/* Copyright 2011 jacobbrett
   License: GPLv2
*/

<?php
class bandcamp_integration {
    function bandcamp_integration() {
        // Add admin options page
        add_action( 'admin_menu', '$this->admin_menu' );
        // Add admin settings
        add_action( 'admin_init', '$this->admin_init' );
    }

    // Add admin options page
    function admin_menu() {
        add_options_page( 'BandCamp Integration', 'BandCamp', 'manage_options', 'bandcamp-integration', 'options_page' );
    }

    // Display admin options page
    function options_page() {
?>
<div class="wrap">
    <h2>BandCamp Integration</h2>
    <p>Options relating to the Custom Plugin.</p>
    <form method="post" action="options.php">
        <?php settings_fields('options'); ?>
        <?php do_settings_sections('bandcamp_integration'); ?>
        <p class="submit">
            <input type="submit" class="button-primary" value="<?php _e('Save Changes') ?>" />
        </p>
    </form>
</div>
<?php
    }

    // Add admin settings
    function admin_init() {
        register_setting( 'options', 'options', 'options_validate' );
        add_settings_section( 'main', 'Main Settings', 'main_callback', 'bandcamp_integration' );
        add_settings_field( 'api_key', 'BandCamp API Key', 'api_key_callback', 'bandcamp_integration', 'main' );
        add_settings_field( 'band_id', 'BandCamp Band ID', 'band_id_callback', 'bandcamp_integration', 'main' );
        add_settings_field( 'sync', 'Synchronise Data', 'sync_callback', 'bandcamp_integration', 'main' );
    }

    // Main Settings description
    function main_callback() {
        echo '<p>Main description of this section here.</p>';
    }

    // BandCamp API Key description
    function api_key_callback() {
        $options = get_option( 'options' );
        echo "<input id='bandcamp_api_key' name='options[api_key]' size='40' type='text' value='{$options['api_key']}' />";
        echo "<span class='description'>You may <a href='http://bandcamp.com/developer#key_request' target='_blank'>request an API key</a> if you do not have one.</span>";
    }

    // BandCamp Band ID description
    function band_id_callback() {
        $options = get_option( 'options' );
        echo "<input id='bandcamp_band_id' name='options[band_id]' size='40' type='text' value='{$options['band_id']}' />";
        echo '<span class="description">You may find your Band ID by <a href="http://api.bandcamp.com/api/band/3/search?key=<key>&name=band%20name&debug" target="_blank">querying BandCamp</a>.</span>';
    }

    // Synchronise Data description
    function sync_callback() {
        $options = get_option( 'options' );
        echo '<button type="button">Synchronise Data</button>';
        echo '<span class="description">Update local discography with data from BandCamp (unimplemented).</span>';
    }

    // Validate options
    function options_validate( $input ) {
        $options = get_option( 'options' );
        $options['api_key'] = trim( $input['api_key'] );
        if ( ! preg_match( '/^[a-z]{29}$/i', $options['api_key'] ) )
            $options['api_key'] = '';

        $options['band_id'] = trim( $input['band_id'] );
        if ( ! preg_match( '/^[0-9]{10}$/i', $options['band_id'] ) )
            $options['band_id'] = '';

        return $options;
    }
}
?>