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344
qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/scheduler/CronDescriber.java Normal file
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/*
* QQQ - Low-code Application Framework for Engineers.
* Copyright (C) 2021-2025. Kingsrook, LLC
* 651 N Broad St Ste 205 # 6917 | Middletown DE 19709 | United States
* contact@kingsrook.com
* https://github.com/Kingsrook/
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package com.kingsrook.qqq.backend.core.scheduler;
import java.text.ParseException;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/*******************************************************************************
** class to give a human-friendly descriptive string from a cron expression.
** (written in half by my friend Mr. Chatty G)
*******************************************************************************/
public class CronDescriber
{
private static final Map<String, String> DAY_OF_WEEK_MAP = new HashMap<>();
private static final Map<String, String> MONTH_MAP = new HashMap<>();
static
{
DAY_OF_WEEK_MAP.put("1", "Sunday");
DAY_OF_WEEK_MAP.put("2", "Monday");
DAY_OF_WEEK_MAP.put("3", "Tuesday");
DAY_OF_WEEK_MAP.put("4", "Wednesday");
DAY_OF_WEEK_MAP.put("5", "Thursday");
DAY_OF_WEEK_MAP.put("6", "Friday");
DAY_OF_WEEK_MAP.put("7", "Saturday");
////////////////////////////////
// Quartz also allows SUN-SAT //
////////////////////////////////
DAY_OF_WEEK_MAP.put("SUN", "Sunday");
DAY_OF_WEEK_MAP.put("MON", "Monday");
DAY_OF_WEEK_MAP.put("TUE", "Tuesday");
DAY_OF_WEEK_MAP.put("WED", "Wednesday");
DAY_OF_WEEK_MAP.put("THU", "Thursday");
DAY_OF_WEEK_MAP.put("FRI", "Friday");
DAY_OF_WEEK_MAP.put("SAT", "Saturday");
MONTH_MAP.put("1", "January");
MONTH_MAP.put("2", "February");
MONTH_MAP.put("3", "March");
MONTH_MAP.put("4", "April");
MONTH_MAP.put("5", "May");
MONTH_MAP.put("6", "June");
MONTH_MAP.put("7", "July");
MONTH_MAP.put("8", "August");
MONTH_MAP.put("9", "September");
MONTH_MAP.put("10", "October");
MONTH_MAP.put("11", "November");
MONTH_MAP.put("12", "December");
////////////////////////////////
// Quartz also allows JAN-DEC //
////////////////////////////////
MONTH_MAP.put("JAN", "January");
MONTH_MAP.put("FEB", "February");
MONTH_MAP.put("MAR", "March");
MONTH_MAP.put("APR", "April");
MONTH_MAP.put("MAY", "May");
MONTH_MAP.put("JUN", "June");
MONTH_MAP.put("JUL", "July");
MONTH_MAP.put("AUG", "August");
MONTH_MAP.put("SEP", "September");
MONTH_MAP.put("OCT", "October");
MONTH_MAP.put("NOV", "November");
MONTH_MAP.put("DEC", "December");
}
/***************************************************************************
**
***************************************************************************/
public static String getDescription(String cronExpression) throws ParseException
{
String[] parts = cronExpression.split("\\s+");
if(parts.length < 6 || parts.length > 7)
{
throw new ParseException("Invalid cron expression: " + cronExpression, 0);
}
String seconds = parts[0];
String minutes = parts[1];
String hours = parts[2];
String dayOfMonth = parts[3];
String month = parts[4];
String dayOfWeek = parts[5];
String year = parts.length == 7 ? parts[6] : "*";
StringBuilder description = new StringBuilder();
description.append("At ");
description.append(describeTime(seconds, minutes, hours));
description.append(", on ");
description.append(describeDayOfMonth(dayOfMonth));
description.append(" of ");
description.append(describeMonth(month));
description.append(", ");
description.append(describeDayOfWeek(dayOfWeek));
if(!year.equals("*"))
{
description.append(", in ").append(year);
}
description.append(".");
return description.toString();
}
/***************************************************************************
**
***************************************************************************/
private static String describeTime(String seconds, String minutes, String hours)
{
return String.format("%s, %s, %s", describePart(seconds, "second"), describePart(minutes, "minute"), describePart(hours, "hour"));
}
/***************************************************************************
**
***************************************************************************/
private static String describeDayOfMonth(String dayOfMonth)
{
if(dayOfMonth.equals("?"))
