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Q_And_A.php
558 lines
| 1 | <?php |
| 2 | /** |
| 3 | * Manage Q & A |
| 4 | * |
| 5 | * @package Tutor\Q_And_A |
| 6 | * @author Themeum <support@themeum.com> |
| 7 | * @link https://themeum.com |
| 8 | * @since 1.0.0 |
| 9 | */ |
| 10 | |
| 11 | namespace TUTOR; |
| 12 | |
| 13 | defined( 'ABSPATH' ) || exit; |
| 14 | |
| 15 | use Tutor\Helpers\QueryHelper; |
| 16 | use Tutor\Helpers\UrlHelper; |
| 17 | use Tutor\Models\EnrollmentModel; |
| 18 | use Tutor\Traits\JsonResponse; |
| 19 | /** |
| 20 | * Question answer management |
| 21 | * |
| 22 | * @since 1.0.0 |
| 23 | */ |
| 24 | class Q_And_A { |
| 25 | use JsonResponse; |
| 26 | |
| 27 | /** |
| 28 | * List of all possible Q&A question statuses. |
| 29 | * |
| 30 | * @since 3.7.2 |
| 31 | * |
| 32 | * @var string[] |
| 33 | */ |
| 34 | const STATUS_LIST = array( |
| 35 | 'all', |
| 36 | 'read', |
| 37 | 'unread', |
| 38 | 'important', |
| 39 | 'archived', |
| 40 | ); |
| 41 | |
| 42 | /** |
| 43 | * Register hooks |
| 44 | * |
| 45 | * @param boolean $register_hooks true/false to execute the hooks. |
| 46 | */ |
| 47 | public function __construct( $register_hooks = true ) { |
| 48 | if ( ! $register_hooks ) { |
| 49 | return; |
| 50 | } |
| 51 | |
| 52 | add_filter( 'tutor_learning_area_sub_page_nav_item', array( $this, 'add_learning_area_menu' ), 10, 2 ); |
| 53 | |
| 54 | add_action( 'wp_ajax_tutor_qna_create_update', array( $this, 'tutor_qna_create_update' ) ); |
| 55 | add_action( 'wp_ajax_tutor_qna_update', array( $this, 'ajax_qna_update' ) ); |
| 56 | add_action( 'wp_ajax_tutor_delete_dashboard_question', array( $this, 'tutor_delete_dashboard_question' ) ); |
| 57 | add_action( 'wp_ajax_tutor_qna_single_action', array( $this, 'tutor_qna_single_action' ) ); |
| 58 | add_action( 'wp_ajax_tutor_qna_bulk_action', array( $this, 'process_bulk_action' ) ); |
| 59 | add_action( 'wp_ajax_tutor_q_and_a_load_more', array( $this, 'load_more' ) ); |
| 60 | add_action( 'wp_ajax_tutor_qna_load_replies', array( $this, 'load_replies' ) ); |
| 61 | } |
| 62 | |
| 63 | /** |
| 64 | * Check if Q&A feature is enabled. |
| 65 | * |
| 66 | * @since 4.0.0 |
| 67 | * |
| 68 | * @return bool |
| 69 | */ |
| 70 | public static function is_enabled() { |
| 71 | return (bool) get_tutor_option( 'enable_q_and_a_on_course' ); |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * Check if Q&A is enabled for a specific course. |
| 76 | * |
| 77 | * @since 4.0.0 |
| 78 | * |
| 79 | * @param int $course_id course id. |
| 80 | * |
| 81 | * @return bool |
| 82 | */ |
| 83 | public static function is_enabled_for_course( $course_id ) { |
| 84 | return self::is_enabled() && 'yes' === get_post_meta( $course_id, Course::COURSE_ENABLE_QA_META, true ); |
| 85 | } |
| 86 | |
| 87 | /** |
| 88 | * Add learning area menu |
| 89 | * |
| 90 | * @since 4.0.0 |
| 91 | * |
| 92 | * @param array $menu_items the array of nav items. |
| 93 | * @param string $base_url the base url. |
| 94 | * |
| 95 | * @return array |
| 96 | */ |
| 97 | public function add_learning_area_menu( $menu_items, $base_url ) { |
| 98 | global $tutor_course_id; |
| 99 | |
| 100 | $user_id = get_current_user_id(); |
| 101 | $is_enabled_for_course = self::is_enabled_for_course( $tutor_course_id ); |
| 102 | $can_access = EnrollmentModel::is_enrolled( $tutor_course_id ) || tutor_utils()->has_user_course_content_access( $user_id, $tutor_course_id ); |
| 103 | |
| 104 | if ( $is_enabled_for_course && $can_access ) { |
| 105 | $qna_item = array( |
| 106 | 'qna' => array( |
| 107 | 'title' => __( 'Q&A', 'tutor' ), |
| 108 | 'icon' => Icon::QA, |
| 109 | 'url' => UrlHelper::add_query_params( $base_url, array( 'subpage' => 'qna' ) ), |
| 110 | 'template' => tutor_get_template( 'learning-area.subpages.qna' ), |
| 111 | ), |
| 112 | ); |
| 113 | |
| 114 | // Remove existing Q&A if Tutor already added it. |
| 115 | unset( $menu_items['qna'] ); |
| 116 | |
| 117 | $menu_items = $qna_item + $menu_items; |
| 118 | } |
| 119 | |
| 120 | return $menu_items; |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * Check user has access to QnA. |
| 125 | * |
| 126 | * @since 2.6.1 |
| 127 | * |
| 128 | * @param int $user_id user id. |
| 129 | * @param int $course_id course id. |
| 130 | * |
| 131 | * @return boolean |
| 132 | */ |
| 133 | public static function has_qna_access( $user_id, $course_id ) { |
| 134 | $is_public_course = Course_List::is_public( $course_id ); |
| 135 | |
| 136 | $has_access = $is_public_course |
| 137 | || User::is_admin() |
| 138 | || tutor_utils()->is_instructor_of_this_course( $user_id, $course_id ) |
| 139 | || EnrollmentModel::is_enrolled( $course_id, $user_id ); |
| 140 | return $has_access; |
| 141 | } |
| 142 | |
| 143 | /** |
| 144 | * Handle QnA create/update via AJAX. |
| 145 | * |
| 146 | * @since 1.0.0 |
| 147 | * |
| 148 | * @return void |
| 149 | */ |
| 150 | public function tutor_qna_create_update() { |
| 151 | tutor_utils()->checking_nonce(); |
| 152 | |
| 153 | $user_id = get_current_user_id(); |
| 154 | $course_id = Input::post( 'course_id', 0, Input::TYPE_INT ); |
| 155 | $question_id = Input::post( 'question_id', 0, Input::TYPE_INT ); |
| 156 | $context = Input::post( 'context' ); |
| 157 | |
| 158 | if ( $question_id ) { |
| 159 | $course_id = tutor_utils()->get_course_id_by( 'qa_question', $question_id ); |
| 160 | } |
| 161 | |
| 162 | if ( ! $course_id || ! $this->has_qna_access( $user_id, $course_id ) ) { |
| 163 | $this->response_bad_request( tutor_utils()->error_message() ); |
| 164 | } |
| 165 | |
| 166 | $qna_text = Input::post( 'answer', '', tutor()->has_pro ? Input::TYPE_KSES_POST : Input::TYPE_TEXTAREA ); |
| 167 | |
| 168 | if ( ! $qna_text ) { |
| 169 | $this->response_bad_request( __( 'Empty Content Not Allowed!', 'tutor' ) ); |
| 170 | } |
| 171 | |
| 172 | // Prepare user info. |
| 173 | $user = get_userdata( $user_id ); |
| 174 | $date = gmdate( 'Y-m-d H:i:s', tutor_time() ); |
| 175 | |
| 176 | $qna_object = new \stdClass(); |
| 177 | $qna_object->user_id = $user_id; |
| 178 | $qna_object->course_id = $course_id; |
| 179 | $qna_object->question_id = $question_id; |
| 180 | $qna_object->qna_text = $qna_text; |
| 181 | $qna_object->user = $user; |
| 182 | $qna_object->date = $date; |
| 183 | |
| 184 | $question_id = $this->inset_qna( $qna_object ); |
| 185 | |
| 186 | // Provide the html now. |
| 187 | // phpcs:disable WordPress.Security.NonceVerification.Missing |
| 188 | ob_start(); |
| 189 | tutor_load_template_from_custom_path( |
| 190 | tutor()->path . '/views/qna/qna-single.php', |
| 191 | array( |
| 192 | 'question_id' => $question_id, |
| 193 | 'back_url' => isset( $_POST['back_url'] ) ? esc_url_raw( wp_unslash( $_POST['back_url'] ) ) : '', |
| 194 | 'context' => $context, |
| 195 | ) |
| 196 | ); |
| 197 | wp_send_json_success( |
| 198 | array( |
| 199 | 'html' => ob_get_clean(), |
| 200 | 'editor_id' => 'tutor_qna_reply_editor_' . $question_id, |
| 201 | ) |
| 202 | ); |
| 203 | } |
| 204 | |
| 205 | /** |
| 206 | * Function to insert Q&A |
| 207 | * |
| 208 | * @param object $qna_object the object to insert. |
| 209 | * @return int |
| 210 | */ |
| 211 | public function inset_qna( $qna_object ) { |
| 212 | $course_id = $qna_object->course_id; |
| 213 | $question_id = $qna_object->question_id; |
| 214 | $qna_text = $qna_object->qna_text; |
| 215 | $user_id = $qna_object->user_id; |
| 216 | $user = $qna_object->user; |
| 217 | $date = $qna_object->date; |
| 218 | |
| 219 | // Insert data prepare. |
| 220 | $data = apply_filters( |
| 221 | 'tutor_qna_insert_data', |
| 222 | array( |
| 223 | 'comment_post_ID' => $course_id, |
| 224 | 'comment_author' => $user->user_login, |
| 225 | 'comment_date' => $date, |
| 226 | 'comment_date_gmt' => get_gmt_from_date( $date ), |
| 227 | 'comment_content' => $qna_text, |
| 228 | 'comment_approved' => 'approved', |
| 229 | 'comment_agent' => 'TutorLMSPlugin', |
| 230 | 'comment_type' => 'tutor_q_and_a', |
| 231 | 'comment_parent' => $question_id, |
| 232 | 'user_id' => $user_id, |
| 233 | ) |
| 234 | ); |
| 235 | |
| 236 | global $wpdb; |
| 237 | |
| 238 | // Insert new question/answer. |
| 239 | $wpdb->insert( $wpdb->comments, $data ); |
| 240 | ! $question_id ? $question_id = (int) $wpdb->insert_id : 0; |
| 241 | |
| 242 | // Mark the question unseen if action made from student. |
| 243 | $asker_id = $this->get_asker_id( $question_id ); |
| 244 | $self = $asker_id == $user_id; |
| 245 | update_comment_meta( $question_id, 'tutor_qna_read' . ( $self ? '' : '_' . $asker_id ), 0 ); |
| 246 | |
| 247 | do_action( 'tutor_after_asked_question', $data ); |
| 248 | |
| 249 | // question_id != 0 means it's a reply. |
| 250 | $reply_id = Input::post( 'question_id', 0, Input::TYPE_INT ); |
| 251 | $answer_id = (int) $wpdb->insert_id; |
| 252 | if ( 0 !== $reply_id && ( current_user_can( 'administrator' ) || tutor_utils()->is_instructor_of_this_course( $user_id, $course_id ) ) ) { |
| 253 | do_action( 'tutor_after_answer_to_question', $answer_id ); |
| 254 | } |
| 255 | |
| 256 | return $question_id; |
| 257 | } |
| 258 | |
| 259 | /** |
| 260 | * Update question [frontend dashboard] |
| 261 | * |
| 262 | * @since 4.0.0 |
| 263 | */ |
| 264 | public function ajax_qna_update() { |
| 265 | tutor_utils()->checking_nonce(); |
| 266 | |
| 267 | $question_id = Input::post( 'question_id', 0, Input::TYPE_INT ); |
| 268 | if ( ! $question_id || ! tutor_utils()->can_user_manage( 'qa_question', $question_id ) ) { |
| 269 | $this->response_bad_request( tutor_utils()->error_message( 'authorization' ) ); |
| 270 | } |
| 271 | |
| 272 | $qna_text = Input::post( 'answer', '', tutor()->has_pro ? Input::TYPE_KSES_POST : Input::TYPE_TEXTAREA ); |
| 273 | if ( ! $qna_text ) { |
| 274 | $this->response_bad_request( __( 'Empty Content Not Allowed!', 'tutor' ) ); |
| 275 | } |
| 276 | |
| 277 | $data = array( |
| 278 | 'comment_content' => $qna_text, |
| 279 | ); |
| 280 | |
| 281 | global $wpdb; |
| 282 | $wpdb->update( $wpdb->comments, $data, array( 'comment_ID' => $question_id ) ); |
| 283 | |
| 284 | $this->json_response( __( 'Comment edited successfully', 'tutor' ) ); |
| 285 | } |
| 286 | |
| 287 | /** |
| 288 | * Delete question [frontend dashboard] |
| 289 | * |
| 290 | * @since 1.6.4 |
| 291 | */ |
| 292 | public function tutor_delete_dashboard_question() { |
| 293 | tutor_utils()->checking_nonce(); |
| 294 | |
| 295 | $question_id = Input::post( 'question_id', 0, Input::TYPE_INT ); |
| 296 | if ( ! $question_id || ! tutor_utils()->can_user_manage( 'qa_question', $question_id ) ) { |
| 297 | $this->response_bad_request( tutor_utils()->error_message( 'authorization' ) ); |
| 298 | } |
| 299 | |
| 300 | $this->delete_qna_permanently( array( $question_id ) ); |
| 301 | |
| 302 | $this->json_response( __( 'Comment deleted successfully.', 'tutor' ) ); |
| 303 | } |
| 304 | |
| 305 | /** |
| 306 | * Delete question permanently |
| 307 | * |
| 308 | * @since 1.6.4 |
| 309 | * |
| 310 | * @param array $question_ids question ids. |
| 311 | * |
| 312 | * @return void |
| 313 | */ |
| 314 | public function delete_qna_permanently( $question_ids ) { |
| 315 | if ( is_array( $question_ids ) && count( $question_ids ) ) { |
| 316 | global $wpdb; |
| 317 | // Prepare in clause. |
| 318 | $question_ids = QueryHelper::prepare_in_clause( $question_ids ); |
| 319 | |
| 320 | // Deleting question (comment), child question and question meta (comment meta). |
| 321 | // phpcs:disable -- variable $question_ids is escaped. |
| 322 | $wpdb->query( |
| 323 | $wpdb->prepare( |
| 324 | "DELETE |
| 325 | FROM {$wpdb->comments} |
| 326 | WHERE {$wpdb->comments}.comment_ID IN ($question_ids) |
| 327 | AND 1 = %d |
| 328 | ", |
| 329 | 1 |
| 330 | ) |
| 331 | ); |
| 332 | |
| 333 | $wpdb->query( |
| 334 | $wpdb->prepare( |
| 335 | "DELETE |
| 336 | FROM {$wpdb->comments} |
| 337 | WHERE {$wpdb->comments}.comment_parent IN ($question_ids) |
| 338 | AND 1 = %d |
| 339 | ", |
| 340 | 1 |
| 341 | ) |
| 342 | ); |
| 343 | |
| 344 | $wpdb->query( |
| 345 | $wpdb->prepare( |
| 346 | "DELETE |
| 347 | FROM {$wpdb->commentmeta} |
| 348 | WHERE {$wpdb->commentmeta}.comment_id IN ($question_ids) |
| 349 | AND 1 = %d |
| 350 | ", |
| 351 | 1 |
| 352 | ) |
| 353 | ); |
| 354 | // phpcs:enable |
| 355 | } |
| 356 | } |
| 357 | |
| 358 | /** |
| 359 | * Process bulk delete |
| 360 | * |
| 361 | * @since v1.0.0 |
| 362 | * |
| 363 | * @return void send wp_json response |
| 364 | */ |
| 365 | public function process_bulk_action() { |
| 366 | tutor_utils()->checking_nonce(); |
| 367 | |
| 368 | $user_id = get_current_user_id(); |
| 369 | $action = Input::post( 'bulk-action' ); |
