<?php
/**
 * WP-Members API Functions
 * 
 * This file is part of the WP-Members plugin by Chad Butler
 * You can find out more about this plugin at https://rocketgeek.com
 * Copyright (c) 2006-2026  Chad Butler
 * WP-Members(tm) is a trademark of butlerblog.com
 *
 * @package WP-Members
 * @subpackage WP-Members API Functions
 * @author Chad Butler 
 * @copyright 2006-2026
 */

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
	exit();
}

/**
 * Redirects a user to defined login page with return redirect.
 *
 * While a specific URL can be passed as an argument, the default will
 * redirect the user back to the original page using wpmem_current_url().
 *
 * @since 3.0.2
 * @since 3.1.1 Moved to API.
 * @since 3.1.3 Added $redirect_to argument.
 *
 * @param string $redirect_to URL to redirect to (default: false).
 */
function wpmem_redirect_to_login( $redirect_to = false ) {
	if ( ! is_user_logged_in() ) {
		$redirect_to = ( $redirect_to ) ? $redirect_to : wpmem_current_url();
		wp_safe_redirect( wpmem_login_url( esc_url_raw( $redirect_to ) ) );
		exit();
	}
	return;
}

/**
 * Checks if content is blocked (replaces wpmem_block()).
 *
 * @since 3.1.1
 * @since 3.3.0 Added $post_id
 *
 * @global object $wpmem   The WP-Members object class.
 * @param  int    $post_id 
 * @return bool   $block   True if content is blocked, otherwise false.
 */
function wpmem_is_blocked( $post_id = false ) {
	global $wpmem;
	return $wpmem->is_blocked( $post_id );
}

/**
 * Checks if specific post is marked as hidden.
 *
 * @since 3.3.2
 *
 * @param  int    $post_id 
 * @return bool   $block   True if content is hidden, otherwise false.
 */
function wpmem_is_hidden( $post_id = false ) {
	return ( 2 == get_post_meta( $post_id, '_wpmem_block', true ) ) ? true : false;
}

/** 
 * Returns the block setting for a post.
 *
 * @since 3.3.0
 *
 * @global object $wpmem
 *
 * @param  int    $post_id
 * @return int    $block_value
 */
function wpmem_get_block_setting( $post_id ) {
	return get_post_meta( $post_id, '_wpmem_block', true );
}

/**
 * Gets a link to the login page with a return link redirect_to value.
 * 
 * @since 3.4.6
 * 
 * @param  array  $args {
 *     Additional attributes to be merged with defaults.
 * 
 *     @type  string  $tag  The HTML tag to be used (default: a)
 *     @type  array   $attributes {
 *         Any valid attributes for the HTML <a> tag.
 * 
 *         @type  string  $id
 *         @type  string  $class
 *         @type  string  $href
 *     }
 *     @type  string  $content  The text used with the <a href> tag
 * }
 */
function wpmem_get_login_link( $args = array() ) {
	$defaults = array(
		'tag' => 'a',
		'attributes' => array(
			'id'    => 'wpmem_login_link',
			'class' => 'wpmem-login-link',
			'href'  => wpmem_login_url( wpmem_current_url() ),
		),
		'content' => esc_html__( 'Log In' )
	);
	$args = rktgk_wp_parse_args( $args, $defaults );
	return rktgk_build_html_tag( $args );
}

/**
 * Echos a login link using wpmem_get_login_link().
 * 
 * @since 3.5.6
 */
function wpmem_login_link( $args = array() ) {
	echo wpmem_get_login_link( $args );
}

/**
 * Gets a link to the register page with a return link redirect_to value.
 * 
 * @since 3.4.6
 * 
 * @param  array  $args {
 *     Additional attributes to be merged with defaults.
 * 
 *     @type  string  $tag  The HTML tag to be used (default: a)
 *     @type  array   $attributes {
 *         Any valid attributes for the HTML <a> tag.
 * 
 *         @type  string  $id
 *         @type  string  $class
 *         @type  string  $href
 *     }
 *     @type  string  $content  The text used with the <a href> tag
 * }
 */
function wpmem_get_reg_link( $args = array() ) {
	$defaults = array(
		'tag' => 'a',
		'attributes' => array(
			'id'    => 'wpmem_reg_link',
			'class' => 'wpmem-reg-link',
			'href'  => add_query_arg( 'redirect_to', wpmem_current_url(), wpmem_register_url() ),
		),
		'content' => esc_html__( 'Register' )
	);
	$args = rktgk_wp_parse_args( $args, $defaults );
	return rktgk_build_html_tag( $args );
}

