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xapiwrapper.js
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// adds toISOString to date objects if not there
// from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toISOString
if ( !Date.prototype.toISOString ) {
( function() {
function pad(number) {
var r = String(number);
if ( r.length === 1 ) {
r = '0' + r;
}
return r;
}
Date.prototype.toISOString = function() {
return this.getUTCFullYear()
+ '-' + pad( this.getUTCMonth() + 1 )
+ '-' + pad( this.getUTCDate() )
+ 'T' + pad( this.getUTCHours() )
+ ':' + pad( this.getUTCMinutes() )
+ ':' + pad( this.getUTCSeconds() )
+ '.' + String( (this.getUTCMilliseconds()/1000).toFixed(3) ).slice( 2, 5 )
+ 'Z';
};
}() );
}
// shim for old-style Base64 lib
function toBase64(text){
if(CryptoJS && CryptoJS.enc.Base64)
return CryptoJS.enc.Base64.stringify(CryptoJS.enc.Latin1.parse(text));
else
return Base64.encode(text);
}
// shim for old-style crypto lib
function toSHA1(text){
if(CryptoJS && CryptoJS.SHA1)
return CryptoJS.SHA1(text).toString();
else
return Crypto.util.bytesToHex( Crypto.SHA1(text,{asBytes:true}) );
}
function toSHA256(text){
if(CryptoJS && CryptoJS.SHA256)
return CryptoJS.SHA256(text).toString();
}
// check if string or object is date, if it is, return date object
// feburary 31st == march 3rd in this solution
function isDate(date) {
// check if object is being passed
if ( Object.prototype.toString.call(date) === "[object Date]" )
var d = date;
else
var d = new Date(date);
// deep check on date object
if ( Object.prototype.toString.call(d) === "[object Date]" )
{
// it is a date
if ( isNaN( d.valueOf() ) )
{
ADL.XAPIWrapper.log("Invalid date String passed");
return null;
} else {
return d;
}
} else {
// not a date
ADL.XAPIWrapper.log("Invalid date object");
return null;
}
}
(function (ADL) {
log.debug = false;
function getByteLen(normal_val) {
// Force string type
normal_val = String(normal_val);
var byteLen = 0;
for (var i = 0; i < normal_val.length; i++) {
var c = normal_val.charCodeAt(i);
byteLen += c < (1 << 7) ? 1 :
c < (1 << 11) ? 2 :
c < (1 << 16) ? 3 :
c < (1 << 21) ? 4 :
c < (1 << 26) ? 5 :
c < (1 << 31) ? 6 : Number.NaN;
}
return byteLen;
}
/*
* Config object used w/ url params to configure the lrs object
* change these to match your lrs
* @return {object} config object
* @example
* var conf = {
* "endpoint" : "https://lrs.adlnet.gov/xapi/",
* "auth" : "Basic " + toBase64('tom:1234'),
* };
* ADL.XAPIWrapper.changeConfig(conf);
*/
var Config = function()
{
var conf = {};
conf['endpoint'] = "http://localhost:8000/xapi/";
//try
//{
conf['auth'] = "Basic " + toBase64('tom:1234');
//}
//catch (e)
//{
// log("Exception in Config trying to encode auth: " + e);
//}
// Statement defaults
// conf["actor"] = {"mbox":"[email protected]"};
// conf["registration"] = ruuid();
// conf["grouping"] = {"id":"ctxact:default/grouping"};
// conf["activity_platform"] = "default platform";
// Behavior defaults
// conf["strictCallbacks"] = false; // Strict error-first callbacks
return conf
}();
/*
* XAPIWrapper Constructor
* @param {object} config with a minimum of an endoint property
* @param {boolean} verifyxapiversion indicating whether to verify the version of the LRS is compatible with this wrapper
*/
XAPIWrapper = function(config, verifyxapiversion)
{
this.lrs = getLRSObject(config || {});
if (this.lrs.user && this.lrs.password)
updateAuth(this.lrs, this.lrs.user, this.lrs.password);
this.base = getbase(this.lrs.endpoint);
