// Copyright (C) 2008 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.client;

import com.google.gerrit.client.data.AccountInfo;
import com.google.gerrit.client.reviewdb.Account;
import com.google.gwt.i18n.client.DateTimeFormat;

import java.util.Date;

/** Misc. formatting functions. */
public class FormatUtil {
  private static final DateTimeFormat sTime =
      DateTimeFormat.getShortTimeFormat();
  private static final DateTimeFormat mDate =
      DateTimeFormat.getMediumDateFormat();
  private static final DateTimeFormat dtfmt =
      DateTimeFormat.getFormat(mDate.getPattern() + " " + sTime.getPattern());

  /** Format a date using the locale's medium length format. */
  public static String mediumFormat(final Date dt) {
    if (dt == null) {
      return "";
    }
    return dtfmt.format(new Date(dt.getTime()));
  }

  /** Format an account as a name and email address. */
  public static String nameEmail(final Account acct) {
    return nameEmail(new AccountInfo(acct));
  }

  /**
   * Formats an account as an name and an email address.
   * <p>
   * Example output:
   * <ul>
   * <li><code>A U. Thor &lt;author@example.com&gt;</code>: full populated</li>
   * <li><code>A U. Thor (12)</code>: missing email address</li>
   * <li><code>Anonymous Coward &lt;author@example.com&gt;</code>: missing name</li>
   * <li><code>Anonymous Coward (12)</code>: missing name and email address</li>
   * </ul>
   */
  public static String nameEmail(final AccountInfo acct) {
    String name = acct.getFullName();
    if (name == null) {
      name = Gerrit.C.anonymousCoward();
    }

    final StringBuilder b = new StringBuilder();
    b.append(name);
    if (acct.getPreferredEmail() != null) {
      b.append(" <");
      b.append(acct.getPreferredEmail());
      b.append(">");
    } else {
      b.append(" (");
      b.append(acct.getId().get());
      b.append(")");
    }
    return b.toString();
  }

  /**
   * Formats an account name.
   * <p>
   * If the account has a full name, it returns only the full name. Otherwise it
   * returns a longer form that includes the email address.
   */
  public static String name(final AccountInfo ai) {
    if (ai.getFullName() != null) {
      return ai.getFullName();
    }
    if (ai.getPreferredEmail() != null) {
      return ai.getPreferredEmail();
    }
    return nameEmail(ai);
  }
}