from Products.CMFCore.utils import getToolByName
from Products.CMFPlone import PloneMessageFactory as _

def checkMemoryTextLength(self, info):
    object = info.object
    memtool = getToolByName(self, 'memories_tool')
    putils = getToolByName(self, 'plone_utils')
    pworkflow = getToolByName(self, 'portal_workflow')
    siteprops = getToolByName(self, 'portal_properties').site_properties
    
    if object.meta_type == 'GeoLocation':
        # Allowed characters per one memory text
        memory_allowed_characters = siteprops.getProperty('memory_allowed_length', None)
        if not memory_allowed_characters:
            memory_allowed_characters = 4500
        # This memory text has characters
        memory_has_characters = memtool.givePlainTextCharactersNumber(object.getText())
        if memory_has_characters < memory_allowed_characters:
            pass
        else:
            # The state should be changed back to private
            pworkflow.doActionFor(object, 'retract', comment='Memory text is too long.')
            # Tell the user about the action
            message = _(u'Your memory has ${has_chars} characters. Your memory can not be published until it has less than ${allowed_characters}.', mapping={u'has_chars':memory_has_characters,u'allowed_characters':memory_allowed_characters})
            putils.addPortalMessage(message, type='warning')