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/*
* Copyright 2024 jacqueline <me@jacqueline.id.au>
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#include "tts/provider.hpp"
#include <stdint.h>
#include <ios>
#include <optional>
#include <sstream>
#include <string>
#include <variant>
#include "drivers/storage.hpp"
#include "esp_log.h"
#include "komihash.h"
#include "tts/events.hpp"
namespace tts {
[[maybe_unused]] static constexpr char kTag[] = "tts";
static const char* kTtsPath = "/.tangara-tts/";
static auto textToFile(const std::string& text) -> std::optional<std::string> {
uint64_t hash = komihash(text.data(), text.size(), 0);
std::stringstream stream;
// Assume the TTS sample is a .wav file; since we only support one low-RAM
// overhead codec, we can presume the suffix. The suffix is needed, else we
// fail to open the stream when it fails to autodetect the format when looking
// up tags.
stream << kTtsPath << std::hex << hash << ".wav";
return stream.str();
}
Provider::Provider(drivers::NvsStorage& nvs) : nvs_(nvs) {
tts_enabled_ = nvs_.UITextToSpeech();
}
auto Provider::player(std::unique_ptr<Player> p) -> void {
player_ = std::move(p);
}
auto Provider::feed(const Event& e) -> void {
if (std::holds_alternative<SimpleEvent>(e)) {
// ESP_LOGI(kTag, "context changed");
} else if (std::holds_alternative<TtsEnabledChanged>(e)) {
auto ev = std::get<TtsEnabledChanged>(e);
tts_enabled_ = ev.tts_enabled;
} else if (std::holds_alternative<SelectionChanged>(e)) {
auto ev = std::get<SelectionChanged>(e);
if (!ev.new_selection) {
// ESP_LOGI(kTag, "no selection");
} else {
// ESP_LOGI(kTag, "new selection: '%s', interactive? %i",
// ev.new_selection->description.value_or("").c_str(),
// ev.new_selection->is_interactive);
auto text = ev.new_selection->description;
if (!text) {
ESP_LOGW(kTag, "missing description for element");
return;
}
auto file = textToFile(*text);
if (!file) {
return;
}
if (player_ && tts_enabled_) {
player_->playFile(*text, *file);
}
}
}
}
} // namespace tts
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