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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_AI_ECHO_AI_LANGUAGE_MODEL_H_
#define CONTENT_BROWSER_AI_ECHO_AI_LANGUAGE_MODEL_H_
#include "base/containers/flat_set.h"
#include "base/memory/weak_ptr.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/remote_set.h"
#include "third_party/blink/public/mojom/ai/ai_language_model.mojom.h"
namespace content {
// The implementation of `blink::mojom::AILanguageModel` which only echoes
// back the prompt text used for testing.
class EchoAILanguageModel : public blink::mojom::AILanguageModel {
public:
explicit EchoAILanguageModel(
blink::mojom::AILanguageModelSamplingParamsPtr sampling_params,
base::flat_set<blink::mojom::AILanguageModelPromptType> input_types,
uint32_t initial_tokens_size);
EchoAILanguageModel(const EchoAILanguageModel&) = delete;
EchoAILanguageModel& operator=(const EchoAILanguageModel&) = delete;
~EchoAILanguageModel() override;
// `blink::mojom::AILanguageModel` implementation.
void Prompt(std::vector<blink::mojom::AILanguageModelPromptPtr> prompts,
on_device_model::mojom::ResponseConstraintPtr constraint,
mojo::PendingRemote<blink::mojom::ModelStreamingResponder>
pending_responder) override;
void Append(std::vector<blink::mojom::AILanguageModelPromptPtr> prompts,
mojo::PendingRemote<blink::mojom::ModelStreamingResponder>
pending_responder) override;
void Fork(
mojo::PendingRemote<blink::mojom::AIManagerCreateLanguageModelClient>
client) override;
void Destroy() override;
void MeasureInputUsage(
std::vector<blink::mojom::AILanguageModelPromptPtr> input,
MeasureInputUsageCallback callback) override;
private:
void DoMockExecution(const std::string& input,
mojo::RemoteSetElementId responder_id);
bool is_destroyed_ = false;
uint64_t current_tokens_ = 0;
blink::mojom::AILanguageModelSamplingParamsPtr sampling_params_;
// Prompt types supported by the language model in this session.
base::flat_set<blink::mojom::AILanguageModelPromptType> input_types_;
mojo::RemoteSet<blink::mojom::ModelStreamingResponder> responder_set_;
base::WeakPtrFactory<EchoAILanguageModel> weak_ptr_factory_{this};
};
} // namespace content
#endif // CONTENT_BROWSER_AI_ECHO_AI_LANGUAGE_MODEL_H_
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