private static string GetHttpMethodAttribute(HttpMethodInfo httpMethodInfo)
{
if (httpMethodInfo.Method == HttpMethod.Delete || httpMethodInfo.Method == HttpMethod.Get ||
httpMethodInfo.Method == HttpMethod.Head || httpMethodInfo.Method == HttpMethod.Options ||
httpMethodInfo.Method == new HttpMethod("PATCH") ||
httpMethodInfo.Method == HttpMethod.Post || httpMethodInfo.Method == HttpMethod.Put)
{
return("Http" + CodeGenUtility.Capitalize(httpMethodInfo.Method.ToString().ToLowerInvariant()));
}
else
{
return($"AcceptVerbs(\"{httpMethodInfo.Method}\")");
}
}
/// <summary>
/// Generates the ASP.NET controller.
/// </summary>
public override CodeGenOutput GenerateOutput(ServiceInfo serviceInfo)
{
string serviceName = serviceInfo.Name;
string apiNamespaceName = ApiNamespaceName ?? CSharpUtility.GetNamespaceName(serviceInfo);
string namespaceName = NamespaceName ?? $"{apiNamespaceName}.Controllers";
string controllerName = $"{CodeGenUtility.Capitalize(serviceName)}Controller";
var httpServiceInfo = HttpServiceInfo.Create(serviceInfo);
return(new CodeGenOutput(CreateFile($"{controllerName}{CSharpUtility.FileExtension}", code =>
{
CSharpUtility.WriteFileHeader(code, GeneratorName);
List <string> usings = new List <string>
{
"System",
"System.Net.Http",
"System.Threading",
"System.Threading.Tasks",
"Facility.Core",
TargetFramework == AspNetFramework.WebApi ? "System.Web.Http" : "Microsoft.AspNetCore.Mvc",
apiNamespaceName
};
CSharpUtility.WriteUsings(code, usings, namespaceName);
code.WriteLine("#pragma warning disable 1591 // missing XML comment");
code.WriteLine();
code.WriteLine($"namespace {namespaceName}");
using (code.Block())
{
CSharpUtility.WriteCodeGenAttribute(code, GeneratorName);
code.WriteLine($"public partial class {controllerName}");
using (code.Block())
{
foreach (var httpMethodInfo in httpServiceInfo.Methods)
{
var methodInfo = httpMethodInfo.ServiceMethod;
string methodName = CodeGenUtility.Capitalize(methodInfo.Name);
code.WriteLineSkipOnce();
CSharpUtility.WriteObsoleteAttribute(code, methodInfo);
code.WriteLine($"[{GetHttpMethodAttribute(httpMethodInfo)}, Route(\"{httpMethodInfo.Path.Substring(1)}\")]");
code.WriteLine($"public Task<HttpResponseMessage> {methodName}(HttpRequestMessage httpRequest, CancellationToken cancellationToken = default(CancellationToken))");
using (code.Block())
code.WriteLine($"return GetServiceHttpHandler().TryHandle{methodName}Async(httpRequest, cancellationToken);");
}
}
}
})));
}
private void WriteDto(CodeWriter code, ServiceDtoInfo dtoInfo, ServiceInfo service)
{
code.WriteLine();
WriteJsDoc(code, dtoInfo);
using (code.Block($"export interface I{CodeGenUtility.Capitalize(dtoInfo.Name)} {{", "}"))
{
foreach (var fieldInfo in dtoInfo.Fields)
{
code.WriteLineSkipOnce();
WriteJsDoc(code, fieldInfo);
code.WriteLine($"{fieldInfo.Name}?: {RenderFieldType(service.GetFieldType(fieldInfo))};");
}
}
}
private string RenderFieldType(ServiceTypeInfo fieldType)
{
switch (fieldType.Kind)
{
case ServiceTypeKind.String:
case ServiceTypeKind.Bytes:
case ServiceTypeKind.Enum:
return("string");
case ServiceTypeKind.Boolean:
return("boolean");
case ServiceTypeKind.Double:
case ServiceTypeKind.Int32:
case ServiceTypeKind.Int64:
case ServiceTypeKind.Decimal:
return("number");
case ServiceTypeKind.Object:
return("{ [name: string]: any }");
case ServiceTypeKind.Error:
return("IServiceError");
case ServiceTypeKind.Dto:
return($"I{CodeGenUtility.Capitalize(fieldType.Dto.Name)}");
case ServiceTypeKind.Result:
return($"IServiceResult<{RenderFieldType(fieldType.ValueType)}>");
case ServiceTypeKind.Array:
return($"{RenderFieldType(fieldType.ValueType)}[]");
case ServiceTypeKind.Map:
return($"{{ [name: string]: {RenderFieldType(fieldType.ValueType)} }}");
default:
throw new NotSupportedException("Unknown field type " + fieldType.Kind);
}
}
public static string GetDtoName(ServiceDtoInfo dtoInfo) => CodeGenUtility.Capitalize(dtoInfo.Name) + "Dto";
public static string GetMethodName(ServiceMethodInfo methodInfo) => CodeGenUtility.Capitalize(methodInfo.Name);
public static string GetInterfaceName(ServiceInfo serviceInfo) => $"I{CodeGenUtility.Capitalize(serviceInfo.Name)}";
public void CapitalizeNumber()
{
CodeGenUtility.Capitalize("1234").ShouldBe("1234");
}
public static string GetEnumValueName(ServiceEnumValueInfo enumValue) => CodeGenUtility.Capitalize(enumValue.Name);
public static string GetNamespaceName(ServiceInfo serviceInfo)
{
return(serviceInfo.TryGetAttribute("javascript")?.TryGetParameterValue("namespace") ?? CodeGenUtility.Capitalize(serviceInfo.Name));
}
public static string GetRequestDtoName(ServiceMethodInfo methodInfo)
{
return(CodeGenUtility.Capitalize(methodInfo.Name) + "RequestDto");
}
/// <summary> /// Gets the property name for the specified field. /// </summary> public string GetFieldPropertyName(ServiceFieldInfo field) => m_fieldPropertyNames.TryGetValue(field, out var value) ? value : CodeGenUtility.Capitalize(field.Name);
public static string GetErrorSetName(ServiceErrorSetInfo errorSetInfo)
{
return(CodeGenUtility.Capitalize(errorSetInfo.Name));
}
/// <summary>
/// Generates the C# output.