{
return "every day";
}
else if(dayOfMonth.equals("L"))
{
return "the last day";
}
else if(dayOfMonth.contains("W"))
{
return "the nearest weekday to day " + dayOfMonth.replace("W", "");
}
else
{
return (describePart(dayOfMonth, "day"));
}
}
/***************************************************************************
**
***************************************************************************/
private static String describeMonth(String month)
{
if(month.equals("*"))
{
return "every month";
}
else
{
String[] months = month.split(",");
StringBuilder result = new StringBuilder();
for(String m : months)
{
result.append(MONTH_MAP.getOrDefault(m, m)).append(", ");
}
return result.substring(0, result.length() - 2);
}
}
/***************************************************************************
**
***************************************************************************/
private static String describeDayOfWeek(String dayOfWeek)
{
if(dayOfWeek.equals("?"))
{
return "every day of the week";
}
else if(dayOfWeek.equals("L"))
{
return "the last day of the week";
}
else if(dayOfWeek.contains("#"))
{
String[] parts = dayOfWeek.split("#");
return String.format("the %s %s of the month", ordinal(parts[1]), DAY_OF_WEEK_MAP.getOrDefault(parts[0], parts[0]));
}
else if(dayOfWeek.contains("-"))
{
String[] parts = dayOfWeek.split("-");
return String.format("from %s to %s", DAY_OF_WEEK_MAP.getOrDefault(parts[0], parts[0]), DAY_OF_WEEK_MAP.getOrDefault(parts[1], parts[1]));
}
else
{
String[] days = dayOfWeek.split(",");
StringBuilder result = new StringBuilder();
for(String d : days)
{
result.append(DAY_OF_WEEK_MAP.getOrDefault(d, d)).append(", ");
}
return result.substring(0, result.length() - 2);
}
}
/***************************************************************************
**
***************************************************************************/
private static String describePart(String part, String label)
{
if(part.equals("*"))
{
return "every " + label;
}
else if(part.contains("/"))
{
String[] parts = part.split("/");
if(parts[0].equals("*"))
{
parts[0] = "0";
}
return String.format("every %s " + label + "s starting at %s", parts[1], parts[0]);
}
else if(part.contains(","))
{
if(label.equals("hour"))
{
String[] parts = part.split(",");
List<String> partList = Arrays.stream(parts).map(p -> hourToAmPm(p)).toList();
return String.join(", ", partList);
}
else
{
if(label.equals("day"))
{
return "days " + part.replace(",", ", ");
}
else
{
return part.replace(",", ", ") + " " + label + "s";
}
}
}
else if(part.contains("-"))
{
String[] parts = part.split("-");
if(label.equals("day"))
{
return String.format("%ss from %s to %s", label, parts[0], parts[1]);
}
else if(label.equals("hour"))
{
return String.format("from %s to %s", hourToAmPm(parts[0]), hourToAmPm(parts[1]));
}
else
{
return String.format("from %s to %s %s", parts[0], parts[1], label + "s");
}
}
else
{
if(label.equals("day"))
{
return label + " " + part;
}
if(label.equals("hour"))
{
return hourToAmPm(part);
}
else
{
return part + " " + label + "s";
}
}
}
/***************************************************************************
**
***************************************************************************/
private static String hourToAmPm(String part)
{
try
{
int hour = Integer.parseInt(part);
return switch(hour)
{
case 0 -> "midnight";
case 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 -> hour + " AM";
case 12 -> "noon";
case 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 -> (hour - 12) + " PM";
default -> hour + " hours";
};
}
catch(Exception e)
{
return part + " hours";
}
}
/***************************************************************************
**
***************************************************************************/
private static String ordinal(String number)
{
int n = Integer.parseInt(number);
if(n >= 11 && n <= 13)
{
return n + "th";
}
return switch(n % 10)
{
case 1 -> n + "st";
case 2 -> n + "nd";
case 3 -> n + "rd";
default -> n + "th";
};
}
}

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qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/scheduler/CronExpressionTooltipFieldBehavior.java Normal file
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/*
* QQQ - Low-code Application Framework for Engineers.
* Copyright (C) 2021-2025. Kingsrook, LLC
* 651 N Broad St Ste 205 # 6917 | Middletown DE 19709 | United States
* contact@kingsrook.com
* https://github.com/Kingsrook/
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package com.kingsrook.qqq.backend.core.scheduler;
import java.util.List;
import com.kingsrook.qqq.backend.core.actions.values.ValueBehaviorApplier;
import com.kingsrook.qqq.backend.core.model.data.QRecord;
import com.kingsrook.qqq.backend.core.model.metadata.QInstance;
import com.kingsrook.qqq.backend.core.model.metadata.fields.AdornmentType;
import com.kingsrook.qqq.backend.core.model.metadata.fields.FieldAdornment;
import com.kingsrook.qqq.backend.core.model.metadata.fields.FieldDisplayBehavior;
import com.kingsrook.qqq.backend.core.model.metadata.fields.QFieldMetaData;
import com.kingsrook.qqq.backend.core.model.metadata.tables.QTableMetaData;
import com.kingsrook.qqq.backend.core.utils.StringUtils;
