/// <summary>
/// Creates an instance of context, prepared for a signle entity segmentation.
/// </summary>
/// <param name="template">An instance of <see cref="DCTemplate"/>. Reference for groups and blocks.</param>
/// <param name="userConnection">Current instance of <see cref="UserConnection"/>.</param>
/// <param name="entityId">Identifier of a sigle entity, that have to be segmented.</param>
public DCSegmentationContext(DCTemplateModel template, UserConnection userConnection, Guid entityId)
{
Template = template;
UserConnection = userConnection;
SourceEntityId = entityId;
SourceAudience = null;
}
private IEnumerable <DCReplicaModel> GetReplicasByMasks(DCTemplateModel template,
IEnumerable <int> replicaMasks = null)
{
var replicas = template.Replicas;
if (replicaMasks?.Any() == true)
{
replicas = replicas.Where(x => replicaMasks.Contains(x.Mask));
}
return(replicas);
}
/// <summary>
/// Creates an instance of context, prepared for an audience segmentation.
/// </summary>
/// <param name="template">An instance of <see cref="DCTemplate"/>. Reference for groups and blocks.</param>
/// <param name="sourceAudience">Query with a list of identifiers, that have to be segmented.</param>
/// <param name="sourceAlias">An alias of a source table/view.</param>
/// <param name="sourceColumn">The name of an ID source column.</param>
/// <param name="sourceColumnForFilter">The name of a source column to apply filter by.</param>
/// <param name="targetTable">The name of a target table to store a result of segmentation.</param>
/// <param name="entityIdTargetColumn">The name of a target column for entity ID.</param>
/// <param name="replicaIdTargetColumn">The name of a target column for replica ID.</param>
/// <param name="recordIdTargetColumn">The name of a target column for the related record ID.</param>
public DCSegmentationContext(DCTemplateModel template, Select sourceAudience, string sourceAlias,
string sourceColumn, string sourceColumnForFilter, string targetTable, string entityIdTargetColumn,
string replicaIdTargetColumn, string recordIdTargetColumn)
{
Template = template;
SourceAudience = sourceAudience;
SourceAlias = sourceAlias;
UserConnection = sourceAudience.UserConnection;
EntityIdSourceColumn = sourceColumn;
SourceColumnForFilter = sourceColumnForFilter;
TargetTable = targetTable;
EntityIdTargetColumn = entityIdTargetColumn;
ReplicaIdTargetColumn = replicaIdTargetColumn;
RecordIdTargetColumn = recordIdTargetColumn;
}
private void ValidateSqlFilters(DCTemplateModel template, UserConnection userConnection)
{
var selects = GetFilters(template, userConnection);
if (!selects.Any())
{
return;
}
if (selects.Select(x => x.SourceExpression.Alias).Distinct().Count() > 1)
{
var message = new LocalizableString(userConnection.Workspace.ResourceStorage,
"DCResolverTemplateValidator", "LocalizableStrings.HasDifferentAliasesExceptionText.Value").Value;
throw new InvalidQueryStructureException(message);
}
}
/// <summary>
/// Validates <paramref name="template"/> for dynamic content processing.
/// </summary>
/// <param name="template">Template for validate.</param>
/// <param name="userConnection">An instance of the <see cref="Core.UserConnection"/>.</param>
/// <exception cref="InvalidQueryStructureException">Throws when at least two selects
/// have different source alias.</exception>
public void Validate(DCTemplateModel template, UserConnection userConnection)
{
ValidateSqlFilters(template, userConnection);
}
private List <Select> GetFilters(DCTemplateModel template, UserConnection userConnection) => template?.Attributes?.Where(x => x.IsFilter()) .Select(x => x.ToFilter(userConnection)).ToList();