/// </summary>
protected override CodeGenOutput GenerateOutputCore(ServiceInfo service)
{
var httpServiceInfo = new HttpServiceInfo(service);
string moduleName = ModuleName ?? service.Name;
string capModuleName = CodeGenUtility.Capitalize(moduleName);
return(new CodeGenOutput(CreateNamedText(Uncapitalize(moduleName) + (TypeScript ? ".ts" : ".js"), code =>
{
code.WriteLine($"// DO NOT EDIT: generated by {GeneratorName}");
if (!TypeScript)
{
code.WriteLine("'use strict';");
}
code.WriteLine();
code.WriteLine("import { HttpClientUtility" + IfTypeScript(", IServiceResult, IServiceError, IHttpClientOptions") + " } from 'facility-core';");
code.WriteLine();
WriteJSDoc(code, $"Provides access to {capModuleName} over HTTP via fetch.");
using (code.Block("export function createHttpClient({ fetch, baseUri }" + IfTypeScript(": IHttpClientOptions") + ")" + IfTypeScript($": I{capModuleName}") + " {", "}"))
code.WriteLine($"return new {capModuleName}HttpClient(fetch, baseUri);");
if (TypeScript)
{
code.WriteLine();
WriteJSDoc(code, service);
using (code.Block($"export interface I{capModuleName} {{", "}"))
{
foreach (var httpMethodInfo in httpServiceInfo.Methods)
{
string methodName = httpMethodInfo.ServiceMethod.Name;
string capMethodName = CodeGenUtility.Capitalize(methodName);
code.WriteLineSkipOnce();
WriteJSDoc(code, httpMethodInfo.ServiceMethod);
code.WriteLine($"{methodName}(request: I{capMethodName}Request): Promise<IServiceResult<I{capMethodName}Response>>;");
}
}
foreach (var methodInfo in service.Methods)
{
WriteDto(code, new ServiceDtoInfo(
name: $"{CodeGenUtility.Capitalize(methodInfo.Name)}Request",
fields: methodInfo.RequestFields,
summary: $"Request for {CodeGenUtility.Capitalize(methodInfo.Name)}.",
position: methodInfo.Position), service);
WriteDto(code, new ServiceDtoInfo(
name: $"{CodeGenUtility.Capitalize(methodInfo.Name)}Response",
fields: methodInfo.ResponseFields,
summary: $"Response for {CodeGenUtility.Capitalize(methodInfo.Name)}.",
position: methodInfo.Position), service);
}
foreach (var dtoInfo in service.Dtos)
{
WriteDto(code, dtoInfo, service);
}
}
code.WriteLine();
code.WriteLine("const { fetchResponse, createResponseError, createRequiredRequestFieldError } = HttpClientUtility;");
if (TypeScript)
{
code.WriteLine("type IFetch = HttpClientUtility.IFetch;");
code.WriteLine("type IFetchRequest = HttpClientUtility.IFetchRequest;");
}
code.WriteLine();
using (code.Block($"class {capModuleName}HttpClient" + IfTypeScript($" implements I{capModuleName}") + " {", "}"))
{
using (code.Block("constructor(fetch" + IfTypeScript(": IFetch") + ", baseUri" + IfTypeScript(": string") + ") {", "}"))
{
using (code.Block("if (typeof fetch !== 'function') {", "}"))
code.WriteLine("throw new TypeError('fetch must be a function.');");
using (code.Block("if (typeof baseUri === 'undefined') {", "}"))
code.WriteLine($"baseUri = '{httpServiceInfo.Url ?? ""}';");
using (code.Block(@"if (/[^\/]$/.test(baseUri)) {", "}"))
code.WriteLine("baseUri += '/';");
code.WriteLine("this._fetch = fetch;");
code.WriteLine("this._baseUri = baseUri;");
}
foreach (var httpMethodInfo in httpServiceInfo.Methods)
{
string methodName = httpMethodInfo.ServiceMethod.Name;
string capMethodName = CodeGenUtility.Capitalize(methodName);
code.WriteLine();
WriteJSDoc(code, httpMethodInfo.ServiceMethod);
using (code.Block(IfTypeScript("public ") + $"{methodName}(request" + IfTypeScript($": I{capMethodName}Request") + ")" + IfTypeScript($": Promise<IServiceResult<I{capMethodName}Response>>") + " {", "}"))
{
bool hasPathFields = httpMethodInfo.PathFields.Count != 0;
string jsUriDelim = hasPathFields ? "`" : "'";
string jsUri = jsUriDelim + httpMethodInfo.Path.Substring(1) + jsUriDelim;
if (hasPathFields)
{
foreach (var httpPathField in httpMethodInfo.PathFields)
{
code.WriteLine($"const uriPart{CodeGenUtility.Capitalize(httpPathField.ServiceField.Name)} = request.{httpPathField.ServiceField.Name} != null && {RenderUriComponent(httpPathField.ServiceField, service)};");
using (code.Block($"if (!uriPart{CodeGenUtility.Capitalize(httpPathField.ServiceField.Name)}) {{", "}"))
code.WriteLine($"return Promise.resolve(createRequiredRequestFieldError('{httpPathField.ServiceField.Name}'));");
}
foreach (var httpPathField in httpMethodInfo.PathFields)
{
jsUri = jsUri.Replace("{" + httpPathField.Name + "}", $"${{uriPart{CodeGenUtility.Capitalize(httpPathField.ServiceField.Name)}}}");
}
}
bool hasQueryFields = httpMethodInfo.QueryFields.Count != 0;
code.WriteLine((hasQueryFields ? "let" : "const") + $" uri = {jsUri};");
if (hasQueryFields)
{
code.WriteLine("const query" + IfTypeScript(": string[]") + " = [];");
foreach (var httpQueryField in httpMethodInfo.QueryFields)
