| @@ -1,402 +1,400 @@ | ||
| 1 | -<?php | |
| 2 | - | |
| 3 | -namespace LearnPress\AI\Assistant; | |
| 4 | - | |
| 5 | -use LearnPress\Services\OpenAiService; | |
| 6 | - | |
| 7 | -/** | |
| 8 | - * QuickQuizEngine — generates and drives interactive quick quizzes. | |
| 9 | - * | |
| 10 | - * Handles quiz generation from lesson content (start) and stateful | |
| 11 | - * answer evaluation across multiple turns (continue_session). | |
| 12 | - * | |
| 13 | - * @package LearnPress\AI\Assistant | |
| 14 | - * @since 4.3.5 | |
| 15 | - */ | |
| 16 | -class QuickQuizEngine { | |
| 17 | - | |
| 18 | - private const QUIZ_PROMPT_HISTORY_LIMIT = 3; | |
| 19 | - private const HISTORY_CONTENT_MAX_CHARS = 400; | |
| 20 | - | |
| 21 | - private TokenQuotaGuard $quota_guard; | |
| 22 | - private LanguageResolver $language_resolver; | |
| 23 | - private ResponseNormalizer $normalizer; | |
| 24 | - | |
| 25 | - public function __construct( | |
| 26 | - TokenQuotaGuard $quota_guard, | |
| 27 | - LanguageResolver $language_resolver, | |
| 28 | - ResponseNormalizer $normalizer | |
| 29 | - ) { | |
| 30 | - $this->quota_guard = $quota_guard; | |
| 31 | - $this->language_resolver = $language_resolver; | |
| 32 | - $this->normalizer = $normalizer; | |
| 33 | - } | |
| 34 | - | |
| 35 | - /** | |
| 36 | - * Start a new interactive quick quiz from lesson content. | |
| 37 | - * | |
| 38 | - * @param DataLoaders $loaders Data loader instance. | |
| 39 | - * @param string $user_message Learner input (may contain explicit count). | |
| 40 | - * @param int $lesson_id Current lesson ID. | |
| 41 | - * @param int $user_id Current user ID. | |
| 42 | - * @param array $history Conversation history. | |
| 43 | - * | |
| 44 | - * @return array{type: string, message: string, quiz: array|null} | |
| 45 | - */ | |
| 46 | - public function start( DataLoaders $loaders, string $user_message, int $lesson_id, int $user_id, array $history ): array { | |
| 47 | - | |
| 48 | - $lesson = $loaders->get_lesson_content( $lesson_id, $user_id ); | |
| 49 | - if ( ! empty( $lesson['error'] ) ) { | |
| 50 | - return $this->normalizer->build_response( $lesson['error'] ); | |
| 51 | - } | |
| 52 | - | |
| 53 | - $service = OpenAiService::instance(); | |
| 54 | - $history_slice = $this->slice_recent_history( $history, self::QUIZ_PROMPT_HISTORY_LIMIT ); | |
| 55 | - $question_count = $this->extract_requested_quiz_count( $user_message ); | |
| 56 | - $has_explicit_count = null !== $question_count; | |
| 57 | - $language_guidance = $this->language_resolver->build_instruction( $user_message, $history_slice, $user_id ); | |
| 58 | - | |
| 59 | - $system_instructions = $has_explicit_count | |
| 60 | - ? sprintf( | |
| 61 | - /* translators: %d: requested number of quiz questions. */ | |
| 62 | - __( 'Create a quick quiz from lesson content. Return ONLY valid JSON with keys: intro (string), questions (array of exactly %d items). Each question must contain: question (string), options (array of 4 strings), correct_index (0-3 integer), explanation (string).', 'learnpress' ), | |
| 63 | - $question_count | |
| 64 | - ) | |
| 65 | - : __( 'Create a quick quiz from lesson content with 3-5 questions. Return ONLY valid JSON with keys: intro (string), questions (array of objects). Each question must contain: question (string), options (array of 4 strings), correct_index (0-3 integer), explanation (string).', 'learnpress' ); | |
| 66 | - | |
| 67 | - $messages = array( | |
| 68 | - array( | |
| 69 | - 'role' => 'system', | |
| 70 | - 'content' => $system_instructions, | |
| 71 | - ), | |
| 72 | - array( | |
| 73 | - 'role' => 'system', | |
| 74 | - 'content' => $language_guidance, | |
| 75 | - ), | |
| 76 | - array( | |
| 77 | - 'role' => 'system', | |
| 78 | - 'content' => wp_json_encode( $lesson ), | |
| 79 | - ), | |
| 80 | - ); | |
| 81 | - | |
| 82 | - foreach ( $history_slice as $item ) { | |
| 83 | - if ( ! empty( $item['role'] ) && isset( $item['content'] ) ) { | |
| 84 | - $messages[] = array( | |
| 85 | - 'role' => $item['role'], | |
| 86 | - 'content' => $item['content'], | |
| 87 | - ); | |
| 88 | - } | |
| 89 | - } | |
| 90 | - | |
