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using FluentMigrator;
using FluentMigrator.Exceptions;
using FluentMigrator.Runner.Processors;
namespace Nop.Data.Migrations;
///
/// An implementation that selects one generator by data settings
///
public class NopProcessorAccessor : IProcessorAccessor
{
#region Ctor
public NopProcessorAccessor(IEnumerable processors)
{
ConfigureProcessor(processors.ToList());
}
#endregion
#region Utilities
///
/// Configure processor
///
/// Collection of migration processors
protected virtual void ConfigureProcessor(IList processors)
{
var dataSettings = DataSettingsManager.LoadSettings();
if (!processors.Any())
throw new ProcessorFactoryNotFoundException("No migration processor registered.");
if (dataSettings is null)
Processor = processors.FirstOrDefault();
else
Processor = dataSettings.DataProvider switch
{
DataProviderType.SqlServer => FindGenerator(processors, "SqlServer"),
DataProviderType.MySql => FindGenerator(processors, "MySQL"),
DataProviderType.PostgreSQL => FindGenerator(processors, "Postgres"),
_ => throw new ProcessorFactoryNotFoundException(
$@"A migration generator for Data provider type {dataSettings.DataProvider} couldn't be found.")
};
}
///
/// Gets single processor by DatabaseType or DatabaseTypeAlias
///
/// Collection of migration processors
/// DatabaseType or DatabaseTypeAlias
///
protected IMigrationProcessor FindGenerator(IList processors,
string processorsId)
{
if (processors.FirstOrDefault(p =>
p.DatabaseType.Equals(processorsId, StringComparison.OrdinalIgnoreCase) ||
p.DatabaseTypeAliases.Any(a => a.Equals(processorsId, StringComparison.OrdinalIgnoreCase))) is
IMigrationProcessor processor)
return processor;
var generatorNames = string.Join(", ",
processors.Select(p => p.DatabaseType).Union(processors.SelectMany(p => p.DatabaseTypeAliases)));
throw new ProcessorFactoryNotFoundException(
$@"A migration generator with the ID {processorsId} couldn't be found. Available generators are: {generatorNames}");
}
#endregion
#region Properties
public IMigrationProcessor Processor { get; protected set; }
#endregion
}