Added EncodeHtmlEntities, EncodeQp, Rot13 and Year

lib/src/main/java/rife2/render/Rot13.java

@@ -0,0 +1,86 @@
+/*
+ *  Copyright 2023 the original author or authors.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *       https://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ */
+
+package rife2.render;
+
+import rife.template.Template;
+import rife.template.ValueRenderer;
+
+/**
+ * <p>Translates a template value to/from ROT13.</p>
+ *
+ * <p>Usage:</p>
+ *
+ * <pre>
+ *   &lt;!--v render:rife.render.Rot13:valueId/--&gt;
+ *   {{v render:rife.render.Rot13:valueId}}
+ * </pre>
+ *
+ * @author <a href="https://erik.thauvin.net/">Erik C. Thauvin</a>
+ * @since 1.0
+ */
+public class Rot13 implements ValueRenderer {
+    /**
+     * Translates a String to/from ROT13.
+     *
+     * @param src The source String.
+     * @return The translated String.
+     */
+    public static String rot13(String src) {
+        if (src == null || src.isEmpty()) {
+            return "";
+        } else {
+            var output = new StringBuilder(src.length());
+
+            for (var i = 0; i < src.length(); i++) {
+                var inChar = src.charAt(i);
+
+                if ((inChar >= 'A') && (inChar <= 'Z')) {
+                    inChar += (char) 13;
+
+                    if (inChar > 'Z') {
+                        inChar -= (char) 26;
+                    }
+                }
+
+                if ((inChar >= 'a') && (inChar <= 'z')) {
+                    inChar += (char) 13;
+
+                    if (inChar > 'z') {
+                        inChar -= (char) 26;
+                    }
+                }
+
+                output.append(inChar);
+            }
+
+            return output.toString();
+        }
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public String render(Template template, String valueId, String differentiator) {
+        if (differentiator != null && !differentiator.isBlank() && template.hasValueId(differentiator)) {
+            return rot13(template.getValue(differentiator));
+        } else {
+            return "";
+        }
+    }
+}