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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/client/client_deprecated.h"
#include "mongo/base/status.h"
#include "mongo/base/status_with.h"
#include "mongo/bson/util/builder.h"
#include "mongo/db/query/query_request_helper.h"
namespace mongo {
namespace client_deprecated {
namespace {
bool isComplexQueryObj(const BSONObj& obj, bool* hasDollar) {
if (obj.hasElement("query")) {
if (hasDollar)
*hasDollar = false;
return true;
}
if (obj.hasElement("$query")) {
if (hasDollar)
*hasDollar = true;
return true;
}
return false;
}
BSONObj filterFromOpQueryObj(const BSONObj& obj) {
bool hasDollar;
if (!isComplexQueryObj(obj, &hasDollar)) {
return obj;
}
return obj.getObjectField(hasDollar ? "$query" : "query");
}
void initFindFromOptions(int options, FindCommandRequest* findCommand) {
bool tailable = (options & QueryOption_CursorTailable) != 0;
bool awaitData = (options & QueryOption_AwaitData) != 0;
if (awaitData) {
findCommand->setAwaitData(true);
}
if (tailable) {
findCommand->setTailable(true);
}
if ((options & QueryOption_NoCursorTimeout) != 0) {
findCommand->setNoCursorTimeout(true);
}
if ((options & QueryOption_PartialResults) != 0) {
findCommand->setAllowPartialResults(true);
}
}
/**
* Fills out the 'findCommand' output parameter based on the contents of 'querySettings'. Here,
* 'querySettings' has the same format as the "query" field of the no-longer-supported OP_QUERY wire
* protocol message. It can look something like this for example:
*
* {$query: ..., $hint: ..., $min: ..., $max: ...}
*
* Note that this does not set the filter itself on the 'FindCommandRequest' -- this function only
* deals with options that can be packed into the filter object.
*
* Although the OP_QUERY wire protocol message is no longer ever sent over the wire by the internal
* client, this supports old callers of that still specify the operation they want to perform using
* an OP_QUERY-inspired format.
*/
Status initFindFromOpQueryObj(const BSONObj& querySettings, FindCommandRequest* findCommand) {
for (auto&& e : querySettings) {
StringData name = e.fieldNameStringData();
if (name == "$orderby" || name == "orderby") {
if (Object == e.type()) {
findCommand->setSort(e.embeddedObject().getOwned());
} else if (Array == e.type()) {
findCommand->setSort(e.embeddedObject());
// TODO: Is this ever used? I don't think so.
// Quote:
// This is for languages whose "objects" are not well ordered (JSON is well
// ordered).
// [ { a : ... } , { b : ... } ] -> { a : ..., b : ... }
// note: this is slow, but that is ok as order will have very few pieces
BSONObjBuilder b;
char p[2] = "0";
while (1) {
BSONObj j = findCommand->getSort().getObjectField(p);
if (j.isEmpty()) {
break;
}
BSONElement e = j.firstElement();
if (e.eoo()) {
return Status(ErrorCodes::BadValue, "bad order array");
}
if (!e.isNumber()) {
return Status(ErrorCodes::BadValue, "bad order array [2]");
}
b.append(e);
(*p)++;
if (!(*p <= '9')) {
return Status(ErrorCodes::BadValue, "too many ordering elements");
}
}
findCommand->setSort(b.obj());
} else {
return Status(ErrorCodes::BadValue, "sort must be object or array");
}
} else if (name == "term") {
findCommand->setTerm(e.safeNumberLong());
} else if (name == "readConcern") {
if (e.type() != BSONType::Object) {
return Status(ErrorCodes::BadValue, "readConcern must be an object");
}
findCommand->setReadConcern(e.embeddedObject().getOwned());
} else if (name.startsWith("$")) {
name = name.substr(1); // chop first char
if (name == "min") {
if (!e.isABSONObj()) {
return Status(ErrorCodes::BadValue, "$min must be a BSONObj");
}
findCommand->setMin(e.embeddedObject().getOwned());
} else if (name == "max") {
if (!e.isABSONObj()) {
return Status(ErrorCodes::BadValue, "$max must be a BSONObj");
}
findCommand->setMax(e.embeddedObject().getOwned());
} else if (name == "hint") {
if (e.isABSONObj()) {
findCommand->setHint(e.embeddedObject().getOwned());
} else if (String == e.type()) {
findCommand->setHint(e.wrap());
} else {
return Status(ErrorCodes::BadValue,
"$hint must be either a string or nested object");
}
} else if (name == "returnKey") {
// Won't throw.
if (e.trueValue()) {
findCommand->setReturnKey(true);
}
} else if (name == "showDiskLoc") {
// Won't throw.
if (e.trueValue()) {
findCommand->setShowRecordId(true);
query_request_helper::addShowRecordIdMetaProj(findCommand);
}
} else if (name == "maxTimeMS") {
StatusWith<int> maxTimeMS = parseMaxTimeMS(e);
if (!maxTimeMS.isOK()) {
return maxTimeMS.getStatus();
}
findCommand->setMaxTimeMS(maxTimeMS.getValue());
} else if (name == "readOnce") {
if (e.booleanSafe()) {
findCommand->setReadOnce(true);
}
} else if (name == "_requestResumeToken") {
if (e.booleanSafe()) {
findCommand->setRequestResumeToken(true);
}
} else if (name == "_resumeAfter") {
findCommand->setResumeAfter(e.embeddedObjectUserCheck().getOwned());
}
}
}
return Status::OK();
}
} // namespace
void initFindFromLegacyOptions(BSONObj bsonOptions, int options, FindCommandRequest* findCommand) {
invariant(findCommand);
BSONObj filter = filterFromOpQueryObj(bsonOptions);
if (!filter.isEmpty()) {
findCommand->setFilter(filter.getOwned());
}
uassertStatusOK(initFindFromOpQueryObj(bsonOptions, findCommand));
initFindFromOptions(options, findCommand);
}
} // namespace client_deprecated
} // namespace mongo
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