✨ Added retrieve start message of thread effect

src/main/java/info/itsthesky/disky/elements/effects/retrieve/RetrieveStartMessage.java

@@ -0,0 +1,56 @@
+package info.itsthesky.disky.elements.effects.retrieve;
+
+import ch.njol.skript.Skript;
+import ch.njol.skript.classes.Changer;
+import ch.njol.skript.lang.Expression;
+import ch.njol.skript.lang.SkriptParser;
+import ch.njol.skript.util.AsyncEffect;
+import ch.njol.util.Kleenean;
+import info.itsthesky.disky.DiSky;
+import net.dv8tion.jda.api.entities.Message;
+import net.dv8tion.jda.api.entities.channel.concrete.ThreadChannel;
+import org.bukkit.event.Event;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+public class RetrieveStartMessage extends AsyncEffect {
+
+    static {
+        Skript.registerEffect(
+                RetrieveStartMessage.class,
+                "retrieve start message (from|with|of|in) %threadchannel% and store (it|the message) in %~objects%"
+        );
+    }
+
+    private Expression<ThreadChannel> exprChannel;
+    private Expression<?> exprResult;
+
+    @Override
+    public boolean init(Expression<?>[] expressions, int matchedPattern, @NotNull Kleenean isDelayed, SkriptParser.@NotNull ParseResult parseResult) {
+        exprChannel = (Expression<ThreadChannel>) expressions[0];
+        exprResult = expressions[1];
+        return Changer.ChangerUtils.acceptsChange(exprResult, Changer.ChangeMode.SET, Message.class);
+    }
+
+    @Override
+    protected void execute(@NotNull Event event) {
+        ThreadChannel channel = exprChannel.getSingle(event);
+        if (channel == null)
+            return;
+
+        final Message message;
+        try {
+            message = channel.retrieveStartMessage().complete();
+        } catch (Exception ex) {
+            DiSky.getErrorHandler().exception(event, ex);
+            return;
+        }
+
+        exprResult.change(event, new Message[] {message}, Changer.ChangeMode.SET);
+    }
+
+    @Override
+    public @NotNull String toString(@Nullable Event event, boolean debug) {
+        return "retrieve start message from " + exprChannel.toString(event, debug) + " and store it in " + exprResult.toString(event, debug);
+    }
+}