this.withCredentials = false;
this.withCredentials = config && config.withCredentials;
// Ensure that callbacks are always executed, first param is error (null if no error) followed
// by the result(s)
this.strictCallbacks = false;
this.strictCallbacks = config && config.strictCallbacks;
function getbase(url)
{
var l = document.createElement("a");
l.href = url;
if (l.protocol && l.host)
return l.protocol + "//" + l.host;
else
ADL.XAPIWrapper.log("Couldn't create base url from endpoint: " + this.lrs.endpoint);
}
function updateAuth(obj, username, password){
obj.auth = "Basic " + toBase64(username + ":" + password);
}
if (verifyxapiversion && testConfig.call(this))
{
window.ADL.XHR_request(this.lrs, this.lrs.endpoint+"about", "GET", null, null,
function(r){
if(r.status == 200)
{
try
{
var lrsabout = JSON.parse(r.response);
var versionOK = false;
for (var idx in lrsabout.version)
{
if (lrsabout.version.hasOwnProperty(idx))
if(lrsabout.version[idx] == ADL.XAPIWrapper.xapiVersion)
{
versionOK = true;
break;
}
}
if (!versionOK)
{
ADL.XAPIWrapper.log("The lrs version [" + lrsabout.version +"]"+
" does not match this wrapper's XAPI version [" + ADL.XAPIWrapper.xapiVersion + "]");
}
}
catch(e)
{
ADL.XAPIWrapper.log("The response was not an about object")
}
}
else
{
ADL.XAPIWrapper.log("The request to get information about the LRS failed: " + r);
}
}, null, false, null, this.withCredentials, false);
}
this.searchParams = function(){
var sp = {"format" : "exact"};
return sp;
};
this.hash = function(tohash){
if (!tohash) return null;
try
{
return toSHA1(tohash);
}
catch(e)
{
ADL.XAPIWrapper.log("Error trying to hash -- " + e);
return null;
}
};
this.changeConfig = function(config){
try
{
ADL.XAPIWrapper.log("updating lrs object with new configuration");
this.lrs = mergeRecursive(this.lrs, config);
if (config.user && config.password)
this.updateAuth(this.lrs, config.user, config.password);
this.base = getbase(this.lrs.endpoint);
this.withCredentials = config.withCredentials;
this.strictCallbacks = config.strictCallbacks;
}
catch(e)
{
ADL.XAPIWrapper.log("error while changing configuration -- " + e);
}
};
this.updateAuth = updateAuth;
};
// This wrapper is based on the Experience API Spec version:
XAPIWrapper.prototype.xapiVersion = "1.0.1";
/*
* Adds info from the lrs object to the statement, if available.
* These values could be initialized from the Config object or from the url query string.
* @param {object} stmt the statement object
*/
XAPIWrapper.prototype.prepareStatement = function(stmt)
{
if(stmt.actor === undefined){
stmt.actor = JSON.parse(this.lrs.actor);
}
else if(typeof stmt.actor === "string") {
stmt.actor = JSON.parse(stmt.actor);
}
if (this.lrs.grouping ||
this.lrs.registration ||
this.lrs.activity_platform) {
if (!stmt.context) {
stmt.context = {};
}
}
if (this.lrs.grouping) {
if (!stmt.context.contextActivities) {
stmt.context.contextActivities = {};
}
stmt.context.contextActivities.grouping = [{ id : this.lrs.grouping }];
}
if (this.lrs.registration) {
stmt.context.registration = this.lrs.registration;
}
if (this.lrs.activity_platform) {
stmt.context.platform = this.lrs.activity_platform;
}
};
// tests the configuration of the lrs object
XAPIWrapper.prototype.testConfig = testConfig;
// writes to the console if available
XAPIWrapper.prototype.log = log;
/*
* Send a single statement to the LRS. Makes a Javascript object
* with the statement id as 'id' available to the callback function.
