public async Task <RelationListenResult> ListenAsync(RelationListenConfig listenConfig, Requester requester, CancellationToken token)
{
var result = new RelationListenResult()
{
lastId = listenConfig.lastId
};
var listenId = new RelationListener()
{
userId = requester.userId,
listenStatuses = listenConfig.statuses
};
var maxId = await provider.GetMaxAsync(await provider.GetQueryableAsync <EntityRelation>(), x => x.id);
if (result.lastId <= 0)
{
result.lastId = maxId + result.lastId; //plus because negative
}
//This SERIOUSLY requires INTIMATE knowledge of how each of these systems works, like what entityId1 means etc.
//That's bad.
result.Relations = await provider.ListenAsync <EntityRelation>(listenId, (q) =>
q.Where(x =>
(x.type == Keys.CommentHack ||
x.type == Keys.ModuleHack ||
x.type == Keys.WatchRelation && x.entityId1 == listenId.userId ||
(x.type == Keys.WatchUpdate ||
x.type == Keys.WatchDelete) && x.value.StartsWith($"{listenId.userId}_") ||
x.type.StartsWith(Keys.ActivityKey) ||
x.type.StartsWith(Keys.ModuleMessageKey) && (x.entityId2 == 0 || x.entityId2 == -listenId.userId) ||
x.type.StartsWith(Keys.CommentDeleteHack) ||
x.type.StartsWith(Keys.CommentHistoryHack)) &&
x.id > result.lastId &&
x.id < result.lastId + config.MaxLookahead),
systemConfig.ListenTimeout, token);
//If the read exited with NOTHING, there's nothing in our range. Need to record that
//so we don't check that range again. This will ALMOST NEVER EVER happen, but it's good to handle the situation.
//Yes, the listener will have to wait for the full timeout value to get anything, but... well it should be ok.
if (result.Relations == null || result.Relations.Count == 0)
{
result.lastId += config.MaxLookahead;
}
else
{
result.lastId = result.Relations.Max(x => x.id);
}
return(result);
}
public async Task <List <EntityRelation> > ListenAsync(RelationListenConfig listenConfig, Requester requester, CancellationToken token)
{
var listenId = new RelationListener()
{
userId = requester.userId,
listenStatuses = listenConfig.statuses
};
var maxId = await provider.GetMaxAsync(provider.GetQueryable <EntityRelation>(), x => x.id);
if (listenConfig.lastId <= 0)
{
listenConfig.lastId = maxId + listenConfig.lastId; //plus because negative
}
else if (maxId - listenConfig.lastId > 1000)
{
throw new BadRequestException($"LastID too far back! Perhaps restart your listener! System current max: {maxId}");
}
//This SERIOUSLY requires INTIMATE knowledge of how each of these systems works, like what entityId1 means etc.
//That's bad.
var results = await provider.ListenAsync <EntityRelation>(listenId, (q) =>
q.Where(x =>
(x.type == Keys.CommentHack ||
x.type == Keys.WatchRelation && x.entityId1 == listenId.userId ||
(x.type == Keys.WatchUpdate ||
x.type == Keys.WatchDelete) && x.value.StartsWith($"{listenId.userId}_") ||
x.type.StartsWith(Keys.ActivityKey) ||
x.type.StartsWith(Keys.ModuleMessageKey) && (x.entityId2 == 0 || x.entityId2 == -requester.userId) ||
x.type.StartsWith(Keys.CommentDeleteHack) ||
x.type.StartsWith(Keys.CommentHistoryHack)) &&
x.id > listenConfig.lastId),
systemConfig.ListenTimeout, token);
return(results);
}