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namespace NpgsqlRest;

public interface IEndpointCreateHandler

{

/// <summary>

/// Before creating endpoints.

/// </summary>

/// <param name="builder">current application builder</param>

/// <param name="logger">configured application logger</param>

/// <param name="options">current NpgsqlRest options</param>

void Setup(IApplicationBuilder builder, ILogger? logger, NpgsqlRestOptions options) { }

/// <summary>

/// After successful endpoint creation.

/// </summary>

void Handle(Routine routine, RoutineEndpoint endpoint) { }

/// <summary>

/// After all endpoints are created.

/// </summary>

void Cleanup(ref (Routine routine, RoutineEndpoint endpoint)[] endpoints) { }

/// <summary>

/// After all endpoints are created.

/// </summary>

void Cleanup() { }

}

public interface IRoutineSourceParameterFormatter

{

/// <summary>

/// Return true to call FormatCommand

/// Return false to call AppendCommandParameter or AppendEmpty (when no parameters are present).

/// </summary>

bool IsFormattable { get; }

/// <summary>

/// Return true to call format methods with HttpContext reference.

/// Return false to call format methods without HttpContext reference.

/// </summary>

bool RefContext { get => false; }

/// <summary>

/// Appends result to the command expression string.

/// </summary>

/// <param name="parameter">NpgsqlRestParameter extended parameter with actual name and type descriptor</param>

/// <param name="index">index of the current parameter</param>

/// <param name="count">total parameter count</param>

/// <returns>string to append to expression or null to skip (404 if endpoint is not handled in the next handler)</returns>

string? AppendCommandParameter(ref NpgsqlRestParameter parameter, ref int index, ref int count) => null;

/// <summary>

/// Formats the command expression string.

/// </summary>

/// <param name="routine">Current routine data</param>

/// <param name="parameters">Extended parameters list.</param>

/// <returns>expression string or null to skip (404 if endpoint is not handled in the next handler)</returns>

string? FormatCommand(ref Routine routine, ref List<NpgsqlRestParameter> parameters) => null;

/// <summary>

/// Called when there are no parameters to append.

/// </summary>

/// <returns>string to append to expression or null to skip (404 if endpoint is not handled in the next handler)</returns>

string? AppendEmpty() => null;

/// <summary>

/// Appends result to the command expression string.

/// </summary>

/// <param name="parameter">NpgsqlRestParameter extended parameter with actual name and type descriptor</param>

/// <param name="index">index of the current parameter</param>

/// <param name="count">total parameter count</param>

/// <param name="context">HTTP context reference</param>

/// <returns>string to append to expression or null to skip (404 if endpoint is not handled in the next handler)</returns>

string? AppendCommandParameter(ref NpgsqlRestParameter parameter, ref int index, ref int count, ref HttpContext context) => null;

/// <summary>

/// Formats the command expression string.

/// </summary>

/// <param name="routine">Current routine data</param>

/// <param name="parameters">Extended parameters list.</param>

/// <param name="context">HTTP context reference</param>

/// <returns>expression string or null to skip (404 if endpoint is not handled in the next handler)</returns>

string? FormatCommand(ref Routine routine, ref List<NpgsqlRestParameter> parameters, ref HttpContext context) => null;

/// <summary>

/// Called when there are no parameters to append.

/// </summary>

/// <param name="context">HTTP context reference</param>

/// <returns>string to append to expression or null to skip (404 if endpoint is not handled in the next handler)</returns>

string? AppendEmpty(ref HttpContext context) => null;

}

public interface IRoutineSource

{

/// <summary>

/// Comments mode for the current routine source.

/// </summary>

CommentsMode? CommentsMode { get => null; }

/// <summary>

/// Yield all routines with the formatters from the current source.

/// </summary>

/// <param name="options">Current options</param>

/// <returns></returns>

IEnumerable<(Routine, IRoutineSourceParameterFormatter)> Read(NpgsqlRestOptions options);

}

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