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/*
* Copyright 2018 OpenAPI-Generator Contributors (https://openapi-generator.tech)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.openapitools.codegen.languages;
import io.swagger.v3.oas.models.media.Schema;
import lombok.Setter;
import org.openapitools.codegen.CodegenConstants;
import org.openapitools.codegen.CodegenType;
import org.openapitools.codegen.CodegenModel;
import org.openapitools.codegen.CodegenParameter;
import org.openapitools.codegen.CodegenProperty;
import org.openapitools.codegen.CodegenResponse;
import org.openapitools.codegen.SupportingFile;
import org.openapitools.codegen.meta.GeneratorMetadata;
import org.openapitools.codegen.meta.Stability;
import org.openapitools.codegen.utils.ModelUtils;
import java.io.File;
import java.util.*;
import static org.openapitools.codegen.utils.StringUtils.camelize;
public class CppUE4ClientCodegen extends AbstractCppCodegen {
public static final String CPP_NAMESPACE = "cppNamespace";
public static final String CPP_NAMESPACE_DESC = "C++ namespace (convention: name::space::for::api).";
public static final String UNREAL_MODULE_NAME = "unrealModuleName";
public static final String UNREAL_MODULE_NAME_DESC = "Name of the generated unreal module (optional)";
public static final String OPTIONAL_PROJECT_FILE_DESC = "Generate Build.cs";
protected String unrealModuleName = "OpenAPI";
// Will be treated as pointer
protected Set pointerClasses = new HashSet<>();
// source folder where to write the files
protected String privateFolder = "Private";
protected String publicFolder = "Public";
protected String apiVersion = "1.0.0";
protected Map namespaces = new HashMap<>();
// Will be included using the <> syntax, not used in Unreal's coding convention
protected Set systemIncludes = new HashSet<>();
protected String cppNamespace = unrealModuleName;
@Setter protected boolean optionalProjectFileFlag = true;
public CppUE4ClientCodegen() {
super();
generatorMetadata = GeneratorMetadata.newBuilder(generatorMetadata)
.stability(Stability.BETA)
.build();
// set the output folder here
outputFolder = "generated-code/cpp-ue4";
// set modelNamePrefix as default for cpp-ue4
if ("".equals(modelNamePrefix)) {
modelNamePrefix = unrealModuleName;
}
/*
* Models. You can write model files using the modelTemplateFiles map.
* if you want to create one template for file, you can do so here.
* for multiple files for model, just put another entry in the `modelTemplateFiles` with
* a different extension
*/
modelTemplateFiles.put(
"model-header.mustache",
".h");
modelTemplateFiles.put(
"model-source.mustache",
".cpp");
/*
* Api classes. You can write classes for each Api file with the apiTemplateFiles map.
* as with models, add multiple entries with different extensions for multiple files per
* class
*/
apiTemplateFiles.put(
"api-header.mustache", // the template to use
".h"); // the extension for each file to write
apiTemplateFiles.put(
"api-source.mustache", // the template to use
".cpp"); // the extension for each file to write
apiTemplateFiles.put(
"api-operations-header.mustache", // the template to use
".h"); // the extension for each file to write
apiTemplateFiles.put(
"api-operations-source.mustache", // the template to use
".cpp"); // the extension for each file to write
/*
* Template Location. This is the location which templates will be read from. The generator
* will use the resource stream to attempt to read the templates.
*/
embeddedTemplateDir = templateDir = "cpp-ue4";
// CLI options
addOption(CPP_NAMESPACE, CPP_NAMESPACE_DESC, this.cppNamespace);
addOption(UNREAL_MODULE_NAME, UNREAL_MODULE_NAME_DESC, this.unrealModuleName);
addSwitch(CodegenConstants.OPTIONAL_PROJECT_FILE, OPTIONAL_PROJECT_FILE_DESC, this.optionalProjectFileFlag);
/*
* Additional Properties. These values can be passed to the templates and
* are available in models, apis, and supporting files
*/
additionalProperties.put("apiVersion", apiVersion);
additionalProperties().put("modelNamePrefix", modelNamePrefix);
additionalProperties().put("modelPackage", modelPackage);
additionalProperties().put("apiPackage", apiPackage);
additionalProperties().put("dllapi", unrealModuleName.toUpperCase(Locale.ROOT) + "_API");
additionalProperties().put("unrealModuleName", unrealModuleName);
// Write defaults namespace in properties so that it can be accessible in templates.
