[REFACOR] To simplify things but tests are still failing

Author: hossain-khan

lib/src/main/kotlin/io/github/json5/kotlin/EscapeHelper.kt

@@ -0,0 +1,86 @@
+package io.github.json5.kotlin
+
+/**
+ * Helper for handling escape sequences in JSON5
+ */
+object EscapeHelper {
+    /**
+     * Processes a string that may contain escape sequences into their actual character representation
+     * This is used for property names that contain escaped characters like \uXXXX
+     */
+    fun processEscapedString(input: String): String {
+        val result = StringBuilder()
+        var i = 0
+
+        while (i < input.length) {
+            if (input[i] == '\\' && i + 1 < input.length) {
+                // Handle escape sequence
+                when (val nextChar = input[i + 1]) {
+                    'u' -> {
+                        // Unicode escape sequence \uXXXX
+                        if (i + 5 < input.length) {
+                            val hexCode = input.substring(i + 2, i + 6)
+                            try {
+                                val charCode = hexCode.toInt(16)
+                                result.append(charCode.toChar())
+                                i += 6
+                            } catch (e: NumberFormatException) {
+                                result.append('\\').append('u')
+                                i += 2
+                            }
+                        } else {
+                            result.append('\\').append('u')
+                            i += 2
+                        }
+                    }
+                    'x' -> {
+                        // Hex escape sequence \xFF
+                        if (i + 3 < input.length) {
+                            val hexCode = input.substring(i + 2, i + 4)
+                            try {
+                                val charCode = hexCode.toInt(16)
+                                result.append(charCode.toChar())
+                                i += 4
+                            } catch (e: NumberFormatException) {
+                                result.append('\\').append('x')
+                                i += 2
+                            }
+                        } else {
+                            result.append('\\').append('x')
+                            i += 2
+                        }
+                    }
+                    'b' -> { result.append('\b'); i += 2 }
+                    'f' -> { result.append('\u000C'); i += 2 }
+                    'n' -> { result.append('\n'); i += 2 }
+                    'r' -> { result.append('\r'); i += 2 }
+                    't' -> { result.append('\t'); i += 2 }
+                    'v' -> { result.append('\u000B'); i += 2 }
+                    '0' -> { result.append('\u0000'); i += 2 }
+                    'a' -> { result.append('\u0007'); i += 2 } // Bell character
+                    '\\' -> { result.append('\\'); i += 2 }
+                    '\'' -> { result.append('\''); i += 2 }
+                    '"' -> { result.append('"'); i += 2 }
+                    '\n' -> { i += 2 } // Line continuation - skip both characters
+                    '\r' -> {
+                        i += 2
+                        // Skip following \n if present (for \r\n line endings)
+                        if (i < input.length && input[i] == '\n') {
+                            i++
+                        }
+                    }
+                    '\u2028', '\u2029' -> { i += 2 } // Line/paragraph separator continuation
+                    else -> {
+                        result.append(nextChar)
+                        i += 2
+                    }
+                }
+            } else {
+                result.append(input[i])
+                i++
+            }
+        }
+
+        return result.toString()
+    }
+}