| 91 | - $messages[] = array( | |
| 92 | - 'role' => 'user', | |
| 93 | - 'content' => $user_message, | |
| 94 | - ); | |
| 95 | - | |
| 96 | - $response = $this->quota_guard->send_chat_with_guard( $service, $messages, $user_id ); | |
| 97 | - if ( $this->quota_guard->is_blocked() ) { | |
| 98 | - return $this->normalizer->build_response( $this->quota_guard->get_block_message() ); | |
| 99 | - } | |
| 100 | - | |
| 101 | - $content = (string) ( $response['content'] ?? '' ); | |
| 102 | - $decoded = $this->normalizer->decode_json( $content ); | |
| 103 | - $questions = $this->sanitize_quiz_questions( $decoded['questions'] ?? array(), $question_count ); | |
| 104 | - | |
| 105 | - if ( empty( $questions ) ) { | |
| 106 | - return $this->normalizer->build_response( __( 'I could not generate a quiz right now. Please try again.', 'learnpress' ) ); | |
| 107 | - } | |
| 108 | - | |
| 109 | - $quiz_state = array( | |
| 110 | - 'is_active' => true, | |
| 111 | - 'completed' => false, | |
| 112 | - 'current_index' => 0, | |
| 113 | - 'score' => 0, | |
| 114 | - 'total' => count( $questions ), | |
| 115 | - 'questions' => $questions, | |
| 116 | - ); | |
| 117 | - | |
| 118 | - return array( | |
| 119 | - 'type' => 'quiz', | |
| 120 | - 'message' => $decoded['intro'] ?? __( 'Quick quiz started. Answer each question to continue.', 'learnpress' ), | |
| 121 | - 'quiz' => $quiz_state, | |
| 122 | - ); | |
| 123 | - } | |
| 124 | - | |
| 125 | - /** | |
| 126 | - * Process an answer for an active quiz session and advance quiz state. | |
| 127 | - * | |
| 128 | - * @param string $user_message Learner answer input. | |
| 129 | - * @param array $state Current quiz state. | |
| 130 | - * | |
| 131 | - * @return array{type: string, message: string, quiz: array|null} | |
| 132 | - */ | |
| 133 | - public function continue_session( string $user_message, array $state ): array { | |
| 134 | - | |
| 135 | - $questions = $state['questions'] ?? array(); | |
| 136 | - $current = absint( $state['current_index'] ?? 0 ); | |
| 137 | - $score = absint( $state['score'] ?? 0 ); | |
| 138 | - | |
| 139 | - if ( empty( $questions ) || ! isset( $questions[ $current ] ) ) { | |
| 140 | - return $this->normalizer->build_response( __( 'Quiz state is invalid. Please start a new quick quiz.', 'learnpress' ) ); | |
| 141 | - } | |
| 142 | - | |
| 143 | - $question = $questions[ $current ]; | |
| 144 | - $answer_i = $this->parse_answer_index( $user_message, $question['options'] ?? array() ); | |
| 145 | - | |
| 146 | - if ( $answer_i === null ) { | |
| 147 | - return array( | |
| 148 | - 'type' => 'quiz', | |
| 149 | - 'message' => __( 'Please answer with option number (1-4), letter (A-D), or full option text.', 'learnpress' ), | |
| 150 | - 'quiz' => $state, | |
| 151 | - ); | |
| 152 | - } | |
| 153 | - | |
| 154 | - $correct_index = absint( $question['correct_index'] ?? 0 ); | |
| 155 | - $is_correct = $answer_i === $correct_index; | |
| 156 | - if ( $is_correct ) { | |
| 157 | - ++$score; | |
| 158 | - } | |
| 159 | - | |
| 160 | - $next_index = $current + 1; | |
| 161 | - $total = count( $questions ); | |
| 162 | - | |
| 163 | - $state['score'] = $score; | |
| 164 | - $state['current_index'] = $next_index; | |
| 165 | - $state['total'] = $total; | |
| 166 | - $state['feedback'] = array( | |
| 167 | - 'is_correct' => $is_correct, | |
| 168 | - 'selected_index' => $answer_i, | |
| 169 | - 'selected_answer' => $question['options'][ $answer_i ] ?? '', | |
| 170 | - 'correct_index' => $correct_index, | |
| 171 | - 'correct_answer' => $question['options'][ $correct_index ] ?? '', | |
| 172 | - 'explanation' => $question['explanation'] ?? '', | |
| 173 | - ); | |
| 174 | - | |
| 175 | - if ( $next_index >= $total ) { | |
| 176 | - $state['is_active'] = false; | |
| 177 | - $state['completed'] = true; | |
| 178 | - | |
| 179 | - return array( | |
| 180 | - 'type' => 'quiz', | |
| 181 | - 'message' => sprintf( | |
| 182 | - /* translators: 1: score, 2: total questions. */ | |
| 183 | - __( 'Quiz complete. You scored %1$d/%2$d.', 'learnpress' ), | |
| 184 | - $score, | |
| 185 | - $total | |
| 186 | - ), | |
| 187 | - 'quiz' => $state, | |
