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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 com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.google.common.collect.ImmutableMap;
import com.samskivert.mustache.Mustache;
import com.samskivert.mustache.Template;
import io.swagger.v3.core.util.Json;
import io.swagger.v3.oas.models.examples.Example;
import lombok.Getter;
import lombok.Setter;
import org.openapitools.codegen.*;
import java.io.File;
import java.io.IOException;
import java.io.Writer;
import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.openapitools.codegen.meta.GeneratorMetadata;
import org.openapitools.codegen.meta.Stability;
import org.openapitools.codegen.model.ModelMap;
import org.openapitools.codegen.model.OperationMap;
import org.openapitools.codegen.model.OperationsMap;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/*
Note : This code has been MASSIVELY inspired by PostmanCollectionCodegen from @gcatanese.
Hopefully one day we can merge the similar code, as both generators stabilize
*/
public class JetbrainsHttpClientClientCodegen extends DefaultCodegen implements CodegenConfig {
private final Logger LOGGER = LoggerFactory.getLogger(JetbrainsHttpClientClientCodegen.class);
public static final String JSON_ESCAPE_NEW_LINE = "\n";
public static final String JSON_ESCAPE_DOUBLE_QUOTE = "\"";
public static final String REQUEST_PARAMETER_GENERATION_DEFAULT_VALUE = "Example";
protected String requestParameterGeneration = REQUEST_PARAMETER_GENERATION_DEFAULT_VALUE; // values: Example, Schema
public static final String PROJECT_NAME = "Jetbrains HTTP Client";
public static final String BODY_VARIABLES = "bodyVariables";
public List bodyVariables = new ArrayList<>();
public static final String CUSTOM_HEADERS = "customHeaders";
public List customHeaders = new ArrayList<>();
// A map is nice, because that way I easily override variables across APIs, for pagination for example. This should add nice defaults
private final Map customVariables = new HashMap<>();
@Override
public CodegenType getTag() {
return CodegenType.CLIENT;
}
@Override
public String getName() {
return "jetbrains-http-client";
}
@Override
public String getHelp() {
return "Generates a jetbrains-http client. See https://www.jetbrains.com/help/idea/http-client-in-product-code-editor.html";
}
@Override
public GeneratorLanguage generatorLanguage() {
return GeneratorLanguage.HTTP;
}
public JetbrainsHttpClientClientCodegen() {
super();
generatorMetadata = GeneratorMetadata.newBuilder(generatorMetadata)
.stability(Stability.EXPERIMENTAL)
.build();
outputFolder = "generated-code" + File.separator + "jetbrains-http-client";
apiTemplateFiles.put("api.mustache", ".http");
embeddedTemplateDir = templateDir = "jetbrains-http-client";
apiPackage = "Apis";
supportingFiles.add(new SupportingFile("README.mustache", "", "README.md"));
supportingFiles.add(new SupportingFile("http-client.template.env.mustache", "Apis", "http-client.template.env.json"));
cliOptions.clear();
cliOptions.add(CliOption.newString(BODY_VARIABLES, "whether to convert body placeholders (i.e. VAR_1) into variables (i.e. {{VAR_1}})"));
cliOptions.add(CliOption.newString(CUSTOM_HEADERS, "custom headers that can be set for each request. Can be used for unsupported features, for example auth methods like oauth."));
}
@Override
public void processOpts() {
super.processOpts();
var additionalProperties = additionalProperties();
if (additionalProperties.containsKey(BODY_VARIABLES)) {
bodyVariables = Arrays.asList(additionalProperties.get(BODY_VARIABLES).toString().split("-"));
}
if (additionalProperties.containsKey(CUSTOM_HEADERS)) {
customHeaders = Arrays.asList(additionalProperties.get(CUSTOM_HEADERS).toString().split("&"));
}
bodyVariables.forEach(variable -> customVariables.put(variable, ""));
for(String header: customHeaders) {
List variables = extractDoubleCurlyBraces(header);
if(!variables.isEmpty()) {
variables.forEach(v -> customVariables.put(v, ""));
}
}
}
@Override
protected ImmutableMap.Builder addMustacheLambdas() {
return super.addMustacheLambdas()
.put("doubleMustache", new DoubleMustacheLambda());
}
public static class DoubleMustacheLambda implements Mustache.Lambda {
@Override