* @param {object} stmt statement object to send
* @param {function} [callback] function to be called after the LRS responds
* to this request (makes the call asynchronous)
* the function will be passed the XMLHttpRequest object
* and an object with an id property assigned the id
* of the statement
* @return {object} object containing xhr object and id of statement
* @example
* // Send Statement
* var stmt = {"actor" : {"mbox" : "mailto:[email protected]"},
* "verb" : {"id" : "http://adlnet.gov/expapi/verbs/answered",
* "display" : {"en-US" : "answered"}},
* "object" : {"id" : "http://adlnet.gov/expapi/activities/question"}};
* var resp_obj = ADL.XAPIWrapper.sendStatement(stmt);
* ADL.XAPIWrapper.log("[" + resp_obj.id + "]: " + resp_obj.xhr.status + " - " + resp_obj.xhr.statusText);
* >> [3e616d1c-5394-42dc-a3aa-29414f8f0dfe]: 204 - NO CONTENT
*
* // Send Statement with Callback
* var stmt = {"actor" : {"mbox" : "mailto:[email protected]"},
* "verb" : {"id" : "http://adlnet.gov/expapi/verbs/answered",
* "display" : {"en-US" : "answered"}},
* "object" : {"id" : "http://adlnet.gov/expapi/activities/question"}};
* ADL.XAPIWrapper.sendStatement(stmt, function(resp, obj){
* ADL.XAPIWrapper.log("[" + obj.id + "]: " + resp.status + " - " + resp.statusText);});
* >> [4edfe763-8b84-41f1-a355-78b7601a6fe8]: 204 - NO CONTENT
*/
XAPIWrapper.prototype.sendStatement = function(stmt, callback, attachments)
{
if (this.testConfig())
{
this.prepareStatement(stmt);
var id;
if (stmt['id'])
{
id = stmt['id'];
}
else
{
id = ADL.ruuid();
stmt['id'] = id;
}
var payload = JSON.stringify(stmt);
var extraHeaders = null;
if(attachments && attachments.length > 0)
{
extraHeaders = {}
payload = this.buildMultipartPost(stmt,attachments,extraHeaders)
}
var resp = ADL.XHR_request(this.lrs, this.lrs.endpoint+"statements",
"POST", payload, this.lrs.auth, callback, {"id":id}, null, extraHeaders,
this.withCredentials, this.strictCallbacks);
if (!callback)
return {"xhr":resp,
"id" :id};
}
};
/*
* Build the post body to include the multipart boundries, edit the statement to include the attachment types
* extraHeaders should be an object. It will have the multipart boundary value set
* attachments should be an array of objects of the type
* {
type:"signature" || {
usageType : URI,
display: Language-map
description: Language-map
},
value : a UTF8 string containing the binary data of the attachment. For string values, this can just be the JS string.
}
*/
XAPIWrapper.prototype.buildMultipartPost = function(statement,attachments,extraHeaders)
{
statement.attachments = [];
for(var i =0; i < attachments.length; i++)
{
//replace the term 'signature' with the hard coded definition for a signature attachment
if(attachments[i].type == "signature")
{
attachments[i].type = {
"usageType": "http://adlnet.gov/expapi/attachments/signature",
"display": {
"en-US": "A JWT signature"
},
"description": {
"en-US": "A signature proving the statement was not modified"
},
"contentType": "application/octet-stream"
}
}
//compute the length and the sha2 of the attachment
attachments[i].type.length = attachments[i].value.length;
attachments[i].type.sha2 = toSHA256(attachments[i].value);
//attach the attachment metadata to the statement
statement.attachments.push(attachments[i].type)
}
var body = "";
var CRLF = "\r\n";
var boundary = (Math.random()+' ').substring(2,10)+(Math.random()+' ').substring(2,10);
extraHeaders["Content-Type"] = "multipart/mixed; boundary=" + boundary;
body += CRLF + '--' + boundary + CRLF + 'Content-Type:application/json' + CRLF + "Content-Disposition: form-data; name=\"statement\"" + CRLF + CRLF;
body += JSON.stringify(statement);
for(var i in attachments)
{
if (attachments.hasOwnProperty(i))
{
body += CRLF + '--' + boundary + CRLF + 'X-Experience-API-Hash:' + attachments[i].type.sha2 + CRLF + "Content-Type:" + attachments[i].type.contentType + CRLF + "Content-Transfer-Encoding: binary" + CRLF + CRLF
body += attachments[i].value;
}
}
body += CRLF + "--" + boundary + "--" + CRLF
return body;
}
/*
* Send a list of statements to the LRS.
