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<?php

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/**

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* Licensed under the GPL v2 (the "License"); you may

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* not use this file except in compliance with the License. You may obtain

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* a copy of the License at

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* http://choosealicense.com/licenses/gpl-v2/

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* Unless required by applicable law or agreed to in writing, software

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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT

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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the

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* License for the specific language governing permissions and limitations

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* under the License.

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if ( ! defined( 'ABSPATH' ) ) {

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exit;

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}

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if ( ! defined( 'FS_API__VERSION' ) ) {

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define( 'FS_API__VERSION', '1' );

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}

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if ( ! defined( 'FS_SDK__PATH' ) ) {

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define( 'FS_SDK__PATH', dirname( __FILE__ ) );

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}

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if ( ! defined( 'FS_SDK__EXCEPTIONS_PATH' ) ) {

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define( 'FS_SDK__EXCEPTIONS_PATH', FS_SDK__PATH . '/Exceptions/' );

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}

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if ( ! function_exists( 'json_decode' ) ) {

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throw new Exception( 'Freemius needs the JSON PHP extension.' );

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}

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// Include all exception files.

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$exceptions = array(

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'Exception',

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'InvalidArgumentException',

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'ArgumentNotExistException',

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'EmptyArgumentException',

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'OAuthException'

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);

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foreach ( $exceptions as $e ) {

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require_once FS_SDK__EXCEPTIONS_PATH . $e . '.php';

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}

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if ( ! class_exists( 'Freemius_Api_Base' ) ) {

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abstract class Freemius_Api_Base {

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const VERSION = '1.0.4';

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const FORMAT = 'json';

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protected $_id;

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protected $_public;

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protected $_secret;

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protected $_scope;

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protected $_isSandbox;

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/**

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* @param string $pScope 'app', 'developer', 'plugin', 'user' or 'install'.

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* @param number $pID Element's id.

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* @param string $pPublic Public key.

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* @param string $pSecret Element's secret key.

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* @param bool $pIsSandbox Whether or not to run API in sandbox mode.

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public function Init( $pScope, $pID, $pPublic, $pSecret, $pIsSandbox = false ) {

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$this->_id = $pID;

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$this->_public = $pPublic;

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$this->_secret = $pSecret;

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$this->_scope = $pScope;

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$this->_isSandbox = $pIsSandbox;

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}

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public function IsSandbox() {

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return $this->_isSandbox;

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}

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function CanonizePath( $pPath ) {

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$pPath = trim( $pPath, '/' );

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$query_pos = strpos( $pPath, '?' );

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$query = '';

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if ( false !== $query_pos ) {

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$query = substr( $pPath, $query_pos );

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$pPath = substr( $pPath, 0, $query_pos );

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}

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// Trim '.json' suffix.

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$format_length = strlen( '.' . self::FORMAT );

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$start = $format_length * ( - 1 ); //negative

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if ( substr( strtolower( $pPath ), $start ) === ( '.' . self::FORMAT ) ) {

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$pPath = substr( $pPath, 0, strlen( $pPath ) - $format_length );

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}

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switch ( $this->_scope ) {

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case 'app':

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$base = '/apps/' . $this->_id;

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break;

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case 'developer':

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$base = '/developers/' . $this->_id;

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break;

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case 'user':

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$base = '/users/' . $this->_id;

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break;

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case 'plugin':

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$base = '/plugins/' . $this->_id;

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break;

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case 'install':

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$base = '/installs/' . $this->_id;

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break;

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default:

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throw new Freemius_Exception( 'Scope not implemented.' );

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}

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return '/v' . FS_API__VERSION . $base .

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( ! empty( $pPath ) ? '/' : '' ) . $pPath .

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( ( false === strpos( $pPath, '.' ) ) ? '.' . self::FORMAT : '' ) . $query;

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}

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abstract function MakeRequest( $pCanonizedPath, $pMethod = 'GET', $pParams = array() );

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/**

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* @param string $pPath

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* @param string $pMethod

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* @param array $pParams

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* @return object[]|object|null

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private function _Api( $pPath, $pMethod = 'GET', $pParams = array() ) {

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$pMethod = strtoupper( $pMethod );

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try {

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$result = $this->MakeRequest( $pPath, $pMethod, $pParams );

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} catch ( Freemius_Exception $e ) {

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// Map to error object.

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$result = (object) $e->getResult();

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} catch ( Exception $e ) {

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// Map to error object.

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$result = (object) array(

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'error' => (object) array(

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'type' => 'Unknown',

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'message' => $e->getMessage() . ' (' . $e->getFile() . ': ' . $e->getLine() . ')',

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'code' => 'unknown',

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'http' => 402

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)

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);

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}

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return $result;

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}

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public function Api( $pPath, $pMethod = 'GET', $pParams = array() ) {

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return $this->_Api( $this->CanonizePath( $pPath ), $pMethod, $pParams );

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}

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/**

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* Base64 decoding that does not need to be urldecode()-ed.

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* Exactly the same as PHP base64 encode except it uses

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* `-` instead of `+`

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* `_` instead of `/`

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* No padded =

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* @param string $input Base64UrlEncoded() string

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* @return string

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protected static function Base64UrlDecode( $input ) {

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/**

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* IMPORTANT NOTE:

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* This is a hack suggested by @otto42 and @greenshady from

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* the theme's review team. The usage of base64 for API

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* signature encoding was approved in a Slack meeting

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* held on Tue (10/25 2016).

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* @todo Remove this hack once the base64 error is removed from the Theme Check.

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* @since 1.2.2

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* @author Vova Feldman (@svovaf)

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$fn = 'base64' . '_decode';

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return $fn( strtr( $input, '-_', '+/' ) );

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}

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/**

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* Base64 encoding that does not need to be urlencode()ed.

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* Exactly the same as base64 encode except it uses

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* `-` instead of `+

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* `_` instead of `/`

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* @param string $input string

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* @return string Base64 encoded string

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protected static function Base64UrlEncode( $input ) {

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/**

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* IMPORTANT NOTE:

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* This is a hack suggested by @otto42 and @greenshady from

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* the theme's review team. The usage of base64 for API

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* signature encoding was approved in a Slack meeting

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* held on Tue (10/25 2016).

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* @todo Remove this hack once the base64 error is removed from the Theme Check.

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* @since 1.2.2

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* @author Vova Feldman (@svovaf)

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$fn = 'base64' . '_encode';

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$str = strtr( $fn( $input ), '+/', '-_' );

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$str = str_replace( '=', '', $str );

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return $str;

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}

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}

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}

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