5 ) { wfDebugLog( 'XMP', __METHOD__ . " Rating too high, setting to 5" ); $val = '5'; return; } } } /** * function to validate integers * * @param array $info information about current property * @param &$val Mixed current value to validate * @param $standalone Boolean if this is a simple property or array */ public static function validateInteger( $info, &$val, $standalone ) { if ( !$standalone ) { // this only validates standalone properties, not arrays, etc return; } if ( !preg_match( '/^[-+]?\d+$/D', $val ) ) { wfDebugLog( 'XMP', __METHOD__ . " Expected integer but got $val" ); $val = null; } } /** * function to validate properties with a fixed number of allowed * choices. (closed choice) * * @param array $info information about current property * @param &$val Mixed current value to validate * @param $standalone Boolean if this is a simple property or array */ public static function validateClosed( $info, &$val, $standalone ) { if ( !$standalone ) { // this only validates standalone properties, not arrays, etc return; } //check if its in a numeric range $inRange = false; if ( isset( $info['rangeLow'] ) && isset( $info['rangeHigh'] ) && is_numeric( $val ) && ( intval( $val ) <= $info['rangeHigh'] ) && ( intval( $val ) >= $info['rangeLow'] ) ) { $inRange = true; } if ( !isset( $info['choices'][$val] ) && !$inRange ) { wfDebugLog( 'XMP', __METHOD__ . " Expected closed choice, but got $val" ); $val = null; } } /** * function to validate and modify flash structure * * @param array $info information about current property * @param &$val Mixed current value to validate * @param $standalone Boolean if this is a simple property or array */ public static function validateFlash( $info, &$val, $standalone ) { if ( $standalone ) { // this only validates flash structs, not individual properties return; } if ( !( isset( $val['Fired'] ) && isset( $val['Function'] ) && isset( $val['Mode'] ) && isset( $val['RedEyeMode'] ) && isset( $val['Return'] ) ) ) { wfDebugLog( 'XMP', __METHOD__ . " Flash structure did not have all the required components" ); $val = null; } else { $val = ( "\0" | ( $val['Fired'] === 'True' ) | ( intval( $val['Return'] ) << 1 ) | ( intval( $val['Mode'] ) << 3 ) | ( ( $val['Function'] === 'True' ) << 5 ) | ( ( $val['RedEyeMode'] === 'True' ) << 6 ) ); } } /** * function to validate LangCode properties ( en-GB, etc ) * * This is just a naive check to make sure it somewhat looks like a lang code. * * @see rfc 3066 * @see http://www.adobe.com/devnet/xmp/pdfs/XMPSpecificationPart1.pdf page 30 (section 8.2.2.5) * * @param array $info information about current property * @param &$val Mixed current value to validate * @param $standalone Boolean if this is a simple property or array */ public static function validateLangCode( $info, &$val, $standalone ) { if ( !$standalone ) { // this only validates standalone properties, not arrays, etc return; } if ( !preg_match( '/^[-A-Za-z0-9]{2,}$/D', $val ) ) { //this is a rather naive check. wfDebugLog( 'XMP', __METHOD__ . " Expected Lang code but got $val" ); $val = null; } } /** * function to validate date properties, and convert to (partial) Exif format. * * Dates can be one of the following formats: * YYYY * YYYY-MM * YYYY-MM-DD * YYYY-MM-DDThh:mmTZD * YYYY-MM-DDThh:mm:ssTZD * YYYY-MM-DDThh:mm:ss.sTZD * * @param array $info information about current property * @param &$val Mixed current value to validate. Converts to TS_EXIF as a side-effect. * in cases where there's only a partial date, it will give things like * 2011:04. * @param $standalone Boolean if this is a simple property or array */ public static function validateDate( $info, &$val, $standalone ) { if ( !