piplayercardcreator/cardcreator/src/tutorial/chapter01/SimpleTable.java

package tutorial.chapter01;

import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.util.LinkedList;
import java.util.List;

import com.itextpdf.barcodes.BarcodeQRCode;
import com.itextpdf.io.image.ImageDataFactory;
import com.itextpdf.kernel.colors.ColorConstants;
import com.itextpdf.kernel.geom.PageSize;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfNumber;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.borders.SolidBorder;
import com.itextpdf.layout.element.Cell;
import com.itextpdf.layout.element.Image;
import com.itextpdf.layout.element.Paragraph;
import com.itextpdf.layout.element.Table;
import com.itextpdf.layout.property.TextAlignment;
import com.itextpdf.layout.property.UnitValue;
import com.wrapper.spotify.SpotifyApi;
import com.wrapper.spotify.exceptions.SpotifyWebApiException;
import com.wrapper.spotify.model_objects.credentials.ClientCredentials;
import com.wrapper.spotify.model_objects.specification.Album;
import com.wrapper.spotify.model_objects.specification.Track;
import com.wrapper.spotify.requests.authorization.client_credentials.ClientCredentialsRequest;

public class SimpleTable {

	public static final String[] albums = new String[] {
			"spotify:album:1X2HXE2lAqdmD8VjiBX8Tn",
			"spotify:album:5nCA2mAr3rFzk1A6LZXDYm",
			"spotify:album:1Vc2BZntRGIdv3Ul8AM6cz",
			"spotify:album:0H3rE11E9DrD3j2gEvQJ5R",
			"spotify:album:0YSWLbCg5SpxAb2VOON3mX",
			"spotify:track:7oolFzHipTMg2nL7shhdz2",
			"http://streamtdy.ir-media-tec.com/live/mp3-128/web/play.mp3",
			"hidrive/Kinder/Astrid Lindgren - Lotta zieht um",
			"hidrive/Singles/04 - The Funeral.mp3"
		};
	
	public static final int cardsPerLine = 9;
	public static final boolean retrieveImageFiles = true;

	public static final String DEST = "results/simple_table.pdf";
	public static final PdfNumber INVERTEDPORTRAIT = new PdfNumber(180);
	public static final PdfNumber LANDSCAPE = new PdfNumber(90);
	public static final PdfNumber PORTRAIT = new PdfNumber(0);
	public static final PdfNumber SEASCAPE = new PdfNumber(270);

	private static final String clientId = "d104434912874fbf9ff42e5a91db5179";
	private static final String clientSecret = "6acdb874210942128ba4991c4f7228b5";

	private static final SpotifyApi spotifyApi = new SpotifyApi.Builder().setClientId(clientId)
			.setClientSecret(clientSecret).build();
	private static final ClientCredentialsRequest clientCredentialsRequest = spotifyApi.clientCredentials().build();

	protected List<Card> fetchSpotifyData(String[] links) throws SpotifyWebApiException, IOException {
		List<Card> cards = new LinkedList<Card>();

		for (String link : links) {
			System.out.println(link);
			
			Card card = new Card(link);
			card.qrcode = new BarcodeQRCode(link);
			cards.add(card);

			if (link.startsWith("spotify:album:")) {
				String spotifyId = link.substring(14);
				Album album = spotifyApi.getAlbum(spotifyId).build().execute();
				card.title = album.getName();
				card.artist = album.getArtists()[0].getName();

				URL url = new URL(album.getImages()[0].getUrl());
				card.cover = new Image(ImageDataFactory.create(url));
			}
			else if (link.startsWith("spotify:track:") ) {
				String spotifyId = link.substring(14);
				Track track = spotifyApi.getTrack(spotifyId).build().execute();
				card.title = track.getName();
				card.artist = track.getArtists()[0].getName();
				URL url = new URL(track.getAlbum().getImages()[0].getUrl());
				card.cover = new Image(ImageDataFactory.create(url));
			}
			else if (link.startsWith("http://")) {
				card.title = link;
				card.artist = "";
			}
			else {
				card.title = link;
				card.artist = "";
			}
		}
		
		return cards;
	}

	public static void main(String[] args) throws Exception {
		
		SimpleTable creator = new SimpleTable();
		List<Card> cards;

		try {
			final ClientCredentials clientCredentials = clientCredentialsRequest.execute();

			// Set access token for further "spotifyApi" object usage
			spotifyApi.setAccessToken(clientCredentials.getAccessToken());

			System.out.println("Spotify token expires in: " + clientCredentials.getExpiresIn() + " s");
			
			cards = creator.fetchSpotifyData(albums);
			
			File file = new File(DEST);
			file.getParentFile().mkdirs();

			creator.manipulatePdf(DEST, cards);
			
		} catch (IOException | SpotifyWebApiException e) {
			System.out.println("Error: " + e.getMessage());
		}
	}

	protected void manipulatePdf(String dest, List<Card> cards) throws Exception {
		PdfDocument pdfDoc = new PdfDocument(new PdfWriter(dest));
		pdfDoc.setDefaultPageSize(PageSize.A4.rotate());

		Document doc = new Document(pdfDoc);
		doc.setMargins(0, 0, 0, 0);

		UnitValue[] colWidths = new UnitValue[9];
		for (int i = 0; i < colWidths.length; i++)
			colWidths[i] = new UnitValue(UnitValue.PERCENT, 11.10f);

		Table table = new Table(colWidths);
		table.useAllAvailableWidth();

//		for (int i = 0; i < 17; i++) {
//			table.addCell("hi");
//		}
		
		// TODO
//		if (cardsPerLine < 9) {
//			int i = 0;
//			
//			do {
//				table.addCell("");
//				i++;
//				table.addCell("");
//				i++;
//			} while (cardsPerLine + i < 9);
//		}
		
		for (Card card : cards) {
			Cell cell = new Cell();
			cell.setPadding(0);
			
			Paragraph p = new Paragraph();
			p.setTextAlignment(TextAlignment.CENTER);
			p.setPaddingTop(43.62f);
			Image qrcode = new Image(card.qrcode.createFormXObject(pdfDoc));
			qrcode.setWidth(10 / 25.4f * 72);
			p.add(qrcode);
			cell.add(p);
			
			p = new Paragraph();
			p.setTextAlignment(TextAlignment.CENTER);
			p.setPaddingTop(5 / 25.4f * 72);
			if (card.cover != null) {
				Image cover = card.cover;
				cover.setWidth(30 / 25.4f * 72);
				p.add(cover);
			}
			else {
				p.setPaddingBottom(30 / 25.4f * 72);
			}
			cell.add(p);
			
			p = new Paragraph();
			p.setTextAlignment(TextAlignment.CENTER);
			p.setPaddingTop(5 / 25.4f * 72);
			p.setFontSize(8f);
			p.add(card.artist);
			cell.add(p);
			
			p = new Paragraph();
			p.setTextAlignment(TextAlignment.CENTER);
			p.setPaddingTop(3 / 25.4f * 72);
			p.setFontSize(9f);
			p.setBold();
			p.add(card.title);
			
			cell.setHeight(105 / 25.4f * 72);
			cell.add(p);
			
			cell.setBorder(new SolidBorder(ColorConstants.GRAY, 0.5f, 0.5f));
			table.addCell(cell);
		}

		doc.add(table);
		
		// create backside
//		doc.add(new AreaBreak(AreaBreakType.NEXT_PAGE));


		doc.close();
	}
}

class Card {
	String title;
	String artist;
	BarcodeQRCode qrcode;
	Image cover;
	String link;

	public Card(String link) {
		this.link = link;
	}
}