/*******************************************************************************
** Field display behavior, to add a human-redable tooltip to cron-expressions.
*******************************************************************************/
public class CronExpressionTooltipFieldBehavior implements FieldDisplayBehavior<CronExpressionTooltipFieldBehavior>
{
/***************************************************************************
** Add both this behavior, and the tooltip adornment to a field
** Note, if either was already there, then that part is left alone.
***************************************************************************/
public static void addToField(QFieldMetaData fieldMetaData)
{
CronExpressionTooltipFieldBehavior existingBehavior = fieldMetaData.getBehaviorOnlyIfSet(CronExpressionTooltipFieldBehavior.class);
if(existingBehavior == null)
{
fieldMetaData.withBehavior(new CronExpressionTooltipFieldBehavior());
}
if(fieldMetaData.getAdornment(AdornmentType.TOOLTIP).isEmpty())
{
fieldMetaData.withFieldAdornment((new FieldAdornment(AdornmentType.TOOLTIP)
.withValue(AdornmentType.TooltipValues.TOOLTIP_DYNAMIC, true)));
}
}
/***************************************************************************
**
***************************************************************************/
@Override
public void apply(ValueBehaviorApplier.Action action, List<QRecord> recordList, QInstance instance, QTableMetaData table, QFieldMetaData field)
{
for(QRecord record : recordList)
{
try
{
String cronExpression = record.getValueString(field.getName());
if(StringUtils.hasContent(cronExpression))
{
String description = CronDescriber.getDescription(cronExpression);
record.setDisplayValue(field.getName() + ":" + AdornmentType.TooltipValues.TOOLTIP_DYNAMIC, description);
}
}
catch(Exception e)
{
/////////////////////
// just leave null //
/////////////////////
}
}
}
}

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qqq-backend-core/src/test/java/com/kingsrook/qqq/backend/core/scheduler/CronDescriberTest.java Normal file
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/*
* QQQ - Low-code Application Framework for Engineers.
* Copyright (C) 2021-2025. Kingsrook, LLC
* 651 N Broad St Ste 205 # 6917 | Middletown DE 19709 | United States
* contact@kingsrook.com
* https://github.com/Kingsrook/
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package com.kingsrook.qqq.backend.core.scheduler;
import java.text.ParseException;
import com.kingsrook.qqq.backend.core.BaseTest;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
/*******************************************************************************
** Unit test for CronDescriber
*******************************************************************************/
class CronDescriberTest extends BaseTest
{
/*******************************************************************************
**
*******************************************************************************/
@Test
void test() throws ParseException
{
assertEquals("At every second, every minute, every hour, on every day of every month, every day of the week.", CronDescriber.getDescription("* * * * * ?"));
assertEquals("At 0 seconds, every minute, every hour, on every day of every month, every day of the week.", CronDescriber.getDescription("0 * * * * ?"));
assertEquals("At 0 seconds, 0 minutes, every hour, on every day of every month, every day of the week.", CronDescriber.getDescription("0 0 * * * ?"));
assertEquals("At 0 seconds, 0, 30 minutes, every hour, on every day of every month, every day of the week.", CronDescriber.getDescription("0 0,30 * * * ?"));
assertEquals("At 0 seconds, 0 minutes, midnight, on every day of every month, every day of the week.", CronDescriber.getDescription("0 0 0 * * ?"));
assertEquals("At 0 seconds, 0 minutes, 1 AM, on every day of every month, every day of the week.", CronDescriber.getDescription("0 0 1 * * ?"));
assertEquals("At 0 seconds, 0 minutes, 11 AM, on every day of every month, every day of the week.", CronDescriber.getDescription("0 0 11 * * ?"));
assertEquals("At 0 seconds, 0 minutes, noon, on every day of every month, every day of the week.", CronDescriber.getDescription("0 0 12 * * ?"));
assertEquals("At 0 seconds, 0 minutes, 1 PM, on every day of every month, every day of the week.", CronDescriber.getDescription("0 0 13 * * ?"));
assertEquals("At 0 seconds, 0 minutes, 11 PM, on every day of every month, every day of the week.", CronDescriber.getDescription("0 0 23 * * ?"));
