rangerhq-radio/inc/settings.php

<?php
/**
 * Radio — Settings page.
 *
 * Lets the user pick default station + volume + theme + dashboard
 * widget opt-out.
 */

if ( ! defined( 'ABSPATH' ) ) { exit; }

function radio_render_settings_page() {
    if ( ! current_user_can( 'read' ) ) {
        wp_die( esc_html__( 'You do not have permission to view this page.', 'rangerhq-radio' ) );
    }

    // Handle form submission.
    if ( isset( $_POST['radio_settings_submit'] )
        && check_admin_referer( 'radio_save_settings', 'radio_settings_nonce' ) ) {

        $patch = array();

        if ( isset( $_POST['default_station'] ) ) {
            $patch['station_id'] = sanitize_key( wp_unslash( $_POST['default_station'] ) );
        }
        if ( isset( $_POST['default_volume'] ) ) {
            $patch['volume'] = max( 0.0, min( 1.0, ( (float) $_POST['default_volume'] ) / 100.0 ) );
        }
        if ( isset( $_POST['theme'] ) ) {
            $patch['theme'] = sanitize_key( wp_unslash( $_POST['theme'] ) );
        }

        radio_update_state( $patch );

        // Dashboard-widget opt-out is stored in state too (extra key).
        $hide_widget = ! empty( $_POST['hide_dashboard_widget'] );
        $user_id     = get_current_user_id();
        $state       = radio_get_state( $user_id );
        $state['hide_dashboard_widget'] = $hide_widget ? 1 : 0;
        update_user_meta( $user_id, RADIO_META_KEY, $state );

        echo '<div class="notice notice-success is-dismissible"><p>' . esc_html__( 'Settings saved.', 'rangerhq-radio' ) . '</p></div>';
    }

    $state    = radio_get_state();
    $stations = radio_get_stations_grouped();
    $hide_widget = ! empty( $state['hide_dashboard_widget'] );
    ?>
    <div class="wrap radio-settings-wrap">
        <h1>
            <?php esc_html_e( 'Radio — Settings', 'rangerhq-radio' ); ?>
            <span class="radio-version-badge">v<?php echo esc_html( RADIO_VERSION ); ?></span>
        </h1>

        <form method="post" action="">
            <?php wp_nonce_field( 'radio_save_settings', 'radio_settings_nonce' ); ?>

            <table class="form-table" role="presentation">
                <tr>
                    <th scope="row">
                        <label for="default_station"><?php esc_html_e( 'Default station', 'rangerhq-radio' ); ?></label>
                    </th>
                    <td>
                        <select id="default_station" name="default_station">
                            <?php foreach ( $stations as $genre => $entries ) :
                                if ( empty( $entries ) ) { continue; }
                            ?>
                                <optgroup label="<?php echo esc_attr( $genre ); ?>">
                                    <?php foreach ( $entries as $entry ) : ?>
                                        <option value="<?php echo esc_attr( $entry['id'] ); ?>" <?php selected( $entry['id'], $state['station_id'] ); ?>>
                                            <?php echo esc_html( $entry['name'] ); ?>
                                        </option>
                                    <?php endforeach; ?>
                                </optgroup>
                            <?php endforeach; ?>
                        </select>
                        <p class="description">
                            <?php esc_html_e( 'The station that loads when you open Radio in a fresh tab.', 'rangerhq-radio' ); ?>
                        </p>
                    </td>
                </tr>

                <tr>
                    <th scope="row">
                        <label for="default_volume"><?php esc_html_e( 'Default volume', 'rangerhq-radio' ); ?></label>
                    </th>
                    <td>
                        <input type="range" id="default_volume" name="default_volume" min="0" max="100" value="<?php echo esc_attr( (int) round( $state['volume'] * 100 ) ); ?>" aria-describedby="default_volume_label">
                        <span id="default_volume_label"><?php echo esc_html( (int) round( $state['volume'] * 100 ) ); ?>%</span>
                    </td>
                </tr>

                <tr>
                    <th scope="row">
                        <label for="theme"><?php esc_html_e( 'Theme', 'rangerhq-radio' ); ?></label>
                    </th>
                    <td>
                        <select id="theme" name="theme">
                            <option value="auto"  <?php selected( $state['theme'], 'auto' ); ?>><?php esc_html_e( 'Auto (match WP admin colour scheme)', 'rangerhq-radio' ); ?></option>
                            <option value="light" <?php selected( $state['theme'], 'light' ); ?>><?php esc_html_e( 'Light', 'rangerhq-radio' ); ?></option>
                            <option value="dark"  <?php selected( $state['theme'], 'dark' ); ?>><?php esc_html_e( 'Dark', 'rangerhq-radio' ); ?></option>
                        </select>
                    </td>
                </tr>

                <tr>
                    <th scope="row">
                        <?php esc_html_e( 'Dashboard widget', 'rangerhq-radio' ); ?>
                    </th>
                    <td>
                        <label>
                            <input type="checkbox" name="hide_dashboard_widget" value="1" <?php checked( $hide_widget ); ?>>
                            <?php esc_html_e( 'Hide the Radio widget from the WordPress Dashboard', 'rangerhq-radio' ); ?>
                        </label>
                        <p class="description">
                            <?php esc_html_e( 'When checked, Radio is only accessible from the dedicated admin page (WP Admin → Radio → My Radio).', 'rangerhq-radio' ); ?>
                        </p>
                    </td>
                </tr>
            </table>

            <?php submit_button( __( 'Save Changes', 'rangerhq-radio' ), 'primary', 'radio_settings_submit' ); ?>
        </form>
    </div>
    <?php
}