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| 1 | <?php |
| 2 | /** |
| 3 | * -- License -- |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License along |
| 15 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 17 | * http://www.gnu.org/copyleft/gpl.html |
| 18 | * |
| 19 | * @file |
| 20 | */ |
| 21 | |
| 22 | use MediaWiki\MediaWikiServices; |
| 23 | |
| 24 | /** |
| 25 | * Class that prepares an XML transaction and executes it. Right now it's probably way specific |
| 26 | * to the SilverPop method. Hopefully easy to extend if required? |
| 27 | */ |
| 28 | class XmlTransactionProcessor { |
| 29 | |
| 30 | /** @var array[] */ |
| 31 | private $mTransactionMap = []; |
| 32 | /** @var array */ |
| 33 | private $mEnvelope = []; |
| 34 | /** @var string|int */ |
| 35 | private $mTimeout = 'default'; |
| 36 | /** @var string */ |
| 37 | private $mURL = ''; |
| 38 | |
| 39 | /** |
| 40 | * Set the remote server we will be connecting too |
| 41 | * @param string $url |
| 42 | */ |
| 43 | public function setEndpointURL( $url ) { |
| 44 | $this->mURL = $url; |
| 45 | } |
| 46 | |
| 47 | /** |
| 48 | * Maximum cURL operation time |
| 49 | * @param int $timeout |
| 50 | */ |
| 51 | public function setTimeout( $timeout ) { |
| 52 | $this->mTimeout = $timeout; |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * The transaction map is an array, keyed on transaction name. Each node should have two |
| 57 | * leaves: 'in' and 'out'. Out should be an array of 'key' which is the XML node name, and 'value' |
| 58 | * which is the name of the key in the data structure passed to doTransaction(). 'In' should |
| 59 | * be a function name that will process the return data. The 'in' function will be called in |
| 60 | * the context of a callbackObj - see doTransaction(). |
| 61 | * |
| 62 | * In functions should accept three arguments: |
| 63 | * - string : Transaction name |
| 64 | * - DOMDocument : The returned XML object |
| 65 | * - this : In case the function needs to modify this processor object |
| 66 | * |
| 67 | * @param array[] $map |
| 68 | */ |
| 69 | public function setTransactionMap( array $map ) { |
| 70 | $this->mTransactionMap = $map; |
| 71 | } |
| 72 | |
| 73 | /** |
| 74 | * Wrap the output XML in more nodes! Each entry in the envelope is a new wrapping element. |
| 75 | * @param array $envelope |
| 76 | */ |
| 77 | public function setEnvelope( array $envelope ) { |
| 78 | $this->mEnvelope = $envelope; |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * Performs an XML transaction! |
| 83 | * |
| 84 | * @param string $txnName Name of transaction in transaction map |
| 85 | * @param mixed $callbackObj Reference to class that holds the callback function |
| 86 | * @param array $outParams Map of parameter data |
| 87 | * |
| 88 | * @return bool If true, the transaction was completely successful. |
| 89 | */ |
| 90 | public function doTransaction( $txnName, $callbackObj, $outParams = [] ) { |
| 91 | global $wgFundraisingEmailUnsubscribeLogXmlTransactions; |
| 92 | |
| 93 | Logger::pushLabel( 'XMLTransaction' ); |
| 94 | $retval = false; |
| 95 | |
| 96 | // Brief sanity check |
| 97 | if ( !array_key_exists( $txnName, $this->mTransactionMap ) ) { |
| 98 | Logger::log( "Transaction '$txnName' does not exist in map!", LOG_ERR, 'XMLTransaction' ); |
| 99 | |
| 100 | // And a further check to ensure that the processing callback function does exist |
| 101 | } elseif ( !method_exists( $callbackObj, $this->mTransactionMap[$txnName]['in'] ) ) { |
| 102 | $errstr = "Transaction '$txnName' specifies callback function that does not exist in provided object!"; |
| 103 | Logger::log( $errstr, LOG_ERR, 'XMLTransaction' ); |