public void execute(Template.Fragment fragment, Writer writer) throws IOException {
String text = fragment.execute();
writer.write(text
.replaceAll("\\{", "{{")
.replaceAll("}", "}}")
);
}
}
@Override
public OperationsMap postProcessOperationsWithModels(OperationsMap objs, List allModels) {
OperationsMap results = super.postProcessOperationsWithModels(objs, allModels);
OperationMap ops = results.getOperations();
List opList = ops.getOperation();
for (CodegenOperation codegenOperation : opList) {
List requests = getRequests(codegenOperation);
if (requests != null) {
codegenOperation.vendorExtensions.put("requests", requests);
//Adding to each operation for now, we may be smarter later on
codegenOperation.vendorExtensions.put("customHeaders", customHeaders);
}
}
return results;
}
@Override
public Map postProcessSupportingFileData(Map objs) {
var variables = new ArrayList<>(customVariables.keySet());
objs.put("vendorExtensionsVariables", variables);
return objs;
}
List getRequests(CodegenOperation codegenOperation) {
List items = new ArrayList<>();
if (codegenOperation.getHasBodyParam()) {
// operation with bodyParam
if (requestParameterGeneration.equalsIgnoreCase("Schema")) {
// get from schema
items.add(new RequestItem(codegenOperation.summary, getJsonFromSchema(codegenOperation.bodyParam)));
} else {
// get from examples
if (codegenOperation.bodyParam.example != null) {
// find in bodyParam example
items.add(new RequestItem(codegenOperation.summary, formatJson(codegenOperation.bodyParam.example)));
} else if (codegenOperation.bodyParam.getContent().get("application/json") != null &&
codegenOperation.bodyParam.getContent().get("application/json").getExamples() != null) {
// find in components/examples
for (Map.Entry entry : codegenOperation.bodyParam.getContent().get("application/json").getExamples().entrySet()) {
String exampleRef = entry.getValue().get$ref();
if (exampleRef != null) {
Example example = this.openAPI.getComponents().getExamples().get(extractExampleByName(exampleRef));
String exampleAsString = getJsonFromExample(example);
items.add(new RequestItem(example.getSummary(), exampleAsString));
}
}
} else if (codegenOperation.bodyParam.getSchema() != null) {
// find in schema example
String exampleAsString = (codegenOperation.bodyParam.getSchema().getExample());
items.add(new RequestItem(codegenOperation.summary, exampleAsString));
} else {
// example not found
// get from schema
items.add(new RequestItem(codegenOperation.summary, getJsonFromSchema(codegenOperation.bodyParam)));
}
}
} else {
// operation without bodyParam
items.add(new RequestItem(codegenOperation.summary, null));
}
codegenOperation.headerParams.forEach(param -> customVariables.put(param.baseName, ""));
codegenOperation.queryParams.forEach(param -> customVariables.put(param.paramName, ""));
// I also need to grab the parameters from the path
List pathVariables = extractSingleCurlyBraces(codegenOperation.path);
pathVariables.forEach(pv -> customVariables.put(pv, ""));
// Handling custom variables now
return handleCustomVariablesInRequests(items);
}
public static List extractDoubleCurlyBraces(String input) {
List result = new ArrayList<>();
Pattern pattern = Pattern.compile("\\{\\{([^}]+)\\}\\}");
Matcher matcher = pattern.matcher(input);
while (matcher.find()) {
result.add(matcher.group(1));
}
return result;
}
public static List extractSingleCurlyBraces(String input) {
List result = new ArrayList<>();
Pattern pattern = Pattern.compile("\\{([^}]+)\\}");
Matcher matcher = pattern.matcher(input);
while (matcher.find()) {
result.add(matcher.group(1));
}
return result;
}
private List handleCustomVariablesInRequests(List items) {
if (!bodyVariables.isEmpty()) {
for (var item : items) {
for (var customVariable : bodyVariables) {
var body = item.getBody();
if (body != null) {
body = body.replace(customVariable, "{{" + customVariable + "}}");
item.setBody(body);
}
}
}
}
return items;
}
@Override
public void postProcess() {
System.out.println("##########################################################################################");
System.out.println("# Thanks for using OpenAPI Generator. #");
System.out.println("# Please consider donation to help us maintain this project \uD83D\uDE4F #");