* @param {array} stmtArray the list of statement objects to send
* @param {function} [callback] function to be called after the LRS responds
* to this request (makes the call asynchronous)
* the function will be passed the XMLHttpRequest object
* @return {object} xhr response object
* @example
* var stmt = {"actor" : {"mbox" : "mailto:[email protected]"},
* "verb" : {"id" : "http://adlnet.gov/expapi/verbs/answered",
* "display" : {"en-US" : "answered"}},
* "object" : {"id" : "http://adlnet.gov/expapi/activities/question"}};
* var resp_obj = ADL.XAPIWrapper.sendStatement(stmt);
* ADL.XAPIWrapper.getStatements({"statementId":resp_obj.id});
* >> {"version": "1.0.0",
* "timestamp": "2013-09-09 21:36:40.185841+00:00",
* "object": {"id": "http://adlnet.gov/expapi/activities/question", "objectType": "Activity"},
* "actor": {"mbox": "mailto:[email protected]", "name": "tom creighton", "objectType": "Agent"},
* "stored": "2013-09-09 21:36:40.186124+00:00",
* "verb": {"id": "http://adlnet.gov/expapi/verbs/answered", "display": {"en-US": "answered"}},
* "authority": {"mbox": "mailto:[email protected]", "name": "tom", "objectType": "Agent"},
* "context": {"registration": "51a6f860-1997-11e3-8ffd-0800200c9a66"},
* "id": "ea9c1d01-0606-4ec7-8e5d-20f87b1211ed"}
*/
XAPIWrapper.prototype.sendStatements = function(stmtArray, callback)
{
if (this.testConfig())
{
for(var i in stmtArray)
{
if (stmtArray.hasOwnProperty(i))
this.prepareStatement(stmtArray[i]);
}
var resp = ADL.XHR_request(this.lrs,this.lrs.endpoint+"statements",
"POST", JSON.stringify(stmtArray), this.lrs.auth, callback, null,
false, null, this.withCredentials, this.strictCallbacks);
if (!callback)
{
return resp;
}
}
};
/*
* Get statement(s) based on the searchparams or more url.
* @param {object} searchparams an ADL.XAPIWrapper.searchParams object of
* key(search parameter)-value(parameter value) pairs.
* Example:
* var myparams = ADL.XAPIWrapper.searchParams();
* myparams['verb'] = ADL.verbs.completed.id;
* var completedStmts = ADL.XAPIWrapper.getStatements(myparams);
* @param {string} more the more url found in the StatementResults object, if there are more
* statements available based on your get statements request. Pass the
* more url as this parameter to retrieve those statements.
