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5f923cd | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | // Copyright 2026 The ODML Authors.
//
// 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.
#include "runtime/conversation/prompt_utils.h"
#include <variant>
#include "absl/status/status.h" // from @com_google_absl
#include "nlohmann/json.hpp" // from @nlohmann_json
#include "runtime/components/prompt_template.h"
#include "runtime/conversation/io_types.h"
#include "runtime/conversation/model_data_processor/model_data_processor.h"
#include "runtime/util/status_macros.h"
namespace litert::lm {
absl::Status FillPrefaceForPromptTemplateInput(
const Preface& preface, const ModelDataProcessor* model_data_processor,
PromptTemplateInput& tmpl_input) {
if (std::holds_alternative<JsonPreface>(preface)) {
auto json_preface = std::get<JsonPreface>(preface);
if (json_preface.messages.is_array()) {
for (auto& message : json_preface.messages) {
ASSIGN_OR_RETURN(nlohmann::ordered_json message_tmpl_input,
model_data_processor->MessageToTemplateInput(message));
tmpl_input.messages.push_back(message_tmpl_input);
}
}
if (json_preface.tools.is_null()) {
tmpl_input.tools = nullptr;
} else {
ASSIGN_OR_RETURN(tmpl_input.tools,
model_data_processor->FormatTools(json_preface.tools));
}
tmpl_input.extra_context = json_preface.extra_context;
} else {
return absl::UnimplementedError("Preface type is not supported yet");
}
return absl::OkStatus();
}
} // namespace litert::lm
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