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/*
* Copyright 2018 OpenAPI-Generator Contributors (https://openapi-generator.tech)
* Copyright 2018 SmartBear Software
*
* 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 com.samskivert.mustache.Mustache;
import com.samskivert.mustache.Template;
import io.swagger.v3.oas.models.media.*;
import io.swagger.v3.parser.util.SchemaTypeUtil;
import joptsimple.internal.Strings;
import lombok.AccessLevel;
import lombok.Setter;
import org.openapitools.codegen.*;
import org.openapitools.codegen.meta.features.*;
import org.openapitools.codegen.model.ModelMap;
import org.openapitools.codegen.model.ModelsMap;
import org.openapitools.codegen.model.OperationMap;
import org.openapitools.codegen.model.OperationsMap;
import org.openapitools.codegen.utils.ModelUtils;
import org.openapitools.codegen.utils.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.IOException;
import java.io.Writer;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.*;
import java.util.stream.Collectors;
public class RustClientCodegen extends AbstractRustCodegen implements CodegenConfig {
private final Logger LOGGER = LoggerFactory.getLogger(RustClientCodegen.class);
@Setter(AccessLevel.PRIVATE) private boolean useSingleRequestParameter = false;
@Setter(AccessLevel.PRIVATE) private boolean supportAsync = true;
@Setter(AccessLevel.PRIVATE) private boolean supportMiddleware = false;
private boolean supportMultipleResponses = false;
private boolean withAWSV4Signature = false;
@Setter private boolean preferUnsignedInt = false;
@Setter private boolean bestFitInt = false;
@Setter private boolean avoidBoxedModels = false;
public static final String PACKAGE_NAME = "packageName";
public static final String PACKAGE_VERSION = "packageVersion";
public static final String HYPER_LIBRARY = "hyper";
public static final String REQWEST_LIBRARY = "reqwest";
public static final String SUPPORT_ASYNC = "supportAsync";
public static final String SUPPORT_MIDDLEWARE = "supportMiddleware";
public static final String SUPPORT_MULTIPLE_RESPONSES = "supportMultipleResponses";
public static final String PREFER_UNSIGNED_INT = "preferUnsignedInt";
public static final String BEST_FIT_INT = "bestFitInt";
public static final String AVOID_BOXED_MODELS = "avoidBoxedModels";
@Setter protected String packageName = "openapi";
@Setter protected String packageVersion = "1.0.0";
protected String apiDocPath = "docs/";
protected String modelDocPath = "docs/";
protected String apiFolder = "src/apis";
protected String modelFolder = "src/models";
@Override
public CodegenType getTag() {
return CodegenType.CLIENT;
}
@Override
public String getName() {
return "rust";
}
@Override
public String getHelp() {
return "Generates a Rust client library (beta).";
}
public RustClientCodegen() {
super();
modifyFeatureSet(features -> features
.includeDocumentationFeatures(DocumentationFeature.Readme)
.wireFormatFeatures(EnumSet.of(WireFormatFeature.JSON, WireFormatFeature.XML, WireFormatFeature.Custom))
.securityFeatures(EnumSet.of(
SecurityFeature.BasicAuth,
SecurityFeature.BearerToken,
SecurityFeature.ApiKey,
SecurityFeature.OAuth2_Implicit,
SecurityFeature.AWSV4Signature
))
.excludeGlobalFeatures(
GlobalFeature.XMLStructureDefinitions,
GlobalFeature.Callbacks,
GlobalFeature.LinkObjects,
