ErrorPtr PropertyContainer::accessProperty(PropertyAccessMode aMode, ApiValuePtr aQueryObject, ApiValuePtr aResultObject, int aDomain, PropertyDescriptorPtr aParentDescriptor)
{
ErrorPtr err;
#if DEBUGFOCUSLOGGING
FOCUSLOG("\naccessProperty: entered with query = %s\n", aQueryObject->description().c_str());
if (aParentDescriptor) {
FOCUSLOG("- parentDescriptor '%s' (%s), fieldKey=%u, objectKey=%u\n", aParentDescriptor->name(), aParentDescriptor->isStructured() ? "structured" : "scalar", aParentDescriptor->fieldKey(), aParentDescriptor->objectKey());
}
#endif
// for reading, NULL query is like query { "":NULL }
if (aQueryObject->isNull() && aMode==access_read) {
aQueryObject->setType(apivalue_object);
aQueryObject->add("", aQueryObject->newValue(apivalue_null));
}
// aApiObject must be of type apivalue_object
if (!aQueryObject->isType(apivalue_object))
return ErrorPtr(new VdcApiError(415, "Query or Value written must be object"));
if (aMode==access_read) {
if (!aResultObject)
return ErrorPtr(new VdcApiError(415, "accessing property for read must provide result object"));
aResultObject->setType(apivalue_object); // must be object
}
// Iterate trough elements of query object
aQueryObject->resetKeyIteration();
string queryName;
ApiValuePtr queryValue;
string errorMsg;
while (aQueryObject->nextKeyValue(queryName, queryValue)) {
FOCUSLOG("- starting to process query element named '%s' : %s\n", queryName.c_str(), queryValue->description().c_str());
if (aMode==access_read && queryName=="#") {
// asking for number of elements at this level -> generate and return int value
queryValue = queryValue->newValue(apivalue_int64); // integer
queryValue->setInt32Value(numProps(aDomain, aParentDescriptor));
aResultObject->add(queryName, queryValue);
}
else {
// accessing an element or series of elements at this level
bool wildcard = isMatchAll(queryName);
// - find all descriptor(s) for this queryName
PropertyDescriptorPtr propDesc;
int propIndex = 0;
bool foundone = false;
do {
propDesc = getDescriptorByName(queryName, propIndex, aDomain, aParentDescriptor);
if (propDesc) {
foundone = true; // found at least one descriptor for this query element
FOCUSLOG(" - processing descriptor '%s' (%s), fieldKey=%u, objectKey=%u\n", propDesc->name(), propDesc->isStructured() ? "structured" : "scalar", propDesc->fieldKey(), propDesc->objectKey());
// actually access by descriptor
if (propDesc->isStructured()) {
ApiValuePtr subQuery;
// property is a container. Now check the value
if (queryValue->isType(apivalue_object)) {
subQuery = queryValue; // query specifies next level, just use it
}
else if (queryName!="*" && (!wildcard || propDesc->isWildcardAddressable())) {
// don't recurse deeper when query name is "*" or property is not wildcard-adressable
// special case is "*" as leaf in query - only recurse if it is not present
// - autocreate subquery
subQuery = queryValue->newValue(apivalue_object);
subQuery->add("", queryValue->newValue(apivalue_null));
}
if (subQuery) {
// addressed property is a container by itself -> recurse
// - get the PropertyContainer
int containerDomain = aDomain; // default to same, but getContainer may modify it
PropertyDescriptorPtr containerPropDesc = propDesc;
PropertyContainerPtr container = getContainer(containerPropDesc, containerDomain);
if (container) {
FOCUSLOG(" - container for '%s' is 0x%p\n", propDesc->name(), container.get());
FOCUSLOG(" >>>> RECURSING into accessProperty()\n");
if (aMode==access_read) {
// read needs a result object
ApiValuePtr resultValue = queryValue->newValue(apivalue_object);
err = container->accessProperty(aMode, subQuery, resultValue, containerDomain, containerPropDesc);
if (Error::isOK(err)) {
// add to result with actual name (from descriptor)
FOCUSLOG("\n <<<< RETURNED from accessProperty() recursion\n");
FOCUSLOG(" - accessProperty of container for '%s' returns %s\n", propDesc->name(), resultValue->description().c_str());
aResultObject->add(propDesc->name(), resultValue);
}
}
else {
// for write, just pass the query value
err = container->accessProperty(aMode, subQuery, ApiValuePtr(), containerDomain, containerPropDesc);
FOCUSLOG(" <<<< RETURNED from accessProperty() recursion\n", propDesc->name(), container.get());
}
if ((aMode!=access_read) && Error::isOK(err)) {
// give this container a chance to post-process write access
err = writtenProperty(aMode, propDesc, aDomain, container);
}
// 404 errors are collected, but dont abort the query
if (Error::isError(err, VdcApiError::domain(), 404)) {
if (!errorMsg.empty()) errorMsg += "; ";
errorMsg += string_format("Error(s) accessing subproperties of '%s' : { %s }", queryName.c_str(), err->description().c_str());
err.reset(); // forget the error on this level
}
}
}
}
else {
// addressed (and known by descriptor!) property is a simple value field -> access it
if (aMode==access_read) {
// read access: create a new apiValue and have it filled
ApiValuePtr fieldValue = queryValue->newValue(propDesc->type()); // create a value of correct type to get filled
bool accessOk = accessField(aMode, fieldValue, propDesc); // read
// for read, not getting an OK from accessField means: property does not exist (even if known per descriptor),
// so it will not be added to the result
if (accessOk) {
// add to result with actual name (from descriptor)
aResultObject->add(propDesc->name(), fieldValue);
}
FOCUSLOG(" - accessField for '%s' returns %s\n", propDesc->name(), fieldValue->description().c_str());
}
else {
// write access: just pass the value
if (!accessField(aMode, queryValue, propDesc)) { // write
err = ErrorPtr(new VdcApiError(403,string_format("Write access to '%s' denied", propDesc->name())));
}
}
}
}
else {
// no descriptor found for this query element
// Note: this means that property is not KNOWN, which IS not the same as getting false from accessField
// (latter means that property IS known, but has no value in the context it was queried)
// HOWEVER, for the vdc API it was decided that for reading, these cases should NOT be
// distinguished for getProperty. If a property does not exist for either reason, the return tree just does
// no contain that property.
