content: /*
   *  Licensed to the Apache Software Foundation (ASF) under one
   *  or more contributor license agreements.  See the NOTICE file
   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you 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
   *
   *        http://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 org.apache.causeway.applib.fa;
  
  import java.util.stream.Collectors;
  
  import org.apache.causeway.commons.internal.base._NullSafe;
  import org.apache.causeway.commons.internal.base._Strings;
  
  import lombok.experimental.UtilityClass;
  
  @UtilityClass
  class FontAwesomeQuickNotationGenerator {
  
      String generate(final FontAwesomeLayers model) {
          return _NullSafe.stream(model.iconEntries())
              .map(iconEntry->processPrefixes(iconEntry.cssClasses()))
              .collect(Collectors.joining(", "));
      }
  
      private String processPrefixes(final String cssClasses) {
          return _Strings.splitThenStream(cssClasses, " ")
              .map(String::trim)
              .filter(_Strings::isNotEmpty)
              .map(FontAwesomeQuickNotationGenerator::processPrefix)
              .filter(_Strings::isNotEmpty)
              .collect(Collectors.joining(" "));
      }
  
      private String processPrefix(final String cssQuickClass) {
          if(cssQuickClass.equals("fa")
                  || cssQuickClass.equals("fa-fw")) {
              return null;
          }
          if(cssQuickClass.startsWith("fa-")) {
              return cssQuickClass.substring(3);
          }
          return "." + cssQuickClass;
      }
  
  }
  