Behavior to copy date field to subtask creation form

[Peter Garncarek]

I am trying to copy values from parent to subtask creation form and I can't figure out how to handle two date fields.  I am using this as a reference:

import com.atlassian.jira.component.ComponentAccessor

import com.atlassian.jira.config.properties.APKeys

import com.atlassian.jira.datetime.DateTimeFormatter as JiraDateTimeFormatter

import com.atlassian.jira.issue.customfields.impl.DateTimeCFType

import com.atlassian.jira.issue.fields.CustomField

import com.onresolve.jira.groovy.user.FieldBehaviours

import com.onresolve.jira.groovy.user.FormField

import com.atlassian.jira.user.ApplicationUser

import org.apache.log4j.Logger

import org.apache.log4j.Level

import groovy.transform.BaseScript

import java.time.LocalDate

import java.time.LocalDateTime

import java.time.ZoneId

import java.time.temporal.TemporalAccessor

import java.time.format.DateTimeFormatter

@BaseScript FieldBehaviours fieldBehaviours

// Set log level

def log = Logger.getLogger(getClass())

log.setLevel(Level.DEBUG)

// The date & date time field names to set a value

final dateFieldName = "Target start"

final dateTimeFieldName = "Target completion"

// Get the components

def customFieldManager = ComponentAccessor.customFieldManager

def authenticationContext = ComponentAccessor.jiraAuthenticationContext

// Get the Jira date time formatter for the logged in user, so we can get the correct locale and user timezone

def userFormatter = ComponentAccessor.getComponent(JiraDateTimeFormatter).forUser(authenticationContext.loggedInUser)

// Get the date & date time field objects

def dateField = customFieldManager.getCustomFieldObjectsByName(dateFieldName).first()

def dateTimeField = customFieldManager.getCustomFieldObjectsByName(dateTimeFieldName).first()

// Set the wanted dates params for values, format pattern and timezone to interpret the dates in

final timeZoneId = ZoneId.systemDefault()

final dateFormatter = DateTimeFormatter.ofPattern('yyyy/MM/dd')

final dateTimeFormatter = DateTimeFormatter.ofPattern('yyyy/MM/dd HH:mm:ss')

final wantedDateAsText = '2020/11/28'

final wantedDateTimeAsText = '2020/11/01 12:12:00'

// Parse the dates as interpreted in the chosen time zone and convert to the user time zone, to make sure the user sees the date in his time zone

def userTimeZoneId = userFormatter.zone.toZoneId()

def wantedDate = LocalDate.parse(wantedDateAsText, dateFormatter)

    .atStartOfDay(timeZoneId)

    .withZoneSameInstant(userTimeZoneId)

def wantedDateTime = LocalDateTime.parse(wantedDateTimeAsText, dateTimeFormatter)

    .atZone(timeZoneId)

    .withZoneSameInstant(userTimeZoneId)

// Populate the fields

//getFieldByName("Target start").setFormValue(getJiraDateFormattedForUser(wantedDate, dateField, userFormatter))

//getFieldByName("Target completion").setFormValue(getJiraDateFormattedForUser(wantedDateTime, dateTimeField, userFormatter))

/**

 * Get the date or date time values in the format expected by Jira an behaviours for fields

 * @Param inputDate The input date or date time to format

 * @Param sourceField The field object in which the value will be set

 * @Param dateTimeFormatter the Jira's date time formatter to extract the user's locale info

 * @return The formatted date time

 */

static String getJiraDateFormattedForUser(TemporalAccessor inputDate, CustomField sourceField, JiraDateTimeFormatter dateTimeFormatter) {

    // Get the Jira date format property key depending on the field type (date or date time)

    def dateFormatPatternProperty = (sourceField.customFieldType in DateTimeCFType) ? APKeys.JIRA_DATE_TIME_PICKER_JAVA_FORMAT : APKeys.JIRA_DATE_PICKER_JAVA_FORMAT

    // Get the format string, so we can format dates how Jira expects

    def dateFormatPattern = ComponentAccessor.applicationProperties.getDefaultBackedString(dateFormatPatternProperty)

    // Build the formatter object

    def formatterForFieldType = DateTimeFormatter.ofPattern(dateFormatPattern, dateTimeFormatter.locale)

    // Return the formatted date string that can be used to set date or date time fields

    formatterForFieldType.format(inputDate)

}

My 'Target start' and 'Target completion' fields get the values from these lines (as expected so logic works):

final wantedDateAsText = '2020/11/28'

final wantedDateTimeAsText = '2020/11/01 12:12:00'

def wantedDate = LocalDate.parse(wantedDateAsText, dateFormatter)

    .atStartOfDay(timeZoneId)

    .withZoneSameInstant(userTimeZoneId)

def wantedDateTime = LocalDateTime.parse(wantedDateTimeAsText, dateTimeFormatter)

    .atZone(timeZoneId)

    .withZoneSameInstant(userTimeZoneId)

 I can't figure out how to read the parent field date and make it functional for the 'wantedDate' variable.