// At this point command line has not been parsed so if value is given
// in command line it will supersede this content
additionalProperties.put("cppNamespace", cppNamespace);
additionalProperties.put("unrealModuleName", unrealModuleName);
/*
* Language Specific Primitives. These types will not trigger imports by
* the client generator
*/
languageSpecificPrimitives = new HashSet<>(
Arrays.asList(
"bool",
"int32",
"int64",
"float",
"double",
"FString",
"FDateTime",
"FGuid",
"TArray",
"TArray", // For byte arrays
"TMap",
"TSet",
"TSharedPtr",
"TSharedPtr")
);
supportingFiles.add(new SupportingFile("model-base-header.mustache", publicFolder, modelNamePrefix + "BaseModel.h"));
supportingFiles.add(new SupportingFile("model-base-source.mustache", privateFolder, modelNamePrefix + "BaseModel.cpp"));
supportingFiles.add(new SupportingFile("helpers-header.mustache", publicFolder, modelNamePrefix + "Helpers.h"));
supportingFiles.add(new SupportingFile("helpers-source.mustache", privateFolder, modelNamePrefix + "Helpers.cpp"));
if (optionalProjectFileFlag) {
supportingFiles.add(new SupportingFile("Build.cs.mustache", unrealModuleName + ".Build.cs"));
supportingFiles.add(new SupportingFile("module-header.mustache", privateFolder, unrealModuleName + "Module.h"));
supportingFiles.add(new SupportingFile("module-source.mustache", privateFolder, unrealModuleName + "Module.cpp"));
}
super.typeMapping = new HashMap<>();
// Maps C++ types during call to getSchemaType, see DefaultCodegen.getSchemaType and not the types/formats
// defined in openapi specification "array" is also used explicitly in the generator for containers
typeMapping.clear();
typeMapping.put("integer", "int32");
typeMapping.put("long", "int64");
typeMapping.put("float", "float");
typeMapping.put("number", "double");
typeMapping.put("double", "double");
typeMapping.put("string", "FString");
typeMapping.put("byte", "uint8");
typeMapping.put("binary", "TArray");
typeMapping.put("ByteArray", "TArray");
typeMapping.put("password", "FString");
typeMapping.put("boolean", "bool");
typeMapping.put("date", "FDateTime");
typeMapping.put("Date", "FDateTime");
typeMapping.put("date-time", "FDateTime");
typeMapping.put("DateTime", "FDateTime");
typeMapping.put("array", "TArray");
typeMapping.put("set", "TSet");
typeMapping.put("list", "TArray");
typeMapping.put("map", "TMap");
typeMapping.put("object", "TSharedPtr");
typeMapping.put("Object", "TSharedPtr");
typeMapping.put("file", "HttpFileInput");
typeMapping.put("UUID", "FGuid");
typeMapping.put("AnyType", "TSharedPtr");
importMapping = new HashMap<>();
importMapping.put("HttpFileInput", "#include \"" + modelNamePrefix + "Helpers.h\"");
namespaces = new HashMap<>();
}
@Override
public void processOpts() {
super.processOpts();
if (additionalProperties.containsKey("cppNamespace")) {
cppNamespace = (String) additionalProperties.get("cppNamespace");
}
additionalProperties.put("cppNamespaceDeclarations", cppNamespace.split("\\::"));
boolean updateSupportingFiles = false;
if (additionalProperties.containsKey("unrealModuleName")) {
unrealModuleName = (String) additionalProperties.get("unrealModuleName");
additionalProperties().put("dllapi", unrealModuleName.toUpperCase(Locale.ROOT) + "_API");
modelNamePrefix = unrealModuleName;
updateSupportingFiles = true;
}
if (additionalProperties.containsKey("modelNamePrefix")) {
modelNamePrefix = (String) additionalProperties.get("modelNamePrefix");
updateSupportingFiles = true;
}
if (additionalProperties.containsKey(CodegenConstants.OPTIONAL_PROJECT_FILE)) {
setOptionalProjectFileFlag(convertPropertyToBooleanAndWriteBack(CodegenConstants.OPTIONAL_PROJECT_FILE));
} else {
additionalProperties.put(CodegenConstants.OPTIONAL_PROJECT_FILE, optionalProjectFileFlag);
}
if (updateSupportingFiles) {
supportingFiles.clear();
supportingFiles.add(new SupportingFile("model-base-header.mustache", publicFolder, modelNamePrefix + "BaseModel.h"));
supportingFiles.add(new SupportingFile("model-base-source.mustache", privateFolder, modelNamePrefix + "BaseModel.cpp"));
supportingFiles.add(new SupportingFile("helpers-header.mustache", publicFolder, modelNamePrefix + "Helpers.h"));
supportingFiles.add(new SupportingFile("helpers-source.mustache", privateFolder, modelNamePrefix + "Helpers.cpp"));
if (optionalProjectFileFlag) {