GlobalFeature.ParameterStyling
)
.excludeSchemaSupportFeatures(
SchemaSupportFeature.Polymorphism
)
.excludeParameterFeatures(
ParameterFeature.Cookie
)
.includeSchemaSupportFeatures(
SchemaSupportFeature.oneOf
)
.includeClientModificationFeatures(
ClientModificationFeature.BasePath,
ClientModificationFeature.UserAgent
)
);
outputFolder = "generated-code/rust";
modelTemplateFiles.put("model.mustache", ".rs");
modelDocTemplateFiles.put("model_doc.mustache", ".md");
apiDocTemplateFiles.put("api_doc.mustache", ".md");
// default HIDE_GENERATION_TIMESTAMP to true
hideGenerationTimestamp = Boolean.TRUE;
embeddedTemplateDir = templateDir = "rust";
defaultIncludes = new HashSet<>(
Arrays.asList(
"map",
"array")
);
languageSpecificPrimitives = new HashSet<>(
Arrays.asList(
"i8", "i16", "i32", "i64",
"u8", "u16", "u32", "u64",
"f32", "f64", "isize", "usize",
"char", "bool", "str", "String")
);
instantiationTypes.clear();
/*instantiationTypes.put("array", "GoArray");
instantiationTypes.put("map", "GoMap");*/
typeMapping.clear();
typeMapping.put("integer", "i32");
typeMapping.put("long", "i64");
typeMapping.put("number", "f64");
typeMapping.put("float", "f32");
typeMapping.put("double", "f64");
typeMapping.put("boolean", "bool");
typeMapping.put("string", "String");
typeMapping.put("array", "Vec");
typeMapping.put("map", "std::collections::HashMap");
typeMapping.put("UUID", "uuid::Uuid");
typeMapping.put("URI", "String");
typeMapping.put("date", "string");
typeMapping.put("DateTime", "String");
typeMapping.put("password", "String");
// TODO(bcourtine): review file mapping.
// I tried to map as "std::io::File", but Reqwest multipart file requires a "AsRef" param.
// Getting a file from a Path is simple, but the opposite is difficult. So I map as "std::path::Path".
typeMapping.put("file", "std::path::PathBuf");
typeMapping.put("binary", "crate::models::File");
typeMapping.put("ByteArray", "String");
typeMapping.put("object", "serde_json::Value");
typeMapping.put("AnyType", "serde_json::Value");
// no need for rust
//importMapping = new HashMap();
cliOptions.clear();
cliOptions.add(new CliOption(CodegenConstants.PACKAGE_NAME, "Rust package name (convention: lowercase).")
.defaultValue("openapi"));
cliOptions.add(new CliOption(CodegenConstants.PACKAGE_VERSION, "Rust package version.")
.defaultValue("1.0.0"));
cliOptions.add(new CliOption(CodegenConstants.HIDE_GENERATION_TIMESTAMP, CodegenConstants.HIDE_GENERATION_TIMESTAMP_DESC)
.defaultValue(Boolean.TRUE.toString()));
cliOptions.add(new CliOption(CodegenConstants.USE_SINGLE_REQUEST_PARAMETER, CodegenConstants.USE_SINGLE_REQUEST_PARAMETER_DESC, SchemaTypeUtil.BOOLEAN_TYPE)
.defaultValue(Boolean.FALSE.toString()));
cliOptions.add(new CliOption(SUPPORT_ASYNC, "If set, generate async function call instead. This option is for 'reqwest' library only", SchemaTypeUtil.BOOLEAN_TYPE)
.defaultValue(Boolean.TRUE.toString()));
cliOptions.add(new CliOption(SUPPORT_MIDDLEWARE, "If set, add support for reqwest-middleware. This option is for 'reqwest' library only", SchemaTypeUtil.BOOLEAN_TYPE)
.defaultValue(Boolean.FALSE.toString()));
cliOptions.add(new CliOption(SUPPORT_MULTIPLE_RESPONSES, "If set, return type wraps an enum of all possible 2xx schemas. This option is for 'reqwest' library only", SchemaTypeUtil.BOOLEAN_TYPE)
