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<?php |
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declare(strict_types=1); |
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/* For licensing terms, see /license.txt */ |
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namespace Chamilo\CoreBundle\Service\AI; |
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use Chamilo\CoreBundle\Entity\AiRequests; |
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use Chamilo\CoreBundle\Repository\AiRequestsRepository; |
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use Chamilo\CoreBundle\Settings\SettingsManager; |
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use Symfony\Bundle\SecurityBundle\Security; |
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use Symfony\Component\Security\Core\User\UserInterface; |
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use Symfony\Contracts\HttpClient\HttpClientInterface; |
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class DeepSeekAiProvider implements AiProviderInterface |
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{ |
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private string $apiUrl; |
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private string $apiKey; |
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private string $model; |
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private float $temperature; |
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private string $organizationId; |
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private int $monthlyTokenLimit; |
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private HttpClientInterface $httpClient; |
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private AiRequestsRepository $aiRequestsRepository; |
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private Security $security; |
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public function __construct( |
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HttpClientInterface $httpClient, |
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SettingsManager $settingsManager, |
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AiRequestsRepository $aiRequestsRepository, |
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Security $security |
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) { |
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$this->httpClient = $httpClient; |
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$this->aiRequestsRepository = $aiRequestsRepository; |
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$this->security = $security; |
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// Get AI providers from settings |
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$configJson = $settingsManager->getSetting('ai_helpers.ai_providers', true); |
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$config = json_decode($configJson, true) ?? []; |
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if (!isset($config['deepseek'])) { |
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throw new \RuntimeException('DeepSeek configuration is missing.'); |
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} |
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$this->apiUrl = $config['deepseek']['url'] ?? 'https://api.deepseek.com/chat/completions'; |
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$this->apiKey = $config['deepseek']['api_key'] ?? ''; |
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$this->model = $config['deepseek']['model'] ?? 'deepseek-chat'; |
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$this->temperature = $config['deepseek']['temperature'] ?? 0.7; |
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$this->organizationId = $config['deepseek']['organization_id'] ?? ''; |
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$this->monthlyTokenLimit = $config['deepseek']['monthly_token_limit'] ?? 1000; |
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if (empty($this->apiKey)) { |
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throw new \RuntimeException('DeepSeek API key is missing.'); |
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} |
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} |
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public function generateQuestions(string $topic, int $numQuestions, string $questionType, string $language): ?string |
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{ |
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$prompt = sprintf( |
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'Generate %d "%s" questions in Aiken format in the %s language about "%s". |
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Ensure each question follows this format: |
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1. The question text. |
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A. Option A |
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B. Option B |
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C. Option C |
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D. Option D |
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ANSWER: (Correct answer letter) |
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The output should be plain text without additional symbols or markdown.', |
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$numQuestions, $questionType, $language, $topic |
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); |
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return $this->requestDeepSeekAI($prompt, 'quiz'); |
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} |
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public function generateLearnPath(string $topic, int $chaptersCount, string $language, int $wordsCount, bool $addTests, int $numQuestions): ?array |
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{ |
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// Step 1: Generate the Table of Contents |
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$tableOfContentsPrompt = sprintf( |
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'Generate a structured table of contents for a course in "%s" with %d chapters on "%s". |
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Return a numbered list, each chapter on a new line. No conclusion.', |
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$language, $chaptersCount, $topic |
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); |
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$lpStructure = $this->requestDeepSeekAI($tableOfContentsPrompt, 'learnpath'); |
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if (!$lpStructure) { |
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return ['success' => false, 'message' => 'Failed to generate course structure.']; |
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} |
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// Step 2: Generate content for each chapter |
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$lpItems = []; |
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$chapters = explode("\n", trim($lpStructure)); |
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foreach ($chapters as $index => $chapterTitle) { |
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$chapterTitle = trim($chapterTitle); |
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if (empty($chapterTitle)) continue; |
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$chapterPrompt = sprintf( |
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'Create a learning chapter in HTML for "%s" in "%s" with %d words. |
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Title: "%s". Assume the reader already knows the context.', |
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$topic, $language, $wordsCount, $chapterTitle |
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); |
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$chapterContent = $this->requestDeepSeekAI($chapterPrompt, 'learnpath'); |
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if (!$chapterContent) continue; |
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$lpItems[] = [ |
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'title' => $chapterTitle, |
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'content' => "<html><head><title>{$chapterTitle}</title></head><body>{$chapterContent}</body></html>" |
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]; |
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} |
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// Step 3: Generate quizzes if enabled |
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$quizItems = []; |
