public static void ProcessChanges(string listID, ChangeToken lastChangeToken, DurableOrchestrationClient client, ILogger log)
{
using (var cc = new OfficeDevPnP.Core.AuthenticationManager().GetAppOnlyAuthenticatedContext(ConfigurationManager.AppSettings["siteUrl"], ConfigurationManager.AppSettings["clientId"], ConfigurationManager.AppSettings["clientSecret"]))
{
ChangeQuery changeQuery = new ChangeQuery(false, false);
changeQuery.Item = true;
changeQuery.Update = true; // could handle deletes too. Just need to know if approve or reject is assumed
changeQuery.ChangeTokenStart = lastChangeToken;
List changedList = cc.Web.GetListById(new Guid(listID));
var changes = changedList.GetChanges(changeQuery);
cc.Load(changes);
cc.ExecuteQuery();
foreach (Change change in changes)
{
if (change is ChangeItem)
{
ListItem task = changedList.GetItemById((change as ChangeItem).ItemId);
ListItemVersionCollection taskVersions = task.Versions;
cc.Load(taskVersions);
cc.Load(task);
cc.ExecuteQuery();
if (taskVersions.Count < 2)
{
return;
}
var currentStatus = (string)taskVersions[0]["Status"];
var priorStatus = (string)taskVersions[1]["Status"];
string wfid = (string)task["workflowId"];
Console.WriteLine($"Item # ${task.Id} current status is ${currentStatus} Prior status is ${priorStatus}");
switch ((string)task["Action"])
{
case "DocOwnerApproval":
if (currentStatus != priorStatus)
{
if (currentStatus == "Approve")
{
log.LogInformation("Sending event DocOwnerApproved");
client.RaiseEventAsync(wfid, "DocOwnerApproved");
}
else
{
log.LogInformation("Sending event DocOwnerRejected");
client.RaiseEventAsync(wfid, "DocOwnerRejected");
}
}
break;
case "StakeHolderApproval":
if (currentStatus != priorStatus)
{
if (currentStatus == "Approve")
{
var eventName = "StakeHolderApproval:" + ((FieldUserValue)task["AssignedTo"]).LookupId;
log.LogInformation($"Sending event '${eventName}'");
client.RaiseEventAsync(wfid, eventName, true);
}
else
{
log.LogInformation($"Sending event 'StakeHolderRejection'");
client.RaiseEventAsync(wfid, "StakeHolderRejection");
}
}
break;
}
}
}
};
}