/*

 * Copyright 2009 ZXing authors

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */



package com.ideal.itemid;



import android.app.AlertDialog;

import android.app.Activity;

import android.content.ActivityNotFoundException;

import android.content.DialogInterface;

import android.content.Intent;

import android.net.Uri;



/**

 * <p>

 * A utility class which helps ease integration with Barcode Scanner via

 * {@link Intent}s. This is a simple way to invoke barcode scanning and receive

 * the result, without any need to integrate, modify, or learn the project's

 * source code.

 * </p>

 * <h2>Initiating a barcode scan</h2>

 * <p>

 * Integration is essentially as easy as calling {@link #initiateScan(Activity)}

 * and waiting for the result in your app.

 * </p>

 * <p>

 * It does require that the Barcode Scanner application is installed. The

 * {@link #initiateScan(Activity)} method will prompt the user to download the

 * application, if needed.

 * </p>

 * <p>

 * There are a few steps to using this integration. First, your {@link Activity}

 * must implement the method {@link Activity#onActivityResult(int, int, Intent)}

 * and include a line of code like this:

 * </p>

 * <p>

 * {@code public void onActivityResult(int requestCode, int resultCode, Intent

 * intent) IntentResult scanResult =

 * IntentIntegrator.parseActivityResult(requestCode, resultCode, intent); if

 * (scanResult != null) { // handle scan result } // else continue with any

 * other code you need in the method ... } }

 * </p>

 * <p>

 * This is where you will handle a scan result. Second, just call this in

 * response to a user action somewhere to begin the scan process:

 * </p>

 * <p>

 * {@code IntentIntegrator.initiateScan(yourActivity);}

 * </p>

 * <p>

 * You can use

 * {@link #initiateScan(Activity, CharSequence, CharSequence, CharSequence, CharSequence)}

 * or {@link #initiateScan(Activity, int, int, int, int)} to customize the

 * download prompt with different text labels.

 * </p>

 * <p>

 * Note that {@link #initiateScan(Activity)} returns an {@link AlertDialog}

 * which is non-null if the user was prompted to download the application. This

 * lets the calling app potentially manage the dialog. In particular, ideally,

 * the app dismisses the dialog if it's still active in its

 * {@link Activity#onPause()} method.

 * </p>

 * <h2>Sharing text via barcode</h2>

 * <p>

 * To share text, encoded as a QR Code on-screen, similarly, see

 * {@link #shareText(Activity, CharSequence)}.

 * </p>

 * <p>

 * Some code, particularly download integration, was contributed from the

 * Anobiit application.

 * </p>

 * 

 * @author Sean Owen

 * @author Fred Lin

 * @author Isaac Potoczny-Jones

 * @author Brad Drehmer

 */

public final class IntentIntegrator {



    public static final int REQUEST_CODE = 0x0ba7c0de; // get it?



    public static final String DEFAULT_TITLE = "Install Barcode Scanner?";



    public static final String DEFAULT_MESSAGE = "This application requires Barcode Scanner. Would you like to install it?";



    public static final String DEFAULT_YES = "Yes";



    public static final String DEFAULT_NO = "No";



    // supported barcode formats

    public static final String PRODUCT_CODE_TYPES = "UPC_A,UPC_E,EAN_8,EAN_13";



    public static final String ONE_D_CODE_TYPES = PRODUCT_CODE_TYPES + ",CODE_39,CODE_93,CODE_128";



    public static final String QR_CODE_TYPES = "QR_CODE";



    public static final String ALL_CODE_TYPES = null;



    private IntentIntegrator() {

    }



    /**

     * See

     * {@link #initiateScan(Activity, CharSequence, CharSequence, CharSequence, CharSequence)}

     * -- same, but uses default English labels.

     */

    public static AlertDialog initiateScan(Activity activity) {

        return initiateScan(activity, DEFAULT_TITLE, DEFAULT_MESSAGE, DEFAULT_YES, DEFAULT_NO);

    }



    /**

     * See

     * {@link #initiateScan(Activity, CharSequence, CharSequence, CharSequence, CharSequence)}

     * -- same, but takes string IDs which refer to the {@link Activity}'s

     * resource bundle entries.

     */

    public static AlertDialog initiateScan(Activity activity, int stringTitle, int stringMessage,

            int stringButtonYes, int stringButtonNo) {

        return initiateScan(activity, activity.getString(stringTitle), activity

                .getString(stringMessage), activity.getString(stringButtonYes), activity

                .getString(stringButtonNo));

    }



    /**

     * See

     * {@link #initiateScan(Activity, CharSequence, CharSequence, CharSequence, CharSequence, CharSequence)}

     * -- same, but scans for all supported barcode types.

     * 

     * @param stringTitle title of dialog prompting user to download Barcode

     *            Scanner

     * @param stringMessage text of dialog prompting user to download Barcode

     *            Scanner

     * @param stringButtonYes text of button user clicks when agreeing to

     *            download Barcode Scanner (e.g. "Yes")

     * @param stringButtonNo text of button user clicks when declining to

     *            download Barcode Scanner (e.g. "No")

     * @return an {@link AlertDialog} if the user was prompted to download the

     *         app, null otherwise

     */

    public static AlertDialog initiateScan(Activity activity, CharSequence stringTitle,

            CharSequence stringMessage, CharSequence stringButtonYes, CharSequence stringButtonNo) {



        return initiateScan(activity, stringTitle, stringMessage, stringButtonYes, stringButtonNo,

                ALL_CODE_TYPES);

    }



    /**

     * Invokes scanning.