supportingFiles.add(new SupportingFile("Build.cs.mustache", unrealModuleName + ".Build.cs"));
supportingFiles.add(new SupportingFile("module-header.mustache", privateFolder, unrealModuleName + "Module.h"));
supportingFiles.add(new SupportingFile("module-source.mustache", privateFolder, unrealModuleName + "Module.cpp"));
}
importMapping.put("HttpFileInput", "#include \"" + modelNamePrefix + "Helpers.h\"");
}
}
// override to post-process any model properties
@Override
@SuppressWarnings("unused")
public void postProcessModelProperty(CodegenModel model, CodegenProperty property) {
super.postProcessModelProperty(model, property);
// Nullable will be handled as optional
property.required = !property.notRequiredOrIsNullable();
}
// override to post-process any response
@Override
@SuppressWarnings("unused")
public void postProcessResponseWithProperty(CodegenResponse response, CodegenProperty property) {
super.postProcessResponseWithProperty(response, property);
// Nullable will be handled as optional
property.required = !property.notRequiredOrIsNullable();
}
// override to post-process any parameters
@Override
@SuppressWarnings("unused")
public void postProcessParameter(CodegenParameter parameter) {
super.postProcessParameter(parameter);
// Nullable will be handled as optional
parameter.required = !parameter.notRequiredOrIsNullable();
}
/**
* Configures the type of generator.
*
* @return the CodegenType for this generator
* @see org.openapitools.codegen.CodegenType
*/
@Override
public CodegenType getTag() {
return CodegenType.CLIENT;
}
/**
* Configures a friendly name for the generator. This will be used by the generator
* to select the library with the -l flag.
*
* @return the friendly name for the generator
*/
@Override
public String getName() {
return "cpp-ue4";
}
/**
* Returns human-friendly help for the generator. Provide the consumer with help
* tips, parameters here
*
* @return A string value for the help message
*/
@Override
public String getHelp() {
return "Generates a Unreal Engine 4 C++ Module (beta).";
}
@Override
public String toModelImport(String name) {
if (namespaces.containsKey(name)) {
return "using " + namespaces.get(name) + ";";
} else if (systemIncludes.contains(name)) {
return "#include <" + name + ">";
}
String folder = modelPackage().replace("::", File.separator);
if (!folder.isEmpty())
folder += File.separator;
return "#include \"" + folder + name + ".h\"";
}
@Override
protected boolean needToImport(String type) {
boolean shouldImport = super.needToImport(type);
if (shouldImport)
return !languageSpecificPrimitives.contains(type);
else
return false;
}
/**
* Escapes a reserved word as defined in the `reservedWords` array. Handle escaping
* those terms here. This logic is only called if a variable matches the reserved words
*
* @return the escaped term
*/
@Override
public String escapeReservedWord(String name) {
if (this.reservedWordsMappings().containsKey(name)) {
return this.reservedWordsMappings().get(name);
}
return "_" + name;
}
/**
* Location to write model files. You can use the modelPackage() as defined when the class is
* instantiated
*/
@Override
public String modelFileFolder() {
return outputFolder + File.separator + modelPackage().replace("::", File.separator);
}
/**
* Location to write api files. You can use the apiPackage() as defined when the class is
* instantiated
*/
@Override
public String apiFileFolder() {
return outputFolder + File.separator + apiPackage().replace("::", File.separator);
}
@Override
public String modelFilename(String templateName, String modelName) {
String suffix = modelTemplateFiles().get(templateName);
String folder = privateFolder;
if (".h".equals(suffix)) {
folder = publicFolder;
}
return modelFileFolder() + File.separator + folder + File.separator + toModelFilename(modelName) + suffix;
}
@Override
public String toModelFilename(String name) {
name = sanitizeName(name);
return modelNamePrefix + camelize(name);
}
@Override
public String apiFilename(String templateName, String tag) {
String suffix = apiTemplateFiles().get(templateName);
String folder = privateFolder;
if (".h".equals(suffix)) {
folder = publicFolder;
}
if (templateName.startsWith("api-operations")) {
return apiFileFolder() + File.separator + folder + File.separator + toApiFilename(tag) + "Operations" + suffix;
} else {