// Also note that not having a property is not the same as not having a property VALUE:
// latter case will explicitly return a NULL value
if (!wildcard && !foundone && aMode!=access_read) {
// query did address a specific property but it is unknown -> report as error (for read AND write!)
// - collect error message, but do not abort query processing
if (!errorMsg.empty()) errorMsg += "; ";
errorMsg += string_format("Unknown property '%s' -> ignored", queryName.c_str());
}
}
} while (Error::isOK(err) && propIndex!=PROPINDEX_NONE);
}
// now generate error if we have collected a non-empty error message
if (!errorMsg.empty()) {
err = ErrorPtr(new VdcApiError(404,errorMsg));
}
#if DEBUGLOGGING
if (aMode==access_read) {
FOCUSLOG("- query element named '%s' now has result object: %s\n", queryName.c_str(), aResultObject->description().c_str());
}
#endif
}
return err;
}
ErrorPtr DaliDeviceContainer::handleMethod(VdcApiRequestPtr aRequest, const string &aMethod, ApiValuePtr aParams)
{
ErrorPtr respErr;
if (aMethod=="x-p44-groupDevices") {
// create a composite device out of existing single-channel ones
ApiValuePtr components;
long long collectionID = -1;
DeviceVector groupedDevices;
respErr = checkParam(aParams, "members", components);
if (Error::isOK(respErr)) {
if (components->isType(apivalue_object)) {
components->resetKeyIteration();
string dimmerType;
ApiValuePtr o;
while (components->nextKeyValue(dimmerType, o)) {
DsUid memberUID;
memberUID.setAsBinary(o->binaryValue());
bool deviceFound = false;
// search for this device
for (DeviceVector::iterator pos = devices.begin(); pos!=devices.end(); ++pos) {
// only non-grouped DALI devices can be grouped
DaliDevicePtr dev = boost::dynamic_pointer_cast<DaliDevice>(*pos);
if (dev && dev->getDsUid() == memberUID) {
deviceFound = true;
// found this device, create DB entry for it
db.executef(
"INSERT OR REPLACE INTO compositeDevices (dimmerUID, dimmerType, collectionID) VALUES ('%s','%s',%lld)",
memberUID.getString().c_str(),
dimmerType.c_str(),
collectionID
);
if (collectionID<0) {
// use rowid of just inserted item as collectionID
collectionID = db.last_insert_rowid();
// - update already inserted first record
db.executef(
"UPDATE compositeDevices SET collectionID=%lld WHERE ROWID=%lld",
collectionID,
collectionID
);
}
// remember
groupedDevices.push_back(dev);
// done
break;
}
}
if (!deviceFound) {
respErr = ErrorPtr(new WebError(404, "some devices of the group could not be found"));
break;
}
}
if (Error::isOK(respErr) && groupedDevices.size()>0) {
// all components inserted into DB
// - remove grouped single devices
for (DeviceVector::iterator pos = groupedDevices.begin(); pos!=groupedDevices.end(); ++pos) {
(*pos)->hasVanished(false); // vanish, but keep settings
}
// - re-collect devices to find grouped composite now, but only in a second starting from main loop, not from here
CompletedCB cb = boost::bind(&DaliDeviceContainer::groupCollected, this, aRequest);
MainLoop::currentMainLoop().executeOnce(boost::bind(&DaliDeviceContainer::collectDevices, this, cb, false, false), 1*Second);
}
}
}
}
else {
respErr = inherited::handleMethod(aRequest, aMethod, aParams);
}
return respErr;
}