public async Task ImportForeignLineReactorOwners(WRLDCWarehouseDbContext _context, ILogger _log, string oracleConnStr, EntityWriteOption opt)
{
LineReactorOwnerExtract lrOwnerExtract = new LineReactorOwnerExtract();
List <LineReactorOwnerForeign> lrOwnersForeign = lrOwnerExtract.ExtractLineReactorOwnersForeign(oracleConnStr);
LoadLineReactorOwner loadLrOwner = new LoadLineReactorOwner();
foreach (LineReactorOwnerForeign lrOwnerForeign in lrOwnersForeign)
{
LineReactorOwner insertedLrOwner = await loadLrOwner.LoadSingleAsync(_context, _log, lrOwnerForeign, opt);
}
}
public async Task <LineReactorOwner> LoadSingleAsync(WRLDCWarehouseDbContext _context, ILogger _log, LineReactorOwnerForeign lrOwnerForeign, EntityWriteOption opt)
{
// check if entity already exists
LineReactorOwner existingLrOwner = await _context.LineReactorOwners.SingleOrDefaultAsync(lrO => lrO.WebUatId == lrOwnerForeign.WebUatId);
// check if we should not modify existing entities
if (opt == EntityWriteOption.DontReplace && existingLrOwner != null)
{
return(existingLrOwner);
}
// find the BusReactor via the BusReactorWebUatId
int lrWebUatId = lrOwnerForeign.LineReactorWebUatId;
LineReactor lineReactor = await _context.LineReactors.SingleOrDefaultAsync(lr => lr.WebUatId == lrWebUatId);
// if LineReactor doesnot exist, skip the import. Ideally, there should not be such case
if (lineReactor == null)
{
_log.LogCritical($"Unable to find LineReactor with webUatId {lrWebUatId} while inserting LineReactorOwner with webUatId {lrOwnerForeign.WebUatId}");
return(null);
}
// find the Owner of the substation via the Owner WebUatId
int ownerWebUatId = lrOwnerForeign.OwnerWebUatId;
Owner owner = await _context.Owners.SingleOrDefaultAsync(o => o.WebUatId == ownerWebUatId);
// if owner doesnot exist, skip the import. Ideally, there should not be such case
if (owner == null)
{
_log.LogCritical($"Unable to find Owner with webUatId {ownerWebUatId} while inserting LineReactorOwner with webUatId {lrOwnerForeign.WebUatId}");
return(null);
}
// check if we have to replace the entity completely
if (opt == EntityWriteOption.Replace && existingLrOwner != null)
{
_context.LineReactorOwners.Remove(existingLrOwner);
}
// if entity is not present, then insert or check if we have to replace the entity completely
if (existingLrOwner == null || (opt == EntityWriteOption.Replace && existingLrOwner != null))
{
LineReactorOwner newLrOwner = new LineReactorOwner();
newLrOwner.OwnerId = owner.OwnerId;
newLrOwner.LineReactorId = lineReactor.LineReactorId;
newLrOwner.WebUatId = lrOwnerForeign.WebUatId;
_context.LineReactorOwners.Add(newLrOwner);
await _context.SaveChangesAsync();
return(newLrOwner);
}
// check if we have to modify the entity
if (opt == EntityWriteOption.Modify && existingLrOwner != null)
{
existingLrOwner.OwnerId = owner.OwnerId;
existingLrOwner.LineReactorId = lineReactor.LineReactorId;
await _context.SaveChangesAsync();
return(existingLrOwner);
}
return(null);
}