| 188 | - ); | |
| 189 | - } | |
| 190 | - | |
| 191 | - $state['is_active'] = true; | |
| 192 | - $state['completed'] = false; | |
| 193 | - | |
| 194 | - $message = $is_correct | |
| 195 | - ? __( 'Correct. Great job! Moving to the next question.', 'learnpress' ) | |
| 196 | - : __( 'Not quite. Let us move to the next question.', 'learnpress' ); | |
| 197 | - | |
| 198 | - return array( | |
| 199 | - 'type' => 'quiz', | |
| 200 | - 'message' => $message, | |
| 201 | - 'quiz' => $state, | |
| 202 | - ); | |
| 203 | - } | |
| 204 | - | |
| 205 | - // ---------------------------------------------------------------- | |
| 206 | - // Private helpers | |
| 207 | - // ---------------------------------------------------------------- | |
| 208 | - | |
| 209 | - /** | |
| 210 | - * Keep only recent and valid chat history rows for quiz-generation prompts. | |
| 211 | - * | |
| 212 | - * @param array $history Chat history. | |
| 213 | - * @param int $limit Number of rows to keep from the end. | |
| 214 | - * | |
| 215 | - * @return array<int, array{role: string, content: string}> | |
| 216 | - */ | |
| 217 | - private function slice_recent_history( array $history, int $limit ): array { | |
| 218 | - | |
| 219 | - $sanitized = array(); | |
| 220 | - | |
| 221 | - foreach ( $history as $item ) { | |
| 222 | - if ( ! is_array( $item ) ) { | |
| 223 | - continue; | |
| 224 | - } | |
| 225 | - | |
| 226 | - $role = (string) ( $item['role'] ?? '' ); | |
| 227 | - if ( ! in_array( $role, array( 'user', 'assistant' ), true ) ) { | |
| 228 | - continue; | |
| 229 | - } | |
| 230 | - | |
| 231 | - $content = trim( (string) ( $item['content'] ?? '' ) ); | |
| 232 | - if ( '' === $content ) { | |
| 233 | - continue; | |
| 234 | - } | |
| 235 | - | |
| 236 | - $sanitized[] = array( | |
| 237 | - 'role' => $role, | |
| 238 | - 'content' => mb_substr( $content, 0, self::HISTORY_CONTENT_MAX_CHARS, 'UTF-8' ), | |
| 239 | - ); | |
| 240 | - } | |
| 241 | - | |
| 242 | - if ( empty( $sanitized ) ) { | |
| 243 | - return array(); | |
| 244 | - } | |
| 245 | - | |
| 246 | - return array_slice( $sanitized, -1 * max( 1, $limit ) ); | |
| 247 | - } | |
| 248 | - | |
| 249 | - /** | |
| 250 | - * Parse learner answer into option index. | |
| 251 | - * | |
| 252 | - * Supports: numeric (1-4), letter (A-D), and exact option text. | |
| 253 | - * | |
| 254 | - * @param string $message Learner answer. | |
| 255 | - * @param array $options Current question options. | |
| 256 | - * | |
| 257 | - * @return int|null | |
| 258 | - */ | |
| 259 | - private function parse_answer_index( string $message, array $options ): ?int { | |
| 260 | - | |
| 261 | - $input = strtolower( trim( $message ) ); | |
| 262 | - if ( $input === '' ) { | |
| 263 | - return null; | |
| 264 | - } | |
| 265 | - | |
| 266 | - if ( preg_match( '/^[1-4]$/', $input ) ) { | |
| 267 | - return max( 0, (int) $input - 1 ); | |
| 268 | - } | |
| 269 | - | |
| 270 | - $letters = array( | |
| 271 | - 'a' => 0, | |
| 272 | - 'b' => 1, | |
| 273 | - 'c' => 2, | |
| 274 | - 'd' => 3, | |
| 275 | - ); | |
| 276 | - if ( isset( $letters[ $input ] ) ) { | |
| 277 | - return $letters[ $input ]; | |
| 278 | - } | |
| 279 | - | |
| 280 | - foreach ( $options as $index => $option ) { | |
| 281 | - if ( strtolower( trim( (string) $option ) ) === $input ) { | |
| 282 | - return (int) $index; | |
| 283 | - } | |
| 284 | - } | |
| 285 | - | |
| 286 | - return null; | |
| 287 | - } | |
| 288 | - | |
| 289 | - /** | |
| 290 | - * Extract the requested number of quiz questions from the learner message. | |
| 291 | - * | |
| 292 | - * Language-agnostic heuristic: | |
| 293 | - * - Prefer explicit numeric forms (e.g. "/quick-quiz 5", "quiz 5", "5 quiz"). | |
| 294 | - * - If only one standalone number is present, use it as requested count. | |
| 295 | - * - Return null when count cannot be inferred reliably. | |
| 296 | - * | |
| 297 | - * @param string $message Learner input. | |
| 298 | - * | |
| 299 | - * @return int|null | |
| 300 | - */ | |
| 301 | - private function extract_requested_quiz_count( string $message ): ?int { | |
| 302 | - | |
| 303 | - $normalized = trim( $message ); | |