{
code.WriteLine($"request.{httpQueryField.ServiceField.Name} == null || query.push('{httpQueryField.Name}=' + {RenderUriComponent(httpQueryField.ServiceField, service)});");
}
using (code.Block("if (query.length) {", "}"))
code.WriteLine("uri = uri + '?' + query.join('&');");
}
using (code.Block("const fetchRequest" + IfTypeScript(": IFetchRequest") + " = {", "};"))
{
if (httpMethodInfo.RequestBodyField == null && httpMethodInfo.RequestNormalFields.Count == 0)
{
code.WriteLine($"method: '{httpMethodInfo.Method}'");
}
else
{
code.WriteLine($"method: '{httpMethodInfo.Method}',");
code.WriteLine("headers: { 'Content-Type': 'application/json' },");
if (httpMethodInfo.RequestBodyField != null)
{
code.WriteLine($"body: JSON.stringify(request.{httpMethodInfo.RequestBodyField.ServiceField.Name})");
}
else if (httpMethodInfo.ServiceMethod.RequestFields.Count == httpMethodInfo.RequestNormalFields.Count)
{
code.WriteLine("body: JSON.stringify(request)");
}
else
{
using (code.Block("body: JSON.stringify({", "})"))
{
for (int httpFieldIndex = 0; httpFieldIndex < httpMethodInfo.RequestNormalFields.Count; httpFieldIndex++)
{
var httpFieldInfo = httpMethodInfo.RequestNormalFields[httpFieldIndex];
bool isLastField = httpFieldIndex == httpMethodInfo.RequestNormalFields.Count - 1;
string fieldName = httpFieldInfo.ServiceField.Name;
code.WriteLine(fieldName + ": request." + fieldName + (isLastField ? "" : ","));
}
}
}
}
}
if (httpMethodInfo.RequestHeaderFields.Count != 0)
{
foreach (var httpHeaderField in httpMethodInfo.RequestHeaderFields)
{
using (code.Block($"if (request.{httpHeaderField.ServiceField.Name} != null) {{", "}"))
code.WriteLine($"fetchRequest.headers['{httpHeaderField.Name}'] = request.{httpHeaderField.ServiceField.Name};");
}
}
code.WriteLine("return fetchResponse(this._fetch, this._baseUri + uri, fetchRequest)");
using (code.Indent())
using (code.Block(".then(result => {", "});"))
{
code.WriteLine("const status = result.response.status;");
code.WriteLine("let value" + IfTypeScript($": I{capMethodName}Response") + " = null;");
using (code.Block($"if (result.json) {{", "}"))
{
var validResponses = httpMethodInfo.ValidResponses;
string elsePrefix = "";
foreach (var validResponse in validResponses)
{
string statusCodeAsString = ((int)validResponse.StatusCode).ToString(CultureInfo.InvariantCulture);
code.WriteLine($"{elsePrefix}if (status === {statusCodeAsString}) {{");
elsePrefix = "else ";
using (code.Indent())
{
var bodyField = validResponse.BodyField;
if (bodyField != null)
{
string responseBodyFieldName = bodyField.ServiceField.Name;
var bodyFieldType = service.GetFieldType(bodyField.ServiceField);
if (bodyFieldType.Kind == ServiceTypeKind.Boolean)
{
code.WriteLine($"value = {{ {responseBodyFieldName}: true }};");
}
else
{
code.WriteLine($"value = {{ {responseBodyFieldName}: result.json }};");
}
}
else
{
if (validResponse.NormalFields.Count == 0)
{
code.WriteLine("value = {};");
}
else
{
code.WriteLine("value = result.json;");
}
}
}
code.WriteLine("}");
}
}
using (code.Block("if (!value) {", "}"))
code.WriteLine("return createResponseError(status, result.json)" + IfTypeScript($" as IServiceResult<I{capMethodName}Response>") + ";");
if (httpMethodInfo.ResponseHeaderFields.Count != 0)
{
code.WriteLine("let headerValue" + IfTypeScript(": string") + ";");
foreach (var httpHeaderField in httpMethodInfo.ResponseHeaderFields)
{
code.WriteLine($"headerValue = result.response.headers.get('{httpHeaderField.Name}');");
using (code.Block("if (headerValue != null) {", "}"))
code.WriteLine($"value.{httpHeaderField.Name} = headerValue;");
}
}
code.WriteLine("return { value: value };");
}
}
}
if (TypeScript)
{
code.WriteLine();
code.WriteLine("private _fetch: IFetch;");
code.WriteLine("private _baseUri: string;");
}
}
})));
}
public static string GetFieldPropertyName(ServiceFieldInfo fieldInfo)
{
return(TryGetJavaScriptName(fieldInfo) ?? CodeGenUtility.Capitalize(fieldInfo.Name));
}
public static string GetResponseDtoName(ServiceMethodInfo methodInfo) => CodeGenUtility.Capitalize(methodInfo.Name) + "ResponseDto";
private static string GetHttpMethodAttribute(HttpMethodInfo httpMethodInfo)
{
return("Http" + CodeGenUtility.Capitalize(httpMethodInfo.Method.ToLowerInvariant()));
}
public static string GetEnumName(ServiceEnumInfo enumInfo) => CodeGenUtility.Capitalize(enumInfo.Name);
public void CapitalizeLowerCase()
{
CodeGenUtility.Capitalize("xyzzy").ShouldBe("Xyzzy");
}
public static string GetErrorName(ServiceErrorInfo errorInfo) => CodeGenUtility.Capitalize(errorInfo.Name);
public void Capitalize(string before, string after)
{
CodeGenUtility.Capitalize(before).Should().Be(after);
}
/// <summary>
/// Generates the C# output.