return apiFileFolder() + File.separator + folder + File.separator + toApiFilename(tag) + suffix;
}
}
@Override
public String toApiFilename(String name) {
name = sanitizeName(name);
return modelNamePrefix + camelize(name) + "Api";
}
/**
* Optional - type declaration. This is a String which is used by the templates to instantiate your
* types. There is typically special handling for different property types
*
* @return a string value used as the `dataType` field for model templates, `returnType` for api templates
*/
@Override
public String getTypeDeclaration(Schema p) {
String openAPIType = getSchemaType(p);
if (ModelUtils.isArraySchema(p)) {
return getSchemaType(p) + "<" + getTypeDeclaration(ModelUtils.getSchemaItems(p)) + ">";
} else if (ModelUtils.isMapSchema(p)) {
return getSchemaType(p) + "";
}
if (pointerClasses.contains(openAPIType)) {
return openAPIType + "*";
} else if (languageSpecificPrimitives.contains(openAPIType)) {
return toModelName(openAPIType);
} else {
return openAPIType;
}
}
@Override
public String getTypeDeclaration(String name) {
return name;
}
@Override
public String toDefaultValue(Schema p) {
if (ModelUtils.isStringSchema(p)) {
if (p.getDefault() != null) {
return "TEXT(\"" + p.getDefault().toString() + "\")";
} else {
return null;
}
} else if (ModelUtils.isBooleanSchema(p)) {
if (p.getDefault() != null) {
return p.getDefault().toString();
} else {
return "false";
}
} else if (ModelUtils.isDateSchema(p)) {
return "FDateTime(0)";
} else if (ModelUtils.isDateTimeSchema(p)) {
return "FDateTime(0)";
} else if (ModelUtils.isDoubleSchema(p)) {
if (p.getDefault() != null) {
return p.getDefault().toString();
} else {
return "0.0";
}
} else if (ModelUtils.isFloatSchema(p)) {
if (p.getDefault() != null) {
return p.getDefault().toString();
} else {
return "0.0f";
}
} else if (ModelUtils.isIntegerSchema(p)) {
if (p.getDefault() != null) {
return p.getDefault().toString();
} else {
return "0";
}
} else if (ModelUtils.isLongSchema(p)) {
if (p.getDefault() != null) {
return p.getDefault().toString();
} else {
return "0";
}
}
return null;
}
/**
* Optional - OpenAPI type conversion. This is used to map OpenAPI types in a `Property` into
* either language specific types via `typeMapping` or into complex models if there is not a mapping.
*
* @return a string value of the type or complex model for this property
* @see io.swagger.v3.oas.models.media.Schema
*/
@Override
public String getSchemaType(Schema p) {
String openAPIType = super.getSchemaType(p);
String type = null;
if (typeMapping.containsKey(openAPIType)) {
type = typeMapping.get(openAPIType);
if (languageSpecificPrimitives.contains(type)) {
return toModelName(type);
}
if (pointerClasses.contains(type)) {
return type;
}
} else {
type = openAPIType;
}
return toModelName(type);
}
@Override
public String toModelName(String type) {
if (typeMapping.keySet().contains(type) ||
typeMapping.values().contains(type) ||
importMapping.values().contains(type) ||
defaultIncludes.contains(type) ||
languageSpecificPrimitives.contains(type)) {
return type;
} else {
return modelNamePrefix + camelize(sanitizeName(type));
}
}
@Override
public String toVarName(String name) {
// sanitize name
name = sanitizeName(name); // FIXME: a parameter should not be assigned. Also declare the methods parameters as 'final'.
// if it's all upper case, convert to lower case
if (name.matches("^[A-Z_]*$")) {
name = name.toLowerCase(Locale.ROOT);
}
//Unreal variable names are CamelCase
String camelCaseName = camelize(name);
//Avoid empty variable name at all costs
if(!camelCaseName.isEmpty()) {
name = camelCaseName;
}
// for reserved word or word starting with number, append _
if (isReservedWord(name) || name.matches("^\\d.*")) {
name = escapeReservedWord(name);
}
return name;
}
@Override
public String toEnumVarName(String name, String datatype) {
return toVarName(name);
}
@Override
public String toParamName(String name) {
return toVarName(name);
}
@Override
public String toApiName(String type) {
return modelNamePrefix + camelize(type) + "Api";
}
@Override
public String toBooleanGetter(String name) {
return "Is" + getterAndSetterCapitalize(name);
}
@Override
public String toGetter(String name) {
return "Get" + getterAndSetterCapitalize(name);
}
@Override
public String toSetter(String name) {
return "Set" + getterAndSetterCapitalize(name);
}
}