| 104 | throw new MWException( $errstr ); |
| 105 | |
| 106 | // We're sane; process the data |
| 107 | } else { |
| 108 | // Construct the DOM tree |
| 109 | $dom = new DOMDocument( '1.0', 'utf-8' ); |
| 110 | $root = $dom; |
| 111 | |
| 112 | foreach ( $this->mEnvelope as $element ) { |
| 113 | $el = new DOMElement( $element ); |
| 114 | $root->appendChild( $el ); |
| 115 | $root = $el; |
| 116 | } |
| 117 | $el = new DOMElement( $txnName ); |
| 118 | $root->appendChild( $el ); |
| 119 | $root = $el; |
| 120 | |
| 121 | $this->constructDomFromArray( $this->mTransactionMap[$txnName]['out'], $outParams, $root ); |
| 122 | |
| 123 | // Send it! |
| 124 | Logger::log( "Sending transaction '$txnName'" ); |
| 125 | if ( $wgFundraisingEmailUnsubscribeLogXmlTransactions ) { |
| 126 | Logger::log( "Transaction content: " . $dom->saveXML() ); |
| 127 | } |
| 128 | $retData = $this->doHttpTransaction( $dom->saveXML(), $this->mTimeout ); |
| 129 | |
| 130 | // Call the processing hook if everything was OK |
| 131 | $retDOM = new DOMDocument(); |
| 132 | if ( ( $retData != false ) && ( $retDOM->loadXML( $retData ) ) ) { |
| 133 | $function = $this->mTransactionMap[$txnName]['in']; |
| 134 | $retval = $callbackObj->$function( $txnName, $retDOM, $this ); |
| 135 | } else { |
| 136 | Logger::log( "Server did not return useful content: " . json_encode( $retData ) ); |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | Logger::popLabel(); |
| 141 | return $retval; |
| 142 | } |
| 143 | |
| 144 | /** |
| 145 | * Helper function which will create a DOM tree based on an array tree. Will lookup key data |
| 146 | * in the $data array. |
| 147 | * |
| 148 | * @param array $domArray The starting DOM array -- which is not a DOM object |
| 149 | * @param array $data The source parameter data |
| 150 | * @param DOMElement|DOMNode &$dom The resulting DOM object |
| 151 | * |
| 152 | * @throws MWException |
| 153 | */ |
| 154 | protected function constructDomFromArray( array $domArray, $data, &$dom ) { |
| 155 | foreach ( $domArray as $element => $value ) { |
| 156 | if ( is_array( $value ) ) { |
| 157 | $el = new DOMElement( $element ); |
| 158 | $this->constructDomFromArray( $value, $data, $el ); |
| 159 | } else { |
| 160 | if ( array_key_exists( $value, $data ) ) { |
| 161 | $el = new DOMElement( $element, (string)$data[$value] ); |
| 162 | } else { |
| 163 | throw new MWException( "Data key '$value' does not exist! Node '$element' cannot be created." ); |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | $dom->appendChild( $el ); |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | /** |
| 172 | * Actually perform the HTTP transaction. |
| 173 | * |
| 174 | * @param string|array $data |
| 175 | * @param string $timeout |
| 176 | * |
| 177 | * @return bool|string |
| 178 | */ |
| 179 | protected function doHttpTransaction( $data, $timeout = 'default' ) { |
| 180 | $options['method'] = 'POST'; |
| 181 | $options['timeout'] = $this->mTimeout; |
| 182 | |
| 183 | $req = MediaWikiServices::getInstance()->getHttpRequestFactory() |
| 184 | ->create( $this->mURL, $options ); |
| 185 | if ( !is_array( $data ) ) { |
| 186 | $req->setHeader( 'Content-Type', 'text/xml; charset=utf8' ); |
| 187 | $req->setHeader( 'Content-Length', strlen( $data ) ); |
| 188 | } |
| 189 | $req->setData( $data ); |
| 190 | $status = $req->execute(); |
| 191 | |
| 192 | if ( $status->isOK() ) { |
| 193 | return $req->getContent(); |
| 194 | } else { |
| 195 | $errors = json_encode( [ 'curl' => $status->errors, 'request' => $req->status->getErrorsArray() ] ); |
| 196 | Logger::log( "Communications failed with : $errors", LOG_ERR, 'XMLTransaction' ); |
| 197 | return false; |
| 198 | } |
| 199 | } |
| 200 | } |