| 304 | - if ( '' === $normalized ) { | |
| 305 | - return null; | |
| 306 | - } | |
| 307 | - | |
| 308 | - $normalized = mb_strtolower( $normalized, 'UTF-8' ); | |
| 309 | - $normalized = preg_replace( '/[^\p{L}\p{N}\s]+/u', ' ', $normalized ); | |
| 310 | - $normalized = is_string( $normalized ) ? trim( preg_replace( '/\s+/', ' ', $normalized ) ?? '' ) : ''; | |
| 311 | - if ( '' === $normalized ) { | |
| 312 | - return null; | |
| 313 | - } | |
| 314 | - | |
| 315 | - // Explicit command-like request: "/quick-quiz 5". | |
| 316 | - if ( preg_match( '/\/(?:mini|quick)-?quiz\s+(\d{1,2})(?=\s|$)/u', $normalized, $matches ) ) { | |
| 317 | - $count = (int) ( $matches[1] ?? 0 ); | |
| 318 | - return ( $count >= 1 && $count <= 20 ) ? $count : null; | |
| 319 | - } | |
| 320 | - | |
| 321 | - // Number close to "quiz" token works for most mixed-language requests. | |
| 322 | - if ( preg_match( '/(?:quiz[^\p{N}]{0,20}(\d{1,2})|(\d{1,2})[^\p{N}]{0,20}quiz)/u', $normalized, $matches ) ) { | |
| 323 | - $count = (int) ( $matches[1] ?: $matches[2] ?: 0 ); | |
| 324 | - if ( $count >= 1 && $count <= 20 ) { | |
| 325 | - return $count; | |
| 326 | - } | |
| 327 | - } | |
| 328 | - | |
| 329 | - // Fallback: if there is exactly one standalone number, treat it as count. | |
| 330 | - if ( preg_match_all( '/(?<!\p{N})(\d{1,2})(?!\p{N})/u', $normalized, $matches ) && count( $matches[1] ) === 1 ) { | |
| 331 | - $count = (int) $matches[1][0]; | |
| 332 | - if ( $count >= 1 && $count <= 20 ) { | |
| 333 | - return $count; | |
| 334 | - } | |
| 335 | - } | |
| 336 | - | |
| 337 | - return null; | |
| 338 | - } | |
| 339 | - | |
| 340 | - /** | |
| 341 | - * Sanitize and normalize generated quiz questions from model output. | |
| 342 | - * | |
| 343 | - * If $question_count is null, returns questions as-is (trusting OpenAI's output). | |
| 344 | - * If $question_count is set, caps to exactly that many questions. | |
| 345 | - * | |
| 346 | - * @param array $questions Raw question payload. | |
| 347 | - * @param int|null $question_count Maximum number of questions to keep, or null to trust model. | |
| 348 | - * | |
| 349 | - * @return array | |
| 350 | - */ | |
| 351 | - private function sanitize_quiz_questions( array $questions, ?int $question_count = null ): array { | |
| 352 | - | |
| 353 | - if ( empty( $questions ) || ! is_array( $questions ) ) { | |
| 354 | - return array(); | |
| 355 | - } | |
| 356 | - | |
| 357 | - // If no explicit count, trust OpenAI's output (typically 3-5 questions). | |
| 358 | - if ( $question_count === null ) { | |
| 359 | - return array_filter( | |
| 360 | - array_map( static fn( $q ) => is_array( $q ) ? $q : null, $questions ), | |
| 361 | - static fn( $q ) => null !== $q | |
| 362 | - ); | |
| 363 | - } | |
| 364 | - | |
| 365 | - $sanitized = array(); | |
| 366 | - foreach ( $questions as $question ) { | |
| 367 | - if ( ! is_array( $question ) ) { | |
| 368 | - continue; | |
| 369 | - } | |
| 370 | - | |
| 371 | - $options = $question['options'] ?? array(); | |
| 372 | - if ( ! is_array( $options ) || count( $options ) < 2 ) { | |
| 373 | - continue; | |
| 374 | - } | |
| 375 | - | |
| 376 | - $clean_options = array_values( | |
| 377 | - array_map( | |
| 378 | - static fn( $option ) => sanitize_text_field( (string) $option ), | |
| 379 | - $options | |
| 380 | - ) | |
| 381 | - ); | |
| 382 | - | |
| 383 | - $correct_index = absint( $question['correct_index'] ?? 0 ); | |
| 384 | - if ( $correct_index >= count( $clean_options ) ) { | |
| 385 | - $correct_index = 0; | |
| 386 | - } | |
| 387 | - | |
| 388 | - $sanitized[] = array( | |
| 389 | - 'question' => sanitize_text_field( (string) ( $question['question'] ?? '' ) ), | |
| 390 | - 'options' => $clean_options, | |
| 391 | - 'correct_index' => $correct_index, | |
| 392 | - 'explanation' => sanitize_textarea_field( (string) ( $question['explanation'] ?? '' ) ), | |
| 393 | - ); | |
| 394 | - | |
| 395 | - if ( count( $sanitized ) >= max( 1, $question_count ) ) { | |
| 396 | - break; | |
| 397 | - } | |
| 398 | - } | |
| 399 | - | |
| 400 | - return $sanitized; | |
| 401 | - } | |
| 402 | -} | |
| 1 | +<?php | |
