1 /*
2  * Copyright (C) 2018 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef LIBTEXTCLASSIFIER_ANNOTATOR_DATETIME_DATETIME_GROUNDER_H_
18 #define LIBTEXTCLASSIFIER_ANNOTATOR_DATETIME_DATETIME_GROUNDER_H_
19 
20 #include <vector>
21 
22 #include "annotator/datetime/datetime_generated.h"
23 #include "annotator/types.h"
24 #include "utils/base/statusor.h"
25 #include "utils/calendar/calendar.h"
26 
27 namespace libtextclassifier3 {
28 
29 // Utility class to resolve and complete an ungrounded datetime specification.
30 class DatetimeGrounder {
31  public:
32   explicit DatetimeGrounder(const CalendarLib* calendarlib);
33 
34   // Resolves ambiguities and produces concrete datetime results from an
35   // ungrounded datetime specification.
36   StatusOr<std::vector<DatetimeParseResult>> Ground(
37       const int64 reference_time_ms_utc, const std::string& reference_timezone,
38       const std::string& reference_locale,
39       const grammar::datetime::UngroundedDatetime* ungrounded_datetime) const;
40 
41   bool IsValidUngroundedDatetime(
42       const grammar::datetime::UngroundedDatetime* ungrounded_datetime) const;
43 
44  private:
45   const CalendarLib& calendarlib_;
46 };
47 
48 }  // namespace libtextclassifier3
49 
50 #endif  // LIBTEXTCLASSIFIER_ANNOTATOR_DATETIME_DATETIME_GROUNDER_H_
51