$standalone ) { // this only validates standalone properties, not arrays, etc return; } $res = array(); if ( !preg_match( /* ahh! scary regex... */ '/^([0-3]\d{3})(?:-([01]\d)(?:-([0-3]\d)(?:T([0-2]\d):([0-6]\d)(?::([0-6]\d)(?:\.\d+)?)?([-+]\d{2}:\d{2}|Z)?)?)?)?$/D', $val, $res ) ) { wfDebugLog( 'XMP', __METHOD__ . " Expected date but got $val" ); $val = null; } else { /* * $res is formatted as follows: * 0 -> full date. * 1 -> year, 2-> month, 3-> day, 4-> hour, 5-> minute, 6->second * 7-> Timezone specifier (Z or something like +12:30 ) * many parts are optional, some aren't. For example if you specify * minute, you must specify hour, day, month, and year but not second or TZ. */ /* * First of all, if year = 0000, Something is wrongish, * so don't extract. This seems to happen when * some programs convert between metadata formats. */ if ( $res[1] === '0000' ) { wfDebugLog( 'XMP', __METHOD__ . " Invalid date (year 0): $val" ); $val = null; return; } if ( !isset( $res[4] ) ) { //hour //just have the year month day (if that) $val = $res[1]; if ( isset( $res[2] ) ) { $val .= ':' . $res[2]; } if ( isset( $res[3] ) ) { $val .= ':' . $res[3]; } return; } if ( !isset( $res[7] ) || $res[7] === 'Z' ) { //if hour is set, then minute must also be or regex above will fail. $val = $res[1] . ':' . $res[2] . ':' . $res[3] . ' ' . $res[4] . ':' . $res[5]; if ( isset( $res[6] ) && $res[6] !== '' ) { $val .= ':' . $res[6]; } return; } // Extra check for empty string necessary due to TZ but no second case. $stripSeconds = false; if ( !isset( $res[6] ) || $res[6] === '' ) { $res[6] = '00'; $stripSeconds = true; } // Do timezone processing. We've already done the case that tz = Z. // We know that if we got to this step, year, month day hour and min must be set // by virtue of regex not failing. $unix = wfTimestamp( TS_UNIX, $res[1] . $res[2] . $res[3] . $res[4] . $res[5] . $res[6] ); $offset = intval( substr( $res[7], 1, 2 ) ) * 60 * 60; $offset += intval( substr( $res[7], 4, 2 ) ) * 60; if ( substr( $res[7], 0, 1 ) === '-' ) { $offset = -$offset; } $val = wfTimestamp( TS_EXIF, $unix + $offset ); if ( $stripSeconds ) { // If seconds weren't specified, remove the trailing ':00'. $val = substr( $val, 0, -3 ); } } } /** function to validate, and more importantly * translate the XMP DMS form of gps coords to * the decimal form we use. * * @see http://www.adobe.com/devnet/xmp/pdfs/XMPSpecificationPart2.pdf * section 1.2.7.4 on page 23 * * @param array $info unused (info about prop) * @param &$val String GPS string in either DDD,MM,SSk or * or DDD,MM.mmk form * @param $standalone Boolean if its a simple prop (should always be true) */ public static function validateGPS( $info, &$val, $standalone ) { if ( !$standalone ) { return; } $m = array(); if ( preg_match( '/(\d{1,3}),(\d{1,2}),(\d{1,2})([NWSE])/D', $val, $m ) ) { $coord = intval( $m[1] ); $coord += intval( $m[2] ) * ( 1 / 60 ); $coord += intval( $m[3] ) * ( 1 / 3600 ); if ( $m[4] === 'S' || $m[4] === 'W' ) { $coord = -$coord; } $val = $coord; return; } elseif ( preg_match( '/(\d{1,3}),(\d{1,2}(?:.\d*)?)([NWSE])/D', $val, $m ) ) { $coord = intval( $m[1] ); $coord += floatval( $m[2] ) * ( 1 / 60 ); if ( $m[3] === 'S' || $m[3] === 'W' ) { $coord = -$coord; } $val = $coord; return; } else { wfDebugLog( 'XMP', __METHOD__ . " Expected GPSCoordinate, but got $val." ); $val = null; return; } } }