* @param {function} [callback] - function to be called after the LRS responds
* to this request (makes the call asynchronous)
* the function will be passed the XMLHttpRequest object
* @return {object} xhr response object or null if 404
* @example
* var ret = ADL.XAPIWrapper.getStatements();
* if (ret)
* ADL.XAPIWrapper.log(ret.statements);
*
* >> <Array of statements>
*/
XAPIWrapper.prototype.getStatements = function(searchparams, more, callback)
{
if (this.testConfig())
{
var url = this.lrs.endpoint + "statements";
if (more)
{
url = this.base + more;
}
else
{
var urlparams = new Array();
for (s in searchparams)
{
if (searchparams.hasOwnProperty(s))
{
if (s == "until" || s == "since") {
var d = new Date(searchparams[s]);
urlparams.push(s + "=" + encodeURIComponent(d.toISOString()));
} else {
urlparams.push(s + "=" + encodeURIComponent(searchparams[s]));
}
}
}
if (urlparams.length > 0)
url = url + "?" + urlparams.join("&");
}
var res = ADL.XHR_request(this.lrs,url, "GET", null, this.lrs.auth,
callback, null, false, null, this.withCredentials, this.strictCallbacks);
if(res === undefined || res.status == 404)
{
return null
}
try
{
return JSON.parse(res.response);
}
catch(e)
{
return res.response;
}
}
};
/*
* Gets the Activity object from the LRS.
* @param {string} activityid the id of the Activity to get
* @param {function} [callback] function to be called after the LRS responds
* to this request (makes the call asynchronous)
* the function will be passed the XMLHttpRequest object
* @return {object} xhr response object or null if 404
* @example
* var res = ADL.XAPIWrapper.getActivities("http://adlnet.gov/expapi/activities/question");
* ADL.XAPIWrapper.log(res);
* >> <Activity object>
*/
XAPIWrapper.prototype.getActivities = function(activityid, callback)
{
if (this.testConfig())
{
var url = this.lrs.endpoint + "activities?activityId=<activityid>";
url = url.replace('<activityid>', encodeURIComponent(activityid));
var result = ADL.XHR_request(this.lrs, url, "GET", null, this.lrs.auth,
callback, null, true, null, this.withCredentials, this.strictCallbacks);
if(result === undefined || result.status == 404)
{
return null
}
try
{
return JSON.parse(result.response);
}
catch(e)
{
return result.response;
}
}
};
/*
* Store activity state in the LRS
* @param {string} activityid the id of the Activity this state is about
* @param {object} agent the agent this Activity state is related to
* @param {string} stateid the id you want associated with this state
* @param {string} [registration] the registraton id associated with this state
* @param {string} stateval the state
* @param {string} [matchHash] the hash of the state to replace or * to replace any
* @param {string} [noneMatchHash] the hash of the current state or * to indicate no previous state
* @param {function} [callback] function to be called after the LRS responds
* to this request (makes the call asynchronous)
* the function will be passed the XMLHttpRequest object
* @return {boolean} false if no activity state is included
* @example
* var stateval = {"info":"the state info"};
* ADL.XAPIWrapper.sendState("http://adlnet.gov/expapi/activities/question",
* {"mbox":"mailto:[email protected]"},
* "questionstate", null, stateval);
*/
XAPIWrapper.prototype.sendState = function(activityid, agent, stateid, registration, stateval, matchHash, noneMatchHash, callback)
{
if (this.testConfig())
{
var url = this.lrs.endpoint + "activities/state?activityId=<activity ID>&agent=<agent>&stateId=<stateid>";
url = url.replace('<activity ID>',encodeURIComponent(activityid));
url = url.replace('<agent>',encodeURIComponent(JSON.stringify(agent)));
url = url.replace('<stateid>',encodeURIComponent(stateid));
if (registration)
{
url += "®istration=" + encodeURIComponent(registration);
}
var headers = null;
if(matchHash && noneMatchHash)
{
log("Can't have both If-Match and If-None-Match");
}
else if (matchHash)
{