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if ($addTests) { |
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foreach ($lpItems as &$chapter) { |
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$quizPrompt = sprintf( |
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'Generate %d multiple-choice questions in Aiken format in %s about "%s". |
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Ensure each question follows this format: |
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1. The question text. |
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A. Option A |
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B. Option B |
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C. Option C |
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D. Option D |
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ANSWER: (Correct answer letter) |
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Each question must have exactly 4 options and one answer line. |
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Return only valid questions without extra text.', |
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$numQuestions, $language, $chapter['title'] |
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); |
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$quizContent = $this->requestDeepSeekAI($quizPrompt, 'learnpath'); |
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if ($quizContent) { |
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$validQuestions = $this->filterValidAikenQuestions($quizContent); |
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if (!empty($validQuestions)) { |
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$quizItems[] = [ |
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'title' => "Quiz: " . $chapter['title'], |
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'content' => implode("\n\n", $validQuestions) |
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]; |
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} |
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} |
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} |
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} |
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return [ |
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'success' => true, |
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'topic' => $topic, |
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'lp_items' => $lpItems, |
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'quiz_items' => $quizItems |
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]; |
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} |
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private function filterValidAikenQuestions(string $quizContent): array |
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{ |
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$questions = preg_split('/\n{2,}/', trim($quizContent)); |
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$validQuestions = []; |
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foreach ($questions as $questionBlock) { |
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$lines = explode("\n", trim($questionBlock)); |
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if (count($lines) < 6) { |
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continue; |
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} |
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$options = array_slice($lines, 1, 4); |
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$validOptions = array_filter($options, fn($line) => preg_match('/^[A-D]\. .+/', $line)); |
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$answerLine = end($lines); |
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if (count($validOptions) === 4 && preg_match('/^ANSWER: [A-D]$/', $answerLine)) { |
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$validQuestions[] = implode("\n", $lines); |
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} |
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} |
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return $validQuestions; |
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} |
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private function requestDeepSeekAI(string $prompt, string $toolName): ?string |
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{ |
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$userId = $this->getUserId(); |
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if (!$userId) { |
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throw new \RuntimeException('User not authenticated.'); |
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} |
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$payload = [ |
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'model' => $this->model, |
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'messages' => [ |
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['role' => 'system', 'content' => 'You are a helpful AI assistant that generates structured educational content.'], |
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['role' => 'user', 'content' => $prompt] |
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], |
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'temperature' => $this->temperature, |
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'max_tokens' => 300, |
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]; |
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try { |
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$response = $this->httpClient->request('POST', $this->apiUrl, [ |
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'headers' => [ |
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'Authorization' => 'Bearer ' . $this->apiKey, |
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'Content-Type' => 'application/json', |
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], |
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'json' => $payload, |
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]); |
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$statusCode = $response->getStatusCode(); |
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$data = $response->toArray(); |
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if ($statusCode === 200 && isset($data['choices'][0]['message']['content'])) { |
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$generatedContent = $data['choices'][0]['message']['content']; |
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$aiRequest = new AiRequests(); |
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$aiRequest->setUserId($userId) |
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->setToolName($toolName) |
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->setRequestText($prompt) |
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->setPromptTokens($data['usage']['prompt_tokens'] ?? 0) |
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->setCompletionTokens($data['usage']['completion_tokens'] ?? 0) |
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->setTotalTokens($data['usage']['total_tokens'] ?? 0) |
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->setAiProvider('deepseek'); |
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$this->aiRequestsRepository->save($aiRequest); |
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return $generatedContent; |
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} |
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return null; |
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} catch (\Exception $e) { |
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error_log("ERROR - DeepSeek Request failed: " . $e->getMessage()); |
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return null; |
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} |
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} |
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private function getUserId(): ?int |
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{ |
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$user = $this->security->getUser(); |
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return $user instanceof UserInterface ? $user->getId() : null; |
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} |
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} |
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In PHP, under loose comparison (like
==
, or!=
, orswitch
conditions), values of different types might be equal.For
integer
values, zero is a special case, in particular the following results might be unexpected: