Synchronize Content Between Two Pages

import com.atlassian.confluence.event.events.content.page.PageEvent
import com.atlassian.confluence.pages.PageManager
import com.atlassian.sal.api.component.ComponentLocator

def pageSource = '<PAGE_SOURCE_TITLE>'
def spaceDest = '<SPACE_DEST_KEY>'
def pageDest = '<PAGE_DEST_TITLE>'
def pageEvent = event as PageEvent

def pageManager = ComponentLocator.getComponent(PageManager)

//get page
def sourcePage = pageEvent.page
def destPage = pageManager.getPage(spaceDest, pageDest)

// check if destination page exist, if not return.
if ( !destPage ) {
    log.warn "Destination page with title '${pageDest}' not available on the '${spaceDest} space'"
    return
}

//get page body in source page
def sourcePageBody = sourcePage.bodyContent

// return if the page updated is not the pageSource.
if ( sourcePage.title != pageSource ) {
    return
}

pageManager.saveNewVersion( destPage ) { pageObject ->
    pageObject.setBodyContent(sourcePageBody)
}