/// </summary>
protected override CodeGenOutput GenerateOutputCore(ServiceInfo service)
{
var httpServiceInfo = HttpServiceInfo.Create(service);
string moduleName = ModuleName ?? service.Name;
string capModuleName = CodeGenUtility.Capitalize(moduleName);
string typesFileName = Uncapitalize(moduleName) + "Types" + (TypeScript ? ".ts" : ".js");
string clientFileName = Uncapitalize(moduleName) + (TypeScript ? ".ts" : ".js");
string serverFileName = Uncapitalize(moduleName) + "Server" + (TypeScript ? ".ts" : ".js");
var namedTexts = new List <CodeGenFile>();
var typeNames = new List <string>();
if (TypeScript)
{
namedTexts.Add(CreateFile(typesFileName, code =>
{
code.WriteLine($"// DO NOT EDIT: generated by {GeneratorName}");
code.WriteLine();
code.WriteLine("import { IServiceResult, IServiceError } from 'facility-core';");
code.WriteLine();
WriteJsDoc(code, service);
typeNames.Add($"I{capModuleName}");
using (code.Block($"export interface I{capModuleName} {{", "}"))
{
foreach (var httpMethodInfo in httpServiceInfo.Methods)
{
string methodName = httpMethodInfo.ServiceMethod.Name;
string capMethodName = CodeGenUtility.Capitalize(methodName);
code.WriteLineSkipOnce();
WriteJsDoc(code, httpMethodInfo.ServiceMethod);
code.WriteLine($"{methodName}(request: I{capMethodName}Request): Promise<IServiceResult<I{capMethodName}Response>>;");
}
}
foreach (var methodInfo in service.Methods)
{
var requestDtoName = $"{CodeGenUtility.Capitalize(methodInfo.Name)}Request";
typeNames.Add($"I{requestDtoName}");
WriteDto(code, new ServiceDtoInfo(
name: requestDtoName,
fields: methodInfo.RequestFields,
summary: $"Request for {CodeGenUtility.Capitalize(methodInfo.Name)}."), service);
var responseDtoName = $"{CodeGenUtility.Capitalize(methodInfo.Name)}Response";
typeNames.Add($"I{responseDtoName}");
WriteDto(code, new ServiceDtoInfo(
name: responseDtoName,
fields: methodInfo.ResponseFields,
summary: $"Response for {CodeGenUtility.Capitalize(methodInfo.Name)}."), service);
}
foreach (var dtoInfo in service.Dtos)
{
typeNames.Add($"I{dtoInfo.Name}");
WriteDto(code, dtoInfo, service);
}
code.WriteLine();
}));
}
namedTexts.Add(CreateFile(clientFileName, code =>
{
code.WriteLine($"// DO NOT EDIT: generated by {GeneratorName}");
if (!TypeScript)
{
code.WriteLine("'use strict';");
}
code.WriteLine();
code.WriteLine("import { HttpClientUtility" + IfTypeScript(", IServiceResult, IServiceError, IHttpClientOptions") + " } from 'facility-core';");
if (TypeScript)
{
code.WriteLine($"import {{ {string.Join(", ", typeNames)} }} from './{Uncapitalize(moduleName)}Types';");
code.WriteLine($"export * from './{Uncapitalize(moduleName)}Types';");
}
code.WriteLine();
WriteJsDoc(code, $"Provides access to {capModuleName} over HTTP via fetch.");
using (code.Block("export function createHttpClient({ fetch, baseUri }" + IfTypeScript(": IHttpClientOptions") + ")" + IfTypeScript($": I{capModuleName}") + " {", "}"))
code.WriteLine($"return new {capModuleName}HttpClient(fetch, baseUri);");
code.WriteLine();
code.WriteLine("const { fetchResponse, createResponseError, createRequiredRequestFieldError } = HttpClientUtility;");
if (TypeScript)
{
code.WriteLine("type IFetch = HttpClientUtility.IFetch;");
code.WriteLine("type IFetchRequest = HttpClientUtility.IFetchRequest;");
}
code.WriteLine();
using (code.Block($"class {capModuleName}HttpClient" + IfTypeScript($" implements I{capModuleName}") + " {", "}"))
{
using (code.Block("constructor(fetch" + IfTypeScript(": IFetch") + ", baseUri" + IfTypeScript("?: string") + ") {", "}"))
{
using (code.Block("if (typeof fetch !== 'function') {", "}"))
code.WriteLine("throw new TypeError('fetch must be a function.');");
using (code.Block("if (typeof baseUri === 'undefined') {", "}"))
code.WriteLine($"baseUri = '{httpServiceInfo.Url ?? ""}';");
using (code.Block(@"if (/[^\/]$/.test(baseUri)) {", "}"))
code.WriteLine("baseUri += '/';");
code.WriteLine("this._fetch = fetch;");
code.WriteLine("this._baseUri = baseUri;");
}
foreach (var httpMethodInfo in httpServiceInfo.Methods)
{
string methodName = httpMethodInfo.ServiceMethod.Name;
string capMethodName = CodeGenUtility.Capitalize(methodName);
code.WriteLine();
WriteJsDoc(code, httpMethodInfo.ServiceMethod);
using (code.Block(IfTypeScript("public ") + $"{methodName}(request" + IfTypeScript($": I{capMethodName}Request") + ")" + IfTypeScript($": Promise<IServiceResult<I{capMethodName}Response>>") + " {", "}"))
{
bool hasPathFields = httpMethodInfo.PathFields.Count != 0;
string jsUriDelim = hasPathFields ? "`" : "'";
string jsUri = jsUriDelim + httpMethodInfo.Path.Substring(1) + jsUriDelim;
if (hasPathFields)
{
foreach (var httpPathField in httpMethodInfo.PathFields)
{
code.WriteLine($"const uriPart{CodeGenUtility.Capitalize(httpPathField.ServiceField.Name)} = request.{httpPathField.ServiceField.Name} != null && {RenderUriComponent(httpPathField.ServiceField, service)};");
using (code.Block($"if (!uriPart{CodeGenUtility.Capitalize(httpPathField.ServiceField.Name)}) {{", "}"))
code.WriteLine($"return Promise.resolve(createRequiredRequestFieldError('{httpPathField.ServiceField.Name}'));");
}
foreach (var httpPathField in httpMethodInfo.PathFields)
{