headers = {"If-Match":ADL.formatHash(matchHash)};
}
else if (noneMatchHash)
{
headers = {"If-None-Match":ADL.formatHash(noneMatchHash)};
}
var method = "PUT";
if (stateval)
{
if (stateval instanceof Array)
{
stateval = JSON.stringify(stateval);
headers = headers || {};
headers["Content-Type"] ="application/json";
}
else if (stateval instanceof Object)
{
stateval = JSON.stringify(stateval);
headers = headers || {};
headers["Content-Type"] ="application/json";
method = "POST";
}
else
{
headers = headers || {};
headers["Content-Type"] ="application/octet-stream";
}
}
else
{
this.log("No activity state was included.");
return false;
}
//(lrs, url, method, data, auth, callback, callbackargs, ignore404, extraHeaders)
ADL.XHR_request(this.lrs, url, method, stateval, this.lrs.auth, callback,
null, null, headers, this.withCredentials, this.strictCallbacks);
}
};
/*
* Get activity state from the LRS
* @param {string} activityid the id of the Activity this state is about
* @param {object} agent the agent this Activity state is related to
* @param {string} [stateid] the id of the state, if not included, the response will be a list of stateids
* associated with the activity and agent)
* @param {string} [registration] the registraton id associated with this state
* @param {object} [since] date object or date string telling the LRS to return objects newer than the date supplied
* @param {function} [callback] function to be called after the LRS responds
* to this request (makes the call asynchronous)
* the function will be passed the XMLHttpRequest object
* @return {object} xhr response object or null if 404
* @example
* ADL.XAPIWrapper.getState("http://adlnet.gov/expapi/activities/question",
* {"mbox":"mailto:[email protected]"}, "questionstate");
* >> {info: "the state info"}
*/
XAPIWrapper.prototype.getState = function(activityid, agent, stateid, registration, since, callback)
{
if (this.testConfig())
{
var url = this.lrs.endpoint + "activities/state?activityId=<activity ID>&agent=<agent>";
url = url.replace('<activity ID>',encodeURIComponent(activityid));
url = url.replace('<agent>',encodeURIComponent(JSON.stringify(agent)));
if (stateid)
{
url += "&stateId=" + encodeURIComponent(stateid);
}
if (registration)
{
url += "®istration=" + encodeURIComponent(registration);
}
if(since)
{
since = isDate(since);
if (since != null) {
url += '&since=' + encodeURIComponent(since.toISOString());
}
}
var result = ADL.XHR_request(this.lrs, url, "GET", null, this.lrs.auth,
callback, null, true, null, this.withCredentials, this.strictCallbacks);
if(result === undefined || result.status == 404)
{
return null
}
try
{
return JSON.parse(result.response);
}
catch(e)
{
return result.response;
}
}
};
/*
* Delete activity state in the LRS
* @param {string} activityid the id of the Activity this state is about
* @param {object} agent the agent this Activity state is related to
* @param {string} stateid the id you want associated with this state
* @param {string} [registration] the registraton id associated with this state
* @param {string} [matchHash] the hash of the state to replace or * to replace any
* @param {string} [noneMatchHash] the hash of the current state or * to indicate no previous state
* @param {string} [callback] function to be called after the LRS responds
* to this request (makes the call asynchronous)
* the function will be passed the XMLHttpRequest object
* @return {object} xhr response object or null if 404
* @example
* var stateval = {"info":"the state info"};
* ADL.XAPIWrapper.sendState("http://adlnet.gov/expapi/activities/question",
* {"mbox":"mailto:[email protected]"},
* "questionstate", null, stateval);
* ADL.XAPIWrapper.getState("http://adlnet.gov/expapi/activities/question",
* {"mbox":"mailto:[email protected]"}, "questionstate");
* >> {info: "the state info"}
*
* ADL.XAPIWrapper.deleteState("http://adlnet.gov/expapi/activities/question",
* {"mbox":"mailto:[email protected]"}, "questionstate");
