WIP custom component replacer no regex!!

src/paper/java/me/clip/placeholderapi/replacer/ComponentReplacer.java

@@ -0,0 +1,177 @@
+package me.clip.placeholderapi.replacer;
+
+import me.clip.placeholderapi.PlaceholderAPI;
+import net.kyori.adventure.key.Key;
+import net.kyori.adventure.nbt.api.BinaryTagHolder;
+import net.kyori.adventure.text.*;
+import net.kyori.adventure.text.event.ClickEvent;
+import net.kyori.adventure.text.event.DataComponentValue;
+import net.kyori.adventure.text.event.HoverEvent;
+import net.kyori.adventure.text.format.Style;
+import org.bukkit.OfflinePlayer;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class ComponentReplacer {
+    @NotNull
+    public static Component replace(@Nullable final OfflinePlayer player, @NotNull final Component component) {
+        return rebuild(player, component);
+    }
+
+    @NotNull
+    private static Component rebuild(@Nullable final OfflinePlayer player, @NotNull final Component component) {
+        Component rebuilt;
+
+        if (component instanceof TextComponent) {
+            final TextComponent text = (TextComponent) component;
+            final String replaced = PlaceholderAPI.setPlaceholders(player, text.content());
+
+            rebuilt = Component.text(replaced);
+        } else if (component instanceof TranslatableComponent) {
+            final TranslatableComponent translatable = (TranslatableComponent) component;
+            final List<Component> arguments = new ArrayList<>();
+
+            for (final ComponentLike arg : translatable.arguments()) {
+                arguments.add(rebuild(player, arg.asComponent()));
+            }
+
+            rebuilt = Component.translatable(translatable.key(), arguments);
+        } else if (component instanceof KeybindComponent) {
+            final KeybindComponent keybind = (KeybindComponent) component;
+            rebuilt = Component.keybind(keybind.keybind());
+        } else if (component instanceof ScoreComponent) {
+            final ScoreComponent score = (ScoreComponent) component;
+            rebuilt = Component.score(score.name(), score.objective());
+        } else if (component instanceof SelectorComponent) {
+            final SelectorComponent selector = (SelectorComponent) component;
+            rebuilt = Component.selector(selector.pattern());
+        } else {
+            rebuilt = Component.empty();
+        }
+
+        rebuilt = rebuilt.style(rebuildStyle(player, component.style()));
+
+        if (!component.children().isEmpty()) {
+            final List<Component> children = new ArrayList<>();
+            for (Component child : component.children()) {
+                children.add(rebuild(player, child));
+            }
+            rebuilt = rebuilt.children(children);
+        }
+
+        return rebuilt;
+    }
+
+    @NotNull
+    private static Style rebuildStyle(@Nullable final OfflinePlayer player, @NotNull final Style style) {
+        final Style.Builder builder = style.toBuilder();
+        final ClickEvent click = style.clickEvent();
+
+        if (click != null) {
+            builder.clickEvent(rebuildClickEvent(player, click));
+        }
+
+        final HoverEvent<?> hover = style.hoverEvent();
+
+        if (hover != null) {
+            builder.hoverEvent(rebuildHoverEvent(player, hover));
+        }
+
+        return builder.build();
+    }
+
+    @NotNull
+    private static ClickEvent rebuildClickEvent(@Nullable final OfflinePlayer player, @NotNull final ClickEvent click) {
+        final ClickEvent.Payload payload = click.payload();
+
+        if (!(payload instanceof ClickEvent.Payload.Text)) {
+            return click;
+        }
+
+        final String original = ((ClickEvent.Payload.Text) payload).value();
+        final String replaced = PlaceholderAPI.setPlaceholders(player, original);
+
+        final ClickEvent.Action action = click.action();
+
+        switch (action) {
+            case OPEN_URL:
+                return ClickEvent.openUrl(replaced);
+            case OPEN_FILE:
+                return ClickEvent.openFile(replaced);
+            case RUN_COMMAND:
+                return ClickEvent.runCommand(replaced);
+            case SUGGEST_COMMAND:
+                return ClickEvent.suggestCommand(replaced);
+            case COPY_TO_CLIPBOARD:
+                return ClickEvent.copyToClipboard(replaced);
+            default:
+                return click;
+        }
+    }
+
+    @NotNull
+    private static HoverEvent<?> rebuildHoverEvent(@Nullable final OfflinePlayer player, @NotNull final HoverEvent<?> hover) {
+        final Object value = hover.value();
+
+        if (value instanceof Component) {
+            final Component rebuilt = rebuild(player, (Component) value);
+            return HoverEvent.showText(rebuilt);
+        }
+
+        if (value instanceof HoverEvent.ShowItem) {
+            return rebuildShowItem(player, (HoverEvent.ShowItem) value);
+        }
+
+        if (value instanceof HoverEvent.ShowEntity) {
+            final HoverEvent.ShowEntity entity = (HoverEvent.ShowEntity) value;
+
+            Component rebuiltName = null;
+            if (entity.name() != null) {
+                rebuiltName = rebuild(player, entity.name());
+            }
+
+            return HoverEvent.showEntity(entity.type(), entity.id(), rebuiltName);
+        }
+
+        return hover;
+    }
+
+    @NotNull
+    private static HoverEvent<?> rebuildShowItem(@Nullable final OfflinePlayer player, @NotNull final HoverEvent.ShowItem item) {
+        final BinaryTagHolder nbt = item.nbt();
+
+        if (nbt != null && !nbt.string().isEmpty()) {
+            final String replaced = PlaceholderAPI.setPlaceholders(player, nbt.string());
+
+            return HoverEvent.showItem(item.item(), item.count(), BinaryTagHolder.binaryTagHolder(replaced));
+        }
+
+        //I'm not 100% sure this is how we're meant to support data components but let's give it a go and see if it causes any issues :)
+        final Map<Key, DataComponentValue> components = item.dataComponents();
+
+        if (!components.isEmpty()) {
+            final Map<Key, DataComponentValue> rebuilt = new HashMap<>();
+
+            for (final Map.Entry<Key, DataComponentValue> entry : components.entrySet()) {
+                final DataComponentValue value = entry.getValue();
+
+                if (!(value instanceof BinaryTagHolder)) {
+                    rebuilt.put(entry.getKey(), value);
+                    continue;
+                }
+
+                rebuilt.put(entry.getKey(), BinaryTagHolder.binaryTagHolder(PlaceholderAPI.setPlaceholders(player, ((BinaryTagHolder) value).string())));
+            }
+
+            return HoverEvent.showItem(item.item(), item.count(), rebuilt);
+        }
+
+        return HoverEvent.showItem(item);
+    }
+}