add hook for other plugins to add koko analytics related settings

Author: dannyvankooten

src/class-admin.php

@@ -211,16 +211,19 @@ public function reset_statistics(): void
     public function save_settings(): void
     {
         check_admin_referer('koko_analytics_save_settings');
-        $new_settings                        = $_POST['koko_analytics_settings'];
+        $posted                        = $_POST['koko_analytics_settings'];
         $settings                            = get_settings();
-        $settings['exclude_ip_addresses']    = array_filter(array_map('trim', explode(PHP_EOL, str_replace(',', PHP_EOL, strip_tags($new_settings['exclude_ip_addresses'])))), function ($value) {
+
+        $settings['exclude_ip_addresses']    = array_filter(array_map('trim', explode(PHP_EOL, str_replace(',', PHP_EOL, strip_tags($posted['exclude_ip_addresses'])))), function ($value) {
             return $value !== '';
         });
-        $settings['exclude_user_roles']      = $new_settings['exclude_user_roles'] ?? array();
-        $settings['prune_data_after_months'] = abs((int) $new_settings['prune_data_after_months']);
-        $settings['use_cookie']              = (int) $new_settings['use_cookie'];
-        $settings['is_dashboard_public']     = (int) $new_settings['is_dashboard_public'];
-        $settings['default_view']            = trim($new_settings['default_view']);
+        $settings['exclude_user_roles']      = $posted['exclude_user_roles'] ?? array();
+        $settings['prune_data_after_months'] = abs((int) $posted['prune_data_after_months']);
+        $settings['use_cookie']              = (int) $posted['use_cookie'];
+        $settings['is_dashboard_public']     = (int) $posted['is_dashboard_public'];
+        $settings['default_view']            = trim($posted['default_view']);
+
+        $settings = apply_filters('koko_analytics_sanitize_settings', $settings, $posted);
         update_option('koko_analytics_settings', $settings, true);
         wp_safe_redirect(add_query_arg(array('settings-updated' => true), wp_get_referer()));
         exit;

src/views/settings-page.php

@@ -99,6 +99,9 @@
                 <input id="ka-prune-after-input" name="koko_analytics_settings[prune_data_after_months]" type="number" step="1" min="0" max="600" value="<?php echo esc_attr($settings['prune_data_after_months']); ?>"> <?php esc_html_e('months', 'koko-analytics'); ?>
                 <p class="description"><?php esc_html_e('Statistics older than the number of months configured here will automatically be deleted. Set to 0 to disable.', 'koko-analytics'); ?></p>
             </div>
+
+            <?php do_action('koko_analytics_show_settings_rows', $settings); ?>
+
             <div class="ka-margin-m">
                 <?php submit_button(null, 'primary', 'submit', false); ?>
             </div>