class-frontend.php

<?php

/**
 * EAD_Frontend Class
 *
 * @since  1.0
 * @author Chris Christoff
 */
class EAD_Frontend {
	/**
	 * Constructor
	 *
	 * @since  1.0
	 * @return void
	 */
	public function __construct() {
		add_action( 'wp_dropdown_users', array( $this, 'ead_alter_dropdown_roles' ), 0, 1 );
	}

	/**
	 * Alter the default WordPress Users Dropdown
	 *
	 * @access public
	 * @param  string $output Altered HTML Output
	 * @since  1.0
	 */
	public function ead_alter_dropdown_roles( $output ) {
		global $post;

		if ( empty( $post ) ) 
			return false;

		// Strip out all whitespace
		$post_type_for_options = preg_replace( '/\s*/', '', $post->post_type );

		// Convert the string to all lowercase
		$post_type_for_options = strtolower( $post_type_for_options );

		// Return if we aren't using WPEAD on this post type :(
		$wpead_options = get_option( 'wpead_options' );

		$use_wpead_for_post_type = $wpead_options['wpead_use_for_'.$post_type_for_options];

		if ( ! $use_wpead_for_post_type ) 
			return $output;

		$this->ead_add_select2();

		$args = array(
			'selected' => $post->post_author,
			'id'       => 'post_author_override',
		);

		$output = $this->ead_author_selectbox( $args, $post_type_for_options, $wpead_options );

		return $output;
	}

	/**
	 * Add the select box for the user dropdown
	 *
	 * @param  array  $args
	 * @param  string $post_type_for_options
	 * @param  array  $wpead_options
	 * @return string $output HTML Output.
	 */
	public function ead_author_selectbox( $args, $post_type_for_options, $wpead_options ) {
		global $wp_roles, $post;

		$default_args = array(
			'placeholder',
			'id',
			'class',
		);

		foreach ( $default_args as $key ) {
			if ( ! is_array( $key ) && empty( $args[ $key ] ) )
				$args[ $key ] = '';
			else if ( is_array( $key ) )
				foreach ( $key as $val )
					$args[ $key ][ $val ] = esc_attr( $args[ $key ][ $val ] );
		}
		extract( $args );

		$roles = array();

		foreach ( $wp_roles->role_names as $role => $role_name ) {
			// Strip out all whitespace
			$role_name_for_options = preg_replace('/\s*/', '', $role_name);

			// Convert the string to all lowercase
			$role_name_for_options = strtolower( $role_name_for_options );

			$use_wpead_for_role = $wpead_options[ 'wpead_' . $post_type_for_options . '_for_' . $role_name_for_options ];

			if ( $use_wpead_for_role ){
				array_push( $roles, $role );
			}
		}

		$user_args = array( 'fields'  => array( 'ID', 'user_login' ) );

		// @TODO include current user not admin by default

		$output = "<select style='width:200px;' name='$id' id='$id' class='$class' data-placeholder='$placeholder'>\n";
		$output .= "\t<option value=''></option>\n";

		// We need to make sure we include the post author, even their role is excluded from the dropdown
		$author = new WP_User( $post->post_author );
		$author_role = $author->roles[0];

		// Strip out all whitespace
		$author_role = preg_replace('/\s*/', '', $author_role);

		// Convert the string to all lowercase
		$author_role = strtolower( $author_role );

		$isexcluded = $wpead_options[ 'wpead_' . $post_type_for_options . '_for_' . $author_role ];

		if ( ! $isexcluded ) {
			// OH NO! The user's role is excluded. Let's include them manually!
			$select = selected( $author->ID, $selected, false );
			$output .= "\t<option value='$author->ID' $select>$author->user_login</option>\n";
		}

		foreach ( $roles as $role ) {
			$new_args = $user_args;
			$new_args['role'] = $role;
			$users = get_users( $new_args );
			if ( empty( $users ) ) 
				continue;
			foreach ( (array) $users as $user ) {
				$select = selected( $user->ID, $selected, false );
				$output .= "\t<option value='$user->ID' $select>$user->user_login</option>\n";
			}
		}

		$output .= "</select>";
		$output .= '<script type="text/javascript">jQuery(function() {jQuery("#'.$id.'").select2();});</script>';

		return $output;
	}

	/**
	 * Register and enqueue Select2
	 *
	 * @since 1.0
	 */
	public function ead_add_select2() {
		wp_register_script( 'bootstrap-tooltip', EAD_ASSETS_URL . '/settings/assets/js/bootstrap-tooltip.js',   array( 'jquery' ), EAD_VERSION );
		wp_register_script( 'select2' ,          EAD_ASSETS_URL . '/settings/assets/js/select2/select2.min.js', array( 'jquery' ), EAD_VERSION );
		wp_register_script( 'sf-scripts' ,       EAD_ASSETS_URL . '/settings/assets/js/sf-jquery.js',           array( 'jquery' ), EAD_VERSION );

		wp_register_style( 'select2' ,           EAD_ASSETS_URL . '/settings/assets/js/select2/select2.css',    array(          ), EAD_VERSION );
		wp_register_style( 'sf-styles' ,         EAD_ASSETS_URL . '/settings/assets/css/sf-styles.css',         array(          ), EAD_VERSION );

		wp_enqueue_script( 'bootstrap-tooltip' );
		wp_enqueue_script( 'select2' );
		wp_enqueue_script( 'sf-scripts' );
		wp_enqueue_script( 'farbtastic' );

		wp_enqueue_style( 'select2' );
		wp_enqueue_style( 'sf-styles' );
		wp_enqueue_style( 'farbtastic' );
	}
}