From db351e4096ffe9adbcb4d021bdf04ce9e51386ab Mon Sep 17 00:00:00 2001
From: ShadelessFox <yanuari.channel@gmail.com>
Date: Mon, 4 Mar 2024 00:51:01 +0100
Subject: [PATCH] Core Editor: Add basic decoding for `KJPXPath`

---
 .../data/handlers/KJPXPathValueHandler.java   | 97 +++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 modules/decima-ui/src/main/java/com/shade/decima/ui/data/handlers/KJPXPathValueHandler.java

diff --git a/modules/decima-ui/src/main/java/com/shade/decima/ui/data/handlers/KJPXPathValueHandler.java b/modules/decima-ui/src/main/java/com/shade/decima/ui/data/handlers/KJPXPathValueHandler.java
new file mode 100644
index 000000000..6474a0819
--- /dev/null
+++ b/modules/decima-ui/src/main/java/com/shade/decima/ui/data/handlers/KJPXPathValueHandler.java
@@ -0,0 +1,97 @@
+package com.shade.decima.ui.data.handlers;
+
+import com.shade.decima.model.rtti.RTTIType;
+import com.shade.decima.model.rtti.objects.RTTIObject;
+import com.shade.decima.model.util.hash.CRC32C;
+import com.shade.decima.ui.data.registry.ValueHandlerRegistration;
+import com.shade.decima.ui.data.registry.ValueHandlerRegistration.Selector;
+import com.shade.decima.ui.data.registry.ValueHandlerRegistration.Type;
+import com.shade.platform.model.util.IOUtils;
+import com.shade.platform.ui.controls.TextAttributes;
+import com.shade.util.NotNull;
+
+import java.nio.ByteOrder;
+import java.nio.charset.StandardCharsets;
+import java.util.Map;
+import java.util.StringJoiner;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+@ValueHandlerRegistration(id = "KJPXPath", name = "KJP XPath", value = {
+    @Selector(type = @Type(name = "KJPXPath"))
+})
+public class KJPXPathValueHandler extends ObjectValueHandler {
+    private static final Map<Integer, String> LOOKUP;
+
+    static {
+        final String[] knownNames = {
+            "continue",
+            "new_game",
+            "exit_game",
+            "game_over",
+            "update_info",
+            "can_restart",
+            "difficulty_select_title",
+            "very_easy",
+            "easy",
+            "normal",
+            "hard",
+            "very_hard",
+            "month",
+            "date",
+            "visible",
+            "text()",
+            "bool()",
+            "!bool()",
+            "int()",
+            "float()",
+            "object()",
+            "isNull()",
+            "!isNull()",
+            "count()",
+            "index()",
+            "index1()",
+            "exist()",
+            "!exist()",
+            "isEmpty()",
+            "!isEmpty()",
+        };
+
+        LOOKUP = Stream.of(knownNames).collect(Collectors.toMap(
+            name -> CRC32C.calculate(name.getBytes(StandardCharsets.UTF_8)),
+            Function.identity()
+        ));
+    }
+
+    @NotNull
+    @Override
+    public Decorator getDecorator(@NotNull RTTIType<?> type) {
+        return (value, component) -> component.append(getText(type, value), TextAttributes.REGULAR_ATTRIBUTES);
+    }
+
+    @NotNull
+    @Override
+    public String getText(@NotNull RTTIType<?> type, @NotNull Object value) {
+        final RTTIObject object = (RTTIObject) value;
+        final StringJoiner buffer = new StringJoiner("/");
+        final int length = (int) object.i64("Union7");
+
+        for (int i = 0; i < length; i++) {
+            buffer.add(getElementName(object.i64("Union%d".formatted(i))));
+        }
+
+        return buffer.toString();
+    }
+
+    @NotNull
+    private static String getElementName(long element) {
+        final String name = LOOKUP.get((int) element);
+
+        if (name != null) {
+            return name;
+        } else {
+            return IOUtils.toHexDigits((int) element, ByteOrder.BIG_ENDIAN);
+        }
+    }
+}