add completions for note aliases

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

@@ -59,8 +59,8 @@ public class Main {
         jda.upsertCommand(Commands.slash("note", "Get a note")
                         .setIntegrationTypes(IntegrationType.GUILD_INSTALL, IntegrationType.USER_INSTALL)
                         .addOptions(
-                                new OptionData(OptionType.STRING, "note-id", "The ID of the note").setRequired(true),
+                                new OptionData(OptionType.STRING, "note-id", "The ID of the note", true, true),
-                                new OptionData(OptionType.BOOLEAN, "ephermeal", "Whether the note should be ephermal").setRequired(false)
+                                new OptionData(OptionType.BOOLEAN, "ephermeal", "Whether the note should be ephermal", true)
                         )
                         .setContexts(InteractionContextType.BOT_DM, InteractionContextType.GUILD, InteractionContextType.PRIVATE_CHANNEL)
                 ).queue();

src/main/java/me/youhavetrouble/noted/Storage.java

@@ -7,12 +7,14 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import javax.sql.DataSource;
-import java.awt.*;
+import java.awt.Color;
 import java.io.File;
 import java.sql.Connection;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.UUID;
 import java.util.logging.Logger;
 
@@ -20,6 +22,8 @@ import java.util.logging.Logger;
 
 public class Storage {
 
+    public final List<String> aliases = new ArrayList<>();
+
     private final Logger logger = Logger.getLogger("Storage");
 
     private final DataSource dataSource;
@@ -47,7 +51,7 @@ public class Storage {
         }
 
         createTables();
-
+        aliases.addAll(getAliases());
     }
 
     protected void shutdown() {
@@ -113,6 +117,7 @@ public class Storage {
             statement.setString(2, note.id.toString());
             statement.executeUpdate();
 
+            aliases.add(alias);
             connection.commit();
             return Status.SUCCESS;
         } catch (SQLException e) {
@@ -132,6 +137,7 @@ public class Storage {
             statement.setString(1, alias);
             statement.setString(2, noteId.toString());
             statement.executeUpdate();
+            aliases.add(alias);
             return Status.SUCCESS;
         } catch (SQLException e) {
             logger.warning("Failed to add alias");
@@ -139,6 +145,21 @@ public class Storage {
         }
     }
 
+    public List<String> getAliases() {
+        try (Connection connection = dataSource.getConnection()) {
+            PreparedStatement statement = connection.prepareStatement("SELECT alias FROM aliases");
+            ResultSet resultSet = statement.executeQuery();
+            List<String> aliases = new ArrayList<>();
+            while (resultSet.next()) {
+                aliases.add(resultSet.getString("alias"));
+            }
+            return aliases;
+        } catch (SQLException e) {
+            logger.warning("Failed to get aliases");
+            return new ArrayList<>();
+        }
+    }
+
     @Nullable
     public Note getNote(@NotNull String alias) {
         try (Connection connection = dataSource.getConnection()) {

src/main/java/me/youhavetrouble/noted/listener/SlashCommandListener.java

@@ -3,12 +3,29 @@ package me.youhavetrouble.noted.listener;
 import me.youhavetrouble.noted.Main;
 import me.youhavetrouble.noted.Storage;
 import me.youhavetrouble.noted.note.Note;
+import net.dv8tion.jda.api.events.interaction.command.CommandAutoCompleteInteractionEvent;
 import net.dv8tion.jda.api.events.interaction.command.SlashCommandInteractionEvent;
 import net.dv8tion.jda.api.hooks.ListenerAdapter;
+import net.dv8tion.jda.api.interactions.commands.Command;
 import net.dv8tion.jda.api.interactions.commands.OptionMapping;
 
+import java.util.List;
+import java.util.stream.Collectors;
+
 public class SlashCommandListener extends ListenerAdapter {
 
+    @Override
+    public void onCommandAutoCompleteInteraction(CommandAutoCompleteInteractionEvent event) {
+        if (event.getName().equals("note") && event.getFocusedOption().getName().equals("note-id")) {
+            List<Command.Choice> options = Main.getStorage().aliases.stream()
+                    .filter(word -> word.startsWith(event.getFocusedOption().getValue()))
+                    .map(word -> new Command.Choice(word, word))
+                    .limit(25)
+                    .collect(Collectors.toList());
+            event.replyChoices(options).queue();
+        }
+    }
+
     @Override
     public void onSlashCommandInteraction(SlashCommandInteractionEvent event) {
         switch (event.getName()) {