/**
 * Echos a login link using wpmem_get_reg_link().
 * 
 * @since 3.5.6
 */
function wpmem_reg_link( $args = array() ) {
	echo wpmem_get_reg_link( $args );
}

/**
 * Wrapper to get the login page location.
 *
 * @since 3.1.1
 * @since 3.1.2 Added redirect_to parameter.
 * @since 3.4.0 If no login page is set, return the wp_login_url().
 *
 * @global object $wpmem       The WP_Members object.
 * @param  string $redirect_to URL to return to (optional).
 * @return string $url         The login page url.
 */
function wpmem_login_url( $redirect_to = false ) {
	global $wpmem;
	// If no login page is set, get WP login url.
	$login_url = ( isset( $wpmem->user_pages['login'] ) ) ? $wpmem->user_pages['login'] : wp_login_url();
	/**
	 * Filter the login url.
	 * 
	 * @since 3.5.0
	 * 
	 * @param string $login_url
	 */
	$login_url = apply_filters( 'wpmem_login_url', $login_url );
	if ( $redirect_to ) {
		$url = add_query_arg( 'redirect_to', urlencode( $redirect_to ), $login_url );
	} else {
		$url = $login_url;
	}
	return esc_url_raw( $url );
}

/**
 * Wrapper to get the register page location.
 *
 * @since 3.1.1
 *
 * @global object $wpmem The WP_Members object.
 * @return string        The register page url.
 */
function wpmem_register_url() {
	global $wpmem;
	$reg_url = $wpmem->user_pages['register'];
	/**
	 * Filter the register url.
	 * 
	 * @since 3.5.0
	 * 
	 * @param string $reg_url
	 */
	return esc_url_raw( apply_filters( 'wpmem_register_url', $reg_url ) );
}

/**
 * Wrapper to get the profile page location.
 *
 * @since 3.1.1
 * @since 3.1.2 Added $a parameter.
 *
 * @global object $wpmem The WP_Members object.
 * @param  string $a     Action (optional).
 * @return string        The profile page url.
 */
function wpmem_profile_url( $a = false ) {
	global $wpmem;
	return ( $a ) ? add_query_arg( 'a', esc_attr( $a ), trailingslashit( $wpmem->user_pages['profile'] ) ) : $wpmem->user_pages['profile'];
}

/**
 * Alias of wpmem_profile_url() to return the password reset URL.
 * 
 * @since 3.4.5
 * 
 * @return string The password reset url.
 */
function wpmem_pwd_reset_url() {
	return wpmem_profile_url( 'pwdreset' );
}

/**
 * Alias of wpmem_profile_url() to return the forgot username URL.
 * 
 * @since 3.4.5
 * 
 * @return string The forgot username url.
 */
function wpmem_forgot_username_url() {
	return wpmem_profile_url( 'getusername' );
}

/**
 * Alias of wpmem_profile_url() to return the forgot username URL.
 * 
 * @since 3.5.0
 * 
 * @return string The resend confirmation url.
 */
function wpmem_reconfirm_url() {
	return wpmem_profile_url( 'reconfirm' );
}

/**
 * Returns an array of user pages.
 *
 * @since 3.1.2
 * @since 3.1.3 Added array keys.
 *
 * @return array $pages {
 *     The URLs of login, register, and user profile pages.
 *
 *     @type string $login
 *     @type string $register
 *     @type string $profile
 * }
 */
function wpmem_user_pages() {
	$pages = array( 
		'login'    => trailingslashit( wpmem_login_url() ), 
		'register' => trailingslashit( wpmem_register_url() ),
		'profile'  => trailingslashit( wpmem_profile_url() ),
	);
	return $pages;
}

/**
 * Returns the current full url.
 *
 * @since 3.1.1
 * @since 3.1.7 Added check for query string.
 * 
 * @global object  $wp
 * @param  boolean $slash Trailing slash the end of the url (default:true).
 * @param  boolean $getq  Toggles getting the query string (default:true).
 * @return string  $url   The current page full url path.
 */
function wpmem_current_url( $slash = true, $getq = true ) {
	global $wp;
	$url = home_url( add_query_arg( array(), $wp->request ) );
	$url = ( $slash ) ? trailingslashit( $url ) : $url;
	$url = ( $getq && count( $_GET ) > 0 ) ? $url . '?' . $_SERVER['QUERY_STRING'] : $url;
	return esc_url_raw( $url );
}

/**
 * Checks if the current page is the login page.
 * 
 * @since 3.5.0
 * 
 * @return boolean
 */
function wpmem_is_login() {
	return ( wpmem_login_url() == wpmem_current_url( true, false ) ) ? true : false;
}

