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/*
* Copyright 2018 Google
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_CORE_QUERY_H_
#define FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_CORE_QUERY_H_
#include <memory>
#include <utility>
#include <vector>
#include "Firestore/core/src/firebase/firestore/core/filter.h"
#include "Firestore/core/src/firebase/firestore/model/document.h"
#include "Firestore/core/src/firebase/firestore/model/resource_path.h"
namespace firebase {
namespace firestore {
namespace core {
/**
* Represents the internal structure of a Firestore Query. Query instances are
* immutable.
*/
class Query {
public:
/**
* Creates and returns a new Query.
*
* @param path The path to the collection to be queried over.
* @return A new instance of Query.
*/
static Query AtPath(model::ResourcePath path) {
return Query(std::move(path), {});
}
/** Initializes a query with all of its components directly. */
Query(model::ResourcePath path,
std::vector<std::shared_ptr<core::Filter>>
filters /* TODO(rsgowman): other params */)
: path_(std::move(path)), filters_(std::move(filters)) {
}
/** The base path of the query. */
const model::ResourcePath& path() const {
return path_;
}
/** Returns true if the document matches the constraints of this query. */
bool Matches(const model::Document& doc) const;
/**
* Returns a copy of this Query object with the additional specified filter.
*/
Query Filter(std::shared_ptr<core::Filter> filter) const;
private:
bool MatchesPath(const model::Document& doc) const;
bool MatchesFilters(const model::Document& doc) const;
bool MatchesOrderBy(const model::Document& doc) const;
bool MatchesBounds(const model::Document& doc) const;
const model::ResourcePath path_;
// Filters are shared across related Query instance. i.e. when you call
// Query::Filter(f), a new Query instance is created that contains all of the
// existing filters, plus the new one. (Both Query and Filter objects are
// immutable.) Filters are not shared across unrelated Query instances.
const std::vector<std::shared_ptr<core::Filter>> filters_;
};
} // namespace core
} // namespace firestore
} // namespace firebase
#endif // FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_CORE_QUERY_H_
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