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87 lines
3.2 KiB
87 lines
3.2 KiB
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef LIBTEXTCLASSIFIER_ACTIONS_REGEX_ACTIONS_H_
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#define LIBTEXTCLASSIFIER_ACTIONS_REGEX_ACTIONS_H_
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#include <memory>
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#include <string>
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#include <vector>
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#include "actions/actions_model_generated.h"
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#include "actions/types.h"
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#include "utils/flatbuffers/mutable.h"
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#include "utils/utf8/unilib.h"
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#include "utils/zlib/zlib.h"
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namespace libtextclassifier3 {
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// Regular expression backed actions suggestions.
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class RegexActions {
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public:
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explicit RegexActions(const UniLib* unilib,
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const std::string& smart_reply_action_type)
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: unilib_(*unilib), smart_reply_action_type_(smart_reply_action_type) {}
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// Decompresses and initializes all rules in a model.
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bool InitializeRules(
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const RulesModel* rules, const RulesModel* low_confidence_rules,
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const TriggeringPreconditions* triggering_preconditions_overlay,
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ZlibDecompressor* decompressor);
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// Checks whether the input triggers the low confidence rules.
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bool IsLowConfidenceInput(
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const Conversation& conversation, const int num_messages,
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std::vector<const UniLib::RegexPattern*>* post_check_rules) const;
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// Checks and filters suggestions triggering the low confidence post checks.
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bool FilterConfidenceOutput(
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const std::vector<const UniLib::RegexPattern*>& post_check_rules,
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std::vector<ActionSuggestion>* actions) const;
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// Suggests actions for a conversation from a message stream using the regex
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// rules.
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bool SuggestActions(const Conversation& conversation,
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const MutableFlatbufferBuilder* entity_data_builder,
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std::vector<ActionSuggestion>* actions) const;
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private:
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struct CompiledRule {
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const RulesModel_::RegexRule* rule;
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std::unique_ptr<UniLib::RegexPattern> pattern;
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std::unique_ptr<UniLib::RegexPattern> output_pattern;
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CompiledRule(const RulesModel_::RegexRule* rule,
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std::unique_ptr<UniLib::RegexPattern> pattern,
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std::unique_ptr<UniLib::RegexPattern> output_pattern)
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: rule(rule),
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pattern(std::move(pattern)),
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output_pattern(std::move(output_pattern)) {}
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};
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// Decompresses and initializes a set of regular expression rules.
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bool InitializeRulesModel(const RulesModel* rules,
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ZlibDecompressor* decompressor,
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std::vector<CompiledRule>* compiled_rules) const;
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const UniLib& unilib_;
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const std::string smart_reply_action_type_;
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std::vector<CompiledRule> rules_, low_confidence_rules_;
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};
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} // namespace libtextclassifier3
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#endif // LIBTEXTCLASSIFIER_ACTIONS_REGEX_ACTIONS_H_
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