org.tsugi.HACK.HackMoodle Maven / Gradle / Ivy
package org.tsugi.HACK;
import org.tsugi.basiclti.BasicLTIUtil;
import org.json.simple.JSONValue;
import org.json.simple.JSONObject;
import org.json.simple.JSONArray;
public class HackMoodle {
/* In the IMS Dynamic Registration spec, messages_supported is a (kind of weird) array of objects:
*
* {
* "https://purl.imsglobal.org/spec/lti-platform-configuration": {
* "product_family_code": "ExampleLMS",
* "messages_supported": [
* {"type": "LtiResourceLinkRequest"},
* {"type": "LtiDeepLinkingRequest"}],
* "variables": ["CourseSection.timeFrame.end", "CourseSection.timeFrame.begin", "Context.id.history", "ResourceLink.id.history"]
* }
*
* In Moodle (at least in 3.10) these come back as an array of strings.
*
* {
* "https://purl.imsglobal.org/spec/lti-platform-configuration": {
* "product_family_code": "moodle",
* "version": "3.10.9+ (Build: 20220129)",
* "messages_supported": [
* "LtiResourceLinkRequest",
* "LtiDeepLinkingRequest"
* ],
* "variables": ["CourseSection.timeFrame.end", "CourseSection.timeFrame.begin", "Context.id.history", "ResourceLink.id.history"]
* }
*
* Usage:
*
* body = org.tsugi.HACK.HackMoodle.hackOpenIdConfiguration(body);
* openIDConfig = mapper.readValue(body, OpenIDProviderConfiguration.class);
*/
public static String hackOpenIdConfiguration(String body)
{
JSONObject jso = BasicLTIUtil.parseJSONObject(body);
if ( jso == null ) return body;
JSONObject pc = (JSONObject) jso.get("https://purl.imsglobal.org/spec/lti-platform-configuration");
if ( pc == null ) return body;
JSONArray messages_supported = (JSONArray) pc.get("messages_supported");
JSONArray new_messages = new JSONArray();
boolean changed = false;
for (Object jo : messages_supported) {
if ( jo instanceof String ) {
JSONObject new_message = new JSONObject();
new_message.put("type", (String) jo);
new_messages.add(new_message);
changed = true;
} else {
new_messages.add(jo);
}
}
if ( ! changed ) return body;
pc.put("messages_supported", new_messages);
jso.put("https://purl.imsglobal.org/spec/lti-platform-configuration", pc);
return jso.toJSONString();
}
}