assertEquals("At 0 seconds, 0 minutes, midnight, on day 10 of every month, every day of the week.", CronDescriber.getDescription("0 0 0 10 * ?"));
assertEquals("At 0 seconds, 0 minutes, midnight, on days 10, 20 of every month, every day of the week.", CronDescriber.getDescription("0 0 0 10,20 * ?"));
assertEquals("At 0 seconds, 0 minutes, midnight, on days from 10 to 15 of every month, every day of the week.", CronDescriber.getDescription("0 0 0 10-15 * ?"));
assertEquals("At from 10 to 15 seconds, 0 minutes, midnight, on every day of every month, every day of the week.", CronDescriber.getDescription("10-15 0 0 * * ?"));
assertEquals("At 30 seconds, 30 minutes, from 8 AM to 4 PM, on every day of every month, every day of the week.", CronDescriber.getDescription("30 30 8-16 * * ?"));
assertEquals("At 0 seconds, 0 minutes, midnight, on every 3 days starting at 0 of every month, every day of the week.", CronDescriber.getDescription("0 0 0 */3 * ?"));
assertEquals("At every 5 seconds starting at 0, 0 minutes, midnight, on every day of every month, every day of the week.", CronDescriber.getDescription("0/5 0 0 * * ?"));
assertEquals("At 0 seconds, every 30 minutes starting at 3, midnight, on every day of every month, every day of the week.", CronDescriber.getDescription("0 3/30 0 * * ?"));
assertEquals("At 0 seconds, 0 minutes, midnight, on every day of every month, Monday, Wednesday, Friday.", CronDescriber.getDescription("0 0 0 * * MON,WED,FRI"));
assertEquals("At 0 seconds, 0 minutes, midnight, on every day of every month, from Monday to Friday.", CronDescriber.getDescription("0 0 0 * * MON-FRI"));
assertEquals("At 0 seconds, 0 minutes, midnight, on every day of every month, Sunday, Saturday.", CronDescriber.getDescription("0 0 0 * * 1,7"));
assertEquals("At 0 seconds, 0 minutes, 2 AM, 6 AM, noon, 4 PM, 8 PM, on every day of every month, every day of the week.", CronDescriber.getDescription("0 0 2,6,12,16,20 * * ?"));
assertEquals("??", CronDescriber.getDescription("0/5 14,18,3-39,52 * ? JAN,MAR,SEP MON-FRI 2002-2010"));
}
}

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qqq-backend-core/src/test/java/com/kingsrook/qqq/backend/core/scheduler/CronExpressionTooltipFieldBehaviorTest.java Normal file
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/*
* QQQ - Low-code Application Framework for Engineers.
* Copyright (C) 2021-2025. Kingsrook, LLC
* 651 N Broad St Ste 205 # 6917 | Middletown DE 19709 | United States
* contact@kingsrook.com
* https://github.com/Kingsrook/
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package com.kingsrook.qqq.backend.core.scheduler;
import com.kingsrook.qqq.backend.core.BaseTest;
import com.kingsrook.qqq.backend.core.actions.tables.GetAction;
import com.kingsrook.qqq.backend.core.actions.tables.InsertAction;
import com.kingsrook.qqq.backend.core.context.QContext;
import com.kingsrook.qqq.backend.core.exceptions.QException;
import com.kingsrook.qqq.backend.core.model.actions.tables.get.GetInput;
import com.kingsrook.qqq.backend.core.model.actions.tables.insert.InsertInput;
import com.kingsrook.qqq.backend.core.model.data.QRecord;
import com.kingsrook.qqq.backend.core.model.metadata.fields.AdornmentType;
import com.kingsrook.qqq.backend.core.model.metadata.fields.QFieldMetaData;
import com.kingsrook.qqq.backend.core.model.metadata.fields.QFieldType;
import com.kingsrook.qqq.backend.core.utils.TestUtils;
import org.junit.jupiter.api.Test;
import static org.assertj.core.api.Assertions.assertThat;
/*******************************************************************************
** Unit test for CronExpressionTooltipFieldBehavior
*******************************************************************************/
class CronExpressionTooltipFieldBehaviorTest extends BaseTest
{
/*******************************************************************************
**
*******************************************************************************/
@Test
void test() throws QException
{
QFieldMetaData field = new QFieldMetaData("cronExpression", QFieldType.STRING);
QContext.getQInstance().getTable(TestUtils.TABLE_NAME_SHAPE)
.addField(field);
CronExpressionTooltipFieldBehavior.addToField(field);
new InsertAction().execute(new InsertInput(TestUtils.TABLE_NAME_SHAPE).withRecord(
new QRecord().withValue("name", "Square").withValue("cronExpression", "* * * * * ?")));
QRecord record = new GetAction().executeForRecord(new GetInput(TestUtils.TABLE_NAME_SHAPE).withPrimaryKey(1).withShouldGenerateDisplayValues(true));
assertThat(record.getDisplayValue("cronExpression:" + AdornmentType.TooltipValues.TOOLTIP_DYNAMIC))
.contains("every second");
}
}