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import { getRequestHeaders } from '../../../script.js';
import { oai_settings } from '../../openai.js';
import { isValidUrl } from '../../utils.js';
import { getPreviewString, saveTtsProviderSettings } from './index.js';
export class GoogleNativeTtsProvider {
settings;
voices = [];
separator = ' . ';
audioElement = document.createElement('audio');
defaultSettings = {
voiceMap: {},
model: 'gemini-2.5-flash-preview-tts',
apiType: 'makersuite',
};
get settingsHtml() {
return `
<small>Hint: Save an API key in the Google AI Studio/Vertex AI connection settings</small>
<div id="google-native-tts-settings">
<div>
<label for="google-tts-api-type">API Type:</label>
<select id="google-tts-api-type">
<option value="makersuite">Google AI Studio (MakerSuite)</option>
<option value="vertexai" disabled>Google Vertex AI (unsupported)</option>
</select>
</div>
<div>
<label for="google-tts-model">Model:</label>
<select id="google-tts-model">
<option value="gemini-2.5-flash-preview-tts">Gemini 2.5 Flash Preview TTS</option>
<option value="gemini-2.5-pro-preview-tts">Gemini 2.5 Pro Preview TTS</option>
</select>
</div>
</div>`;
}
async loadSettings(settings) {
if (Object.keys(settings).length === 0) {
console.info('Using default Google TTS Provider settings');
}
this.settings = { ...this.defaultSettings, ...settings };
$('#google-tts-api-type').val(this.settings.apiType);
$('#google-tts-model').val(this.settings.model);
$('#google-tts-api-type, #google-tts-model').on('change', () => this.onSettingsChange());
try {
await this.checkReady();
console.debug('Google TTS: Settings loaded');
} catch (err) {
console.warn('Google TTS: Settings loaded, but not ready.', err.message);
}
}
onSettingsChange() {
this.settings.apiType = $('#google-tts-api-type').val();
this.settings.model = $('#google-tts-model').val();
this.voices = []; // Reset voices cache so it re-fetches
saveTtsProviderSettings();
}
async checkReady() {
await this.fetchTtsVoiceObjects();
}
async onRefreshClick() {
await this.checkReady();
}
async getVoice(voiceName) {
if (this.voices.length === 0) {
this.voices = await this.fetchTtsVoiceObjects();
}
const match = this.voices.find(voice => voice.name === voiceName || voice.voice_id === voiceName);
if (!match) {
throw `TTS Voice name ${voiceName} not found`;
}
return match;
}
async generateTts(text, voiceId) {
return await this.fetchNativeTtsGeneration(text, voiceId);
}
async fetchTtsVoiceObjects() {
try {
const response = await fetch('/api/google/list-native-voices', {
method: 'POST',
headers: getRequestHeaders(),
body: JSON.stringify({}),
});
if (!response.ok) {
let errorMessage = `HTTP ${response.status}: ${response.statusText}`;
try {
const errorJson = await response.json();
if (errorJson.error) {
errorMessage = errorJson.error;
}
} catch (parseError) {
// Response isn't valid JSON, use the HTTP error message
console.debug('Error response is not JSON:', parseError.message);
}
throw new Error(errorMessage);
}
const responseJson = await response.json();
if (!responseJson.voices || !Array.isArray(responseJson.voices)) {
throw new Error('Invalid response format: voices array not found');
}
this.voices = responseJson.voices;
console.info(`Google TTS: Loaded ${this.voices.length} voices`);
return this.voices;
} catch (error) {
console.error('Failed to fetch Google TTS voices:', error);
throw error;
}
}
async previewTtsVoice(id) {
this.audioElement.pause();
this.audioElement.currentTime = 0;
try {
const voice = await this.getVoice(id);
const text = getPreviewString(voice.lang || 'en-US');
const response = await this.fetchNativeTtsGeneration(text, id);
if (!response.ok) {
// Error is handled inside the fetch function, but we still need to stop here
return;
}
const audioBlob = await response.blob();
const url = URL.createObjectURL(audioBlob);
this.audioElement.src = url;
this.audioElement.play();
this.audioElement.onended = () => URL.revokeObjectURL(url);
} catch (error) {
console.error('TTS Preview Error:', error);
toastr.error(`Could not generate preview: ${error.message}`);
}
}
async fetchNativeTtsGeneration(text, voiceId) {
console.info(`Generating native Google TTS for voice_id ${voiceId}`);
const useReverseProxy = oai_settings.reverse_proxy && isValidUrl(oai_settings.reverse_proxy);
const response = await fetch('/api/google/generate-native-tts', {
method: 'POST',
headers: getRequestHeaders(),
body: JSON.stringify({
text: text,
voice: voiceId,
model: this.settings.model,
api: this.settings.apiType,
reverse_proxy: useReverseProxy ? oai_settings.reverse_proxy : '',
proxy_password: useReverseProxy ? oai_settings.proxy_password : '',
vertexai_auth_mode: oai_settings.vertexai_auth_mode,
vertexai_region: oai_settings.vertexai_region,
vertexai_express_project_id: oai_settings.vertexai_express_project_id,
}),
});
if (!response.ok) {
let errorMessage = `HTTP ${response.status}: ${response.statusText}`;
try {
const errorJson = await response.json();
if (errorJson.error) {
errorMessage = errorJson.error;
}
} catch {
// Not a JSON response, do nothing and keep the original http error
}
throw new Error(errorMessage);
}
return response;
}
}
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