.defaultValue(Boolean.FALSE.toString()));
cliOptions.add(new CliOption(CodegenConstants.ENUM_NAME_SUFFIX, CodegenConstants.ENUM_NAME_SUFFIX_DESC).defaultValue(this.enumSuffix));
cliOptions.add(new CliOption(CodegenConstants.WITH_AWSV4_SIGNATURE_COMMENT, CodegenConstants.WITH_AWSV4_SIGNATURE_COMMENT_DESC, SchemaTypeUtil.BOOLEAN_TYPE)
.defaultValue(Boolean.FALSE.toString()));
cliOptions.add(new CliOption(PREFER_UNSIGNED_INT, "Prefer unsigned integers where minimum value is >= 0", SchemaTypeUtil.BOOLEAN_TYPE)
.defaultValue(Boolean.FALSE.toString()));
cliOptions.add(new CliOption(BEST_FIT_INT, "Use best fitting integer type where minimum or maximum is set", SchemaTypeUtil.BOOLEAN_TYPE)
.defaultValue(Boolean.FALSE.toString()));
cliOptions.add(new CliOption(AVOID_BOXED_MODELS, "If set, `Box` will not be used for models", SchemaTypeUtil.BOOLEAN_TYPE)
.defaultValue(Boolean.FALSE.toString()));
supportedLibraries.put(HYPER_LIBRARY, "HTTP client: Hyper.");
supportedLibraries.put(REQWEST_LIBRARY, "HTTP client: Reqwest.");
CliOption libraryOption = new CliOption(CodegenConstants.LIBRARY, "library template (sub-template) to use.");
libraryOption.setEnum(supportedLibraries);
// set reqwest as the default
libraryOption.setDefault(REQWEST_LIBRARY);
cliOptions.add(libraryOption);
setLibrary(REQWEST_LIBRARY);
}
@Override
public CodegenModel fromModel(String name, Schema model) {
CodegenModel mdl = super.fromModel(name, model);
// set correct names and baseNames to oneOf in composed-schema to use as enum variant names & mapping
if (mdl.getComposedSchemas() != null && mdl.getComposedSchemas().getOneOf() != null
&& !mdl.getComposedSchemas().getOneOf().isEmpty()) {
List newOneOfs = mdl.getComposedSchemas().getOneOf().stream()
.map(CodegenProperty::clone)
.collect(Collectors.toList());
List schemas = ModelUtils.getInterfaces(model);
if (newOneOfs.size() != schemas.size()) {
// For safety reasons, this should never happen unless there is an error in the code
throw new RuntimeException("oneOf size does not match the model");
}
Map refsMapping = Optional.ofNullable(model.getDiscriminator())
.map(Discriminator::getMapping).orElse(Collections.emptyMap());
// Reverse mapped references to use as baseName for oneOF, but different keys may point to the same $ref.
// Thus, we group them by the value
Map> mappedNamesByRef = refsMapping.entrySet().stream()
.collect(Collectors.groupingBy(Map.Entry::getValue,
Collectors.mapping(Map.Entry::getKey, Collectors.toList())
));
for (int i = 0; i < newOneOfs.size(); i++) {
CodegenProperty oneOf = newOneOfs.get(i);
Schema schema = schemas.get(i);
if (mappedNamesByRef.containsKey(schema.get$ref())) {
// prefer mapped names if present
// remove mapping not in order not to reuse for the next occurrence of the ref
List names = mappedNamesByRef.get(schema.get$ref());
String mappedName = names.remove(0);
oneOf.setBaseName(mappedName);
oneOf.setName(toModelName(mappedName));
} else if (!org.apache.commons.lang3.StringUtils.isEmpty(schema.get$ref())) {
// use $ref if it's reference
String refName = ModelUtils.getSimpleRef(schema.get$ref());
if (refName != null) {
String modelName = toModelName(refName);
oneOf.setName(modelName);
oneOf.setBaseName(refName);
}
} else {
// In-placed type (primitive), because there is no mapping or ref for it.