jsUri = jsUri.Replace("{" + httpPathField.Name + "}", $"${{uriPart{CodeGenUtility.Capitalize(httpPathField.ServiceField.Name)}}}");
}
}
bool hasQueryFields = httpMethodInfo.QueryFields.Count != 0;
code.WriteLine((hasQueryFields ? "let" : "const") + $" uri = {jsUri};");
if (hasQueryFields)
{
code.WriteLine("const query" + IfTypeScript(": string[]") + " = [];");
foreach (var httpQueryField in httpMethodInfo.QueryFields)
{
code.WriteLine($"request.{httpQueryField.ServiceField.Name} == null || query.push('{httpQueryField.Name}=' + {RenderUriComponent(httpQueryField.ServiceField, service)});");
}
using (code.Block("if (query.length) {", "}"))
code.WriteLine("uri = uri + '?' + query.join('&');");
}
using (code.Block("const fetchRequest" + IfTypeScript(": IFetchRequest") + " = {", "};"))
{
if (httpMethodInfo.RequestBodyField == null && httpMethodInfo.RequestNormalFields.Count == 0)
{
code.WriteLine($"method: '{httpMethodInfo.Method}',");
if (httpMethodInfo.RequestHeaderFields.Count != 0)
{
code.WriteLine("headers: {},");
}
}
else
{
code.WriteLine($"method: '{httpMethodInfo.Method}',");
code.WriteLine("headers: { 'Content-Type': 'application/json' },");
if (httpMethodInfo.RequestBodyField != null)
{
code.WriteLine($"body: JSON.stringify(request.{httpMethodInfo.RequestBodyField.ServiceField.Name})");
}
else if (httpMethodInfo.ServiceMethod.RequestFields.Count == httpMethodInfo.RequestNormalFields.Count)
{
code.WriteLine("body: JSON.stringify(request)");
}
else
{
using (code.Block("body: JSON.stringify({", "})"))
{
for (int httpFieldIndex = 0; httpFieldIndex < httpMethodInfo.RequestNormalFields.Count; httpFieldIndex++)
{
var httpFieldInfo = httpMethodInfo.RequestNormalFields[httpFieldIndex];
bool isLastField = httpFieldIndex == httpMethodInfo.RequestNormalFields.Count - 1;
string fieldName = httpFieldInfo.ServiceField.Name;
code.WriteLine(fieldName + ": request." + fieldName + (isLastField ? "" : ","));
}
}
}
}
}
if (httpMethodInfo.RequestHeaderFields.Count != 0)
{
foreach (var httpHeaderField in httpMethodInfo.RequestHeaderFields)
{
using (code.Block($"if (request.{httpHeaderField.ServiceField.Name} != null) {{", "}"))
code.WriteLine($"fetchRequest.headers['{httpHeaderField.Name}'] = request.{httpHeaderField.ServiceField.Name};");
}
}
code.WriteLine("return fetchResponse(this._fetch, this._baseUri + uri, fetchRequest)");
using (code.Indent())
using (code.Block(".then(result => {", "});"))
{
code.WriteLine("const status = result.response.status;");
code.WriteLine("let value" + IfTypeScript($": I{capMethodName}Response | null") + " = null;");
using (code.Block("if (result.json) {", "}"))
{
var validResponses = httpMethodInfo.ValidResponses;
string elsePrefix = "";
foreach (var validResponse in validResponses)
{
string statusCodeAsString = ((int)validResponse.StatusCode).ToString(CultureInfo.InvariantCulture);
code.WriteLine($"{elsePrefix}if (status === {statusCodeAsString}) {{");
elsePrefix = "else ";
using (code.Indent())
{
var bodyField = validResponse.BodyField;
if (bodyField != null)
{
string responseBodyFieldName = bodyField.ServiceField.Name;
var bodyFieldType = service.GetFieldType(bodyField.ServiceField);
if (bodyFieldType.Kind == ServiceTypeKind.Boolean)
{
code.WriteLine($"value = {{ {responseBodyFieldName}: true }};");
}
else
{
code.WriteLine($"value = {{ {responseBodyFieldName}: result.json }};");
}
}
else
{
if (validResponse.NormalFields.Count == 0)
{
code.WriteLine("value = {};");
}
else
{
code.WriteLine("value = result.json;");
}
}
}
code.WriteLine("}");
}
}
using (code.Block("if (!value) {", "}"))
code.WriteLine("return createResponseError(status, result.json)" + IfTypeScript($" as IServiceResult<I{capMethodName}Response>") + ";");
if (httpMethodInfo.ResponseHeaderFields.Count != 0)
{
code.WriteLine("let headerValue" + IfTypeScript(": string | null | undefined") + ";");
foreach (var httpHeaderField in httpMethodInfo.ResponseHeaderFields)
{
code.WriteLine($"headerValue = result.response.headers.get('{httpHeaderField.Name}');");
using (code.Block("if (headerValue != null) {", "}"))
code.WriteLine($"value.{httpHeaderField.Name} = headerValue;");
}
}
code.WriteLine("return { value: value };");
}
}
}
if (TypeScript)
{
code.WriteLine();
code.WriteLine("private _fetch: IFetch;");
code.WriteLine("private _baseUri: string;");
}
}
}));
if (Express)
{
namedTexts.Add(CreateFile(serverFileName, code =>
{
code.WriteLine($"// DO NOT EDIT: generated by {GeneratorName}");
if (!TypeScript)
{
code.WriteLine("'use strict';");
}
code.WriteLine();
code.WriteLine("import * as bodyParser from 'body-parser';");
code.WriteLine("import * as express from 'express';");
code.WriteLine("import {" + IfTypeScript(" IServiceResult, IServiceError") + " } from 'facility-core';");
if (TypeScript)
{
code.WriteLine($"import {{ {string.Join(", ", typeNames)} }} from './{Uncapitalize(moduleName)}Types';");
code.WriteLine($"export * from './{Uncapitalize(moduleName)}Types';");
}
// TODO: export this from facility-core
code.WriteLine();
using (code.Block("const standardErrorCodes" + IfTypeScript(": { [code: string]: number }") + " = {", "};"))
{
code.WriteLine("'notModified': 304,");
code.WriteLine("'invalidRequest': 400,");
code.WriteLine("'notAuthenticated': 401,");
code.WriteLine("'notAuthorized': 403,");