* >> XMLHttpRequest {statusText: "NO CONTENT", status: 204, response: "", responseType: "", responseXML: null…}
*
* ADL.XAPIWrapper.getState("http://adlnet.gov/expapi/activities/question",
* {"mbox":"mailto:[email protected]"}, "questionstate");
* >> 404
*/
XAPIWrapper.prototype.deleteState = function(activityid, agent, stateid, registration, matchHash, noneMatchHash, callback)
{
if (this.testConfig())
{
var url = this.lrs.endpoint + "activities/state?activityId=<activity ID>&agent=<agent>&stateId=<stateid>";
url = url.replace('<activity ID>',encodeURIComponent(activityid));
url = url.replace('<agent>',encodeURIComponent(JSON.stringify(agent)));
url = url.replace('<stateid>',encodeURIComponent(stateid));
if (registration)
{
url += "®istration=" + encodeURIComponent(registration);
}
var headers = null;
if(matchHash && noneMatchHash)
{
log("Can't have both If-Match and If-None-Match");
}
else if (matchHash)
{
headers = {"If-Match":ADL.formatHash(matchHash)};
}
else if (noneMatchHash)
{
headers = {"If-None-Match":ADL.formatHash(noneMatchHash)};
}
var result = ADL.XHR_request(this.lrs, url, "DELETE", null, this.lrs.auth,
callback, null, false, headers, this.withCredentials, this.strictCallbacks);
if(result === undefined || result.status == 404)
{
return null
}
try
{
return JSON.parse(result.response);
}
catch(e)
{
return result;
}
}
};
/*
* Store activity profile in the LRS
* @param {string} activityid the id of the Activity this profile is about
* @param {string} profileid the id you want associated with this profile
* @param {string} profileval the profile
* @param {string} [matchHash] the hash of the profile to replace or * to replace any
* @param {string} [noneMatchHash] the hash of the current profile or * to indicate no previous profile
* @param {string} [callback] function to be called after the LRS responds
* to this request (makes the call asynchronous)
* the function will be passed the XMLHttpRequest object
* @return {bolean} false if no activity profile is included
* @example
* var profile = {"info":"the profile"};
* ADL.XAPIWrapper.sendActivityProfile("http://adlnet.gov/expapi/activities/question",
* "actprofile", profile, null, "*");
*/
XAPIWrapper.prototype.sendActivityProfile = function(activityid, profileid, profileval, matchHash, noneMatchHash, callback)
{
if (this.testConfig())
{
var url = this.lrs.endpoint + "activities/profile?activityId=<activity ID>&profileId=<profileid>";
url = url.replace('<activity ID>',encodeURIComponent(activityid));
url = url.replace('<profileid>',encodeURIComponent(profileid));
var headers = null;
if(matchHash && noneMatchHash)
{
log("Can't have both If-Match and If-None-Match");
}
else if (matchHash)
{
headers = {"If-Match":ADL.formatHash(matchHash)};
}
else if (noneMatchHash)
{
headers = {"If-None-Match":ADL.formatHash(noneMatchHash)};
}
var method = "PUT";
if (profileval)
{
if (profileval instanceof Array)
{
profileval = JSON.stringify(profileval);
headers = headers || {};
headers["Content-Type"] ="application/json";
}
else if (profileval instanceof Object)
{
profileval = JSON.stringify(profileval);
headers = headers || {};
headers["Content-Type"] ="application/json";
method = "POST";
}
else
{
headers = headers || {};
headers["Content-Type"] ="application/octet-stream";
}
}
else
{
this.log("No activity profile was included.");
return false;
}
ADL.XHR_request(this.lrs, url, method, profileval, this.lrs.auth, callback,
null, false, headers, this.withCredentials, this.strictCallbacks);
}
};
/*
* Get activity profile from the LRS
* @param {string} activityid the id of the Activity this profile is about
* @param {string} [profileid] the id of the profile, if not included, the response will be a list of profileids
* associated with the activity
* @param {object} [since] date object or date string telling the LRS to return objects newer than the date supplied
* @param {function [callback] function to be called after the LRS responds
