endpoint returning invites based on hostname

src/main/java/me/youhavetrouble/inviter/Main.java

@@ -109,4 +109,8 @@ public class Main {
         return discordInviteManager;
     }
 
+    public static Storage getStorage() {
+        return storage;
+    }
+
 }

src/main/java/me/youhavetrouble/inviter/discord/GuildSettings.java

@@ -3,6 +3,7 @@ package me.youhavetrouble.inviter.discord;
 import org.jetbrains.annotations.Nullable;
 
 public record GuildSettings(
+        long guildId,
         boolean apiEnabled,
         @Nullable String apiHostname
 ) {

src/main/java/me/youhavetrouble/inviter/http/endpoints/GetDiscordInviteByGuildId.java

@@ -38,8 +38,8 @@ public class GetDiscordInviteByGuildId implements EndpointHandler {
             return;
         }
 
-        DiscordInviteManager storage = Main.getDiscordInviteMenager();
-        DiscordInvite invite = storage.getInvite(guildIdLong);
+        DiscordInviteManager inviteManager = Main.getDiscordInviteMenager();
+        DiscordInvite invite = inviteManager.getInvite(guildIdLong);
 
         if (invite == null) {
             exchange.sendResponseHeaders(404, -1); // Not Found

src/main/java/me/youhavetrouble/inviter/http/endpoints/HandlerKernel.java

@@ -13,6 +13,7 @@ public class HandlerKernel implements HttpHandler {
     private final Set<EndpointHandler> handlers = new HashSet<>();
 
     public HandlerKernel() {
+        handlers.add(new MainEndpoint());
         handlers.add(new GetDiscordInviteByGuildId());
     }
 
@@ -20,7 +21,7 @@ public class HandlerKernel implements HttpHandler {
     public void handle(HttpExchange exchange) throws IOException {
 
         String path = exchange.getRequestURI().getPath();
-        if (path.endsWith("/")) path = path.substring(0, path.length() - 1);
+        if (path.endsWith("/") && path.length() > 1) path = path.substring(0, path.length() - 1);
         exchange.getResponseHeaders().set("Access-Control-Allow-Origin", "*");
         exchange.getResponseHeaders().set("Access-Control-Allow-Methods", "*");
         exchange.getResponseHeaders().set("Access-Control-Allow-Headers", "Content-Type");

src/main/java/me/youhavetrouble/inviter/http/endpoints/MainEndpoint.java

@@ -0,0 +1,49 @@
+package me.youhavetrouble.inviter.http.endpoints;
+
+import com.sun.net.httpserver.HttpExchange;
+import me.youhavetrouble.inviter.Main;
+import me.youhavetrouble.inviter.discord.DiscordInvite;
+import me.youhavetrouble.inviter.discord.DiscordInviteManager;
+import me.youhavetrouble.inviter.discord.GuildSettings;
+import org.jetbrains.annotations.NotNull;
+
+import java.io.IOException;
+import java.util.regex.Pattern;
+
+public class MainEndpoint implements EndpointHandler {
+
+    private final Pattern pathPattern = Pattern.compile("^/$");
+
+    @NotNull
+    @Override
+    public Pattern pathPattern() {
+        return pathPattern;
+    }
+
+    @Override
+    public void handle(@NotNull HttpExchange exchange) throws IOException {
+        if (!exchange.getRequestMethod().equals("GET")) {
+            exchange.sendResponseHeaders(405, -1); // Method Not Allowed
+            return;
+        }
+
+        String host = exchange.getRemoteAddress().getHostName();
+
+        GuildSettings guildSettings = Main.getStorage().getGuildSettings(host);
+        if (guildSettings == null) {
+            exchange.sendResponseHeaders(404, -1); // Not Found
+            return;
+        }
+
+        DiscordInviteManager inviteManager = Main.getDiscordInviteMenager();
+        DiscordInvite invite = inviteManager.getInvite(guildSettings.guildId());
+
+        if (invite == null) {
+            exchange.sendResponseHeaders(404, -1); // Not Found
+            return;
+        }
+
+        exchange.getResponseHeaders().set("Location", "https://discord.gg/" + invite.code());
+        exchange.sendResponseHeaders(307, -1);
+    }
+}

src/main/java/me/youhavetrouble/inviter/storage/SqliteStorage.java

@@ -64,15 +64,37 @@ public class SqliteStorage implements Storage {
             if (resultSet.next()) {
                 boolean apiEnabled = resultSet.getBoolean("api_enabled");
                 String apiHostname = resultSet.getString("api_hostname");
-                return new GuildSettings(apiEnabled, apiHostname);
+                return new GuildSettings(guildId, apiEnabled, apiHostname);
             }
-            return new GuildSettings(false, null);
+            return new GuildSettings(guildId,false, null);
         } catch (SQLException e) {
             throw new RuntimeException("Failed to retrieve guild settings", e);
 
         }
     }
 
+    @Nullable
+    @Override
+    public GuildSettings getGuildSettings(@NotNull String hostname) {
+
+        try (Connection connection = dataSource.getConnection()) {
+            var statement = connection.prepareStatement(
+                "SELECT * FROM guild_settings WHERE api_hostname = ?"
+            );
+            statement.setString(1, hostname);
+            ResultSet resultSet = statement.executeQuery();
+
+            if (resultSet.next()) {
+                long guildId = resultSet.getLong("guild_id");
+                boolean apiEnabled = resultSet.getBoolean("api_enabled");
+                return new GuildSettings(guildId, apiEnabled, hostname);
+            }
+            return null; // No settings found for the given hostname
+        } catch (SQLException e) {
+            throw new RuntimeException("Failed to retrieve guild settings by hostname", e);
+        }
+    }
+
     @Override
     public void saveDefaultGuildSettings(long guildId) {
         try (Connection connection = dataSource.getConnection()) {

src/main/java/me/youhavetrouble/inviter/storage/Storage.java

@@ -9,6 +9,8 @@ public interface Storage {
 
     @NotNull GuildSettings getGuildSettings(long guildId);
 
+    @Nullable GuildSettings getGuildSettings(@NotNull String hostname);
+
     void saveDefaultGuildSettings(long guildId);
 
     void updateDiscordApiEnabled(long guildId, boolean enabled);