Question And Answered System

function register_question_post_type() {
    register_post_type('question', array(
        'labels' => array(
            'name' => __('Questions'),
            'singular_name' => __('Question'),
        ),
        'public' => true,
        'has_archive' => true,
        'rewrite' => array('slug' => 'questions'),
        'supports' => array('title', 'editor', 'comments'),
    ));
}
add_action('init', 'register_question_post_type');

function register_answer_post_type() {
    register_post_type('answer', array(
        'labels' => array(
            'name' => __('Answers'),
            'singular_name' => __('Answer'),
        ),
        'public' => true,
        'has_archive' => true,
        'rewrite' => array('slug' => 'answers'),
        'supports' => array('title', 'editor'),
    ));
}
add_action('init', 'register_answer_post_type');

function add_answer_meta_box() {
    add_meta_box('answer_meta_box', 'Answer Details', 'render_answer_meta_box', 'answer', 'normal', 'high');
}
add_action('add_meta_boxes', 'add_answer_meta_box');

function render_answer_meta_box($post) {
    $user_id = get_post_meta($post->ID, 'user_id', true);
    $question_id = get_post_meta($post->ID, 'question_id', true);
    ?>
    <label for="user_id">User ID:</label>
    <input type="text" id="user_id" name="user_id" value="<?php echo esc_attr($user_id); ?>" disabled><br>
    <label for="question_id">Question ID:</label>
    <input type="text" id="question_id" name="question_id" value="<?php echo esc_attr($question_id); ?>" disabled><br>
    <?php
}

function save_answer_meta_box_data($post_id) {
    if (array_key_exists('user_id', $_POST)) {
        update_post_meta($post_id, 'user_id', sanitize_text_field($_POST['user_id']));
    }
    if (array_key_exists('question_id', $_POST)) {
        update_post_meta($post_id, 'question_id', sanitize_text_field($_POST['question_id']));
    }
}
add_action('save_post', 'save_answer_meta_box_data');

function register_custom_endpoints() {
    // Endpoint for creating a question
    register_rest_route('custom/v1', '/questions', array(
        'methods' => 'POST',
        'callback' => 'create_question',
        'permission_callback' => function () {
            return current_user_can('publish_posts');
        }
    ));

    // Endpoint for updating a question
    register_rest_route('custom/v1', '/questions/(?P<id>\d+)', array(
        'methods' => 'PUT',
        'callback' => 'update_question',
        'permission_callback' => function () {
            return current_user_can('edit_posts');
        }
    ));

    // Endpoint for deleting a question
    register_rest_route('custom/v1', '/questions/(?P<id>\d+)', array(
        'methods' => 'DELETE',
        'callback' => 'delete_question',
        'permission_callback' => function () {
            return current_user_can('delete_posts');
        }
    ));

    // Endpoint for creating an answer
    register_rest_route('custom/v1', '/answers', array(
        'methods' => 'POST',
        'callback' => 'create_answer',
        'permission_callback' => function () {
            return is_user_logged_in();
        }
    ));

    // Endpoint for updating an answer
    register_rest_route('custom/v1', '/answers/(?P<id>\d+)', array(
        'methods' => 'PUT',
        'callback' => 'update_answer',
        'permission_callback' => function () {
            return current_user_can('edit_posts');
        }
    ));

    // Endpoint for deleting an answer
    register_rest_route('custom/v1', '/answers/(?P<id>\d+)', array(
        'methods' => 'DELETE',
        'callback' => 'delete_answer',
        'permission_callback' => function () {
            return current_user_can('delete_posts');
        }
    ));
}
add_action('rest_api_init', 'register_custom_endpoints');

function create_question(WP_REST_Request $request) {
    $params = $request->get_json_params();

    // Ensure all required fields are present
    if (!isset($params['title'])) {
        return new WP_REST_Response(array('message' => 'Missing required fields'), 400);
    }

    $new_question = array(
        'post_title'    => sanitize_text_field($params['title']),
        'post_status'   => 'publish', // Example: Set initial status to 'publish'
        'post_type'     => 'question'
    );

    $question_id = wp_insert_post($new_question);

    if ($question_id) {
        // Update meta fields if necessary
        return new WP_REST_Response(array('message' => 'Question created successfully', 'question_id' => $question_id), 201);
    }

    return new WP_REST_Response(array('message' => 'Failed to create question'), 500);
}

function update_question(WP_REST_Request $request) {
    $params = $request->get_json_params();
    $question_id = (int) $request['id'];

    $updated_question = array(
        'ID' => $question_id,
        'post_title' => isset($params['title']) ? sanitize_text_field($params['title']) : '',
        // You can update other post fields as needed
    );

    $result = wp_update_post($updated_question);

    if ($result instanceof WP_Error) {
        return new WP_REST_Response(array('message' => 'Failed to update question'), 500);
    }

    // Update meta fields if necessary

    return new WP_REST_Response(array('message' => 'Question updated successfully', 'question_id' => $question_id), 200);
}

function delete_question(WP_REST_Request $request) {
    $question_id = (int) $request['id'];

    $result = wp_delete_post($question_id, true); // Set true to force delete

    if (!$result) {
        return new WP_REST_Response(array('message' => 'Failed to delete question'), 500);
    }

    return new WP_REST_Response(array('message' => 'Question deleted successfully'), 200);
}

function create_answer(WP_REST_Request $request) {
    $params = $request->get_json_params();

    // Ensure all required fields are present
    if (!isset($params['question_id'], $params['content'])) {
        return new WP_REST_Response(array('message' => 'Missing required fields'), 400);
    }

    $new_answer = array(
        'post_title'    => 'Answer for Question #' . $params['question_id'],
        'post_content'  => sanitize_textarea_field($params['content']),
        'post_status'   => 'publish', // Example: Set initial status to 'publish'
        'post_type'     => 'answer'
    );

    // Set author ID for the current logged-in user or any specific logic
    $author_id = get_current_user_id();
    if ($author_id) {
        $new_answer['post_author'] = $author_id;
    }

    $answer_id = wp_insert_post($new_answer);

    if ($answer_id) {
        // Update meta fields if necessary, e.g., link to the question
        update_post_meta($answer_id, 'question_id', sanitize_text_field($params['question_id']));

        return new WP_REST_Response(array('message' => 'Answer created successfully', 'answer_id' => $answer_id), 201);
    }

    return new WP_REST_Response(array('message' => 'Failed to create answer'), 500);
}

function update_answer(WP_REST_Request $request) {
    $params = $request->get_json_params();
    $answer_id = (int) $request['id'];

    $updated_answer = array(
        'ID' => $answer_id,
        'post_title' => isset($params['content']) ? sanitize_text_field($params['content']) : '',
        // You can update other post fields as needed
    );

    $result = wp_update_post($updated_answer);

    if ($result instanceof WP_Error) {
        return new WP_REST_Response(array('message' => 'Failed to update answer'), 500);
    }

    // Update meta fields if necessary

    return new WP_REST_Response(array('message' => 'Answer updated successfully', 'answer_id' => $answer_id), 200);
}

function delete_answer(WP_REST_Request $request) {
    $answer_id = (int) $request['id'];

    $result = wp_delete_post($answer_id, true); // Set true to force delete

    if (!$result) {
        return new WP_REST_Response(array('message' => 'Failed to delete answer'), 500);
    }

    return new WP_REST_Response(array('message' => 'Answer deleted successfully'), 200);
}