| 2 | + | |
| 3 | +namespace LearnPress\AI\Assistant; | |
| 4 | + | |
| 5 | +use LearnPress\Services\OpenAiService; | |
| 6 | + | |
| 7 | +/** | |
| 8 | + * QuickQuizEngine — generates and drives interactive quick quizzes. | |
| 9 | + * | |
| 10 | + * Handles quiz generation from lesson content (start) and stateful | |
| 11 | + * answer evaluation across multiple turns (continue_session). | |
| 12 | + * | |
| 13 | + * @package LearnPress\AI\Assistant | |
| 14 | + * @since 4.3.5 | |
| 15 | + */ | |
| 16 | +class QuickQuizEngine { | |
| 17 | + | |
| 18 | + private const QUIZ_PROMPT_HISTORY_LIMIT = 3; | |
| 19 | + private const HISTORY_CONTENT_MAX_CHARS = 400; | |
| 20 | + | |
| 21 | + private TokenQuotaGuard $quota_guard; | |
| 22 | + private LanguageResolver $language_resolver; | |
| 23 | + private ResponseNormalizer $normalizer; | |
| 24 | + | |
| 25 | + public function __construct( | |
| 26 | + TokenQuotaGuard $quota_guard, | |
| 27 | + LanguageResolver $language_resolver, | |
| 28 | + ResponseNormalizer $normalizer | |
| 29 | + ) { | |
| 30 | + $this->quota_guard = $quota_guard; | |
| 31 | + $this->language_resolver = $language_resolver; | |
| 32 | + $this->normalizer = $normalizer; | |
| 33 | + } | |
| 34 | + | |
| 35 | + /** | |
| 36 | + * Start a new interactive quick quiz from lesson content. | |
| 37 | + * | |
| 38 | + * @param DataLoaders $loaders Data loader instance. | |
| 39 | + * @param string $user_message Learner input (may contain explicit count). | |
| 40 | + * @param int $lesson_id Current lesson ID. | |
| 41 | + * @param int $user_id Current user ID. | |
| 42 | + * @param array $history Conversation history. | |
| 43 | + * | |
| 44 | + * @return array{type: string, message: string, quiz: array|null} | |
| 45 | + */ | |
| 46 | + public function start( DataLoaders $loaders, string $user_message, int $lesson_id, int $user_id, array $history ): array { | |
| 47 | + | |
| 48 | + $lesson = $loaders->get_lesson_content( $lesson_id, $user_id ); | |
| 49 | + if ( ! empty( $lesson['error'] ) ) { | |
| 50 | + return $this->normalizer->build_response( $lesson['error'] ); | |
| 51 | + } | |
| 52 | + | |
| 53 | + $service = OpenAiService::instance(); | |
| 54 | + $history_slice = $this->slice_recent_history( $history, self::QUIZ_PROMPT_HISTORY_LIMIT ); | |
| 55 | + $question_count = $this->extract_requested_quiz_count( $user_message ); | |
| 56 | + $has_explicit_count = null !== $question_count; | |
| 57 | + $language_guidance = $this->language_resolver->build_instruction( $user_message, $history_slice, $user_id ); | |
| 58 | + | |
| 59 | + $system_instructions = $has_explicit_count | |
| 60 | + ? sprintf( | |
| 61 | + /* translators: %d: requested number of quiz questions. */ | |
| 62 | + __( 'Create a quick quiz from lesson content. Return ONLY valid JSON with keys: intro (string), questions (array of exactly %d items). Each question must contain: question (string), options (array of 4 strings), correct_index (0-3 integer), explanation (string).', 'learnpress' ), | |
| 63 | + $question_count | |
| 64 | + ) | |
| 65 | + : __( 'Create a quick quiz from lesson content with 3-5 questions. Return ONLY valid JSON with keys: intro (string), questions (array of objects). Each question must contain: question (string), options (array of 4 strings), correct_index (0-3 integer), explanation (string).', 'learnpress' ); | |
| 66 | + | |
| 67 | + $messages = array( | |
| 68 | + array( | |
| 69 | + 'role' => 'system', | |
| 70 | + 'content' => $system_instructions, | |
| 71 | + ), | |
| 72 | + array( | |
| 73 | + 'role' => 'system', | |
| 74 | + 'content' => $language_guidance, | |
| 75 | + ), | |
| 76 | + array( | |
| 77 | + 'role' => 'system', | |
| 78 | + 'content' => wp_json_encode( $lesson ), | |
| 79 | + ), | |
| 80 | + ); | |
| 81 | + | |
| 82 | + foreach ( $history_slice as $item ) { | |
| 83 | + if ( ! empty( $item['role'] ) && isset( $item['content'] ) ) { | |
| 84 | + $messages[] = array( | |
| 85 | + 'role' => $item['role'], | |
| 86 | + 'content' => $item['content'], | |
| 87 | + ); | |
| 88 | + } | |
| 89 | + } | |
| 90 | + | |
| 91 | + $messages[] = array( | |
| 92 | + 'role' => 'user', | |
