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