code.WriteLine("'notFound': 404,");
code.WriteLine("'conflict': 409,");
code.WriteLine("'requestTooLarge': 413,");
code.WriteLine("'tooManyRequests': 429,");
code.WriteLine("'internalError': 500,");
code.WriteLine("'serviceUnavailable': 503,");
}
code.WriteLine();
using (code.Block("function parseBoolean(value" + IfTypeScript(": string | undefined") + ") {", "}"))
{
using (code.Block("if (typeof value === 'string') {", "}"))
{
code.WriteLine("const lowerValue = value.toLowerCase();");
using (code.Block("if (lowerValue === 'true') {", "}"))
code.WriteLine("return true;");
using (code.Block("if (lowerValue === 'false') {", "}"))
code.WriteLine("return false;");
}
code.WriteLine("return undefined;");
}
code.WriteLine();
using (code.Block("export function createApp(service" + IfTypeScript($": I{capModuleName}") + ", middleware" + IfTypeScript(": ((...args: any[]) => void)[]") + ")" + IfTypeScript(": express.Application") + " {", "}"))
{
code.WriteLine("const app = express();");
code.WriteLine("app.use(bodyParser.json());");
code.WriteLine("app.use(bodyParser.urlencoded({ extended: true }));");
code.WriteLine("middleware.forEach(func => app.use(func));");
foreach (var httpMethodInfo in httpServiceInfo.Methods)
{
string methodName = httpMethodInfo.ServiceMethod.Name;
string capMethodName = CodeGenUtility.Capitalize(methodName);
string expressMethod = httpMethodInfo.Method.ToLowerInvariant();
string expressPath = httpMethodInfo.Path;
foreach (var httpPathField in httpMethodInfo.PathFields)
{
expressPath = expressPath.Replace("{" + httpPathField.Name + "}", $":{httpPathField.Name}");
}
code.WriteLine();
WriteJsDoc(code, httpMethodInfo.ServiceMethod);
using (code.Block($"app.{expressMethod}('{expressPath}', function (req, res, next) {{", "});"))
{
code.WriteLine("const request" + IfTypeScript($": I{capMethodName}Request") + " = {};");
foreach (var httpPathField in httpMethodInfo.PathFields)
{
code.WriteLine($"request.{httpPathField.ServiceField.Name} = {RenderJsConversion(httpPathField.ServiceField, service, $"req.params.{httpPathField.Name}")};");
}
foreach (var httpQueryField in httpMethodInfo.QueryFields)
{
using (code.Block($"if (req.query['{httpQueryField.Name}'] != null) {{", "}"))
code.WriteLine($"request.{httpQueryField.ServiceField.Name} = {RenderJsConversion(httpQueryField.ServiceField, service, $"req.query['{httpQueryField.Name}']")};");
}
if (httpMethodInfo.RequestBodyField != null)
{
code.WriteLine($"request.{httpMethodInfo.RequestBodyField.ServiceField.Name} = req.body;");
}
else if (httpMethodInfo.RequestNormalFields != null)
{
foreach (var field in httpMethodInfo.RequestNormalFields)
{
code.WriteLine($"request.{field.ServiceField.Name} = req.body.{field.ServiceField.Name};");
}
}
if (httpMethodInfo.RequestHeaderFields != null)
{
foreach (var field in httpMethodInfo.RequestHeaderFields)
{
code.WriteLine($"request.{field.ServiceField.Name} = req.header('{field.Name}');");
}
}
code.WriteLine();
code.WriteLine($"return service.{methodName}(request)");
using (code.Indent())
{
using (code.Block(".then(result => {", "})"))
{
using (code.Block("if (result.error) {", "}"))
{
code.WriteLine("const status = result.error.code && standardErrorCodes[result.error.code] || 500;");
code.WriteLine("res.status(status).send(result.error);");
code.WriteLine("return;");
}
using (code.Block("if (result.value) {", "}"))
{
if (httpMethodInfo.ResponseHeaderFields != null)
{
foreach (var field in httpMethodInfo.ResponseHeaderFields)
{
using (code.Block($"if (result.value.{field.ServiceField.Name} != null) {{", "}"))
code.WriteLine($"res.setHeader('{field.Name}', result.value.{field.ServiceField.Name});");
}
}
foreach (var validResponse in httpMethodInfo.ValidResponses.Where(x => x.NormalFields == null || x.NormalFields.Count == 0))
{
var bodyField = validResponse.BodyField;
if (bodyField != null)
{
string responseBodyFieldName = bodyField.ServiceField.Name;
using (code.Block($"if (result.value.{responseBodyFieldName}) {{", "}"))
{
var bodyFieldType = service.GetFieldType(bodyField.ServiceField);
if (bodyFieldType.Kind == ServiceTypeKind.Boolean)
{
code.WriteLine($"res.sendStatus({(int) validResponse.StatusCode});");
code.WriteLine("return;");
}
else
{
code.WriteLine($"res.status({(int) validResponse.StatusCode}).send(result.value.{responseBodyFieldName});");
code.WriteLine("return;");
}
}
}
else
{
if (validResponse.NormalFields.Count == 0)
{
code.WriteLine($"res.sendStatus({(int) validResponse.StatusCode});");
code.WriteLine("return;");
}
}
}
foreach (var validResponse in httpMethodInfo.ValidResponses.Where(x => x.NormalFields != null && x.NormalFields.Count != 0))
{
code.WriteLine($"res.status({(int) validResponse.StatusCode}).send({{");
using (code.Indent())
{
foreach (var field in validResponse.NormalFields)
{
code.WriteLine($"{field.ServiceField.Name}: result.value.{field.ServiceField.Name},");
}
}
code.WriteLine("});");
code.WriteLine("return;");
}
}
code.WriteLine("throw new Error('Result must have an error or value.');");
}
code.WriteLine(".catch(next);");
}
}
}
code.WriteLine();
code.WriteLine("return app;");
}
}));
}
return(new CodeGenOutput(namedTexts, new List <CodeGenPattern>()));
}
/// <summary>
/// Generates the JavaScript/TypeScript output.