| 93 | + 'content' => $user_message, | |
| 94 | + ); | |
| 95 | + | |
| 96 | + $response = $this->quota_guard->send_chat_with_guard( $service, $messages, $user_id ); | |
| 97 | + if ( $this->quota_guard->is_blocked() ) { | |
| 98 | + return $this->normalizer->build_response( $this->quota_guard->get_block_message() ); | |
| 99 | + } | |
| 100 | + | |
| 101 | + $content = (string) ( $response['content'] ?? '' ); | |
| 102 | + $decoded = $this->normalizer->decode_json( $content ); | |
| 103 | + $questions = $this->sanitize_quiz_questions( $decoded['questions'] ?? array(), $question_count ); | |
| 104 | + | |
| 105 | + if ( empty( $questions ) ) { | |
| 106 | + return $this->normalizer->build_response( __( 'I could not generate a quiz right now. Please try again.', 'learnpress' ) ); | |
| 107 | + } | |
| 108 | + | |
| 109 | + $quiz_state = array( | |
| 110 | + 'is_active' => true, | |
| 111 | + 'completed' => false, | |
| 112 | + 'current_index' => 0, | |
| 113 | + 'score' => 0, | |
| 114 | + 'total' => count( $questions ), | |
| 115 | + 'questions' => $questions, | |
| 116 | + ); | |
| 117 | + | |
| 118 | + $intro = sanitize_textarea_field( (string) ( $decoded['intro'] ?? '' ) ); | |
| 119 | + | |
| 120 | + return array( | |
| 121 | + 'type' => 'quiz', | |
| 122 | + 'message' => ! empty( $intro ) ? $intro : __( 'Quick quiz started. Answer each question to continue.', 'learnpress' ), | |
| 123 | + 'quiz' => $quiz_state, | |
| 124 | + ); | |
| 125 | + } | |
| 126 | + | |
| 127 | + /** | |
| 128 | + * Process an answer for an active quiz session and advance quiz state. | |
| 129 | + * | |
| 130 | + * @param string $user_message Learner answer input. | |
| 131 | + * @param array $state Current quiz state. | |
| 132 | + * | |
| 133 | + * @return array{type: string, message: string, quiz: array|null} | |
| 134 | + */ | |
| 135 | + public function continue_session( string $user_message, array $state ): array { | |
| 136 | + | |
| 137 | + $questions = $state['questions'] ?? array(); | |
| 138 | + $current = absint( $state['current_index'] ?? 0 ); | |
| 139 | + $score = absint( $state['score'] ?? 0 ); | |
| 140 | + | |
| 141 | + if ( empty( $questions ) || ! isset( $questions[ $current ] ) ) { | |
| 142 | + return $this->normalizer->build_response( __( 'Quiz state is invalid. Please start a new quick quiz.', 'learnpress' ) ); | |
| 143 | + } | |
| 144 | + | |
| 145 | + $question = $questions[ $current ]; | |
| 146 | + $answer_i = $this->parse_answer_index( $user_message, $question['options'] ?? array() ); | |
| 147 | + | |
| 148 | + if ( $answer_i === null ) { | |
| 149 | + return array( | |
| 150 | + 'type' => 'quiz', | |
| 151 | + 'message' => __( 'Please answer with option number (1-4), letter (A-D), or full option text.', 'learnpress' ), | |
| 152 | + 'quiz' => $state, | |
| 153 | + ); | |
| 154 | + } | |
| 155 | + | |
| 156 | + $correct_index = absint( $question['correct_index'] ?? 0 ); | |
| 157 | + $is_correct = $answer_i === $correct_index; | |
| 158 | + if ( $is_correct ) { | |
| 159 | + ++$score; | |
| 160 | + } | |
| 161 | + | |
| 162 | + $next_index = $current + 1; | |
| 163 | + $total = count( $questions ); | |
| 164 | + | |
| 165 | + $state['score'] = $score; | |
| 166 | + $state['current_index'] = $next_index; | |
| 167 | + $state['total'] = $total; | |
| 168 | + $state['feedback'] = array( | |
| 169 | + 'is_correct' => $is_correct, | |
| 170 | + 'selected_index' => $answer_i, | |
| 171 | + 'selected_answer' => $question['options'][ $answer_i ] ?? '', | |
| 172 | + 'correct_index' => $correct_index, | |
| 173 | + 'correct_answer' => $question['options'][ $correct_index ] ?? '', | |
| 174 | + 'explanation' => $question['explanation'] ?? '', | |
| 175 | + ); | |
| 176 | + | |
| 177 | + if ( $next_index >= $total ) { | |
| 178 | + $state['is_active'] = false; | |
| 179 | + $state['completed'] = true; | |
| 180 | + | |
| 181 | + return array( | |
| 182 | + 'type' => 'quiz', | |
| 183 | + 'message' => sprintf( | |
| 184 | + /* translators: 1: score, 2: total questions. */ | |
| 185 | + __( 'Quiz complete. You scored %1$d/%2$d.', 'learnpress' ), | |
| 186 | + $score, | |
