/*
    * Copyright 2001-2005 The Apache Software Foundation.
    *
    * 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
    *
    *      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.logging.log4j.catalog.api.plugins;
  
  import org.apache.logging.log4j.catalog.api.ConstraintType;
  import org.apache.logging.log4j.core.config.plugins.Plugin;
  import static org.apache.logging.log4j.catalog.api.util.StringUtils.isBlank;
  import static org.apache.logging.log4j.catalog.api.util.StringUtils.appendNewline;
  
  /**
   *
   */
  @Plugin(name = "minLength", category = ConstraintType.CATEGORY)
  public class MinLengthConstraint implements ConstraintType {
  
      @Override
      public void validate(boolean isRequestContext, String name, String value, String minLength, StringBuilder error) {
          if (isBlank(minLength)) {
              appendNewline(error);
              if (isRequestContext) {
                  error.append("ThreadContext key ");
              }
              error.append(name).append(" has no minimum length value defined");
              return;
          }
          if (!isBlank(value)) {
              try {
                  int minlen = Integer.parseInt(minLength);
                  if (value.length() < minlen) {
                      appendNewline(error);
                      if (isRequestContext) {
                          error.append("ThreadContext key ");
                      }
                      error.append(name).append(" does not contain ").append(minLength).append(" characters.");
                  }
              } catch (Exception ex) {
                  appendNewline(error);
                  if (isRequestContext) {
                      error.append("ThreadContext key ");
                  }
                  error.append(name).append(" encountered an error trying to determine the minimum length value: ").append(ex.getMessage());
              }
          }
      }
  }