/// </summary>
public override CodeGenOutput GenerateOutput(ServiceInfo service)
{
var httpServiceInfo = HttpServiceInfo.Create(service);
var moduleName = ModuleName ?? service.Name;
var capModuleName = CodeGenUtility.Capitalize(moduleName);
var typesFileName = Uncapitalize(moduleName) + "Types" + (TypeScript ? ".ts" : ".js");
var clientFileName = Uncapitalize(moduleName) + (TypeScript ? ".ts" : ".js");
var serverFileName = Uncapitalize(moduleName) + "Server" + (TypeScript ? ".ts" : ".js");
var namedTexts = new List <CodeGenFile>();
var typeNames = new List <string>();
if (TypeScript)
{
namedTexts.Add(CreateFile(typesFileName, code =>
{
WriteFileHeader(code);
var allFields = service.Dtos.SelectMany(x => x.Fields).Concat(service.Methods.SelectMany(x => x.RequestFields.Concat(x.ResponseFields))).ToList();
code.WriteLine();
var facilityImports = new List <string>();
if (httpServiceInfo.Methods.Any() || allFields.Any(x => FieldUsesKind(service, x, ServiceTypeKind.Result)))
{
facilityImports.Add("IServiceResult");
}
if (allFields.Any(x => FieldUsesKind(service, x, ServiceTypeKind.Error)))
{
facilityImports.Add("IServiceError");
}
WriteImports(code, facilityImports, "facility-core");
code.WriteLine();
WriteJsDoc(code, service);
typeNames.Add($"I{capModuleName}");
using (code.Block($"export interface I{capModuleName} {{", "}"))
{
foreach (var httpMethodInfo in httpServiceInfo.Methods)
{
var methodName = httpMethodInfo.ServiceMethod.Name;
var capMethodName = CodeGenUtility.Capitalize(methodName);
code.WriteLineSkipOnce();
WriteJsDoc(code, httpMethodInfo.ServiceMethod);
code.WriteLine($"{methodName}(request: I{capMethodName}Request): Promise<IServiceResult<I{capMethodName}Response>>;");
}
}
foreach (var methodInfo in service.Methods)
{
var requestDtoName = $"{CodeGenUtility.Capitalize(methodInfo.Name)}Request";
typeNames.Add($"I{requestDtoName}");
WriteDto(code, new ServiceDtoInfo(
name: requestDtoName,
fields: methodInfo.RequestFields,
summary: $"Request for {CodeGenUtility.Capitalize(methodInfo.Name)}."), service);
var responseDtoName = $"{CodeGenUtility.Capitalize(methodInfo.Name)}Response";
typeNames.Add($"I{responseDtoName}");
WriteDto(code, new ServiceDtoInfo(
name: responseDtoName,
fields: methodInfo.ResponseFields,
summary: $"Response for {CodeGenUtility.Capitalize(methodInfo.Name)}."), service);
}
foreach (var dtoInfo in service.Dtos)
{
typeNames.Add($"I{dtoInfo.Name}");
WriteDto(code, dtoInfo, service);
}
code.WriteLine();
}));
}
namedTexts.Add(CreateFile(clientFileName, code =>
{
WriteFileHeader(code);
if (!TypeScript)
{
code.WriteLine("'use strict';");
}
code.WriteLine();
var facilityImports = new List <string> {
"HttpClientUtility"
};
if (TypeScript)
{
if (httpServiceInfo.Methods.Any())
{
facilityImports.Add("IServiceResult");
}
facilityImports.Add("IHttpClientOptions");
}
WriteImports(code, facilityImports, "facility-core");
if (TypeScript)
{
WriteImports(code, typeNames, $"./{Uncapitalize(moduleName)}Types");
code.WriteLine($"export * from './{Uncapitalize(moduleName)}Types';");
}
code.WriteLine();
WriteJsDoc(code, $"Provides access to {capModuleName} over HTTP via fetch.");
using (code.Block("export function createHttpClient({ fetch, baseUri }" + IfTypeScript(": IHttpClientOptions") + ")" + IfTypeScript($": I{capModuleName}") + " {", "}"))
code.WriteLine($"return new {capModuleName}HttpClient(fetch, baseUri);");
code.WriteLine();
code.WriteLine("const { fetchResponse, createResponseError, createRequiredRequestFieldError } = HttpClientUtility;");
if (TypeScript)
{
code.WriteLine("type IFetch = HttpClientUtility.IFetch;");
code.WriteLine("type IFetchRequest = HttpClientUtility.IFetchRequest;");
}
code.WriteLine();
using (code.Block($"class {capModuleName}HttpClient" + IfTypeScript($" implements I{capModuleName}") + " {", "}"))
{
using (code.Block("constructor(fetch" + IfTypeScript(": IFetch") + ", baseUri" + IfTypeScript("?: string") + ") {", "}"))
{
using (code.Block("if (typeof fetch !== 'function') {", "}"))
code.WriteLine("throw new TypeError('fetch must be a function.');");
using (code.Block("if (typeof baseUri === 'undefined') {", "}"))
code.WriteLine($"baseUri = '{httpServiceInfo.Url ?? ""}';");
using (code.Block(@"if (/[^\/]$/.test(baseUri)) {", "}"))
code.WriteLine("baseUri += '/';");
code.WriteLine("this._fetch = fetch;");
code.WriteLine("this._baseUri = baseUri;");
}
foreach (var httpMethodInfo in httpServiceInfo.Methods)
{
var methodName = httpMethodInfo.ServiceMethod.Name;
