add getting addition data from the github api

0-Plugin/src/main/java/tag/matcherImplementations/GitHubTagMatcher.java

@@ -0,0 +1,77 @@
+package tag.matcherImplementations;
+
+import datastructures.json.JSONParser;
+import link.LinkUrl;
+import tag.OptionalTag;
+import tag.Tag;
+import tag.TagMatcher;
+import tag.TagName;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.MalformedURLException;
+import java.net.ProtocolException;
+import java.net.URL;
+import java.util.Map;
+import java.util.Scanner;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+
+public class GitHubTagMatcher extends TagMatcher {
+
+	public GitHubTagMatcher() {
+		tagName = new TagName("github");
+	}
+
+	public TagName getName() {
+		return tagName;
+	}
+
+	public String getAdditionInfo(String urlPath) {
+
+		try {
+			URL url = new URL("https://api.github.com/repos" + urlPath);
+			HttpURLConnection con = (HttpURLConnection) url.openConnection();
+			con.setRequestMethod("GET");
+
+			con.setRequestProperty("accept", "application/vnd.github.v3+json");
+
+			// This line makes the request
+			InputStream responseStream = con.getInputStream();
+
+			String text = new String(responseStream.readAllBytes(), UTF_8);
+
+			var parsedJSON = (Map<?, ?>) JSONParser.parseJSON(text);
+
+			return (String) parsedJSON.get("description");
+
+		}
+		catch (JSONParser.JSONParseException e) {
+			e.printStackTrace();
+		}
+		catch (ProtocolException e) {
+			return "";
+		}
+		catch (MalformedURLException e) {
+			return "";
+		}
+		catch (IOException e) {
+			return "";
+		}
+		catch (ClassCastException e) {
+			return "";
+		}
+		return "";
+	}
+
+	@Override
+	public OptionalTag ifMatches(LinkUrl linkUrl) {
+		if (linkUrl.getUrl().getHost().equals("github.com")) {
+
+			String additionInfo = getAdditionInfo(linkUrl.getUrl().getPath());
+			return OptionalTag.of(new Tag(getName()).addAdditionalData(additionInfo));
+		}
+		return OptionalTag.empty();
+	}
+}

0-Plugin/src/test/java/tag/matcherImplementations/GitHubTagMatcherTest.java

@@ -0,0 +1,20 @@
+package tag.matcherImplementations;
+
+import link.LinkUrl;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class GitHubTagMatcherTest {
+
+	@Test
+	void gettingDescriptionWorks() {
+
+		var sut = new GitHubTagMatcher();
+
+		var tag = sut.ifMatches(new LinkUrl("https://github.com/filefighter/Webapp")).getTag().orElseThrow();
+
+		assertEquals("Frontend Service for FileFighter", tag.getAdditionalData().orElseThrow());
+
+	}
+}