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<?php |
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|
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namespace FluentSupport\App\Services\Integrations\AI\Providers; |
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|
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use FluentSupport\App\Services\Integrations\AI\BaseAIProvider; |
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use WP_Error; |
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|
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class GeminiProvider extends BaseAIProvider |
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{ |
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protected $baseUrl = 'https://generativelanguage.googleapis.com/v1beta/models/'; |
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|
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public function getProviderName(): string |
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{ |
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return 'Gemini'; |
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} |
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|
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public function getAvailableModels(): array |
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{ |
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$models = [ |
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['value' => 'gemini-3.7-flash', 'label' => 'Gemini 3.7 Flash (Recommended)'], |
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['value' => 'gemini-3.6-flash', 'label' => 'Gemini 3.6 Flash'], |
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['value' => 'gemini-3.5-flash', 'label' => 'Gemini 3.5 Flash'], |
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['value' => 'gemini-3.5-flash-lite', 'label' => 'Gemini 3.5 Flash Lite (Fastest)'], |
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['value' => 'gemini-3.1-flash-lite', 'label' => 'Gemini 3.1 Flash Lite'], |
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['value' => 'gemini-2.5-pro', 'label' => 'Gemini 2.5 Pro'], |
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['value' => 'gemini-2.5-flash', 'label' => 'Gemini 2.5 Flash'], |
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['value' => 'gemini-2.5-flash-lite', 'label' => 'Gemini 2.5 Flash Lite'], |
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]; |
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|
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return apply_filters('fluent_support/supported_gemini_models', $models); |
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} |
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|
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/** |
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* @param int $ticketId |
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* @param string $prompt |
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* @param array $messages |
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* @return string|WP_Error |
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*/ |
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public function generateResponse(int $ticketId, string $prompt, array $messages = []) |
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{ |
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$url = $this->baseUrl . $this->model . ':generateContent?key=' . $this->apiKey; |
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|
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list($systemText, $contents) = $this->convertMessages($messages, $prompt); |
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|
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$payload = ['contents' => $contents]; |
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|
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if ($systemText) { |
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$payload['system_instruction'] = ['parts' => [['text' => $systemText]]]; |
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} |
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|
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// Gemini uses API key in URL — no Authorization header needed |
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$body = $this->sendRequest($url, $payload, []); |
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|
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if (is_wp_error($body)) { |
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return $body; |
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} |
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|
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$content = $body['candidates'][0]['content']['parts'][0]['text'] ?? ''; |
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$tokens = ($body['usageMetadata']['promptTokenCount'] ?? 0) |
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+ ($body['usageMetadata']['candidatesTokenCount'] ?? 0); |
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|
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$this->fireSuccessAction($ticketId, $prompt, $tokens); |
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|
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return $content; |
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} |
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|
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/** |
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* Converts OpenAI-format messages array to Gemini format. |
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* Returns [systemText, contents]. |
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*/ |
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private function convertMessages(array $messages, string $fallbackPrompt): array |
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{ |
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if (empty($messages)) { |
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return ['', [['role' => 'user', 'parts' => [['text' => $fallbackPrompt]]]]]; |
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} |
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|
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$systemText = ''; |
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$contents = []; |
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|
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foreach ($messages as $msg) { |
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if ($msg['role'] === 'system') { |
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$systemText = $msg['content']; |
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} else { |
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$contents[] = [ |
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'role' => $msg['role'] === 'assistant' ? 'model' : 'user', |
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'parts' => [['text' => $msg['content']]], |
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]; |
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} |
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} |
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|
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if (empty($contents)) { |
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$contents = [['role' => 'user', 'parts' => [['text' => $systemText ?: $fallbackPrompt]]]]; |
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$systemText = ''; |
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} |
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|
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return [$systemText, $contents]; |
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} |
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|
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} |
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|
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