/**
 * Checks if the current page is the register page.
 * 
 * @since 3.5.0
 * 
 * @return boolean
 */
function wpmem_is_register() {
	return ( wpmem_register_url() == wpmem_current_url( true, false ) ) ? true : false;
}

/**
 * Checks if the current page is the user profile page.
 * 
 * @since 3.5.0
 * 
 * @return boolean
 */
function wpmem_is_profile() {
	return ( wpmem_profile_url() == wpmem_current_url( true, false ) ) ? true : false;
}

/**
 * Gets post ID of current URL.
 *
 * @since 3.1.7
 *
 * @return int Post ID.
 */
function wpmem_current_post_id() {
	return url_to_postid( wpmem_current_url() );
}

/**
 * Returns or displays the user's login status.
 *
 * @since 2.0.0
 * @since 3.1.2 Moved to api.php, no longer pluggable.
 * @since 3.1.6 Dependencies now loaded by object.
 * @since 3.4.0 Added $tag for id'ing useage, to be passed through filter.
 *
 * @global string  $user_login
 * @param  boolean $echo       Determines whether function should print result or not (default: true).
 * @return string  $status     The user status string produced by wpmem_inc_memberlinks().
 */
function wpmem_login_status( $echo = true, $tag = false ) {
	if ( is_user_logged_in() ) {
		
		global $user_login;
		
		$args = array(
			'wrapper_before' => '<p>',
			'wrapper_after'  => '</p>',
			'user_login'     => $user_login,
			'welcome'        => wpmem_get_text( 'status_welcome' ),
			'logout_text'    => wpmem_get_text( 'status_logout' ),
			'logout_link'    => '<a href="' . esc_url( wpmem_logout_link() ) . '">%s</a>',
			'separator'      => ' | ',
		);
		/**
		 * Filter the status message parts.
		 *
		 * @since 2.9.9
		 * @since 3.4.0 Added $tag as a parameter (most often will be false).
		 *
		 * @param array $args {
		 *      The components of the links.
		 *
		 *      @type string $wrapper_before The wrapper opening tag (default: <p>).
		 *      @type string $wrapper_after  The wrapper closing tag (default: </p>).
		 *      @type string $user_login
		 *      @type string $welcome
		 *      @type string $logout_text
		 *      @type string $logout_link
		 *      @type string $separator
		 * }
		 * @param string $tag
		 */
		$args = apply_filters( 'wpmem_status_msg_args', $args, $tag );

		// Assemble the message string.
		$status = $args['wrapper_before']
			. sprintf( $args['welcome'], $args['user_login'] )
			. $args['separator']
			. sprintf( $args['logout_link'], $args['logout_text'] )
			. $args['wrapper_after'];
	}
	
	if ( $echo ) {
		echo $status; 
	} else {
		return $status;
	}
}

/**
 * Utility function to validate $_POST, $_GET, and $_REQUEST.
 *
 * While this function retrieves data, remember that the data should generally be
 * sanitized or escaped depending on how it is used.
 *
 * @since 3.1.3
 * @since 3.4.0 Now an alias for rktgk_get().
 *
 * @param  string $tag     The form field or query string.
 * @param  string $default The default value (optional).
 * @param  string $type    post|get|request (optional).
 * @return string 
 */
function wpmem_get( $tag, $default = '', $type = 'post' ) {
	return rktgk_get( $tag, $default, $type );
}

/**
 * Utility function to check if $_POST, $_GET, or $_REQUEST is valid, and sanitizes the result.
 *
 * @since 3.5.0
 *
 * @param  string $tag          Form field or query string param.
 * @param  string $default      Default value (optional, default: null).
 * @param  string $request_type Request type (post|get|request) (optional, default:post).
 * @param  string $field_type   Type of sanitization (using rktgk_sanitize_field()) (optional, default:text).
 * @return mixed  The sanitized result (string|array|integer|boolean).
 */
function wpmem_get_sanitized( $tag, $default = '', $request_type = 'post', $field_type = 'text' ) {
	return rktgk_get_sanitized( $tag, $default, $request_type, $field_type );
}

