content: /*
   * Copyright (C) 2006 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 android.webkit;
  
  import android.content.Context;
  import android.content.res.Resources;
  
  import java.util.Calendar;
  import java.util.Locale;
  
  import libcore.icu.LocaleData;
  
  /**
   * Sorts dates into the following groups:
   *   Today
   *   Yesterday
   *   seven days ago
   *   one month ago
   *   older than a month ago
   */
  
  public class DateSorter {
  
      private static final String LOGTAG = "webkit";
  
      /** must be >= 3 */
      public static final int DAY_COUNT = 5;
  
      private long [] mBins = new long[DAY_COUNT-1];
      private String [] mLabels = new String[DAY_COUNT];
      
      private static final int NUM_DAYS_AGO = 7;
  
      /**
       * @param context Application context
       */
      public DateSorter(Context context) {
          Resources resources = context.getResources();
  
          Calendar c = Calendar.getInstance();
          beginningOfDay(c);
          
          // Create the bins
          mBins[0] = c.getTimeInMillis(); // Today
          c.add(Calendar.DAY_OF_YEAR, -1);
          mBins[1] = c.getTimeInMillis();  // Yesterday
          c.add(Calendar.DAY_OF_YEAR, -(NUM_DAYS_AGO - 1));
          mBins[2] = c.getTimeInMillis();  // Five days ago
          c.add(Calendar.DAY_OF_YEAR, NUM_DAYS_AGO); // move back to today
          c.add(Calendar.MONTH, -1);
          mBins[3] = c.getTimeInMillis();  // One month ago
  
          // build labels
          Locale locale = resources.getConfiguration().locale;
          if (locale == null) {
              locale = Locale.getDefault();
          }
          LocaleData localeData = LocaleData.get(locale);
          mLabels[0] = localeData.today;
          mLabels[1] = localeData.yesterday;
  
          int resId = com.android.internal.R.plurals.last_num_days;
          String format = resources.getQuantityString(resId, NUM_DAYS_AGO);
          mLabels[2] = String.format(format, NUM_DAYS_AGO);
  
          mLabels[3] = context.getString(com.android.internal.R.string.last_month);
          mLabels[4] = context.getString(com.android.internal.R.string.older);
      }
  
      /**
       * @param time time since the Epoch in milliseconds, such as that
       * returned by Calendar.getTimeInMillis()
       * @return an index from 0 to (DAY_COUNT - 1) that identifies which
       * date bin this date belongs to
       */
      public int getIndex(long time) {
          int lastDay = DAY_COUNT - 1;
          for (int i = 0; i < lastDay; i++) {
              if (time > mBins[i]) return i;
          }
          return lastDay;
      }
  
      /**
       * @param index date bin index as returned by getIndex()
       * @return string label suitable for display to user
       */
      public String getLabel(int index) {
          if (index < 0 || index >= DAY_COUNT) return "";
          return mLabels[index];
      }
  
  
      /**
       * @param index date bin index as returned by getIndex()
       * @return date boundary at given index
       */
      public long getBoundary(int index) {
          int lastDay = DAY_COUNT - 1;
          // Error case
          if (index < 0 || index > lastDay) index = 0;
          // Since this provides a lower boundary on dates that will be included
          // in the given bin, provide the smallest value
          if (index == lastDay) return Long.MIN_VALUE;
          return mBins[index];
      }
  
      /**
       * Calcuate 12:00am by zeroing out hour, minute, second, millisecond
       */
      private void beginningOfDay(Calendar c) {
          c.set(Calendar.HOUR_OF_DAY, 0);
          c.set(Calendar.MINUTE, 0);
          c.set(Calendar.SECOND, 0);
          c.set(Calendar.MILLISECOND, 0);
      }
  }
  