Add PandaSpigotUpdater (#23)

Signed-off-by: Minionguyjpro <minionguyjpro@gmail.com>

lib/src/main/java/me/hsgamer/mcserverupdater/UpdateBuilder.java

@@ -32,6 +32,7 @@ public final class UpdateBuilder {
         registerUpdater(versionQuery -> new PaperUpdater(versionQuery, "waterfall"), "waterfall");
         registerUpdater(versionQuery -> new PaperUpdater(versionQuery, "velocity"), "velocity");
         registerUpdater(versionQuery -> new PaperUpdater(versionQuery, "folia"), "folia");
+        registerUpdater(versionQuery -> new PandaSpigotUpdater(versionQuery, "pandaspigot"), "pandaspigot");
         registerUpdater(PurpurUpdater::new, "purpur", "purpurmc");
         registerUpdater(BungeeCordUpdater::new, "bungeecord", "bungee");
         registerUpdater(SpigotUpdater::new, "spigot", "spigotmc");

lib/src/main/java/me/hsgamer/mcserverupdater/updater/PandaSpigotUpdater.java

@@ -0,0 +1,117 @@
+package me.hsgamer.mcserverupdater.updater;
+
+import me.hsgamer.hscore.logger.common.Logger;
+import me.hsgamer.hscore.web.UserAgent;
+import me.hsgamer.hscore.web.WebUtils;
+import me.hsgamer.mcserverupdater.UpdateBuilder;
+import me.hsgamer.mcserverupdater.api.FileDigestChecksum;
+import me.hsgamer.mcserverupdater.api.InputStreamUpdater;
+import me.hsgamer.mcserverupdater.util.VersionQuery;
+import org.json.JSONArray;
+import org.json.JSONObject;
+import org.json.JSONTokener;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URLConnection;
+import java.security.MessageDigest;
+
+public class PandaSpigotUpdater implements InputStreamUpdater, FileDigestChecksum {
+    private final UpdateBuilder updateBuilder;
+    private final String version;
+    private final String build;
+    private final String projectUrl;
+    private final String versionUrl;
+    private final String buildUrl;
+    private final String downloadUrl;
+
+    public PandaSpigotUpdater(VersionQuery versionQuery, String project) {
+        this.updateBuilder = versionQuery.updateBuilder;
+        projectUrl = String.format("https://downloads.hpfxd.com/v2/projects/%s", project);
+        versionUrl = projectUrl + "/versions/%s";
+        buildUrl = versionUrl + "/builds/%s";
+        downloadUrl = buildUrl + "/downloads/paperclip";
+
+        version = versionQuery.isDefault ? getDefaultVersion() : versionQuery.version;
+        build = getBuild();
+    }
+
+    private String getDefaultVersion() {
+        updateBuilder.debug("Getting default version from " + projectUrl);
+        try {
+            URLConnection connection = UserAgent.CHROME.assignToConnection(WebUtils.createConnection(projectUrl));
+            InputStream inputStream = connection.getInputStream();
+            JSONObject jsonObject = new JSONObject(new JSONTokener(inputStream));
+            JSONArray builds = jsonObject.getJSONArray("versions");
+            return builds.getString(builds.length() - 1);
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private String getBuild() {
+        String formattedUrl = String.format(versionUrl, version);
+        updateBuilder.debug("Getting latest build from " + formattedUrl);
+        try {
+            URLConnection connection = UserAgent.CHROME.assignToConnection(WebUtils.createConnection(formattedUrl));
+            InputStream inputStream = connection.getInputStream();
+            JSONObject jsonObject = new JSONObject(new JSONTokener(inputStream));
+            JSONArray builds = jsonObject.getJSONArray("builds");
+            return Integer.toString(builds.getInt(builds.length() - 1));
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private JSONObject getDownload() throws IOException {
+        String formattedUrl = String.format(buildUrl, version, build);
+        updateBuilder.debug("Getting download from " + formattedUrl);
+        URLConnection connection = UserAgent.CHROME.assignToConnection(WebUtils.createConnection(formattedUrl));
+        InputStream inputStream = connection.getInputStream();
+        JSONObject jsonObject = new JSONObject(new JSONTokener(inputStream));
+        JSONObject downloads = jsonObject.getJSONObject("downloads");
+        return downloads.getJSONObject("paperclip");
+    }
+
+    @Override
+    public String getChecksum() {
+        try {
+            JSONObject paperclip = getDownload();
+            return paperclip.getString("sha256");
+        } catch (Exception e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+
+    @Override
+    public MessageDigest getMessageDigest() throws Exception {
+        return MessageDigest.getInstance("SHA-256");
+    }
+
+    @Override
+    public InputStream getInputStream() {
+        String fileName;
+        try {
+            JSONObject paperclip = getDownload();
+            fileName = paperclip.getString("name");
+        } catch (Exception e) {
+            e.printStackTrace();
+            return null;
+        }
+        String formattedUrl = String.format(downloadUrl, version, build, fileName);
+        updateBuilder.debug("Getting input stream from " + formattedUrl);
+        try {
+            URLConnection connection = UserAgent.CHROME.assignToConnection(WebUtils.createConnection(formattedUrl));
+            return connection.getInputStream();
+        } catch (Exception e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+
+    @Override
+    public Logger getLogger() {
+        return updateBuilder.logger();
+    }
+}