/**
 * Compares wpmem_reg_page value with the register page URL. 
 *
 * @since 3.1.4
 * @since 3.1.7 Added default of current page ID.
 *
 * @param  string|int $check_page
 * @return bool
 */
function wpmem_is_reg_page( $check = false ) {
	if ( ! $check ) {
		$check = get_the_ID();
	} else {
		if ( ! is_int( $check ) ) {
			global $wpdb;
			$sql   = 'SELECT ID FROM $wpdb->posts WHERE post_name = "' . esc_sql( $check ) . '" AND post_status = "publish" LIMIT 1';	
			$arr   = $wpdb->get_results( $sql, ARRAY_A  ); 
			$check = $arr[0]['ID'];
		}
	}
	$reg_page = wpmem_get( 'wpmem_reg_page' );
	$check_page = get_permalink( $check );
	return ( $check_page == $reg_page ) ? true : false;
}

/**
 * Creates a login/logout link.
 *
 * @since 3.1.6
 *
 * @param  array   $args {
 *     Array of arguments to customize output.
 *
 *     @type string  $login_redirect_to  The url to redirect to after login (optional).
 *     @type string  $logout_redirect_to The url to redirect to after logout (optional).
 *     @type string  $login_text         Text for the login link (optional).
 *     @type string  $logout_text        Text for the logout link (optional).
 * }
 * @param  boolean $echo (default: false)
 * @return string  $link
 */
function wpmem_loginout( $args = array(), $echo = false ) {
	global $wpmem;
	return $wpmem->loginout_args( $args );
}

/**
 * Returns a URL to log a user out.
 *
 * @since 3.4.0
 *
 * @return string Logout link.
 */
function wpmem_logout_link() {
	/**
	 * Filter the log out link.
	 *
	 * @since 2.8.3
	 *
	 * @param string The default logout link.
	 */
	return apply_filters( 'wpmem_logout_link', add_query_arg( 'a', 'logout' ) );
}

/**
 * Wrapper to return a string from the get_text function.
 *
 * @since 3.4.0
 *
 * @global object $wpmem The WP_Members object.
 * @param  string $str   The string to retrieve.
 * @param  bool   $echo  Print the string (default: false).
 * @return string $str   The localized string.
 */
function wpmem_get_text( $str, $echo = false ) {
	global $wpmem;
	if ( $echo ) {
		echo $wpmem->dialogs->get_text( $str );
	} else {
		return $wpmem->dialogs->get_text( $str );
	}
}

/**
 * Gets requested dialog.
 *
 * @since 3.4.0
 * 
 * @note It is being relased now as tentative.
 *       There may be some changes to how this is applied.
 *
 * @todo What about wpmem_use_custom_dialog()?
 *
 * @global stdClass $wpmem
 * @param  string   $tag
 * @param  string   $custom
 * @return
 */
function wpmem_get_display_message( $tag, $custom = false ) {
	global $wpmem;
	return $wpmem->dialogs->get_message( $tag, $custom );
}

/**
 * Dispalays requested dialog.
 * 
 * @note It is being relased now as tentative.
 *       There may be some changes to how this is applied.
 *
 * @since 3.2.0
 * @since 3.4.0 Now echos the message. Added $custom argument
 *
 * @todo What about wpmem_use_custom_dialog()?
 *
 * @global stdClass $wpmem
 * @param  string   $tag
 * @param  string   $custom
 * @return
 */
function wpmem_display_message( $tag, $custom = false ) {
	echo wpmem_get_display_message( $tag, $custom );
}

/**
 * Wrapper to use custom dialog.
 *
 * @since 3.1.1
 *
 * @param  array  $defaults Dialog message defaults from the wpmem_msg_defaults filter.
 * @param  string $tag      The dialog tag/name.
 * @param  array  $dialogs  The dialog settings array (passed through filter).
 * @return array  $dialogs  The dialog settings array (filtered).
 */
function wpmem_use_custom_dialog( $defaults, $tag, $dialogs ) {
	$msg_string = ( is_array( $dialogs[ $tag ] ) ) ? $dialogs[ $tag ]['value'] : $dialogs[ $tag ];
	$defaults['msg'] = esc_html__( $msg_string, 'wp-members' );
	return $defaults;
}

/**
 * Wrapper function for adding custom dialogs.
 *
 * @since 3.1.1
 * @since 3.3.0 Moved to main API.
 *
 * @param  array  $dialogs Dialog settings array.
 * @param  string $tag     Slug for dialog to be added.
 * @param  string $msg     The dialog message.
 * @param  string $label   Label for admin panel.
 * @return array  $dialogs Dialog settings array with prepped custom dialog added.
 */
function wpmem_add_custom_dialog( $dialogs, $tag, $msg, $label ) {
	$msg = ( ! isset( $dialogs[ $tag ] ) ) ? $msg : $dialogs[ $tag ];
	$dialogs[ $tag ] = array(
		'name'  => $tag,
		'label' => $label,
		'value' => $msg,
	);
	return $dialogs;
}