| 187 | + $total | |
| 188 | + ), | |
| 189 | + 'quiz' => $state, | |
| 190 | + ); | |
| 191 | + } | |
| 192 | + | |
| 193 | + $state['is_active'] = true; | |
| 194 | + $state['completed'] = false; | |
| 195 | + | |
| 196 | + $message = $is_correct | |
| 197 | + ? __( 'Correct. Great job! Moving to the next question.', 'learnpress' ) | |
| 198 | + : __( 'Not quite. Let us move to the next question.', 'learnpress' ); | |
| 199 | + | |
| 200 | + return array( | |
| 201 | + 'type' => 'quiz', | |
| 202 | + 'message' => $message, | |
| 203 | + 'quiz' => $state, | |
| 204 | + ); | |
| 205 | + } | |
| 206 | + | |
| 207 | + // ---------------------------------------------------------------- | |
| 208 | + // Private helpers | |
| 209 | + // ---------------------------------------------------------------- | |
| 210 | + | |
| 211 | + /** | |
| 212 | + * Keep only recent and valid chat history rows for quiz-generation prompts. | |
| 213 | + * | |
| 214 | + * @param array $history Chat history. | |
| 215 | + * @param int $limit Number of rows to keep from the end. | |
| 216 | + * | |
| 217 | + * @return array<int, array{role: string, content: string}> | |
| 218 | + */ | |
| 219 | + private function slice_recent_history( array $history, int $limit ): array { | |
| 220 | + | |
| 221 | + $sanitized = array(); | |
| 222 | + | |
| 223 | + foreach ( $history as $item ) { | |
| 224 | + if ( ! is_array( $item ) ) { | |
| 225 | + continue; | |
| 226 | + } | |
| 227 | + | |
| 228 | + $role = (string) ( $item['role'] ?? '' ); | |
| 229 | + if ( ! in_array( $role, array( 'user', 'assistant' ), true ) ) { | |
| 230 | + continue; | |
| 231 | + } | |
| 232 | + | |
| 233 | + $content = trim( (string) ( $item['content'] ?? '' ) ); | |
| 234 | + if ( '' === $content ) { | |
| 235 | + continue; | |
| 236 | + } | |
| 237 | + | |
| 238 | + $sanitized[] = array( | |
| 239 | + 'role' => $role, | |
| 240 | + 'content' => mb_substr( $content, 0, self::HISTORY_CONTENT_MAX_CHARS, 'UTF-8' ), | |
| 241 | + ); | |
| 242 | + } | |
| 243 | + | |
| 244 | + if ( empty( $sanitized ) ) { | |
| 245 | + return array(); | |
| 246 | + } | |
| 247 | + | |
| 248 | + return array_slice( $sanitized, -1 * max( 1, $limit ) ); | |
| 249 | + } | |
| 250 | + | |
| 251 | + /** | |
| 252 | + * Parse learner answer into option index. | |
| 253 | + * | |
| 254 | + * Supports: numeric (1-4), letter (A-D), and exact option text. | |
| 255 | + * | |
| 256 | + * @param string $message Learner answer. | |
| 257 | + * @param array $options Current question options. | |
| 258 | + * | |
| 259 | + * @return int|null | |
| 260 | + */ | |
| 261 | + private function parse_answer_index( string $message, array $options ): ?int { | |
| 262 | + | |
| 263 | + $input = strtolower( trim( $message ) ); | |
| 264 | + if ( $input === '' ) { | |
| 265 | + return null; | |
| 266 | + } | |
| 267 | + | |
| 268 | + if ( preg_match( '/^[1-4]$/', $input ) ) { | |
| 269 | + return max( 0, (int) $input - 1 ); | |
| 270 | + } | |
| 271 | + | |
| 272 | + $letters = array( | |
| 273 | + 'a' => 0, | |
| 274 | + 'b' => 1, | |
| 275 | + 'c' => 2, | |
| 276 | + 'd' => 3, | |
| 277 | + ); | |
| 278 | + if ( isset( $letters[ $input ] ) ) { | |
| 279 | + return $letters[ $input ]; | |
| 280 | + } | |
| 281 | + | |
| 282 | + foreach ( $options as $index => $option ) { | |
| 283 | + if ( strtolower( trim( (string) $option ) ) === $input ) { | |
| 284 | + return (int) $index; | |
| 285 | + } | |
| 286 | + } | |
| 287 | + | |
| 288 | + return null; | |
| 289 | + } | |
| 290 | + | |
| 291 | + /** | |
| 292 | + * Extract the requested number of quiz questions from the learner message. | |
| 293 | + * | |
| 294 | + * Language-agnostic heuristic: | |
| 295 | + * - Prefer explicit numeric forms (e.g. "/quick-quiz 5", "quiz 5", "5 quiz"). | |
| 296 | + * - If only one standalone number is present, use it as requested count. | |
| 297 | + * - Return null when count cannot be inferred reliably. | |
| 298 | + * | |
| 299 | + * @param string $message Learner input. | |
| 300 | + * | |
| 301 | + * @return int|null | |
| 302 | + */ | |
| 303 | + private function extract_requested_quiz_count( string $message ): ?int { | |
