Custom Event Listener

Adding a custom listener

  1. Navigate to General Configuration > ScriptRunner > Event Listeners. 

  2. Choose the Custom Event Listener to use your own scripts to respond to events.

  3. Enter an optional Name to identify your script. 

  4. Enter a Script, either Inline or from a File.
  5. Select Event(s) for the listener to fire on.
  6. Select Add.
    You can also Preview to view your results before saving the listener.

Writing code for custom event listeners

Script binding

The script binding is a set of variables you can use in your custom script. An event variable in the script binding corresponds to the event which triggered the listener. For example, if you are listening for PageCreateEvent the event variable will be a PageCreateEvent object.

Multiple Events

You can choose to have your handler listen for multiple events. If you need to do different things depending on the type of event, you can check that with instanceof. Alternatively, you can type the event variable to the most specific superclass. In the previous example, that would be PageEvent.

In the following example, the event is getting page content for both PageCreateEvent and PageUpdateEvent. Since PageEvent is a common superclass for both PageCreateEvent and PageUpdateEvent, you could cover both events by using the following code:

// The event is passed in the binding. This line is only used to give type information when using an IDE, and has no functional impact.
def event = event as PageEvent
def content = event.content.bodyAsString

// do something with the page content
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Examples

Add a comment when a banned word is used

Some organizations have a particular style guide or would like to enforce specific rules. This event listener example looks at the content of new pages for banned words. If the page content contains any on a list of banned words, a comment is automatically added with an alternative suggestion.

Follow these steps to create the listener:

  1. Navigate to General Configuration > ScriptRunner > Event Listeners. 
  2. Select Custom Event Listener.
  3. Enter Add a comment when a banned word is used for Name. 
  4. Enter the following Script: 
    import com.atlassian.confluence.event.events.content.page.PageEvent
import com.atlassian.confluence.pages.CommentManager
import com.atlassian.sal.api.component.ComponentLocator

def event = event as PageEvent
// use event.getPage().getSpace() if you want to restrict only to certain spaces

def commentManager = ComponentLocator.getComponent(CommentManager)
def body = event.content.bodyAsString

def alternatives = [
    "air hostess": "flight attendant",
    "amuck"      : "amok",
]

def commentBody = alternatives.findAll { badWord, goodWord ->
    body.contains(badWord)
}.collect { badWord, goodWord ->
    "<li><b>${badWord}</b> should be avoided. Consider using: <b>${goodWord}</b>.</li>"
}.join("")

if (commentBody) {
    commentManager.addCommentToObject(event.content, null, "<p>Please consider the following issues: <ul>$commentBody</ul> </p>")
}
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  5. Leave Events blank because the event is defined in the code.
  6. Select Add.

Result

The following image contains a comment generated in response to a banned word:

In practice, you would also want to watch page updates and only look at the diff between old and new versions.

Add an inline comment when a banned word is used

Similar to the previous example, you can configure your listener to add inline comments instead. As you get these comments, you can dismiss them.

Follow these steps to create the listener:

  1. Navigate to General Configuration > ScriptRunner > Event Listeners. 
  2. Select Custom Event Listener.
  3. Enter Add an inline comment when a banned word is used for Name. 
  4. Enter the following Script: 
    import com.atlassian.confluence.core.DefaultSaveContext
import com.atlassian.confluence.event.events.content.page.PageEvent
import com.atlassian.confluence.pages.CommentManager
import com.atlassian.confluence.plugins.highlight.SelectionStorageFormatModifier
import com.atlassian.confluence.plugins.highlight.model.TextSearch
import com.atlassian.confluence.plugins.highlight.model.XMLModification
import com.atlassian.sal.api.component.ComponentLocator
import com.onresolve.scriptrunner.runner.customisers.PluginModule
import com.onresolve.scriptrunner.runner.customisers.WithPlugin

import java.time.LocalDateTime

import com.atlassian.confluence.pages.Comment

def commentManager = ComponentLocator.getComponent(CommentManager)

@PluginModule
@WithPlugin("com.atlassian.confluence.plugins.confluence-highlight-actions")
SelectionStorageFormatModifier selectionStorageFormatModifier

event = event as PageEvent

def alternatives = [
    "air hostess": "flight attendant",
    "amuck"      : "amok",
]

/**
 * find occurrence of word in a String
 */
Integer keyFinder(String pageBody, String key) {
    def keyToFind = /$key/
    def keyFinder = (pageBody =~ /$keyToFind/)
    keyFinder.count
}

def inlineCommentMarker = { markerRef ->
    "<ac:inline-comment-marker ac:ref=\"${markerRef}\"></ac:inline-comment-marker>"
}

def commentTemplate = { String word ->
    "<p>Please use <b>${word}</b> instead</p>"
}

alternatives.each { badWord, goodWord ->
    def matches = keyFinder(event.content.bodyAsString, badWord)

    if (matches == 0) {
        log.warn("Word \"${badWord}\" not found.")
        return
    }

    (0..matches - 1).each { matchIndex ->
        def generatedMarkerRef = UUID.randomUUID().toString()

