public async Task ImportForeignBayOwners(WRLDCWarehouseDbContext _context, ILogger _log, string oracleConnStr, EntityWriteOption opt)
{
BayOwnerExtract bayOwnerExtract = new BayOwnerExtract();
List <BayOwnerForeign> bayOwnersForeign = bayOwnerExtract.ExtractBayOwnersForeign(oracleConnStr);
LoadBayOwner loadBayOwner = new LoadBayOwner();
foreach (BayOwnerForeign bayOwnerForeign in bayOwnersForeign)
{
BayOwner insertedBayOwner = await loadBayOwner.LoadSingleAsync(_context, _log, bayOwnerForeign, opt);
}
}
public async Task <BayOwner> LoadSingleAsync(WRLDCWarehouseDbContext _context, ILogger _log, BayOwnerForeign bayOwnerForeign, EntityWriteOption opt)
{
// check if entity already exists
BayOwner existingBayOwner = await _context.BayOwners.SingleOrDefaultAsync(brO => brO.WebUatId == bayOwnerForeign.WebUatId);
// check if we should not modify existing entities
if (opt == EntityWriteOption.DontReplace && existingBayOwner != null)
{
return(existingBayOwner);
}
// find the bay via the BayWebUatId
int bayWebUatId = bayOwnerForeign.BayWebUatId;
Bay bay = await _context.Bays.SingleOrDefaultAsync(b => b.WebUatId == bayWebUatId);
// if Bay doesnot exist, skip the import. Ideally, there should not be such case
if (bay == null)
{
_log.LogCritical($"Unable to find Bay with webUatId {bayWebUatId} while inserting BayOwner with webUatId {bayOwnerForeign.WebUatId}");
return(null);
}
// find the Owner of the Bay via the Owner WebUatId
int ownerWebUatId = bayOwnerForeign.OwnerWebUatId;
Owner owner = await _context.Owners.SingleOrDefaultAsync(o => o.WebUatId == ownerWebUatId);
// if owner doesnot exist, skip the import. Ideally, there should not be such case
if (owner == null)
{
_log.LogCritical($"Unable to find Owner with webUatId {ownerWebUatId} while inserting BayOwner with webUatId {bayOwnerForeign.WebUatId}");
return(null);
}
// check if we have to replace the entity completely
if (opt == EntityWriteOption.Replace && existingBayOwner != null)
{
_context.BayOwners.Remove(existingBayOwner);
}
// if entity is not present, then insert or check if we have to replace the entity completely
if (existingBayOwner == null || (opt == EntityWriteOption.Replace && existingBayOwner != null))
{
BayOwner newBayOwner = new BayOwner();
newBayOwner.OwnerId = owner.OwnerId;
newBayOwner.BayId = bay.BayId;
newBayOwner.WebUatId = bayOwnerForeign.WebUatId;
_context.BayOwners.Add(newBayOwner);
await _context.SaveChangesAsync();
return(newBayOwner);
}
// check if we have to modify the entity
if (opt == EntityWriteOption.Modify && existingBayOwner != null)
{
existingBayOwner.OwnerId = owner.OwnerId;
existingBayOwner.BayId = bay.BayId;
await _context.SaveChangesAsync();
return(existingBayOwner);
}
return(null);
}