| 370 | |
| 371 | switch ( $action ) { |
| 372 | case 'delete': |
| 373 | $qa_ids = Input::post( 'bulk-ids', '' ); |
| 374 | $qa_ids = explode( ',', $qa_ids ); |
| 375 | $qa_ids = array_filter( |
| 376 | $qa_ids, |
| 377 | function ( $id ) use ( $user_id ) { |
| 378 | return is_numeric( $id ) && tutor_utils()->can_user_manage( 'qa_question', $id, $user_id ); |
| 379 | } |
| 380 | ); |
| 381 | |
| 382 | $this->delete_qna_permanently( $qa_ids ); |
| 383 | break; |
| 384 | } |
| 385 | |
| 386 | wp_send_json_success(); |
| 387 | } |
| 388 | |
| 389 | /** |
| 390 | * Get user id who asked |
| 391 | * |
| 392 | * @param int $question_id question id. |
| 393 | * |
| 394 | * @return string author id |
| 395 | */ |
| 396 | private function get_asker_id( $question_id ) { |
| 397 | global $wpdb; |
| 398 | $author_id = $wpdb->get_var( |
| 399 | $wpdb->prepare( |
| 400 | "SELECT user_id |
| 401 | FROM {$wpdb->comments} |
| 402 | WHERE comment_ID = %d |
| 403 | ", |
| 404 | $question_id |
| 405 | ) |
| 406 | ); |
| 407 | return $author_id; |
| 408 | } |
| 409 | |
| 410 | /** |
| 411 | * Update comment meta function |
| 412 | * |
| 413 | * @return void send wp_json response |
| 414 | */ |
| 415 | public function tutor_qna_single_action() { |
| 416 | tutor_utils()->checking_nonce(); |
| 417 | |
| 418 | $question_id = Input::post( 'question_id', 0, Input::TYPE_INT ); |
| 419 | |
| 420 | if ( ! tutor_utils()->can_user_manage( 'qa_question', $question_id ) ) { |
| 421 | $this->response_bad_request( tutor_utils()->error_message( 'authorization' ) ); |
| 422 | } |
| 423 | |
| 424 | // Get who asked the question. |
| 425 | $context = Input::post( 'context', '' ); |
| 426 | $user_id = get_current_user_id(); |
| 427 | |
| 428 | // Get the existing value from meta. |
| 429 | $action = Input::post( 'qna_action', '' ); |
| 430 | |
| 431 | $new_value = $this->trigger_qna_action( $question_id, $action, $context, $user_id ); |
| 432 | |
| 433 | // Transfer the new status. |
| 434 | wp_send_json_success( array( 'new_value' => $new_value ) ); |
| 435 | } |
| 436 | |
| 437 | /** |
| 438 | * Function to update Q&A action |
| 439 | * |
| 440 | * @since 2.6.2 |
| 441 | * |
| 442 | * @param int $question_id question id. |
| 443 | * @param string $action action name. |
| 444 | * @param string $context context name. |
| 445 | * @param int $user_id user id. |
| 446 | * |
| 447 | * @return int |
| 448 | */ |
| 449 | public function trigger_qna_action( $question_id, $action, $context, $user_id ) { |
| 450 | $asker_prefix = 'frontend-dashboard-qna-table-student' === $context ? '_' . $user_id : ''; |
| 451 | |
| 452 | // If current user asker, then make it unread for self. |
| 453 | // If it is instructor, then make unread for instructor side. |
| 454 | $meta_key = 'tutor_qna_' . $action . $asker_prefix; |
| 455 | |
| 456 | $current_value = (int) get_comment_meta( $question_id, $meta_key, true ); |
| 457 | |
| 458 | $new_value = 1 === $current_value ? 0 : 1; |
| 459 | |
| 460 | // Update the reverted value. |
| 461 | update_comment_meta( $question_id, $meta_key, $new_value ); |
| 462 | |
| 463 | return $new_value; |
| 464 | } |