        // highlight text in the content
        selectionStorageFormatModifier.markSelection(
            event.page.id,
            event.timestamp,
            new TextSearch(badWord, matches, matchIndex),
            new XMLModification(inlineCommentMarker(generatedMarkerRef))
        )

        // add an inline comment related to the highlighted text
        def comment = commentManager.addCommentToObject(event.page, null, commentTemplate(goodWord)).tap {
            setInlineComment(true)
            delegate.getProperties().setStringProperty(Comment.MARKER_REF_PROP, generatedMarkerRef)
            delegate.getProperties().setStringProperty(Comment.ORIGINAL_SELECTION_PROP, badWord)
            setLastModificationDate(LocalDateTime.now().toDate())
        }
        commentManager.saveContentEntity(comment, DefaultSaveContext.DEFAULT)

        log.warn("Found word \"${badWord}\". Inline commented with word \"${goodWord}\"")
    }
}
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  5. Leave Events blank because the event is defined in the code.
  6. Select Add.

Result

The following image is an example of an inline comment:

Create a page in a space when a user is created

This event listener example automatically creates a user profile page in the Team space. You can use this profile page to list their skills and profile.

Follow these steps to create the listener:

  1. Navigate to General Configuration > ScriptRunner > Event Listeners. 
  2. Select Custom Event Listener.
  3. Enter Create a page in space when a user is created for Name. 
  4. Enter the following Script: 
    import com.atlassian.confluence.core.DefaultSaveContext
import com.atlassian.confluence.event.events.user.UserCreateEvent
import com.atlassian.confluence.pages.Page
import com.atlassian.confluence.pages.PageManager
import com.atlassian.confluence.spaces.SpaceManager
import com.atlassian.confluence.user.ConfluenceUser
import com.atlassian.sal.api.component.ComponentLocator
import groovy.xml.MarkupBuilder

try {
    def event = event as UserCreateEvent
    def user = event.user as ConfluenceUser
    def pageManager = ComponentLocator.getComponent(PageManager)

    def spaceManager = ComponentLocator.getComponent(SpaceManager)
    def teamSpace = spaceManager.getSpace("TEAM")

    def writer = new StringWriter()
    def builder = new MarkupBuilder(writer)
    builder.table {
        tbody {
            tr {
                td("About")
                td {
                    "ac:link" {
                        "ri:user"("ri:userkey": user.key)
                    }
                }
            }
            tr {
                td("Profile")
                td("")
            }
            tr {
                td("Skillz")
                td("")
            }
        }
    }

    def parentPage = teamSpace.getHomePage()
    assert parentPage

    def targetPage = new Page(title: "About ${user.fullName}",
        bodyAsString: writer.toString(),
        space: teamSpace,
        parentPage: parentPage
    )
    pageManager.saveContentEntity(targetPage, DefaultSaveContext.DEFAULT)
    parentPage.addChild(targetPage)
    pageManager.saveContentEntity(parentPage, DefaultSaveContext.MINOR_EDIT)
}
catch (anyException) {
    log.warn("Failed to create page for new user", anyException)
}
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  5. Pick UserCreateEvent for Events.
  6. Select Add.

Result

The following image is an example of a profile page created when the jbloggs user is created:

Collect stats

This event listener example automatically sends statistics to statsd for page views, space views, and users/pages views.

Follow these steps to create the listener:

  1. Navigate to General Configuration > ScriptRunner > Event Listeners. 
  2. Select Custom Event Listener.
  3. Enter Collect stats for Name. 
  4. Enter the following Script: 
    import com.atlassian.confluence.event.events.content.page.PageEvent
import com.atlassian.confluence.user.AuthenticatedUserThreadLocal
import groovy.transform.Field

@Field final def host = "http://192.168.59.103/"
@Field final def port = 8125

def event = event as PageEvent
def currentUser = AuthenticatedUserThreadLocal.get()

// keys to create unique nodes for counters
def spaceKey = event.page.spaceKey
def pageId = event.page.id as String
def userKey = currentUser.name
def nodeId = "confluence.stats.views"

// build the unique metric keys
def pageViewMetricKey = "${nodeId}.page.${pageId}"
def spaceViewMetricKey = "${nodeId}.space.${spaceKey}"
def userViewMetricKey = "${nodeId}.user.${userKey}.${pageId}"

// increase by one the counters for the following metric keys
increaseByOne(pageViewMetricKey, userViewMetricKey, spaceViewMetricKey)

void increaseByOne(String... keys) {
    def dataToSend = ""
    def value = 1 //increase counter by one

    //syntax for counter according to https://github.com/etsy/statsd/blob/master/docs/metric_types.md
    for (key in keys) {
        dataToSend += "${key}:${value}|c\n"
    }

    def data = dataToSend.getBytes()
    def address = InetAddress.getByName(host as String)
    def packet = new DatagramPacket(data, data.length, address, port as int)
    def socket = new DatagramSocket()
    try {
        socket.send(packet)
    } finally {
        socket.close()
    }
}
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  5. Pick PageViewEvent for Events.
  6. Select Add.

Result

The following image is an example of the statistics for page views:

In the example, Grafana is used to visualize page views metrics.
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