System.out.println("# https://opencollective.com/openapi_generator/donate #");
System.out.println("# #");
System.out.println("# This generator was written by Julien Lengrand-Lambert (https://github.com/jlengrand) #");
System.out.println("##########################################################################################");
}
@Getter @Setter
public class RequestItem {
private String name;
private String body;
public RequestItem(String name, String body) {
this.name = name;
this.body = body;
}
}
/*
Helpers
*/
public String getJsonFromSchema(CodegenParameter codegenParameter) {
String ret = "{" + JSON_ESCAPE_NEW_LINE + " ";
int numVars = codegenParameter.vars.size();
int counter = 1;
for (CodegenProperty codegenProperty : codegenParameter.vars) {
ret = ret + JSON_ESCAPE_DOUBLE_QUOTE + codegenProperty.baseName + JSON_ESCAPE_DOUBLE_QUOTE + ": " +
JSON_ESCAPE_DOUBLE_QUOTE + "<" + getType(codegenProperty) + ">" + JSON_ESCAPE_DOUBLE_QUOTE;
if (counter < numVars) {
// add comma unless last attribute
ret = ret + "," + JSON_ESCAPE_NEW_LINE + " ";
}
counter++;
}
ret = ret + JSON_ESCAPE_NEW_LINE + "}";
return ret;
}
public String getType(CodegenProperty codegenProperty) {
if (codegenProperty.isNumeric) {
return "number";
} else if (codegenProperty.isDate) {
return "date";
} else {
return "string";
}
}
public String formatJson(String json) {
ObjectMapper objectMapper = new ObjectMapper();
try {
// convert to JSON object and prettify
JsonNode actualObj = objectMapper.readTree(json);
json = Json.pretty(actualObj);
} catch (JsonProcessingException e) {
LOGGER.warn("Error formatting JSON", e);
json = "";
}
return json;
}
public String extractExampleByName(String ref) {
return ref.substring(ref.lastIndexOf("/") + 1);
}
public String getJsonFromExample(Example example) {
String ret = "";
if (example == null) {
return ret;
}
if (example.getValue() instanceof ObjectNode) {
ret = convertToJson((ObjectNode) example.getValue());
} else if (example.getValue() instanceof LinkedHashMap) {
ret = convertToJson((LinkedHashMap) example.getValue());
}
return ret;
}
public String convertToJson(ObjectNode objectNode) {
return formatJson(objectNode.toString());
}
public String convertToJson(LinkedHashMap linkedHashMap) {
String ret = "";
return traverseMap(linkedHashMap, ret);
}
private String traverseMap(LinkedHashMap linkedHashMap, String ret) {
ret = ret + "{" + JSON_ESCAPE_NEW_LINE + " ";
int numVars = linkedHashMap.entrySet().size();
int counter = 1;
for (Map.Entry mapElement : linkedHashMap.entrySet()) {
String key = mapElement.getKey();
Object value = mapElement.getValue();
if (value instanceof String) {
// unescape double quotes already escaped
value = ((String) value).replace("\\\"", "\"");
ret = ret + JSON_ESCAPE_DOUBLE_QUOTE + key + JSON_ESCAPE_DOUBLE_QUOTE + ": " +
JSON_ESCAPE_DOUBLE_QUOTE + value + JSON_ESCAPE_DOUBLE_QUOTE;
} else if (value instanceof Integer || value instanceof Boolean) {
ret = ret + JSON_ESCAPE_DOUBLE_QUOTE + key + JSON_ESCAPE_DOUBLE_QUOTE + ": " +
value;
} else if (value instanceof HashMap) {
String in = ret + JSON_ESCAPE_DOUBLE_QUOTE + key + JSON_ESCAPE_DOUBLE_QUOTE + ": ";
ret = traverseMap(((LinkedHashMap) value), in);
} else if (value instanceof List) {
// TODO : What if it's a list of objects? _urgh_
var items = ((List) value);
StringBuilder jsonBuilder = new StringBuilder("[");
for (int i = 0; i < items.size(); i++) {
jsonBuilder.append(JSON_ESCAPE_DOUBLE_QUOTE).append(items.get(i)).append(JSON_ESCAPE_DOUBLE_QUOTE);
if (i < items.size() - 1) {
jsonBuilder.append(",");
}
}
jsonBuilder.append("]");
ret = ret + JSON_ESCAPE_DOUBLE_QUOTE + key + JSON_ESCAPE_DOUBLE_QUOTE + ": " + jsonBuilder;
} else {
LOGGER.warn("Value type unrecognised: " + value.getClass());
//WARNING: here we are undoing what is done in "add comma unless last attribute"
// This is meant to avoid dangling commas if we encounter an unknown type
ret = ret.substring(0, ret.length() - 3);
}
if (counter < numVars) {
// add comma unless last attribute
ret = ret + "," + JSON_ESCAPE_NEW_LINE + " ";
}
counter++;
}
ret = ret + JSON_ESCAPE_NEW_LINE + "}";
return ret;
}
@Override
public String escapeUnsafeCharacters(String input) {
return input;
}
@Override
public String escapeQuotationMark(String input) {
return input;
}
}
