DDM 20201126

package com.joythis.android.myphonecaller;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Context;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    //data members
    Context mContext;
    ContactDB mDB;
    AmUtil mUtil;
    ArrayList<Contact> mAlContacts; //runtime representation of the contacts managed by the app

    EditText mEtName, mEtNumber;
    Button mBtnInsertContact;
    ListView mLvContacts;
    ArrayAdapter<Contact> mAd;

    Button.OnClickListener mButtonClickHandler =
        new Button.OnClickListener() {
        @Override
        public void onClick(View v) {
            switch(v.getId()){
                case R.id.idBtnInsertContact:
                    actionInsertContact();
                    break;
            }//switch
        }//onClick
    };//mButtonClickHandler

    void actionInsertContact(){
        String strName = mEtName.getText().toString().trim();
        String strNumber = mEtNumber.getText().toString().trim();

        boolean bCheck = strName.length()>0 && strNumber.length()>0;
        if (bCheck){
            Contact c = new Contact(strName, strNumber);
            mDB.insertContact(c);
            //mAlContacts.add(c);
            syncContactsDataWithTheirPresentation();
        }//
        else{
            mUtil.fb("Name and Number can NOT be empty!");
        }
    }//actionInsertContact

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.insert_contact_rl);

        init();
    }//onCreate

    void init(){
        mContext = this;
        mDB = new ContactDB(this);
        mUtil = new AmUtil(this);
        mAlContacts = new ArrayList<>();

        mEtName = findViewById(R.id.idEtName);
        mEtNumber = findViewById(R.id.idEtNumber);
        mBtnInsertContact = findViewById(R.id.idBtnInsertContact);
        mLvContacts = findViewById(R.id.idLvContacts);

        mAd = new ArrayAdapter<>(
            mContext,
            android.R.layout.simple_list_item_1,
            mAlContacts
        );

        mLvContacts.setAdapter(mAd);

        //TODO:
        /*
        layout
        op layout
         */

        mAlContacts = mDB.selectAllContactsByInsertDateDESC();
        syncContactsDataWithTheirPresentation();
    }

    /*
    this method assigns a "menu resource file" to the
    activity's action bar.
     */
    @Override
    public boolean onCreateOptionsMenu(Menu pMenu) {
        MenuInflater minf = this.getMenuInflater();
        if (minf!=null){
            minf.inflate(
                R.menu.sorting_options_menu,//id the XML for the menu
                pMenu //Java ref to assign to the menu
            );
        }//if

        return super.onCreateOptionsMenu(pMenu);
    }//onCreateOptionsMenu

    /*
    here we code what should happen upon the selection of
    any of the menu options
     */
    @Override
    public boolean onOptionsItemSelected(@NonNull MenuItem pMenuItem) {
        switch(pMenuItem.getItemId()){
            case R.id.idMenuItemSortNameAsc:
                actionSortNameAsc();
                break;
            case R.id.idMenuItemSortNameDesc:
                actionSortNameDesc();
                break;
            case R.id.idMenuItemSortNumberAsc:
                actionSortNumberAsc();
                break;
            case R.id.idMenuItemSortNumberDesc:
                actionSortNumberDesc();
                break;
            case R.id.idMenuItemSortInsertDateAsc:
                actionSortInsertDateAsc();
                break;
            case R.id.idMenuItemSortInsertDateDesc:
                actionSortInsertDateDesc();
                break;
        }//switch
        return super.onOptionsItemSelected(pMenuItem);
    }

    void actionSortNameAsc(){
        mAlContacts = mDB.selectAllContactsByNameASC();
        syncContactsDataWithTheirPresentation();
    }

    void actionSortNameDesc(){
        mAlContacts = mDB.selectAllContactsByNameDESC();
        syncContactsDataWithTheirPresentation();
    }

    void actionSortNumberAsc(){
        mAlContacts = mDB.selectAllContactsByNumberASC();
        syncContactsDataWithTheirPresentation();
    }

    void actionSortNumberDesc(){
        mAlContacts = mDB.selectAllContactsByNumberDESC();
        syncContactsDataWithTheirPresentation();
    }

    void actionSortInsertDateAsc(){
        mAlContacts = mDB.selectAllContactsByInsertDateASC();
        syncContactsDataWithTheirPresentation();
    }

    void actionSortInsertDateDesc(){
        mAlContacts = mDB.selectAllContactsByInsertDateDESC();
        syncContactsDataWithTheirPresentation();
    }

    void syncContactsDataWithTheirPresentation(){
        //TODO, it depends on our options for the layout design
        ArrayList<Contact> temp = mDB.selectAllContactsByInsertDateDESC();
        if (temp!=null && temp.size()>0){
            mAlContacts.clear();
            for (Contact c: temp){
                mAlContacts.add(c);
            }//for
        }//if

        mAd.notifyDataSetChanged();
    }
}//MainActivity