// use camelized `title` if present, otherwise use `type`
String oneOfName = Optional.ofNullable(schema.getTitle()).orElseGet(schema::getType);
oneOf.setName(toModelName(oneOfName));
}
}
mdl.getComposedSchemas().setOneOf(newOneOfs);
}
return mdl;
}
@Override
public ModelsMap postProcessModels(ModelsMap objs) {
for (ModelMap model : objs.getModels()) {
CodegenModel cm = model.getModel();
// Remove the discriminator field from the model, serde will take care of this
if (cm.discriminator != null) {
String reserved_var_name = cm.discriminator.getPropertyBaseName();
for (CodegenProperty cp : cm.vars) {
if (cp.baseName.equals(reserved_var_name)) {
cm.vars.remove(cp);
break;
}
}
}
// Flag structs with byteArrays in them so that we can annotate them with the serde_as macro
for (CodegenProperty cp : cm.vars) {
if (cp.isByteArray) {
cm.vendorExtensions.put("x-rust-has-byte-array", true);
break;
}
}
}
// process enum in models
return postProcessModelsEnum(objs);
}
@Override
public void processOpts() {
super.processOpts();
if (additionalProperties.containsKey(CodegenConstants.WITH_AWSV4_SIGNATURE_COMMENT)) {
withAWSV4Signature = Boolean.parseBoolean(additionalProperties.get(CodegenConstants.WITH_AWSV4_SIGNATURE_COMMENT).toString());
}
if (additionalProperties.containsKey(CodegenConstants.ENUM_NAME_SUFFIX)) {
enumSuffix = additionalProperties.get(CodegenConstants.ENUM_NAME_SUFFIX).toString();
}
if (additionalProperties.containsKey(CodegenConstants.PACKAGE_NAME)) {
setPackageName((String) additionalProperties.get(CodegenConstants.PACKAGE_NAME));
} else {
setPackageName("openapi");
}
// If no version is provided in additional properties, version from API specification is used.
// If none of them is provided then fallback to default version
if (additionalProperties.containsKey(CodegenConstants.PACKAGE_VERSION)) {
setPackageVersion((String) additionalProperties.get(CodegenConstants.PACKAGE_VERSION));
} else if (openAPI != null && openAPI.getInfo() != null && openAPI.getInfo().getVersion() != null) {
setPackageVersion(openAPI.getInfo().getVersion());
}
if (additionalProperties.containsKey(CodegenConstants.USE_SINGLE_REQUEST_PARAMETER)) {
this.setUseSingleRequestParameter(convertPropertyToBoolean(CodegenConstants.USE_SINGLE_REQUEST_PARAMETER));
}
writePropertyBack(CodegenConstants.USE_SINGLE_REQUEST_PARAMETER, getUseSingleRequestParameter());
if (additionalProperties.containsKey(SUPPORT_ASYNC)) {
this.setSupportAsync(convertPropertyToBoolean(SUPPORT_ASYNC));
}
writePropertyBack(SUPPORT_ASYNC, getSupportAsync());
if (additionalProperties.containsKey(SUPPORT_MIDDLEWARE)) {
this.setSupportMiddleware(convertPropertyToBoolean(SUPPORT_MIDDLEWARE));
}
writePropertyBack(SUPPORT_MIDDLEWARE, getSupportMiddleware());
if (additionalProperties.containsKey(SUPPORT_MULTIPLE_RESPONSES)) {
this.setSupportMultipleReturns(convertPropertyToBoolean(SUPPORT_MULTIPLE_RESPONSES));
}
writePropertyBack(SUPPORT_MULTIPLE_RESPONSES, getSupportMultipleReturns());
if (additionalProperties.containsKey(PREFER_UNSIGNED_INT)) {
this.setPreferUnsignedInt(convertPropertyToBoolean(PREFER_UNSIGNED_INT));
}
writePropertyBack(PREFER_UNSIGNED_INT, getPreferUnsignedInt());
if (additionalProperties.containsKey(BEST_FIT_INT)) {
this.setBestFitInt(convertPropertyToBoolean(BEST_FIT_INT));
}
writePropertyBack(BEST_FIT_INT, getBestFitInt());
if (additionalProperties.containsKey(AVOID_BOXED_MODELS)) {
this.setAvoidBoxedModels(convertPropertyToBoolean(AVOID_BOXED_MODELS));
}
writePropertyBack(AVOID_BOXED_MODELS, getAvoidBoxedModels());
additionalProperties.put(CodegenConstants.PACKAGE_NAME, packageName);
additionalProperties.put(CodegenConstants.PACKAGE_VERSION, packageVersion);
additionalProperties.put("apiDocPath", apiDocPath);
additionalProperties.put("modelDocPath", modelDocPath);
if (HYPER_LIBRARY.equals(getLibrary())) {
additionalProperties.put(HYPER_LIBRARY, "true");
} else if (REQWEST_LIBRARY.equals(getLibrary())) {
additionalProperties.put(REQWEST_LIBRARY, "true");
} else {
LOGGER.error("Unknown library option (-l/--library): {}", getLibrary());
}
apiTemplateFiles.put(getLibrary() + "/api.mustache", ".rs");
modelPackage = packageName;
apiPackage = packageName;
supportingFiles.add(new SupportingFile("README.mustache", "", "README.md"));