| 304 | + | |
| 305 | + $normalized = trim( $message ); | |
| 306 | + if ( '' === $normalized ) { | |
| 307 | + return null; | |
| 308 | + } | |
| 309 | + | |
| 310 | + $normalized = mb_strtolower( $normalized, 'UTF-8' ); | |
| 311 | + $normalized = preg_replace( '/[^\p{L}\p{N}\s]+/u', ' ', $normalized ); | |
| 312 | + $normalized = is_string( $normalized ) ? trim( preg_replace( '/\s+/', ' ', $normalized ) ?? '' ) : ''; | |
| 313 | + if ( '' === $normalized ) { | |
| 314 | + return null; | |
| 315 | + } | |
| 316 | + | |
| 317 | + // Explicit command-like request: "/quick-quiz 5". | |
| 318 | + if ( preg_match( '/\/(?:mini|quick)-?quiz\s+(\d{1,2})(?=\s|$)/u', $normalized, $matches ) ) { | |
| 319 | + $count = (int) ( $matches[1] ?? 0 ); | |
| 320 | + return ( $count >= 1 && $count <= 20 ) ? $count : null; | |
| 321 | + } | |
| 322 | + | |
| 323 | + // Number close to "quiz" token works for most mixed-language requests. | |
| 324 | + if ( preg_match( '/(?:quiz[^\p{N}]{0,20}(\d{1,2})|(\d{1,2})[^\p{N}]{0,20}quiz)/u', $normalized, $matches ) ) { | |
| 325 | + $count = (int) ( $matches[1] ?: $matches[2] ?: 0 ); | |
| 326 | + if ( $count >= 1 && $count <= 20 ) { | |
| 327 | + return $count; | |
| 328 | + } | |
| 329 | + } | |
| 330 | + | |
| 331 | + // Fallback: if there is exactly one standalone number, treat it as count. | |
| 332 | + if ( preg_match_all( '/(?<!\p{N})(\d{1,2})(?!\p{N})/u', $normalized, $matches ) && count( $matches[1] ) === 1 ) { | |
| 333 | + $count = (int) $matches[1][0]; | |
| 334 | + if ( $count >= 1 && $count <= 20 ) { | |
| 335 | + return $count; | |
| 336 | + } | |
| 337 | + } | |
| 338 | + | |
| 339 | + return null; | |
| 340 | + } | |
| 341 | + | |
| 342 | + /** | |
| 343 | + * Sanitize and normalize generated quiz questions from model output. | |
| 344 | + * | |
| 345 | + * Every question is sanitized and given a known shape regardless of whether an | |
| 346 | + * explicit count was requested. Model output is untrusted input: this state is sent | |
| 347 | + * to the browser, persisted in localStorage, and echoed back on the next turn, so | |
| 348 | + * the previous "trust the model when no count was asked for" path is not safe. | |
| 349 | + * | |
| 350 | + * $question_count only caps how many valid questions are kept. | |
| 351 | + * | |
| 352 | + * @param array $questions Raw question payload. | |
| 353 | + * @param int|null $question_count Exact number of questions to keep, or null to keep all valid ones. | |
| 354 | + * | |
| 355 | + * @return array | |
| 356 | + */ | |
| 357 | + private function sanitize_quiz_questions( array $questions, ?int $question_count = null ): array { | |
| 358 | + | |
| 359 | + if ( empty( $questions ) ) { | |
| 360 | + return array(); | |
| 361 | + } | |
| 362 | + | |
| 363 | + $sanitized = array(); | |
| 364 | + foreach ( $questions as $question ) { | |
| 365 | + if ( ! is_array( $question ) ) { | |
| 366 | + continue; | |
| 367 | + } | |
| 368 | + | |
| 369 | + $options = $question['options'] ?? array(); | |
| 370 | + if ( ! is_array( $options ) || count( $options ) < 2 ) { | |
| 371 | + continue; | |
| 372 | + } | |
| 373 | + | |
| 374 | + $clean_options = array_values( | |
| 375 | + array_map( | |
| 376 | + static fn( $option ) => sanitize_text_field( (string) $option ), | |
| 377 | + $options | |
| 378 | + ) | |
| 379 | + ); | |
| 380 | + | |
| 381 | + $correct_index = absint( $question['correct_index'] ?? 0 ); | |
| 382 | + if ( $correct_index >= count( $clean_options ) ) { | |
| 383 | + $correct_index = 0; | |
| 384 | + } | |
| 385 | + | |
| 386 | + $sanitized[] = array( | |
| 387 | + 'question' => sanitize_text_field( (string) ( $question['question'] ?? '' ) ), | |
| 388 | + 'options' => $clean_options, | |
| 389 | + 'correct_index' => $correct_index, | |
| 390 | + 'explanation' => sanitize_textarea_field( (string) ( $question['explanation'] ?? '' ) ), | |
| 391 | + ); | |
| 392 | + | |
| 393 | + if ( null !== $question_count && count( $sanitized ) >= max( 1, $question_count ) ) { | |
| 394 | + break; | |
| 395 | + } | |
| 396 | + } | |
| 397 | + | |
| 398 | + return $sanitized; | |
| 399 | + } | |
| 400 | +} | |
