tasks/app/src/main/java/com/todoroo/astrid/api/PermaSql.java

/*
 * Copyright (c) 2012 Todoroo Inc
 *
 * See the file "LICENSE" for the full license governing this code.
 */

package com.todoroo.astrid.api;

import static org.tasks.date.DateTimeUtils.newDateTime;
import static org.tasks.time.DateTimeUtils2.currentTimeMillis;

import com.todoroo.andlib.utility.DateUtilities;
import org.tasks.time.DateTime;

/**
 * PermaSql allows for creating SQL statements that can be saved and used later without dates
 * getting stale. It also allows these values to be used in
 *
 * @author Tim Su <tim@todoroo.com>
 */
public final class PermaSql {

  // --- placeholder strings

  /** value to be replaced by end of day as long */
  public static final String VALUE_EOD = "EOD()"; // $NON-NLS-1$
  /** value to be replaced by noon today as long */
  public static final String VALUE_NOON = "NOON()"; // $NON-NLS-1$
  /** value to be replaced by end of day yesterday as long */
  public static final String VALUE_EOD_YESTERDAY = "EODY()"; // $NON-NLS-1$
  /** value to be replaced by end of day tomorrow as long */
  public static final String VALUE_EOD_TOMORROW = "EODT()"; // $NON-NLS-1$
  /** value to be replaced by end of day day after tomorrow as long */
  public static final String VALUE_EOD_DAY_AFTER = "EODTT()"; // $NON-NLS-1$
  /** value to be replaced by end of day next week as long */
  public static final String VALUE_EOD_NEXT_WEEK = "EODW()"; // $NON-NLS-1$
  /** value to be replaced by approximate end of day next month as long */
  public static final String VALUE_EOD_NEXT_MONTH = "EODM()"; // $NON-NLS-1$
  /** value to be replaced with the current time as long */
  public static final String VALUE_NOW = "NOW()"; // $NON-NLS-1$
  /** value to be replaced by noon yesterday as long */
  private static final String VALUE_NOON_YESTERDAY = "NOONY()"; // $NON-NLS-1$
  /** value to be replaced by noon tomorrow as long */
  private static final String VALUE_NOON_TOMORROW = "NOONT()"; // $NON-NLS-1$
  /** value to be replaced by noon day after tomorrow as long */
  private static final String VALUE_NOON_DAY_AFTER = "NOONTT()"; // $NON-NLS-1$
  /** value to be replaced by noon next week as long */
  private static final String VALUE_NOON_NEXT_WEEK = "NOONW()"; // $NON-NLS-1$
  /** value to be replaced by approximate noon next month as long */
  private static final String VALUE_NOON_NEXT_MONTH = "NOONM()"; // $NON-NLS-1$

  /** Replace placeholder strings with actual */
  public static String replacePlaceholdersForQuery(String value) {
    if (value.contains(VALUE_NOW)) {
      value = value.replace(VALUE_NOW, Long.toString(currentTimeMillis()));
    }
    if (value.contains(VALUE_EOD)
        || value.contains(VALUE_EOD_DAY_AFTER)
        || value.contains(VALUE_EOD_NEXT_WEEK)
        || value.contains(VALUE_EOD_TOMORROW)
        || value.contains(VALUE_EOD_YESTERDAY)
        || value.contains(VALUE_EOD_NEXT_MONTH)) {
      value = replaceEodValues(value);
    }
    if (value.contains(VALUE_NOON)
        || value.contains(VALUE_NOON_DAY_AFTER)
        || value.contains(VALUE_NOON_NEXT_WEEK)
        || value.contains(VALUE_NOON_TOMORROW)
        || value.contains(VALUE_NOON_YESTERDAY)
        || value.contains(VALUE_NOON_NEXT_MONTH)) {
      value = replaceNoonValues(value);
    }
    return value;
  }

  public static String replacePlaceholdersForNewTask(String value) {
    if (value.contains(VALUE_NOW)) {
      value = value.replace(VALUE_NOW, Long.toString(currentTimeMillis()));
    }
    if (value.contains(VALUE_EOD)
        || value.contains(VALUE_EOD_DAY_AFTER)
        || value.contains(VALUE_EOD_NEXT_WEEK)
        || value.contains(VALUE_EOD_TOMORROW)
        || value.contains(VALUE_EOD_YESTERDAY)
        || value.contains(VALUE_EOD_NEXT_MONTH)) {
      value = replaceEodValues(value, newDateTime().noon());
    }
    if (value.contains(VALUE_NOON)
        || value.contains(VALUE_NOON_DAY_AFTER)
        || value.contains(VALUE_NOON_NEXT_WEEK)
        || value.contains(VALUE_NOON_TOMORROW)
        || value.contains(VALUE_NOON_YESTERDAY)
        || value.contains(VALUE_NOON_NEXT_MONTH)) {
      value = replaceNoonValues(value);
    }
    return value;
  }

  private static String replaceEodValues(String value) {
    return replaceEodValues(value, newDateTime().endOfDay());
  }

  private static String replaceEodValues(String value, DateTime dateTime) {
    long time = dateTime.getMillis();
    value = value.replace(VALUE_EOD_YESTERDAY, Long.toString(time - DateUtilities.ONE_DAY));
    value = value.replace(VALUE_EOD, Long.toString(time));
    value = value.replace(VALUE_EOD_TOMORROW, Long.toString(time + DateUtilities.ONE_DAY));
    value = value.replace(VALUE_EOD_DAY_AFTER, Long.toString(time + 2 * DateUtilities.ONE_DAY));
    value = value.replace(VALUE_EOD_NEXT_WEEK, Long.toString(time + 7 * DateUtilities.ONE_DAY));
    value = value.replace(VALUE_EOD_NEXT_MONTH, Long.toString(time + 30 * DateUtilities.ONE_DAY));
    return value;
  }

  private static String replaceNoonValues(String value) {
    long time = newDateTime().noon().getMillis();
    value = value.replace(VALUE_NOON_YESTERDAY, Long.toString(time - DateUtilities.ONE_DAY));
    value = value.replace(VALUE_NOON, Long.toString(time));
    value = value.replace(VALUE_NOON_TOMORROW, Long.toString(time + DateUtilities.ONE_DAY));
    value = value.replace(VALUE_NOON_DAY_AFTER, Long.toString(time + 2 * DateUtilities.ONE_DAY));
    value = value.replace(VALUE_NOON_NEXT_WEEK, Long.toString(time + 7 * DateUtilities.ONE_DAY));
    value = value.replace(VALUE_NOON_NEXT_MONTH, Long.toString(time + 30 * DateUtilities.ONE_DAY));
    return value;
  }
}