supportingFiles.add(new SupportingFile("git_push.sh.mustache", "", "git_push.sh"));
supportingFiles.add(new SupportingFile("gitignore.mustache", "", ".gitignore"));
supportingFiles.add(new SupportingFile(".travis.yml", "", ".travis.yml"));
supportingFiles.add(new SupportingFile("model_mod.mustache", modelFolder, "mod.rs"));
supportingFiles.add(new SupportingFile("lib.mustache", "src", "lib.rs"));
supportingFiles.add(new SupportingFile("Cargo.mustache", "", "Cargo.toml"));
supportingFiles.add(new SupportingFile(getLibrary() + "/api_mod.mustache", apiFolder, "mod.rs"));
supportingFiles.add(new SupportingFile(getLibrary() + "/configuration.mustache", apiFolder, "configuration.rs"));
if (HYPER_LIBRARY.equals(getLibrary())) {
supportingFiles.add(new SupportingFile("request.rs", apiFolder, "request.rs"));
supportingFiles.add(new SupportingFile(getLibrary() + "/client.mustache", apiFolder, "client.rs"));
}
// add lambda for sanitize version (e.g. v1.2.3-beta => 1.2.3-beta)
additionalProperties.put("lambdaVersion", new Mustache.Lambda() {
@Override
public void execute(Template.Fragment fragment, Writer writer) throws IOException {
String content = fragment.execute();
// remove v or V
content = content.trim().replace("v", "");
content = content.replace("V", "");
// convert 5.2 to 5.2.0 for example
String[] contents = content.split("[.]");
if (contents.length == 2) {
content += ".0";
}
writer.write(content);
}
});
}
private boolean getSupportAsync() {
return supportAsync;
}
private boolean getSupportMiddleware() {
return supportMiddleware;
}
public boolean getSupportMultipleReturns() {
return supportMultipleResponses;
}
public void setSupportMultipleReturns(boolean supportMultipleResponses) {
this.supportMultipleResponses = supportMultipleResponses;
}
public boolean getPreferUnsignedInt() {
return preferUnsignedInt;
}
public boolean getBestFitInt() {
return bestFitInt;
}
private boolean getUseSingleRequestParameter() {
return useSingleRequestParameter;
}
public boolean getAvoidBoxedModels() {
return avoidBoxedModels;
}
@Override
public String apiFileFolder() {
return (outputFolder + File.separator + apiFolder).replace("/", File.separator);
}
@Override
public String modelFileFolder() {
return (outputFolder + File.separator + modelFolder).replace("/", File.separator);
}
@Override
public String apiDocFileFolder() {
return (outputFolder + "/" + apiDocPath).replace('/', File.separatorChar);
}
@Override
public String modelDocFileFolder() {
return (outputFolder + "/" + modelDocPath).replace('/', File.separatorChar);
}
@Override
public String getTypeDeclaration(Schema p) {
// use unaliased schema for client-side
Schema unaliasSchema = unaliasSchema(p);
return super.getTypeDeclaration(unaliasSchema);
}
@Override
public String getSchemaType(Schema p) {
String schemaType = super.getSchemaType(p);
String type = typeMapping.getOrDefault(schemaType, schemaType);
// Implement integer type fitting (when property is enabled)
if (Objects.equals(p.getType(), "integer")) {
boolean bestFit = convertPropertyToBoolean(BEST_FIT_INT);
boolean preferUnsigned = convertPropertyToBoolean(PREFER_UNSIGNED_INT);
BigInteger minimum = Optional.ofNullable(p.getMinimum()).map(BigDecimal::toBigInteger).orElse(null);
boolean exclusiveMinimum = Optional.ofNullable(p.getExclusiveMinimum()).orElse(false);
boolean unsigned = preferUnsigned && canFitIntoUnsigned(minimum, exclusiveMinimum);
if (Strings.isNullOrEmpty(p.getFormat())) {
if (bestFit) {
return bestFittingIntegerType(
minimum,
exclusiveMinimum,
Optional.ofNullable(p.getMaximum()).map(BigDecimal::toBigInteger).orElse(null),
Optional.ofNullable(p.getExclusiveMaximum()).orElse(false),
preferUnsigned);
} else {
return unsigned ? "u32" : "i32";
}
} else {
switch (p.getFormat()) {
case "int32":
return unsigned ? "u32" : "i32";
case "int64":
return unsigned ? "u64" : "i64";
}
}
}
return type;
}
@Override
public void postProcessModelProperty(CodegenModel model, CodegenProperty property) {
super.postProcessModelProperty(model, property);
// If a property is both nullable and non-required then we represent this using a double Option
// which requires the `serde_with` extension crate for deserialization.
