Flip > and >= in for loop conditions to < and <= respectively

Signed-off-by: Graham <gpe@openrs2.dev>

deob-ast/src/main/java/dev/openrs2/deob/ast/AstDeobfuscator.kt

@@ -14,6 +14,7 @@ import dev.openrs2.deob.ast.transform.BinaryExprOrderTransformer
 import dev.openrs2.deob.ast.transform.BitMaskTransformer
 import dev.openrs2.deob.ast.transform.ComplementTransformer
 import dev.openrs2.deob.ast.transform.EncloseTransformer
+import dev.openrs2.deob.ast.transform.ForLoopConditionTransformer
 import dev.openrs2.deob.ast.transform.IfElseTransformer
 import dev.openrs2.deob.ast.transform.IncrementTransformer
 import dev.openrs2.deob.ast.transform.NegativeLiteralTransformer
@@ -89,6 +90,7 @@ class AstDeobfuscator(private val modules: List<Path>) {
             ValueOfTransformer(),
             NewInstanceTransformer(),
             IncrementTransformer(),
+            ForLoopConditionTransformer(),
             EncloseTransformer()
         )
     }

deob-ast/src/main/java/dev/openrs2/deob/ast/transform/ForLoopConditionTransformer.kt

@@ -0,0 +1,28 @@
+package dev.openrs2.deob.ast.transform
+
+import com.github.javaparser.ast.CompilationUnit
+import com.github.javaparser.ast.Node
+import com.github.javaparser.ast.expr.BinaryExpr
+import com.github.javaparser.ast.stmt.ForStmt
+import dev.openrs2.deob.ast.util.walk
+
+class ForLoopConditionTransformer : Transformer() {
+    override fun transform(unit: CompilationUnit) {
+        unit.walk(Node.TreeTraversal.POSTORDER) { stmt: ForStmt ->
+            stmt.compare.ifPresent { compare ->
+                if (!compare.isBinaryExpr) {
+                    return@ifPresent
+                }
+
+                val expr = compare.asBinaryExpr()
+                val flipped = when (expr.operator) {
+                    BinaryExpr.Operator.GREATER -> BinaryExpr.Operator.LESS
+                    BinaryExpr.Operator.GREATER_EQUALS -> BinaryExpr.Operator.LESS_EQUALS
+                    else -> return@ifPresent
+                }
+
+                stmt.setCompare(BinaryExpr(expr.right, expr.left, flipped))
+            }
+        }
+    }
+}