getStatement(statement.id, function(err, retrievedStatement) {
if (retrievedStatement) {
log.warn({id: statement.id}, 'Attempted to save a learning activity statement that already exists');
return callback({code: 400, msg: 'Attempted to save a learning activity statement that already exists'});
} else if (err && err.code !== 404) {
log.error({id: statement.id}, 'Unable to verify if learning activity statement already exists');
return callback(err);
}
// Validate the xAPI statement
xapiValidator.validate(statement, function(err) {
if (err) {
log.warn({err: err}, 'Invalid learning activity statement');
return callback({code: 500, msg: err});
}
// When no uuid has been included, generate one
statement.id = statement.id || uuid.v4();
var currentTimestamp = new Date().toISOString();
// When no timestamp has been included, generate one
statement.timestamp = statement.timestamp || currentTimestamp;
// Add the stored timestamp
statement.stored = currentTimestamp;
// Set statement type and version. Currently all XAPI feeds are coming from in house apps running 1.0.2 version.
// TODO: For future integrations these variables can be derived to accomodate different versions. Currently, setting it to default.
var statementType = XAPI;
var statementVersion = XAPI_VERSION;
var voided = false;
// Get the learning activity statement that's referenced in the current
// learning activity statement, if any
getStatementRef(statement, function(err, refStatement) {
if (err) {
log.error({err: err}, 'An error occured while getting the referenced learning activity statement');
return callback(err);
}
// Create the activity type summary (verb_objecttype)
var activityType = statement.verb.id.split('/').pop();
if (statement.object && statement.object.definition && statement.object.definition.type) {
activityType += '_' + statement.object.definition.type.split('/').pop();
} else if (refStatement && refStatement.object && refStatement.object.definition && refStatement.object.definition.type) {
activityType += '_' + refStatement.object.definition.type.split('/').pop();
}
activityType = activityType.toLowerCase();
// Get the user associated to this learning activity. If the user
// doesn't exist yet, it will be created
getOrCreateUser(ctx, statement, function(err, user) {
if (err) {
log.error({err: err}, 'An error occured while getting the learning activity statement actor');
return callback(err);
}
var actorType = null;
if (user) {
actorType = 'Person';
}
// Store the learning activity statement in the DB
var storedStatement = {
uuid: statement.id,
statement: statement,
verb: statement.verb.id,
timestamp: statement.timestamp,
activity_type: activityType,
voided: voided,
tenant_id: ctx.auth.tenant_id,
user_id: user.id,
actor_type: actorType,
statement_type: statementType,
statement_version: statementVersion,
credential_id: ctx.auth.id
};
DB.Statement.create(storedStatement).complete(function(err, statement) {
if (err) {
log.error({err: err}, 'Failed to store a new learning activity statement');
return callback({code: 500, msg: err.message});
}
log.debug({statement: statement}, 'Sucessfully stored learning activity statement');
return callback(null, statement);
});
});
});
});
});
getStatement(statement.id, function(err, retrievedStatement) {
if (retrievedStatement) {
log.warn({'id': statement.id}, 'Attempted to save a learning activity statement that already exists');
return callback({'code': 400, 'msg': 'Attempted to save a learning activity statement that already exists'});
} else if (err && err.code !== 404) {
log.error({'id': statement.id}, 'Unable to verify if learning activity statement already exists');
return callback(err);
}
// Validate the statement
xapiValidator.validate(statement, function(err) {
if (err) {
log.warn({'err': err}, 'Invalid learning activity statement');
return callback({'code': 500, 'msg': err});
}
// When no uuid has been included, generate one
statement.id = statement.id || uuid.v4();
var currentTimestamp = new Date().toISOString();
// When no timestamp has been included, generate one
statement.timestamp = statement.timestamp || currentTimestamp;
// Add the stored timestamp
statement.stored = currentTimestamp;
// Get the learning activity statement that's referenced in the current
// learning activity statement, if any
getStatementRef(statement, function(err, refStatement) {
if (err) {
log.error({'err': err}, 'An error occured while getting the referenced learning activity statement');
return callback(err);
}
// Create the activity type summary (verb_objecttype)
var activityType = statement.verb.id.split('/').pop();
if (statement.object && statement.object.definition && statement.object.definition.type) {
activityType += '_' + statement.object.definition.type.split('/').pop();
} else if (refStatement && refStatement.object && refStatement.object.definition && refStatement.object.definition.type) {
activityType += '_' + refStatement.object.definition.type.split('/').pop();
}
activityType = activityType.toLowerCase();
// Get the user associated to this learning activity. If the user
// doesn't exist yet, it will be created
getOrCreateUser(ctx, statement, function(err, user) {
if (err) {
log.error({'err': err}, 'An error occured while getting the learning activity statement actor');
return callback(err);
}
// Store the learning activity statement in the DB
var storedStatement = {
'uuid': statement.id,
'statement': statement,
'verb': statement.verb.id,
'timestamp': statement.timestamp,
'activity_type': activityType,
'voided': false,
'tenant_id': ctx.auth.tenant_id,
'user_id': user.id,
'write_credential_id': ctx.auth.id
};
DB.Statement.create(storedStatement).complete(function(err, statement) {
if (err) {
log.error({'err': err}, 'Failed to store a new learning activity statement');
return callback({'code': 500, 'msg': err.message});
}
log.debug({'statement': statement}, 'Sucessfully stored learning activity statement');
return callback();
});
});
});
});
})