// See: https://docs.rs/serde_with/latest/serde_with/rust/double_option/index.html
if (property.isNullable && !property.required) {
additionalProperties.put("serdeWith", true);
}
// If a property is a base64-encoded byte array, use `serde_with` for deserialization.
if (property.isByteArray) {
additionalProperties.put("serdeWith", true);
}
}
@Override
public OperationsMap postProcessOperationsWithModels(OperationsMap objs, List allModels) {
OperationMap objectMap = objs.getOperations();
List operations = objectMap.getOperation();
for (CodegenOperation operation : operations) {
// http method verb conversion, depending on client library (e.g. Hyper: PUT => Put, Reqwest: PUT => put)
if (HYPER_LIBRARY.equals(getLibrary())) {
operation.httpMethod = StringUtils.camelize(operation.httpMethod.toLowerCase(Locale.ROOT));
} else if (REQWEST_LIBRARY.equals(getLibrary())) {
operation.httpMethod = operation.httpMethod.toUpperCase(Locale.ROOT);
}
// add support for single request parameter using x-group-parameters
if (!operation.vendorExtensions.containsKey("x-group-parameters") && useSingleRequestParameter) {
operation.vendorExtensions.put("x-group-parameters", Boolean.TRUE);
}
// update return type to conform to rust standard
/*
if (operation.returnType != null) {
if ( operation.returnType.startsWith("Vec") && !languageSpecificPrimitives.contains(operation.returnBaseType)) {
// array of model
String rt = operation.returnType;
int end = rt.lastIndexOf(">");
if ( end > 0 ) {
operation.vendorExtensions.put("x-returnTypeInMethod", "Vec");
operation.returnContainer = "List";
}
} else if (operation.returnType.startsWith("::std::collections::HashMap");
if ( end > 0 ) {
operation.vendorExtensions.put("x-returnTypeInMethod", "::std::collections::HashMap");
operation.returnContainer = "Map";
}
} else if (!languageSpecificPrimitives.contains(operation.returnType)) {
// add super:: to model, e.g. super::pet
operation.vendorExtensions.put("x-returnTypeInMethod", "super::" + operation.returnType);
} else {
// primitive type or array/map of primitive type
operation.vendorExtensions.put("x-returnTypeInMethod", operation.returnType);
}
}
for (CodegenParameter p : operation.allParams) {
if (p.isArray && !languageSpecificPrimitives.contains(p.dataType)) {
// array of model
String rt = p.dataType;
int end = rt.lastIndexOf(">");
if ( end > 0 ) {
p.dataType = "Vec<" + rt.substring("Vec<".length(), end).trim() + ">";
}
} else if (p.isMap && !languageSpecificPrimitives.contains(p.dataType)) {
// map of model
String rt = p.dataType;
int end = rt.lastIndexOf(">");
if ( end > 0 ) {
p.dataType = "::std::collections::HashMap";
}
} else if (!languageSpecificPrimitives.contains(p.dataType)) {
// add super:: to model, e.g. super::pet
p.dataType = "super::" + p.dataType;
}
}*/
}
return objs;
}
@Override
public String toDefaultValue(Schema p) {
if (p.getDefault() != null) {
return p.getDefault().toString();
} else {
return null;
}
}
}
