HttpRouter.h

// Copyright (c) Stefano Cristiano
// SPDX-License-Identifier: MIT
#pragma once
#include "../Common/Result.h"
#include "../Common/Span.h"
#include "../Common/StringSpan.h"
#include "HttpExport.h"
#include "HttpParser.h"
 
namespace SC
{
 
struct SC_HTTP_EXPORT HttpRouteParam
{
    StringSpan name;
    StringSpan value;
};
 
struct SC_HTTP_EXPORT HttpRoute
{
    HttpParser::Method method      = HttpParser::Method::HttpGET;
    StringSpan         pathPattern = {};
};
 
enum class HttpRouteMatchStatus
{
    Matched,
    MethodNotAllowed,
    NotFound,
    TooManyParams,
};
 
struct SC_HTTP_EXPORT HttpRouteMatch
{
    HttpRouteMatchStatus status    = HttpRouteMatchStatus::NotFound;
    const HttpRoute*     route     = nullptr;
    size_t               numParams = 0;
};
 
struct SC_HTTP_EXPORT HttpRouter
{
    Result init(Span<const HttpRoute> routeStorage);
 
    Result match(HttpParser::Method method, StringSpan requestTarget, Span<HttpRouteParam> params,
                 HttpRouteMatch& match) const;
 
    Result formatAllowHeader(StringSpan requestTarget, Span<char> storage, StringSpan& allow) const;
 
  private:
    Span<const HttpRoute> routes;
};
 
} // namespace SC