     * 

     * @param stringTitle title of dialog prompting user to download Barcode

     *            Scanner

     * @param stringMessage text of dialog prompting user to download Barcode

     *            Scanner

     * @param stringButtonYes text of button user clicks when agreeing to

     *            download Barcode Scanner (e.g. "Yes")

     * @param stringButtonNo text of button user clicks when declining to

     *            download Barcode Scanner (e.g. "No")

     * @param stringDesiredBarcodeFormats a comma separated list of codes you

     *            would like to scan for.

     * @return an {@link AlertDialog} if the user was prompted to download the

     *         app, null otherwise

     * @throws InterruptedException if timeout expires before a scan completes

     */

    public static AlertDialog initiateScan(Activity activity, CharSequence stringTitle,

            CharSequence stringMessage, CharSequence stringButtonYes, CharSequence stringButtonNo,

            CharSequence stringDesiredBarcodeFormats) {

        Intent intentScan = new Intent("com.google.zxing.client.android.SCAN");

        intentScan.addCategory(Intent.CATEGORY_DEFAULT);



        // check which types of codes to scan for

        if (stringDesiredBarcodeFormats != null) {

            // set the desired barcode types

            intentScan.putExtra("SCAN_FORMATS", stringDesiredBarcodeFormats);

        }



        try {

            activity.startActivityForResult(intentScan, REQUEST_CODE);

            return null;

        } catch (ActivityNotFoundException e) {

            return showDownloadDialog(activity, stringTitle, stringMessage, stringButtonYes,

                    stringButtonNo);

        }

    }



    private static AlertDialog showDownloadDialog(final Activity activity,

            CharSequence stringTitle, CharSequence stringMessage, CharSequence stringButtonYes,

            CharSequence stringButtonNo) {

        AlertDialog.Builder downloadDialog = new AlertDialog.Builder(activity);

        downloadDialog.setTitle(stringTitle);

        downloadDialog.setMessage(stringMessage);

        downloadDialog.setPositiveButton(stringButtonYes, new DialogInterface.OnClickListener() {

            public void onClick(DialogInterface dialogInterface, int i) {

                Uri uri = Uri.parse("market://search?q=pname:com.google.zxing.client.android");

                Intent intent = new Intent(Intent.ACTION_VIEW, uri);

                activity.startActivity(intent);

            }

        });

        downloadDialog.setNegativeButton(stringButtonNo, new DialogInterface.OnClickListener() {

            public void onClick(DialogInterface dialogInterface, int i) {

            }

        });

        return downloadDialog.show();

    }



    /**

     * <p>

     * Call this from your {@link Activity}'s

     * {@link Activity#onActivityResult(int, int, Intent)} method.

     * </p>

     * 

     * @return null if the event handled here was not related to

     *         {@link IntentIntegrator}, or else an {@link IntentResult}

     *         containing the result of the scan. If the user cancelled

     *         scanning, the fields will be null.

     */

    public static IntentResult parseActivityResult(int requestCode, int resultCode, Intent intent) {

        if (requestCode == REQUEST_CODE) {

            if (resultCode == Activity.RESULT_OK) {

                String contents = intent.getStringExtra("SCAN_RESULT");

                String formatName = intent.getStringExtra("SCAN_RESULT_FORMAT");

                return new IntentResult(contents, formatName);

            } else {

                return new IntentResult(null, null);

            }

        }

        return null;

    }



    /**

     * See

     * {@link #shareText(Activity, CharSequence, CharSequence, CharSequence, CharSequence, CharSequence)}

     * -- same, but uses default English labels.

     */

    public static void shareText(Activity activity, CharSequence text) {

        shareText(activity, text, DEFAULT_TITLE, DEFAULT_MESSAGE, DEFAULT_YES, DEFAULT_NO);

    }



    /**

     * See

     * {@link #shareText(Activity, CharSequence, CharSequence, CharSequence, CharSequence, CharSequence)}

     * -- same, but takes string IDs which refer to the {@link Activity}'s

     * resource bundle entries.

     */

    public static void shareText(Activity activity, CharSequence text, int stringTitle,

            int stringMessage, int stringButtonYes, int stringButtonNo) {

        shareText(activity, text, activity.getString(stringTitle), activity

                .getString(stringMessage), activity.getString(stringButtonYes), activity

                .getString(stringButtonNo));

    }



    /**

     * Shares the given text by encoding it as a barcode, such that another user

     * can scan the text off the screen of the device.

     * 

     * @param text the text string to encode as a barcode

     * @param stringTitle title of dialog prompting user to download Barcode

     *            Scanner

     * @param stringMessage text of dialog prompting user to download Barcode

     *            Scanner

     * @param stringButtonYes text of button user clicks when agreeing to

     *            download Barcode Scanner (e.g. "Yes")

     * @param stringButtonNo text of button user clicks when declining to

     *            download Barcode Scanner (e.g. "No")

     */

    public static void shareText(Activity activity, CharSequence text, CharSequence stringTitle,

            CharSequence stringMessage, CharSequence stringButtonYes, CharSequence stringButtonNo) {



        Intent intent = new Intent();

        intent.setAction("com.google.zxing.client.android.ENCODE");

        intent.putExtra("ENCODE_TYPE", "TEXT_TYPE");

        intent.putExtra("ENCODE_DATA", text);

        try {

            activity.startActivity(intent);

        } catch (ActivityNotFoundException e) {

            showDownloadDialog(activity, stringTitle, stringMessage, stringButtonYes,

                    stringButtonNo);

        }

    }



}