// Copyright (C) 2014 The Android Open Source Project
//
// 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 com.google.gerrit.server.query.change;

import com.google.common.base.Strings;
import com.google.gerrit.server.change.HashtagsUtil;
import com.google.gerrit.server.index.change.ChangeField;

public class ExactHashtagPredicate extends ChangeIndexPredicate {
  public ExactHashtagPredicate(String hashtag) {
    // Use toLowerCase without locale to match behavior in ChangeField.
    // TODO(dborowitz): Change both.
    super(ChangeField.HASHTAG, HashtagsUtil.cleanupHashtag(hashtag).toLowerCase());
  }

  @Override
  public boolean match(ChangeData cd) {
    if (Strings.isNullOrEmpty(getValue())) {
      return cd.hashtags().isEmpty();
    }
    for (String hashtag : cd.hashtags()) {
      if (hashtag.equalsIgnoreCase(getValue())) {
        return true;
      }
    }
    return false;
  }

  @Override
  public int getCost() {
    return 1;
  }
}