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<?php

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if ( ! class_exists( 'ET_Core_API_ElegantThemes' ) ):

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/**

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* Handles communication with the main ET API.

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* @since 3.10

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* @private

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* @package ET\Core\API

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class ET_Core_API_ElegantThemes {

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/**

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* Base API URL.

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* @var string

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protected $api_url = 'https://www.elegantthemes.com/api/';

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/**

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* API username.

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* @var string

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protected $username = '';

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/**

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* API key.

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* @var string

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protected $api_key = '';

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/**

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* ET_Core_API_Client constructor.

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* @since 3.10

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* @param string $username

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* @param string $api_key

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* @param string $api

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public function __construct( $username, $api_key ) {

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$this->username = sanitize_text_field( $username );

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$this->api_key = sanitize_text_field( $api_key );

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}

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/**

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* Decorate a payload array with common data.

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* @since 3.10

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* @param array $payload

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* @return array

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protected function _get_decorated_payload( $payload ) {

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if ( ! isset( $payload['username'] ) ) {

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$payload['username'] = $this->username;

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}

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if ( ! isset( $payload['api_key'] ) ) {

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$payload['api_key'] = $this->api_key;

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}

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return $payload;

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}

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/**

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* Decorate request options array with common options.

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* @since 3.10

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* @param array $options

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* @return array

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protected function _get_decorated_request_options( $options = array() ) {

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global $wp_version;

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$options = array_merge( array(

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'timeout' => 30,

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'user-agent' => 'WordPress/' . $wp_version . '; ' . home_url( '/' ),

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), $options );

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return $options;

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}

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/**

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* Parse a response from the API.

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* @since 3.10

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* @param array|WP_Error $response

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* @return object|WP_Error

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protected function _parse_response( $response ) {

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if ( is_wp_error( $response ) ) {

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return $response;

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}

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$response_body = trim( wp_remote_retrieve_body( $response ) );

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if ( '' === $response_body ) {

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return new WP_Error( 'et_unknown', esc_html__( 'An unknown error has occurred. Please try again later.', 'et-core' ) );

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}

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$credentials_errors = array(

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'Username is not set.',

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'Subscription is not active',

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);

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if ( in_array( $response_body, $credentials_errors ) ) {

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return new WP_Error( 'et_invalid_api_credentials', esc_html__( 'Invalid Username and/or API Key provided.', 'et-core' ) );

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}

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return maybe_unserialize( $response_body );

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}

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/**

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* Get the full API endpoint.

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* @since 3.10

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* @param string $endpoint "api" or "api_downloads"

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* @return string

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protected function _get_endpoint( $endpoint = 'api' ) {

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$allowed_endpoints = array( 'api', 'api_downloads' );

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$suffix = '.php';

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if ( ! in_array( $endpoint, $allowed_endpoints ) ) {

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$endpoint = $allowed_endpoints[0];

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}

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return esc_url_raw( $this->api_url . $endpoint . $suffix );

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}

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/**

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* Submit a GET request to the API.

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* @since 3.10

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* @param array $payload

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* @param string $endpoint

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* @return object|WP_Error

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protected function _get( $payload, $endpoint = 'api' ) {

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$payload = $this->_get_decorated_payload( $payload );

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$options = $this->_get_decorated_request_options();

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$url = esc_url_raw( add_query_arg( $payload, $this->_get_endpoint( $endpoint ) ) );

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$response = wp_remote_get( $url, $options );

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return $this->_parse_response( $response );

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}

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/**

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* Submit a POST request to the API.

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* @since 3.10

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* @param array $payload

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* @param string $endpoint

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* @return object|WP_Error

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protected function _post( $payload, $endpoint = 'api' ) {

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$payload = $this->_get_decorated_payload( $payload );

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$options = $this->_get_decorated_request_options( array(

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'body' => $payload,

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) );

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$response = wp_remote_post( $this->_get_endpoint( $endpoint ), $options );

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return $this->_parse_response( $response );

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}

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/**

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* Check if a product is available.

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* @since 3.10

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* @param string $product_name

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* @param string $version

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* @return bool|WP_Error

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public function is_product_available( $product_name, $version ) {

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$response = $this->_get( array(

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'api_update' => 1,

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'action' => 'check_version_status',

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'product' => $product_name,

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'version' => $version,

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) );

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if ( is_wp_error( $response ) ) {

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return $response;

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}

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if ( ! is_array( $response ) ) {

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return new WP_Error( 'et_unknown', esc_html__( 'An unexpected response was received from the version server. Please try again later.', 'et-core' ) );

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}

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switch ( $response['status'] ) {

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case 'not_available':

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return new WP_Error( 'et_version_rollback_not_available', sprintf(

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esc_html__( 'The previously used version of %1$s does not support version rollback.', 'et-core' ),

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esc_html( $product_name )

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) );

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case 'blocklisted':

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return new WP_Error( 'et_version_rollback_blocklisted', et_get_safe_localization( sprintf(

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__( 'For privacy and security reasons, you cannot rollback to <strong>Version %1$s</strong>.', 'et-core' ),

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esc_html( $version )

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) ) );

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case 'available':

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return true;

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}

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return new WP_Error( 'et_unknown', esc_html__( 'An unknown error has occurred. Please try again later.', 'et-core' ) );

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}

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/**

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* Get a product download url for a specific version, if available.

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* @since 3.10

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* @param string $product_name

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* @param string $version

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* @return string|WP_Error

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public function get_download_url( $product_name, $version ) {

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$payload = $this->_get_decorated_payload( array(

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'api_update' => 1,

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'theme' => $product_name,

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'version' => $version,

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) );

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return esc_url_raw( add_query_arg( $payload, $this->_get_endpoint( 'api_downloads' ) ) );

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}

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}

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endif;

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