private async Task MergeApiToExternal(IReadOnlyList <Profile> profiles)
{
using (var cached = await _cachedProfiles.LockedProfileData())
{
var external = cached.External;
foreach (var profile in profiles)
{
var candidate = profile.WithStatus(ProfileStatus.Synced);
candidate.ModifiedAt = DateTime.UtcNow;
var existing = external.FirstOrDefault(p => ProfileByExternalIdEqualityComparer.Equals(p, profile));
if (existing == null)
{
var notSynced = cached.Local.FirstOrDefault(p =>
p.Status == ProfileStatus.Created &&
ProfileByEssentialPropertiesEqualityComparer.Equals(p, profile)) ??
cached.Sync.FirstOrDefault(p =>
p.Status == ProfileStatus.Created &&
ProfileByEssentialPropertiesEqualityComparer.Equals(p, profile));
if (notSynced != null)
{
candidate = candidate.WithIdFrom(notSynced);
cached.Local.Remove(notSynced);
cached.Sync.Remove(notSynced);
}
external.Add(candidate.WithSyncStatus(ProfileSyncStatus.Succeeded));
continue;
}
if (ProfileByPropertiesEqualityComparer.Equals(profile, existing))
{
continue;
}
candidate = candidate
.WithIdFrom(existing)
.WithSyncStatus(existing.SyncStatus);
external.AddOrReplace(candidate);
}
external
.Except(profiles, ProfileByExternalIdEqualityComparer)
.ToList()
.ForEach(external.Remove);
_changesSynced = _changesSynced || cached.HasChanges;
}
}
private async Task Skip(Profile profile)
{
using (var cached = await _cachedProfiles.LockedProfileData())
{
cached.Sync.Remove(profile);
}
}
private async Task AddOrReplaceLocal(Profile profile, ProfileStatus status)
{
using (var cached = await _cachedProfiles.LockedProfileData())
{
var local = cached.Local.Get(profile);
if (local?.Status == ProfileStatus.Created && status == ProfileStatus.Deleted)
{
cached.Local.Remove(local);
return;
}
var mapped = Map(profile)
.WithStatus(status)
.WithSyncStatus(ProfileSyncStatus.InProgress)
.WithModifiedAt(DateTime.UtcNow);
cached.Local.AddOrReplace(
mapped.WithStatusMergedFrom(local));
}
}