* to this request (makes the call asynchronous)
* the function will be passed the XMLHttpRequest object
* @return {object} xhr response object or null if 404
* @example
* ADL.XAPIWrapper.getActivityProfile("http://adlnet.gov/expapi/activities/question",
* "actprofile", null,
* function(r){ADL.XAPIWrapper.log(JSON.parse(r.response));});
* >> {info: "the profile"}
*/
XAPIWrapper.prototype.getActivityProfile = function(activityid, profileid, since, callback)
{
if (this.testConfig())
{
var url = this.lrs.endpoint + "activities/profile?activityId=<activity ID>";
url = url.replace('<activity ID>',encodeURIComponent(activityid));
if (profileid)
{
url += "&profileId=" + encodeURIComponent(profileid);
}
if(since)
{
since = isDate(since);
if (since != null) {
url += '&since=' + encodeURIComponent(since.toISOString());
}
}
var result = ADL.XHR_request(this.lrs, url, "GET", null, this.lrs.auth,
callback, null, true, null, this.withCredentials, this.strictCallbacks);
if(result === undefined || result.status == 404)
{
return null
}
try
{
return JSON.parse(result.response);
}
catch(e)
{
return result.response;
}
}
};
/*
* Delete activity profile in the LRS
* @param {string} activityid the id of the Activity this profile is about
* @param {string} profileid the id you want associated with this profile
* @param {string} [matchHash] the hash of the profile to replace or * to replace any
* @param {string} [noneMatchHash] the hash of the current profile or * to indicate no previous profile
* @param {string} [callback] function to be called after the LRS responds
* to this request (makes the call asynchronous)
* the function will be passed the XMLHttpRequest object
* @return {object} xhr response object or null if 404
* @example
* ADL.XAPIWrapper.deleteActivityProfile("http://adlnet.gov/expapi/activities/question",
* "actprofile");
* >> XMLHttpRequest {statusText: "NO CONTENT", status: 204, response: "", responseType: "", responseXML: null…}
*/
XAPIWrapper.prototype.deleteActivityProfile = function(activityid, profileid, matchHash, noneMatchHash, callback)
{
if (this.testConfig())
{
var url = this.lrs.endpoint + "activities/profile?activityId=<activity ID>&profileId=<profileid>";
url = url.replace('<activity ID>',encodeURIComponent(activityid));
url = url.replace('<profileid>',encodeURIComponent(profileid));
var headers = null;
if(matchHash && noneMatchHash)
{
log("Can't have both If-Match and If-None-Match");
}
else if (matchHash)
{
headers = {"If-Match":ADL.formatHash(matchHash)};
}
else if (noneMatchHash)
{
headers = {"If-None-Match":ADL.formatHash(noneMatchHash)};
}
var result = ADL.XHR_request(this.lrs, url, "DELETE", null, this.lrs.auth,
callback, null, false, headers,this.withCredentials, this.strictCallbacks);
if(result === undefined || result.status == 404)
{
return null
}
try
{
return JSON.parse(result.response);
}
catch(e)
{
return result;
}
}
};
/*
* Gets the Person object from the LRS based on an agent object.
* The Person object may contain more information about an agent.
* See the xAPI Spec for details.
* @param {object} agent the agent object to get a Person
* @param {function [callback] function to be called after the LRS responds
* to this request (makes the call asynchronous)
* the function will be passed the XMLHttpRequest object
* @return {object} xhr response object or null if 404
* @example
* var res = ADL.XAPIWrapper.getAgents({"mbox":"mailto:[email protected]"});
* ADL.XAPIWrapper.log(res);
* >> <Person object>
*/
XAPIWrapper.prototype.getAgents = function(agent, callback)
{
if (this.testConfig())
{
var url = this.lrs.endpoint + "agents?agent=<agent>";
url = url.replace('<agent>', encodeURIComponent(JSON.stringify(agent)));
var result = ADL.XHR_request(this.lrs, url, "GET", null, this.lrs.auth,
callback, null, true, null, this.withCredentials, this.strictCallbacks);
if(result === undefined || result.status == 404)
{
return null