLayout baseLayout;
    private String ClassID,SubjectID;
    private Snackbar loadingStudents_snackbar;
    private StudentSelectionRecyclerAdapter adapter;
    private SelectionCompletedListener selectionDonelistener;

    public void setIDs(String classID, String subjectID) {
        this.ClassID = classID;
        this.SubjectID = subjectID;
    }

    public void setClassID(String classID) {
        this.ClassID = classID;
    }

    public void setSelectionCompletedListener(SelectionCompletedListener listener){
        this.selectionDonelistener=listener;
    }

    @Override
    public void setupDialog(Dialog dialog, int style) {
        super.setupDialog(dialog, style);

        View contentView = View.inflate(getContext(), R.layout.student_selection, null);
        dialog.setContentView(contentView);

        mDataCache=DataCache.getInstance();
        selectedStudents=new ArrayList<>();

        switcher= (ViewSwitcher) contentView.findViewById(R.id.switcher);
        baseLayout= (CoordinatorLayout) dialog.findViewById(R.id.baseLayout);
        studentSelectionRecycler= (RecyclerView) contentView.findViewById(R.id.studentSelectionRecycler);
        done= (Button) contentView.findViewById(R.id.done_button);
        selectAll= (CheckBox) contentView.findViewById(R.id.checkboxSelectAll);
        selectionCount= (TextView) contentView.findViewById(R.id.selectedStudentsCount);

        switcher.setDisplayedChild(0);
        loadingStudents_snackbar=Snackbar.make(baseLayout,"Loading students",Snackbar.LENGTH_INDEFINITE);
        loadingStudents_snackbar.show();
        
        if(mDataCache.getStudentMap().get(ClassID)!=null) {
            studentList=mDataCache.getStudentMap().get(ClassID);
            NetworkCall networkCall = new NetworkCall(TYPE_GET_STUDENTS_OF_SUBJECT);
            networkCall.setListener(StudentSelectionSheet.this);
            networkCall.execute(createSubjectID_JSON(), GET_SUBJECT_DETAILS_URL);
        }else {
            NetworkCall networkCall = new NetworkCall(TYPE_GET_STUDENT_LIST);
            networkCall.setListener(StudentSelectionSheet.this);
            networkCall.execute(createClassID_JSON(), STUDENT_LIST_URL);
        }

        done.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                selectedStudents=adapter.getSelectedIDs();
                getDialog().dismiss();
                selectionDonelistener.onSelectoinCompleted(selectedStudents);
            }
        });

        selectAll.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if(selectAll.isChecked()){
                    adapter.allStudentsSelected();
                }else {
                    if(adapter.getSelectedStudentsCount()==studentList.size()) {
                        adapter.allStudentsUnselected();
                    }
                }
            }
        });
    }

    private String createClassID_JSON() {
        String result="";
        try {
            JSONObject object=new JSONObject();
            object.put("id",ClassID);
            result=object.toString();
        }catch (JSONException e){
            e.printStackTrace();
        }
        return result;
    }

    private String createSubjectID_JSON() {
        String result="";
        try {
            JSONObject object=new JSONObject();
            object.put("id",SubjectID);
            result=object.toString();
        }catch (JSONException e){
            e.printStackTrace();
        }
        return result;
    }

    @Override
    public void onResponse(String type, Response response) throws Exception {

        if(type.equals(TYPE_GET_STUDENTS_OF_SUBJECT)){
            loadingStudents_snackbar.dismiss();
            switcher.setDisplayedChild(1);

            RecyclerView.ItemAnimator itemAnimator=new DefaultItemAnimator();
            RecyclerView.LayoutManager layoutManager=new LinearLayoutManager(getActivity());

            List<studentID> studentIdList=response.getStudentListForSubjectResopnse();
            if(studentIdList.size()==1){
                if(studentIdList.get(0).getStudent_Id().equals("undefined")){
                    //No students opted for this subject
                    studentSelectionRecycler.setLayoutManager( layoutManager );
                    studentSelectionRecycler.setItemAnimator( itemAnimator );
                    adapter=new StudentSelectionRecyclerAdapter(studentList);
                    adapter.setClassID(ClassID);
                    adapter.setSelectedStudentCountChangedListener(StudentSelectionSheet.this);
                    adapter.setSelectedStudents(new ArrayList<String>());
                    studentSelectionRecycler.setHasFixedSize(true);
                    studentSelectionRecycler.setAdapter(adapter);

                }
            }else {
                for (int i=0;i<studentIdList.size();i++){
                    selectedStudents.add(studentIdList.get(i).getStudent_Id());
                }
                studentSelectionRecycler.setLayoutManager( layoutManager );
                studentSelectionRecycler.setItemAnimator( itemAnimator );
                adapter=new StudentSelectionRecyclerAdapter(studentList);
                adapter.setClassID(ClassID);
                adapter.setSelectedStudentCountChangedListener(StudentSelectionSheet.this);
                adapter.setSelectedStudents(selectedStudents);
                studentSelectionRecycler.setHasFixedSize(true);
                studentSelectionRecycler.setAdapter(adapter);

            }
        }else
        if(type.equals(TYPE_GET_STUDENT_LIST)){
            studentList = response.getStudentList();
            mDataCache.addToStudentMap(ClassID,studentList);
            NetworkCall networkCall = new NetworkCall(TYPE_GET_STUDENTS_OF_SUBJECT);
            networkCall.setListener(StudentSelectionSheet.this);
            networkCall.execute(createSubjectID_JSON(), GET_SUBJECT_DETAILS_URL);
        }
    }

    @Override
    public void onNetworkException(Exception e) {
        loadingStudents_snackbar.dismiss();
        Snackbar snackbar=Snackbar.make(baseLayout,"No internet",Snackbar.LENGTH_SHORT);
        snackbar.show();
    }

    @Override
    public void onSelectionCountChanged(int count) {
        selectionCount.setText(String.valueOf(count));
        if(count==studentList.size()){
            selectAll.setChecked(true);
        }else {
            selectAll.setChecked(false);
        }
    }
}