/*
* Copyright 2015 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
*
* http://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.kie.server.remote.rest.jbpm.ui;
import static org.kie.server.api.rest.RestURI.CONTAINER_ID;
import static org.kie.server.api.rest.RestURI.FORM_URI;
import static org.kie.server.api.rest.RestURI.PROCESS_FORM_GET_URI;
import static org.kie.server.api.rest.RestURI.PROCESS_ID;
import static org.kie.server.api.rest.RestURI.TASK_FORM_GET_URI;
import static org.kie.server.api.rest.RestURI.TASK_INSTANCE_ID;
import static org.kie.server.remote.rest.common.util.RestUtils.*;
import java.text.MessageFormat;
import javax.ws.rs.DefaultValue;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Variant;
import org.apache.commons.lang3.StringUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.json.XML;
import org.kie.server.remote.rest.common.Header;
import org.kie.server.services.api.KieServerRegistry;
import org.kie.server.services.jbpm.ui.FormServiceBase;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@Path("server/" + FORM_URI)
public class FormResource {
private static final Logger logger = LoggerFactory.getLogger(FormResource.class);
private static int PRETTY_PRINT_INDENT_FACTOR = 4;
private FormServiceBase formServiceBase;
private KieServerRegistry context;
public FormResource() {
}
public FormResource(FormServiceBase formServiceBase, KieServerRegistry context) {
this.formServiceBase = formServiceBase;
this.context = context;
}
@GET
@Path(PROCESS_FORM_GET_URI)
@Produces({MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON})
public Response getProcessForm(@javax.ws.rs.core.Context HttpHeaders headers,
@PathParam(CONTAINER_ID) String containerId, @PathParam(PROCESS_ID) String processId,
@QueryParam("lang") @DefaultValue("en") String language, @QueryParam("filter") boolean filter,
@QueryParam("type") @DefaultValue("ANY") String formType, @QueryParam("marshallContent") @DefaultValue("true") boolean marshallContent) {
Variant variant = getVariant(headers);
Header conversationIdHeader = buildConversationIdHeader(containerId, context, headers);
try {
String response = formServiceBase.getFormDisplayProcess(containerId, processId, language, filter, formType);
if ( marshallContent ) {
response = marshallFormContent( response, formType, variant);
}
logger.debug("Returning OK response with content '{}'", response);
return createResponse(response, variant, Response.Status.OK, conversationIdHeader);
} catch (IllegalStateException e) {
return notFound("Form for process id " + processId + " not found", variant, conversationIdHeader);
} catch (Exception e) {
logger.error("Unexpected error during processing {}", e.getMessage(), e);
return internalServerError(MessageFormat.format("Unexpected error encountered", e.getMessage()), variant, conversationIdHeader);
}
}
@GET
@Path(TASK_FORM_GET_URI)
@Produces({MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON})
public Response getTaskForm(@javax.ws.rs.core.Context HttpHeaders headers,
@PathParam(CONTAINER_ID) String containerId, @PathParam(TASK_INSTANCE_ID) Long taskId,
@QueryParam("lang") @DefaultValue("en") String language, @QueryParam("filter") boolean filter,
@QueryParam("type") @DefaultValue("ANY") String formType, @QueryParam("marshallContent") @DefaultValue("true") boolean marshallContent ) {
Variant variant = getVariant(headers);
Header conversationIdHeader = buildConversationIdHeader(containerId, context, headers);
try {
String response = formServiceBase.getFormDisplayTask(taskId, language, filter, formType);
if ( marshallContent ) {
response = marshallFormContent( response, formType, variant);
}
logger.debug("Returning OK response with content '{}'", response);
return createResponse(response, variant, Response.Status.OK, conversationIdHeader);
} catch (IllegalStateException e) {
return notFound("Form for task id " + taskId + " not found", variant, conversationIdHeader);
} catch (Exception e) {
logger.error("Unexpected error during processing {}", e.getMessage(), e);
return internalServerError(MessageFormat.format("Unexpected error encountered", e.getMessage()), variant, conversationIdHeader);
}
}
protected String marshallFormContent( String formContent, String formType, Variant variant ) throws Exception {
if ( StringUtils.isEmpty( formContent ) ) {
return formContent;
}
FormServiceBase.FormType actualFormType = FormServiceBase.FormType.fromName(formType);
String actualContentType = actualFormType.getContentType();
if ( actualContentType == null ) {
actualContentType = getMediaTypeForFormContent( formContent );
}
if (variant.getMediaType().equals(MediaType.APPLICATION_JSON_TYPE) && !MediaType.APPLICATION_JSON_TYPE.getSubtype().equals( actualContentType )) {
JSONObject json = XML.toJSONObject(formContent);
formatJSONResponse(json);
formContent = json.toString(PRETTY_PRINT_INDENT_FACTOR);
} else if (variant.getMediaType().equals(MediaType.APPLICATION_XML_TYPE) && !MediaType.APPLICATION_XML_TYPE.getSubtype().equals( actualContentType )) {
Object json = parseToJSON(formContent);
formContent = XML.toString(json);
}
return formContent;
}
protected String getMediaTypeForFormContent( String contentType ) {
if ( contentType != null ) {
if ( contentType.startsWith( "{" ) || contentType.startsWith( "[" ) ) {
return MediaType.APPLICATION_JSON_TYPE.getSubtype();
}
if ( contentType.startsWith( "<" ) ) {
return MediaType.APPLICATION_XML_TYPE.getSubtype();
}
}
return null;
}
private void formatJSONResponse(JSONObject json) {
try {
JSONObject form = json.getJSONObject("form");
putPropertyArrayToObject(form);
Object fields = form.get("field");
if (fields instanceof JSONArray) {
for (int i = 0; i < ((JSONArray)fields).length(); ++i) {
JSONObject field = ((JSONArray)fields).getJSONObject(i);
putPropertyArrayToObject(field);
}
} else {
putPropertyArrayToObject((JSONObject)fields);
}
} catch (JSONException e) {
logger.debug("exception while formatting :: {}", e.getMessage(), e);
}
}
private void putPropertyArrayToObject(JSONObject obj) throws JSONException {
JSONArray properties = obj.getJSONArray("property");
for (int j = 0; j<properties.length(); ++j) {
JSONObject property = properties.getJSONObject(j);
obj.put(property.getString("name"), property.get("value"));
}
obj.remove("property");
}
private Object parseToJSON(String content) throws JSONException{
try {
return new JSONArray(content);
} catch (JSONException e) {
return new JSONObject(content);
}
}
}