From 81e10478d68a8888d6d7f7bd849b9b51f6505802 Mon Sep 17 00:00:00 2001
From: Alejandro Revilla <apr@jpos.org>
Date: Wed, 10 Apr 2024 17:47:11 -0300
Subject: [PATCH] add ISOUtil.toASCII and toLatin helper methods

---
 jpos/src/main/java/org/jpos/iso/ISOUtil.java  | 28 +++++++++++++++++++
 .../test/java/org/jpos/iso/ISOUtilTest.java   | 13 +++++++++
 2 files changed, 41 insertions(+)

diff --git a/jpos/src/main/java/org/jpos/iso/ISOUtil.java b/jpos/src/main/java/org/jpos/iso/ISOUtil.java
index 86d7fb30ce..539d4a3baf 100644
--- a/jpos/src/main/java/org/jpos/iso/ISOUtil.java
+++ b/jpos/src/main/java/org/jpos/iso/ISOUtil.java
@@ -1733,4 +1733,32 @@ public static String charDecode(String s, char delimiter, int i) {
             return i < split.length ? split[i] : "";
         }
     }
+
+    public static String toUnicodeString(String input) {
+        StringBuilder sb = new StringBuilder();
+        for (char c : input.toCharArray()) {
+            sb.append(String.format("\\u%04x", (int) c));
+        }
+        return sb.toString();
+    }
+
+    public static String toASCII(String s) {
+        return toSingleByte (s, 0x7F);
+    }
+    public static String toLatin(String s) {
+        return toSingleByte (s, 0xFF);
+    }
+    
+    private static String toSingleByte(String s, int mask) {
+        StringBuilder sb = new StringBuilder();
+        s.codePoints().forEach(cp -> {
+            if (cp > mask) {
+                sb.append(" ");
+                if (cp > 0xFFFF) // multi-byte character
+                    sb.append(" ");
+            } else
+                sb.appendCodePoint(cp); // Append the single-byte character
+        });
+        return sb.toString();
+    }
 }
diff --git a/jpos/src/test/java/org/jpos/iso/ISOUtilTest.java b/jpos/src/test/java/org/jpos/iso/ISOUtilTest.java
index 3f48c8bb55..888bd8ab19 100644
--- a/jpos/src/test/java/org/jpos/iso/ISOUtilTest.java
+++ b/jpos/src/test/java/org/jpos/iso/ISOUtilTest.java
@@ -5072,4 +5072,17 @@ public void testCharEncodeAndDecode() {
         assertEquals("", ISOUtil.charDecode("a:b:c", ':', 4), "error getting part 4 of  \"a:b:c\"");
         assertEquals("b", ISOUtil.charDecode(":b:c", ':', 1), "error getting part 1 of  \":b:c\"");
     }
+
+    @Test
+    public void testUTF () {
+        String s = "- \uD83D\uDC7D\uD83D\uDC94LTUS Lei\u0091s 19 Ñandú Rally\u0092sINUS";
+        String expectedLatin = "-     LTUS Lei\u0091s 19 Ñandú Rally\u0092sINUS";
+        String expectedASCII = "-     LTUS Lei s 19  and  Rally sINUS";
+        String d = ISOUtil.toLatin(s);
+        assertEquals(s.length(), d.length());
+        assertEquals(expectedLatin, d);
+        d = ISOUtil.toASCII(s);
+        assertEquals(s.length(), d.length());
+        assertEquals(expectedASCII, d);
+    }
 }