| 465 | |
| 466 | /** |
| 467 | * Available tabs that will visible on the right side of page navbar |
| 468 | * |
| 469 | * @since v2.0.0 |
| 470 | * |
| 471 | * @param mixed $asker_id asker id. |
| 472 | * |
| 473 | * @return array |
| 474 | */ |
| 475 | public static function tabs_key_value( $asker_id = null ) { |
| 476 | |
| 477 | $args = Input::has( 'course-id' ) ? array( 'course_id' => Input::get( 'course-id', 0, Input::TYPE_INT ) ) : array(); |
| 478 | $stats = array(); |
| 479 | |
| 480 | // Loop through all predefined Q&A statuses to retrieve corresponding question statistics. |
| 481 | foreach ( self::STATUS_LIST as $status ) { |
| 482 | |
| 483 | $label = 'all' === $status ? null : $status; |
| 484 | $stats[ $status ] = tutor_utils()->get_qa_questions( 0, 99999, '', null, null, $asker_id, $label, true, $args ); |
| 485 | } |
| 486 | |
| 487 | // Assign value, url etc to the tab array. |
| 488 | $tabs = array_map( |
| 489 | function ( $tab ) use ( $stats ) { |
| 490 | return array( |
| 491 | 'key' => 'all' === $tab ? '' : $tab, |
| 492 | 'title' => tutor_utils()->translate_dynamic_text( $tab ), |
| 493 | 'value' => $stats[ $tab ], |
| 494 | 'url' => add_query_arg( array( 'data' => $tab ), remove_query_arg( 'data' ) ), |
| 495 | ); |
| 496 | }, |
| 497 | array_keys( $stats ) |
| 498 | ); |
| 499 | |
| 500 | return $tabs; |
| 501 | } |
| 502 | |
| 503 | /** |
| 504 | * Load more q & a |
| 505 | * |
| 506 | * @since v2.0.6 |
| 507 | * |
| 508 | * @return void send wp_json response |
| 509 | */ |
| 510 | public static function load_more() { |
| 511 | tutor_utils()->checking_nonce(); |
| 512 | ob_start(); |
| 513 | tutor_load_template( 'single.course.enrolled.question_and_answer' ); |
| 514 | $html = ob_get_clean(); |
| 515 | wp_send_json_success( array( 'html' => $html ) ); |
| 516 | } |
| 517 | |
| 518 | /** |
| 519 | * Load replies |
| 520 | * |
| 521 | * @since 4.0.0 |
| 522 | * |
| 523 | * @return void send wp_json response |
| 524 | */ |
| 525 | public function load_replies() { |
| 526 | tutor_utils()->checking_nonce(); |
| 527 | |
| 528 | $comment_id = Input::post( 'comment_id', 0, Input::TYPE_INT ); |
| 529 | $replies_order = QueryHelper::get_valid_sort_order( Input::post( 'order', 'DESC' ) ); |
| 530 | $context = Input::post( 'context', 'dashboard' ); |
| 531 | |
| 532 | if ( ! $comment_id ) { |
| 533 | $this->response_bad_request( __( 'Invalid comment ID', 'tutor' ) ); |
| 534 | } |
| 535 | |
| 536 | $user_id = get_current_user_id(); |
| 537 | $replies = tutor_utils()->get_qa_answer_by_question( $comment_id, $replies_order, 'frontend' ); |
| 538 | |
| 539 | $template = 'dashboard.discussions.qna-replies'; |
| 540 | if ( 'learning-area' === $context ) { |
| 541 | $template = 'learning-area.subpages.qna.replies'; |
| 542 | } |
| 543 | |
| 544 | ob_start(); |
| 545 | tutor_load_template( |
| 546 | $template, |
| 547 | array( |
| 548 | 'replies' => $replies, |
| 549 | 'replies_order' => $replies_order, |
| 550 | 'user_id' => $user_id, |
| 551 | ) |
| 552 | ); |
| 553 | $html = ob_get_clean(); |
| 554 | |
| 555 | $this->json_response( '', array( 'html' => $html ) ); |
| 556 | } |
| 557 | } |
| 558 |