Proyectos de Subversion Android Microlearning

package com.cesams.twogetskills.activity;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ProgressBar;

import com.cesams.twogetskills.Configuration;
import com.cesams.twogetskills.Constants;
import com.cesams.twogetskills.R;
import com.cesams.twogetskills.library.Functions;
import com.cesams.twogetskills.library.Http;
import com.cesams.twogetskills.library.MD5;
import com.github.barteksc.pdfviewer.PDFView;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Random;
import java.util.TimeZone;

import okhttp3.Cache;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.ConnectionSpec;
import okhttp3.Interceptor;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import okhttp3.logging.HttpLoggingInterceptor;

public class PdfActivity extends AppCompatActivity  {
    private final static String TAG = "C2GS - PdfActivity";
    private static final int BUFFER_SIZE = 4096;
    private File mOutputFile;
    private PDFView mPdfView;
    private ProgressBar mProgressBar;
    private String documentUrl;
    private String deviceId;
    private String password;

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

        documentUrl = getIntent().getStringExtra("documentUrl");
        deviceId = getIntent().getStringExtra("deviceId");
        password = getIntent().getStringExtra("password");

        mPdfView = (PDFView) findViewById(R.id.activity_pdf_document);
        mProgressBar = (ProgressBar ) findViewById(R.id.activity_pdf_progress_bar);

        try {
            TimeZone timeZone = TimeZone.getTimeZone("UTC");
            Calendar calendar = Calendar.getInstance(timeZone);
            TimeZone tz = calendar.getTimeZone();
            int created =  (int) (calendar.getTimeInMillis() / 1000);

            Random random = new Random(created);
            int rand = 1000 + random.nextInt(8999);


            Log.d(TAG, "token = " + deviceId);
            Log.d(TAG, "created = " + created);
            Log.d(TAG, "rand = " + rand);
            Log.d(TAG, "calc = " + password + ':' +  created + ':' + rand);

            String secret = MD5.generar(password + ':' +  created + ':' + rand);

            Log.d(TAG, "secret = " + secret);

            Http http = new Http(getCacheDir(), deviceId, secret, created, rand);
            OkHttpClient client = http.getHttpClient(false);

            Log.d(TAG, "URL = " + documentUrl);
            Request request = new Request.Builder()
                    .url(documentUrl)
                    .build();

            Call call = client.newCall(request);
            call.enqueue(new Callback() {
                public void onResponse(Call call, Response response)
                        throws IOException {

                    File outputDir = getApplication().getCacheDir(); // context being the Activity pointer
                    mOutputFile = File.createTempFile("2getskills", ".pdf", outputDir);

                    mProgressBar.setVisibility(View.VISIBLE);


                    String fileName;
                    String disposition = response.header("Content-Disposition");
                    String contentType = response.header("Content-Type");
                    int contentLength = Functions.Numero2Int(response.header("Content-Length"));

                    System.out.println("Content-Type = " + contentType);
                    System.out.println("Content-Disposition = " + disposition);
                    System.out.println("Content-Length = " + contentLength);




                    // opens input stream from the HTTP connection
                    InputStream inputStream = response.body().byteStream();

                    // opens an output stream to save into file
                    FileOutputStream outputStream = new FileOutputStream(mOutputFile);

                    int bytesRead = -1;
                    byte[] buffer = new byte[BUFFER_SIZE];
                    while ((bytesRead = inputStream.read(buffer)) != -1) {
                        outputStream.write(buffer, 0, bytesRead);

                        Log.d(TAG, "bytesRead = " + bytesRead);
                    }

                    outputStream.close();
                    inputStream.close();


                    mPdfView.fromFile(mOutputFile)
                            .enableSwipe(true) // allows to block changing pages using swipe
                            .swipeHorizontal(false)
                            .enableDoubletap(true)
                            .defaultPage(0)
                            // allows to draw something on the current page, usually visible in the middle of the screen

                            .enableAnnotationRendering(false) // render annotations (such as comments, colors or forms)
                            .password(null)
                            .scrollHandle(null)
                            .enableAntialiasing(true) // improve rendering a little bit on low-res screens
                            // spacing between pages in dp. To define spacing color, set view background
                            .spacing(0)
                            .load();

                }

                public void onFailure(Call call, IOException e) {
                    Log.d(TAG, "Error :  " +  e.getMessage());
                }
            });

            File outputDir = getApplication().getCacheDir(); // context being the Activity pointer
            mOutputFile = File.createTempFile("2getskills", ".pdf", outputDir);

            mProgressBar.setVisibility(View.VISIBLE);

        } catch(Exception e) {
            mOutputFile = null;
        }
    }


    @Override
    public void onBackPressed() {
        if(mOutputFile != null) {
            if(mOutputFile.exists()) {
                mOutputFile.delete();
                mOutputFile = null;
            }
        }

        Intent intent = new Intent();
        intent.putExtra("completed", true);
        intent.putExtra("requestCode", Constants.REQUEST_CODE_PDF);
        setResult(RESULT_OK, intent);
        finish();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();

        if(mOutputFile != null) {
            if(mOutputFile.exists()) {
                mOutputFile.delete();
            }
        }
    }
}