Method buildRouterHelpers

http/jsonapi/generator/generate_handler.go:392–442

(routes []*route, schema *openapi3.T)

}

func (g *Generator) buildRouterHelpers(routes []*route, schema *openapi3.T) error {
	needsSecurity := hasSecuritySchema(schema)

	// sort the routes with query parameter to the top
	sortableRoutes := sortableRouteList(routes)
	sort.Stable(&sortableRoutes)

	fallbackName := "fallback"
	fallback := jen.Id(fallbackName).Qual("net/http", "Handler")
	// add all route handlers
	for i := 0; i < len(sortableRoutes); i++ {
		route := sortableRoutes[i]
		var routeCallParams *jen.Statement
		if needsSecurity {
			routeCallParams = jen.List(jen.Id("service"), jen.Id("authBackend"))
		} else {
			routeCallParams = jen.List(jen.Id("service"))
		}
		primaryHandler := jen.Id(route.handler).Call(routeCallParams)
		fallbackHandler := jen.Id(fallbackName)
		ifElse := make([]jen.Code, 0)
		for _, handler := range []jen.Code{primaryHandler, fallbackHandler} {
			block := jen.Return(handler)
			ifElse = append(ifElse, block)
		}

		if len(ifElse) < 1 {
			panic("if-else slice should contain two elements, one with the service interface being called and one passing the NotFoundHandler")
		}

		implGuard := jen.If(
			jen.List(jen.Id("service"), jen.Id("ok")).Op(":=").Id("service").Assert(jen.Id(generateSubServiceName(route.handler))),
			jen.Id("ok")).Block(ifElse[0]).Else().Block(ifElse[1])

		comment := jen.Commentf("%s helper that checks if the given service fulfills the interface. Returns fallback handler if not, otherwise returns matching handler.", generateHandlerTypeAssertionHelperName(route.handler))

		var callParams *jen.Statement
		if needsSecurity {
			callParams = jen.List(jen.Id("service").Id("interface{}"), fallback, jen.Id("authBackend").Id(authBackendInterface))
		} else {
			callParams = jen.List(jen.Id("service").Id("interface{}"), fallback)
		}
		helper := jen.Func().Id(generateHandlerTypeAssertionHelperName(route.handler)).
			Params(callParams).Qual("net/http", "Handler").Block(implGuard).Line().Line()

		g.goSource.Line().Add(comment)
		g.goSource.Add(helper)
	}

	return nil
}

func (g *Generator) buildRouterBodyWithFallback(routes []*route, schema *openapi3.T, fallback jen.Code) ([]jen.Code, error) {
	needsSecurity := hasSecuritySchema(schema)