Added latest tag option

.gitignore

@@ -4,4 +4,5 @@
 .gradle/
 out/
 build/
-/config.json
+/config.json
+artifacts/

build.gradle

@@ -15,10 +15,11 @@ repositories {
 }
 
 dependencies {
-    implementation 'org.springframework.boot:spring-boot-starter-web'
+    implementation 'org.springframework.boot:spring-boot-starter-web:2.5.5'
     compile group: 'com.google.code.gson', name: 'gson', version: '2.8.6'
     compile group: 'commons-io', name: 'commons-io', version: '2.7'
     compile 'com.jcraft:jsch:0.1.55'
+    implementation 'org.kohsuke:github-api:1.133'
 }
 
 jar {

src/main/java/me/TechsCode/ReleaseServer/WebRequestsHandler.java

@@ -1,5 +1,7 @@
 package me.TechsCode.ReleaseServer;
 
+import com.sun.javafx.scene.text.HitInfo;
+import me.TechsCode.ReleaseServer.github.GitHubUtil;
 import org.springframework.core.io.Resource;
 import org.springframework.core.io.UrlResource;
 import org.springframework.http.HttpHeaders;
@@ -12,6 +14,7 @@
 import java.net.MalformedURLException;
 import java.net.URLEncoder;
 import java.util.List;
+import java.util.Objects;
 import java.util.Optional;
 import java.util.stream.Collectors;
 
@@ -41,8 +44,17 @@ public Object download(@RequestParam(value = "token", required = false) String t
             return "Could not find any artifact for project '"+project+"'";
         }
 
+        if(tag.equals("latest")){
+            String ghToken = "";
+            if(artifactsOfProject.stream().findFirst().get().getRelease().getProject().getGithubToken().isPresent())
+                ghToken = artifactsOfProject.stream().findFirst().get().getRelease().getProject().getGithubToken().get();
+            String repo = artifactsOfProject.stream().findFirst().get().getRelease().getProject().getGithubRepository();
+            tag = Objects.requireNonNull(GitHubUtil.getLatestRelease(ghToken, repo)).getRelease().getTagName();
+        }
+
+        String finalTag = tag;
         Optional<Artifact> artifact = artifactsOfProject.stream()
-                .filter(x -> x.getReleaseTag().equals(tag)).findFirst();
+                .filter(x -> x.getReleaseTag().equals(finalTag)).findFirst();
 
         if(artifact.isPresent()){
             if(artifact.get().getAssets().length == 0){

src/main/java/me/TechsCode/ReleaseServer/github/GitHubUtil.java

@@ -0,0 +1,35 @@
+package me.TechsCode.ReleaseServer.github;
+
+import org.kohsuke.github.*;
+
+import java.io.IOException;
+import java.util.Objects;
+
+public class GitHubUtil {
+
+    private static GitHub github = null;
+
+    public static GithubRelease getLatestRelease(String token, String repo) {
+        try {
+            GHRepository ghrepo = Objects.requireNonNull(getGithub(token)).getRepository(repo);
+            GHRelease release = ghrepo.getLatestRelease();
+
+            if(release == null) return null;
+
+            return new GithubRelease(release);
+        } catch (IOException e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+
+    private static GitHub getGithub(String token) {
+        try {
+            if(github == null) github = new GitHubBuilder().withOAuthToken(token).build();
+            return github;
+        } catch (IOException e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+}

src/main/java/me/TechsCode/ReleaseServer/github/GithubRelease.java

@@ -0,0 +1,30 @@
+package me.TechsCode.ReleaseServer.github;
+
+import org.kohsuke.github.GHAsset;
+import org.kohsuke.github.GHRelease;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.List;
+
+public class GithubRelease {
+
+    private final GHRelease release;
+    private GHAsset asset = null;
+
+    public GithubRelease(GHRelease release) throws IOException {
+        List<GHAsset> releaseAsset = release.listAssets().toList();
+        if(releaseAsset.size() > 0) {
+            this.asset = releaseAsset.get(0);
+        }
+        this.release = release;
+    }
+
+    public GHRelease getRelease() {
+        return release;
+    }
+
+    public GHAsset getAsset() {
+        return asset;
+    }
+}