Added method for getting tags from db

src/main/java/dev/salmonllama/fsbot/database/controllers/OutfitController.java

@@ -11,6 +11,8 @@ import dev.salmonllama.fsbot.database.models.Outfit;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Timestamp;
+import java.util.ArrayList;
+import java.util.Collection;
 import java.util.Optional;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.CompletionException;
@@ -86,6 +88,16 @@ public class OutfitController {
         });
     }
 
+    public static CompletableFuture<Collection<String>> getDistinctTags() {
+        return CompletableFuture.supplyAsync(() -> {
+            try {
+                return getDistinctTagsExec();
+            } catch (SQLException e) {
+                throw new CompletionException(e);
+            }
+        });
+    }
+
     private static void insertExec(Outfit outfit) throws SQLException {
         if (outfit.getCreated() == null) {
             outfit.setCreated(new Timestamp(System.currentTimeMillis()));
@@ -188,6 +200,18 @@ public class OutfitController {
         return count;
     }
 
+    private static Collection<String> getDistinctTagsExec() throws SQLException {
+        ResultSet rs = FSDB.get().select("SELECT DISTINCT tag FROM outfits");
+
+        Collection<String> tags = new ArrayList<>();
+        while (rs.next()) {
+            tags.add(rs.getString("tag"));
+        }
+
+        FSDB.get().close(rs);
+        return tags;
+    }
+
     private static Outfit mapObject(ResultSet rs) throws SQLException {
         return new Outfit.OutfitBuilder()
                 .setId(rs.getString("id"))