Send e-mail

In this example, we will define a post function to send a custom Approve e-mail with Jira Service Desk. You can also use it as an example to send custom e-mails with Jira. Some notes about the script:

Please change ENVIRONMENT SPECIFIC VALUES according to your setup.
issue object is already attached to script, you can use it directly.
assetCustomFieldAndValueList is attached to script which holds asset custom field values with detailed assets information. See AssetCustomFieldAndValue for class details.
Screen has 2 asset custom fields and only asset names are sent as e-mail. Attributes can be fetched as well, for more info please see Sample Groovy Scripts
E-mail is sent to multi-select users custom field values, to send a single user custom field (i.e. reporter), please modify getRecipientEmails method: returns one e-mail and no need to have a loop for "toEmails".

import com.atlassian.jira.mail.Email
import com.atlassian.jira.user.ApplicationUser
import groovy.transform.Field
import inventoryplugin.entity.JipInventory
import inventoryplugin.workflow.function.genericscript.dto.AssetCustomFieldAndValue
import org.apache.commons.lang3.StringUtils

import java.text.DateFormat
import java.text.SimpleDateFormat

/********** ENVIRONMENT SPECIFIC VALUES: Change according to your environment ********/
@Field String portalId = '2';
@Field String approvalsCustomFieldId = 'customfield_10402';
@Field String assetCustomFieldName_1 = 'Assets';
@Field String assetCustomFieldName_2 = 'Assets2';
/*************************************************************************************/

String getJiraBaseUrl() {
    return ComponentAccessor.getApplicationProperties().getString("jira.baseurl")
}

String getIntro() {
    return '<div>This request created by ' + issue.getReporter().getDisplayName() + ' is awaiting approval.</div>'
}

String getCreateDateFormatted() {
    DateFormat dateFormat = new SimpleDateFormat("dd.MM.yyyy HH:mm");
    return dateFormat.format(issue.getCreated());
}

String getAssetCustomFieldText(fieldName) {
    List<String> assetNames = new ArrayList<>();
    for (AssetCustomFieldAndValue assetCustomFieldAndValues : assetCustomFieldAndValueList) {
        if (fieldName == assetCustomFieldAndValues.assetCustomField.fieldName) {
            for (JipInventory inventory : assetCustomFieldAndValues.getAssetList()) {
                assetNames.add(inventory.name) // ' #' + inventory.ID
            }
        }
    }
    return StringUtils.join(assetNames, ', ')
}

static String getField(fieldName, fieldValue) {
    return '<div style="padding-top: 20px;">' +
            '<div style="font-weight: bold;">' + fieldName + '</div>' +
            '<div>' + fieldValue + '</div>' +
            '</div>'
}

String getViewRequest() {
    def url = getJiraBaseUrl() + '/servicedesk/customer/portal/' + portalId + '/' + issue.getKey() + '?sda_source=notification-email';
    return '<a href="' + url + '">View request</a>';
}

// Create an email
def sendEmail(String emailAddr, String subject, String body) {
    def mailServer = ComponentAccessor.getMailServerManager().getDefaultSMTPMailServer()
    if (mailServer) {
        def email = new Email(emailAddr)
        email.setSubject(subject)
        email.setBody(body)
        email.setMimeType("text/html");
        mailServer.send(email)
        log.debug("Mail sent")
    } else {
        log.warn("Please make sure that a valid mailServer is configured")
    }
}

List<String> getRecipientEmails() {
    List<String> emails = new ArrayList<>();
    def cField = customFieldManager.getCustomFieldObject(approvalsCustomFieldId)
    Collection<ApplicationUser> usersList = issue.getCustomFieldValue(cField);
    for (ApplicationUser applicationUser : usersList) {
        emails.add(applicationUser.getEmailAddress());
    }
    return emails;
}

String messageBody = '<div style="font-family:verdana; font-size:14px">'

messageBody += getIntro();

messageBody += getField('Summary', issue.getSummary());
messageBody += getField(assetCustomFieldName_1, getAssetCustomFieldText(assetCustomFieldName_1));
messageBody += getField(assetCustomFieldName_2, getAssetCustomFieldText(assetCustomFieldName_2));
messageBody += getField('Created', getCreateDateFormatted());

messageBody += '<div style="padding-top: 20px">';
messageBody += '<span style="font-size: 16px; font-weight: bold;">' + getViewRequest() + '</span> to approve or decline.';
messageBody += '</div>';

messageBody += '<div style="padding-top: 20px">';
messageBody += '<span style="color:#7a869a; font-size:12px">Help Center, powered by <a href="' + getJiraBaseUrl() + '/servicedesk">Jira Service Desk</a>, sent you this message.</span>';
messageBody += '</div>';

messageBody += '</div>';

List<String> toEmails = getRecipientEmails();
for (String oneEmail : toEmails) {
    sendEmail(oneEmail, issue.getKey() + ' ' + issue.getSummary(), messageBody);
}

return messageBody;