/**
 * Gets an array of hidden post IDs.
 *
 * @since 3.3.1
 *
 * @global stdClass $wpmem
 * @return array
 */
function wpmem_get_hidden_posts() {
	global $wpmem;
	return $wpmem->get_hidden_posts();
}

/**
 * Updates the hiddent posts array.
 *
 * @since 3.3.5
 *
 * @global stdClass $wpmem
 */
function wpmem_update_hidden_posts() {
	global $wpmem;
	$wpmem->update_hidden_posts();
}

/**
 * Conditional if REST request.
 *
 * @since 3.3.2
 *
 * @global stdClass $wpmem
 * @return boolean
 */
function wpmem_is_rest() {
	global $wpmem;
	return $wpmem->is_rest;
}

/**
 * Gets registration type.
 *
 * @since 3.3.5
 * @since 3.5.1 Checks is_reg_type().
 *
 * @global  stdClass  $wpmem
 * @param   string    $type (wpmem|native|add_new|woo|woo_checkout)
 * @return  boolean
 */
function wpmem_is_reg_type( $type ) {
	global $wpmem;
	return $wpmem->user->is_reg_type( $type );
}

/**
 * Displays the post restricted message.
 *
 * @since 3.4.0
 *
 * @return string
 */
function wpmem_restricted_message() {
	global $wpmem;
	return $wpmem->forms->add_restricted_msg();
}

/**
 * Gets plugin url.
 * 
 * @since 3.4.1
 * 
 * @global stdClass $wpmem
 * @return string   $wpmem->url
 */
function wpmem_get_plugin_url() {
	global $wpmem;
	return $wpmem->url;
}

/**
 * Gets plugin version.
 * 
 * @since 3.4.1
 * 
 * @global stdClass $wpmem
 * @return string   $wpmem->version
 */
function wpmem_get_plugin_version() {
	global $wpmem;
	return $wpmem->version;
}

/**
 * Checks whether a WooCommerce product is purchasable.
 * 
 * If a product is blocked or requires a membership, this function
 * will return false if the user lacks the wpmem criteria to access.
 * 
 * @since 3.4.7
 * 
 * @param  boolean  $is_purchasable
 * @param  object   $product         The WooCommerce product object.
 */
function wpmem_woo_is_purchasable( $is_purchasable, $product ) {

	// Is the product restricted?
	if ( wpmem_is_blocked( $product->get_id() ) ) {

		// If it's restricted and the user is not logged in, return false (not purchasable by this user).
		if ( ! is_user_logged_in() ) {
			return false;
		}

		// Does the product have a membership requirement?
		$membership_required = wpmem_get_post_memberships( $product->get_id() );
		// If not, it's purchasable.
		if ( false == $membership_required ) {
			return true;
		} else {
			// If a membership is required, does the user have access?  If not, return false (not purchasable by this user).
			if ( ! wpmem_user_has_access( $membership_required ) ) {
				return false;
			}
		}
	}

	return true;
}

/**
 * Display an icon or text indicating the restriction value of a post for logged out users.
 * 
 * @note Make sure dashicons are loaded if $icon is true.
 * 
 * @since 3.5.0
 * 
 * @param  int   $post_id
 * @param  bool  $icon
 * @param  bool  $echo
 * @return bool
 */
function wpmem_show_post_restriction( $post_id, $icon = false, $echo = false ) {

	$defaults = array( 
		'open_icon' => '<span class="dashicons dashicons-lock"></span>',
		'open_text' => '[ members only ]',
		'restricted_icon' => '<span class="dashicons dashicons-unlock"></span>',
		'restricted_text' => '[ free ]',
	);
	$filtered = apply_filters( 'wpmem_show_post_restriction_args', $defaults, $post_id );
	$args = wp_parse_args( $filtered, $defaults );

    if ( ! is_user_logged_in() ) {
        
        if ( wpmem_is_blocked( $post_id ) ) {

            $result = ( $icon ) ?  $args['restricted_icon'] : $args['restricted_text'];

        } else {

            $result = ( $icon ) ? $args['open_icon'] : $args['open_text'];

        }

        if ( $echo ) {
            echo $result;
        } else {
            return $result;
        }
    }
}

/**
 * Checks if the WP-Members PayPal extension is activated.
 * 
 * @since 3.5.5
 * 
 * @return boolean
 */
function wpmem_is_exp_enabled() {
	return ( function_exists( 'wpmem_exp_init' ) || function_exists( 'wpmem_set_exp' ) ) ? true : false;
}
// End of file.