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A native Java library to talk to the Canvas REST API
package edu.ksu.canvas.impl;
import com.google.common.collect.ImmutableMap;
import com.google.gson.JsonObject;
import com.google.gson.reflect.TypeToken;
import edu.ksu.canvas.enums.SectionIncludes;
import edu.ksu.canvas.interfaces.SectionReader;
import edu.ksu.canvas.interfaces.SectionWriter;
import edu.ksu.canvas.model.Section;
import edu.ksu.canvas.net.Response;
import edu.ksu.canvas.net.RestClient;
import edu.ksu.canvas.oauth.OauthToken;
import org.apache.log4j.Logger;
import java.io.IOException;
import java.lang.reflect.Type;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.stream.Collectors;
public class SectionsImpl extends BaseImpl implements SectionReader,
SectionWriter {
private static final Logger LOG = Logger.getLogger(SectionReader.class);
public SectionsImpl(String canvasBaseUrl, Integer apiVersion, OauthToken oauthToken, RestClient restClient,
int connectTimeout, int readTimeout, Integer paginationPageSize, Boolean serializeNulls) {
super(canvasBaseUrl, apiVersion, oauthToken, restClient, connectTimeout, readTimeout,
paginationPageSize, serializeNulls);
}
@Override
public List listCourseSections(String courseId, List includes) throws IOException {
LOG.debug("Looking up sections for course " + courseId);
ImmutableMap> parameters = ImmutableMap.>builder()
.put("include[]", includes.stream().map(Enum::toString).collect(Collectors.toList()))
.build();
String url = buildCanvasUrl("/courses/" + courseId + "/sections", parameters);
return getListFromCanvas(url);
}
@Override
public Optional getSingleSection(String sectionId) throws IOException {
LOG.debug("getting section " + sectionId);
String url = buildCanvasUrl("sections/" + sectionId, new HashMap<>());
Response response = canvasMessenger.getSingleResponseFromCanvas(oauthToken, url);
return responseParser.parseToObject(Section.class, response);
}
@Override
protected Type listType() {
return new TypeToken>(){}.getType();
}
@Override
protected Class objectType() {
return Section.class;
}
@Override
public Optional createSection(String courseId, Section section, Boolean enableSisReactivation)
throws IOException {
LOG.debug("creating section for course " + courseId);
Map> params = new HashMap<>();
if(enableSisReactivation != null) {
params.put("enable_sis_reactivation", Arrays.asList(Boolean.toString(enableSisReactivation)));
}
String url = buildCanvasUrl(String.format("/courses/%s/sections", courseId), params);
Response response = canvasMessenger.sendJsonPostToCanvas(oauthToken, url, section.toJsonObject(serializeNulls));
return responseParser.parseToObject(Section.class, response);
}
@Override
public Optional updateSection(Section section) throws IOException {
LOG.debug("updating section " + section.getId());
String url = buildCanvasUrl("sections/" + section.getId(), Collections.emptyMap());
Response response = canvasMessenger.sendJsonPutToCanvas(oauthToken, url, section.toJsonObject(serializeNulls));
return responseParser.parseToObject(Section.class, response);
}
@Override
public Optional deleteSection(String sectionId) throws IOException {
LOG.debug("deleting section " + sectionId);
String url = buildCanvasUrl("/sections/" + sectionId, Collections.emptyMap());
Response response = canvasMessenger.deleteFromCanvas(oauthToken, url, Collections.emptyMap());
return responseParser.parseToObject(Section.class, response);
}
@Override
public Optional crosslist(String sectionId, String courseId) throws IOException {
LOG.debug("crosslisting section " + sectionId + " to course " + courseId);
String url = buildCanvasUrl("/sections/" + sectionId + "/crosslist/" + courseId, Collections.emptyMap());
Response response = canvasMessenger.sendJsonPostToCanvas(oauthToken, url, new JsonObject());
return responseParser.parseToObject(Section.class, response);
}
}