added the xkcd downloader project to the repo and reorderd repo directories

xkcd_downloader/.settings/org.eclipse.jdt.core.prefs

@@ -0,0 +1,11 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.8

xkcd_downloader/src/org/kuchelmeister/xkcd/downloader/ImageDownloader.java

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+package org.kuchelmeister.xkcd.downloader;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.LinkedList;
+import java.util.List;
+
+public class ImageDownloader {
+
+	List<String> downloadedImages;
+
+	public ImageDownloader() {
+		downloadedImages = new LinkedList<>();
+	}
+
+	private void downloadImage(final String url, final String folderPath) throws IOException {
+		final InputStream in = new URL(url).openStream();
+		final String fileName = url.substring(url.lastIndexOf("/")).replaceAll("[^A-Za-z0-9.]", "");
+
+		downloadedImages.add(folderPath + fileName);
+
+		Files.copy(in, Paths.get(folderPath + fileName));
+
+		System.out.println("Saved: " + folderPath + fileName);
+	}
+
+	public void downloadAllImages(final List<String> images, final String folderPath) {
+		for (final String img : images) {
+			try {
+				this.downloadImage(img, folderPath);
+			} catch (final IOException e) {
+				e.printStackTrace();
+				return;
+			}
+		}
+	}
+}

xkcd_downloader/src/org/kuchelmeister/xkcd/downloader/ImageFinder.java

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+package org.kuchelmeister.xkcd.downloader;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.net.URL;
+import java.nio.charset.Charset;
+import java.util.LinkedList;
+import java.util.List;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+public class ImageFinder {
+	public static final String NUM_REPLACE = "<number>";
+	public static final String XKCD_URL = "https://xkcd.com/" + NUM_REPLACE + "/info.0.json";
+
+	/**
+	 * Number of tries until fetching is aborted
+	 */
+	public static final int ABORT_THRESHOLD = 10;
+
+	private final List<String> imageURLs;
+
+	public ImageFinder() {
+		this.imageURLs = new LinkedList<>();
+	}
+
+	public void findImages() {
+		int err_counter = 0;
+		int counter = 1;
+		while (err_counter < ABORT_THRESHOLD) {
+			final String url = XKCD_URL.replace(NUM_REPLACE, Integer.toString(counter++));
+
+			try {
+				final JSONObject jsonObj = readJsonFromUrl(url);
+
+				this.getImageURLs().add(jsonObj.get("img").toString());
+				System.out.println(jsonObj.get("img").toString());
+
+				err_counter = 0;
+			} catch (JSONException | IOException e) {
+				err_counter++;
+			}
+		}
+	}
+
+	public static JSONObject readJsonFromUrl(final String url) throws IOException, JSONException {
+		final InputStream is = new URL(url).openStream();
+		try {
+			final BufferedReader rd = new BufferedReader(new InputStreamReader(is, Charset.forName("UTF-8")));
+			final String jsonText = readAll(rd);
+			final JSONObject json = new JSONObject(jsonText);
+			return json;
+		} finally {
+			is.close();
+		}
+	}
+
+	private static String readAll(final Reader rd) throws IOException {
+		final StringBuilder sb = new StringBuilder();
+		int cp;
+		while ((cp = rd.read()) != -1) {
+			sb.append((char) cp);
+		}
+		return sb.toString();
+	}
+
+	/**
+	 * @return the imageURLs
+	 */
+	public List<String> getImageURLs() {
+		return imageURLs;
+	}
+
+}

xkcd_downloader/src/org/kuchelmeister/xkcd/downloader/Main.java

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+package org.kuchelmeister.xkcd.downloader;
+
+public class Main {
+
+	public static void main(final String[] args) {
+		final ImageFinder finder = new ImageFinder();
+		final ImageDownloader downloader = new ImageDownloader();
+
+		finder.findImages();
+		downloader.downloadAllImages(finder.getImageURLs(), "C:/Users/Hannes/Pictures/xkcd/");
+	}
+
+}

xkcd_downloader/test/org/kuchelmeister/xkcd/downloader/AllTests.java

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+package org.kuchelmeister.xkcd.downloader;
+
+import org.junit.runner.RunWith;
+import org.junit.runners.Suite;
+import org.junit.runners.Suite.SuiteClasses;
+
+@RunWith(Suite.class)
+@SuiteClasses({ ImageDonwloaderTest.class })
+public class AllTests {
+
+}

xkcd_downloader/test/org/kuchelmeister/xkcd/downloader/ImageDonwloaderTest.java

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+package org.kuchelmeister.xkcd.downloader;
+
+import java.io.File;
+import java.util.LinkedList;
+import java.util.List;
+
+import org.junit.Test;
+
+public class ImageDonwloaderTest {
+	@Test
+	public void noFolderExistsDownloadTest() {
+		final String url = "https://imgs.xkcd.com/comics/barrel_cropped_(1).jpg";
+		final String folderDIR = "testing";
+		final ImageDownloader downloader = new ImageDownloader();
+
+		final List<String> urls = new LinkedList<>();
+
+		urls.add(url);
+
+		final File f = new File(folderDIR);
+		if (f.exists()) {
+			f.delete();
+		}
+		downloader.downloadAllImages(urls, folderDIR);
+
+		org.junit.Assert.assertEquals(true, f.exists());
+	}
+
+}