var capMethodName = CodeGenUtility.Capitalize(methodName);
code.WriteLine();
WriteJsDoc(code, httpMethodInfo.ServiceMethod);
using (code.Block(IfTypeScript("public ") + $"{methodName}(request" + IfTypeScript($": I{capMethodName}Request") + ")" + IfTypeScript($": Promise<IServiceResult<I{capMethodName}Response>>") + " {", "}"))
{
var hasPathFields = httpMethodInfo.PathFields.Count != 0;
var jsUriDelim = hasPathFields ? "`" : "'";
var jsUri = jsUriDelim + httpMethodInfo.Path.Substring(1) + jsUriDelim;
if (hasPathFields)
{
foreach (var httpPathField in httpMethodInfo.PathFields)
{
code.WriteLine($"const uriPart{CodeGenUtility.Capitalize(httpPathField.ServiceField.Name)} = request.{httpPathField.ServiceField.Name} != null && {RenderUriComponent(httpPathField.ServiceField, service)};");
using (code.Block($"if (!uriPart{CodeGenUtility.Capitalize(httpPathField.ServiceField.Name)}) {{", "}"))
code.WriteLine($"return Promise.resolve(createRequiredRequestFieldError('{httpPathField.ServiceField.Name}'));");
}
foreach (var httpPathField in httpMethodInfo.PathFields)
{
jsUri = jsUri.Replace("{" + httpPathField.Name + "}", $"${{uriPart{CodeGenUtility.Capitalize(httpPathField.ServiceField.Name)}}}");
}
}
var hasQueryFields = httpMethodInfo.QueryFields.Count != 0;
code.WriteLine((hasQueryFields ? "let" : "const") + $" uri = {jsUri};");
if (hasQueryFields)
{
code.WriteLine("const query" + IfTypeScript(": string[]") + " = [];");
foreach (var httpQueryField in httpMethodInfo.QueryFields)
{
code.WriteLine($"request.{httpQueryField.ServiceField.Name} == null || query.push('{httpQueryField.Name}=' + {RenderUriComponent(httpQueryField.ServiceField, service)});");
}
using (code.Block("if (query.length) {", "}"))
code.WriteLine("uri = uri + '?' + query.join('&');");
}
using (code.Block("const fetchRequest" + IfTypeScript(": IFetchRequest") + " = {", "};"))
{
if (httpMethodInfo.RequestBodyField == null && httpMethodInfo.RequestNormalFields.Count == 0)
{
code.WriteLine($"method: '{httpMethodInfo.Method}',");
if (httpMethodInfo.RequestHeaderFields.Count != 0)
{
code.WriteLine("headers: {},");
}
}
else
{
code.WriteLine($"method: '{httpMethodInfo.Method}',");
code.WriteLine("headers: { 'Content-Type': 'application/json' },");
if (httpMethodInfo.RequestBodyField != null)
{
code.WriteLine($"body: JSON.stringify(request.{httpMethodInfo.RequestBodyField.ServiceField.Name})");
}
else if (httpMethodInfo.ServiceMethod.RequestFields.Count == httpMethodInfo.RequestNormalFields.Count)
{
code.WriteLine("body: JSON.stringify(request)");
}
else
{
using (code.Block("body: JSON.stringify({", "})"))
{
for (var httpFieldIndex = 0; httpFieldIndex < httpMethodInfo.RequestNormalFields.Count; httpFieldIndex++)
{
var httpFieldInfo = httpMethodInfo.RequestNormalFields[httpFieldIndex];
var isLastField = httpFieldIndex == httpMethodInfo.RequestNormalFields.Count - 1;
var fieldName = httpFieldInfo.ServiceField.Name;
code.WriteLine(fieldName + ": request." + fieldName + (isLastField ? "" : ","));
}
}
}
}
}
if (httpMethodInfo.RequestHeaderFields.Count != 0)
{
foreach (var httpHeaderField in httpMethodInfo.RequestHeaderFields)
{
using (code.Block($"if (request.{httpHeaderField.ServiceField.Name} != null) {{", "}"))
code.WriteLine($"fetchRequest.headers['{httpHeaderField.Name}'] = request.{httpHeaderField.ServiceField.Name};");
}
}
code.WriteLine("return fetchResponse(this._fetch, this._baseUri + uri, fetchRequest)");
using (code.Indent())
using (code.Block(".then(result => {", "});"))
{
code.WriteLine("const status = result.response.status;");
code.WriteLine("let value" + IfTypeScript($": I{capMethodName}Response | null") + " = null;");
using (code.Block("if (result.json) {", "}"))
{
var validResponses = httpMethodInfo.ValidResponses;
var elsePrefix = "";
foreach (var validResponse in validResponses)
{
var statusCodeAsString = ((int)validResponse.StatusCode).ToString(CultureInfo.InvariantCulture);
code.WriteLine($"{elsePrefix}if (status === {statusCodeAsString}) {{");
elsePrefix = "else ";
using (code.Indent())
{
var bodyField = validResponse.BodyField;
if (bodyField != null)
{
var responseBodyFieldName = bodyField.ServiceField.Name;
var bodyFieldType = service.GetFieldType(bodyField.ServiceField) !;
if (bodyFieldType.Kind == ServiceTypeKind.Boolean)
{
code.WriteLine($"value = {{ {responseBodyFieldName}: true }};");
}
else
{
code.WriteLine($"value = {{ {responseBodyFieldName}: result.json }};");
}
}
else
{
if (validResponse.NormalFields !.Count == 0)
{
code.WriteLine("value = {};");
}