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UserAgentClientHintsFormatter.php
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UserAgentClientHintsFormatter.php
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<?php
namespace MediaWiki\CheckUser\Services;
use MediaWiki\CheckUser\ClientHints\ClientHintsBatchFormatterResults;
use MediaWiki\CheckUser\ClientHints\ClientHintsData;
use MediaWiki\CheckUser\ClientHints\ClientHintsLookupResults;
use MediaWiki\Config\ServiceOptions;
use MessageLocalizer;
/**
* A service that formats ClientHintsData objects into a human-readable
* string format.
*/
class UserAgentClientHintsFormatter {
public const CONSTRUCTOR_OPTIONS = [
'CheckUserClientHintsForDisplay',
'CheckUserClientHintsValuesToHide',
];
public const NAME_TO_MESSAGE_KEY = [
"userAgent" => "checkuser-clienthints-name-brand",
"architecture" => "checkuser-clienthints-name-architecture",
"bitness" => "checkuser-clienthints-name-bitness",
"brands" => "checkuser-clienthints-name-brand",
"formFactor" => "checkuser-clienthints-name-form-factor",
"fullVersionList" => "checkuser-clienthints-name-brand",
"mobile" => "checkuser-clienthints-name-mobile",
"model" => "checkuser-clienthints-name-model",
"platform" => "checkuser-clienthints-name-platform",
"platformVersion" => "checkuser-clienthints-name-platform-version",
"woW64" => "checkuser-clienthints-name-wow64",
];
private MessageLocalizer $messageLocalizer;
private ServiceOptions $options;
private array $msgCache;
public function __construct(
MessageLocalizer $messageLocalizer,
ServiceOptions $options
) {
$this->messageLocalizer = $messageLocalizer;
$options->assertRequiredOptions( self::CONSTRUCTOR_OPTIONS );
$this->options = $options;
$this->generateMsgCache();
}
/**
* Generates a cache of messages that are used that also take no
* parameters so that they do not need to be re-calculated each time.
*
* @return void
*/
private function generateMsgCache(): void {
foreach ( self::NAME_TO_MESSAGE_KEY as $msg ) {
$this->msgCache[$msg] = $this->messageLocalizer->msg( $msg )->escaped();
}
$this->msgCache['checkuser-clienthints-value-yes'] = $this->messageLocalizer
->msg( 'checkuser-clienthints-value-yes' )->escaped();
$this->msgCache['checkuser-clienthints-value-no'] = $this->messageLocalizer
->msg( 'checkuser-clienthints-value-no' )->escaped();
}
/**
* Batch formats ClientHintsData objects associated with reference IDs by
* taking the result from UserAgentClientHintsLookup::getClientHintsByReferenceIds
* and converting the ClientHintsData objects into human-readable strings.
*
* @param ClientHintsLookupResults $clientHintsLookupResults
* @return ClientHintsBatchFormatterResults
*/
public function batchFormatClientHintsData(
ClientHintsLookupResults $clientHintsLookupResults
): ClientHintsBatchFormatterResults {
[ $referenceIdsToClientHintsDataIndex, $clientHintsDataObjects ] = $clientHintsLookupResults->getRawData();
foreach ( $clientHintsDataObjects as &$clientHintsDataObject ) {
// This "batches" the formatting as it only does it once per unique combination of
// ClientHintsData object instead of passing the same object to ::formatClientHintsDataObject
// multiple times.
$clientHintsDataObject = $this->formatClientHintsDataObject( $clientHintsDataObject );
}
return new ClientHintsBatchFormatterResults( $referenceIdsToClientHintsDataIndex, $clientHintsDataObjects );
}
/**
* @param ClientHintsData $clientHintsData
* @return string
*/
public function formatClientHintsDataObject( ClientHintsData $clientHintsData ): string {
$clientHintsForDisplay = $this->options->get( 'CheckUserClientHintsForDisplay' );
// Combine Client Hints data where possible to reduce the length of the generated string.
$dataAsArray = $this->combineClientHintsData( $clientHintsData->jsonSerialize(), $clientHintsForDisplay );
// Get all the Client Hints data as their human-readable string representations
// in an array for later combination.
$dataAsStringArray = [];
foreach ( $clientHintsForDisplay as $clientHintName ) {
if ( array_key_exists( $clientHintName, $dataAsArray ) ) {
// If the Client Hint name is configured for display and is set in the $dataAsArray array
// of Client Hints data, then add it to the $dataAsStringArray after conversion to a string.
if ( in_array( $clientHintName, [ 'brands', 'fullVersionList' ] ) ) {
// If the Client Hint name is 'brands' or 'fullVersionList', then the value will be
// an array of items. Therefore add each brand as a new item to the $dataAsStringArray array.
if ( $dataAsArray[$clientHintName] !== null ) {
foreach ( $dataAsArray[$clientHintName] as $key => $brand ) {
// Get the brand as string using ::getBrandAsString, and if it returns a string
// that isn't empty then add it to $dataAsStringArray
$brandAsString = $this->getBrandAsString( $brand, false );
if ( $brandAsString ) {
$dataAsStringArray[$clientHintName . '-' . $key] = $this->generateClientHintsListItem(
$clientHintName, $brandAsString
);
}
}
}
} else {
$dataAsStringArray[$clientHintName] = $this->generateClientHintsListItem(
$clientHintName, $dataAsArray[$clientHintName]
);
}
}
}
// Remove items that equate to false (in this case this should be empty strings).
$dataAsStringArray = array_filter( $dataAsStringArray );
return $this->listToTextWithoutAnd( $dataAsStringArray );
}
/**
* Functionally similar to Language::listToText, but
* does not separate the last items with an "and" and instead
* uses another comma.
*
* This is done as the Language::listToText adding the "and"
* message makes the separation between the second to last
* Client Hints value and the last Client Hints name unclear.
*
* @param string[] $list
* @param-taint $list tainted
* @return string
*/
private function listToTextWithoutAnd( array $list ): string {
$itemCount = count( $list );
if ( $itemCount < 1 ) {
return '';
}
$comma = $this->messageLocalizer->msg( 'comma-separator' )->escaped();
return implode( $comma, $list );
}
/**
* Combines the Client Hints data given in the $dataAsArray parameter
* that is being configured to be displayed by $clientHintsForDisplay:
* * The "platform" and "platformVersion" items are combined into "platform" if
* both are to be displayed and both have values.
* * Items in the "brands" array are removed if an item exists in the "fullVersionList"
* array that has the same brand name and significant version number.
*
* @param array $dataAsArray The Client Hints data from ClientHintsData::jsonSerialize.
* @param array &$clientHintsForDisplay The value of the 'CheckUserClientHintsForDisplay' in a
* variable that can be modified without modifying that config. This is passed by reference.
* @return array
*/
private function combineClientHintsData( array $dataAsArray, array &$clientHintsForDisplay ): array {
if (
in_array( 'platform', $clientHintsForDisplay ) &&
in_array( 'platformVersion', $clientHintsForDisplay ) &&
( $dataAsArray['platform'] ?? false ) &&
( $dataAsArray['platformVersion'] ?? false )
) {
// Combine "platform" and "platformVersion" if both are set and are configured to be displayed.
// When combining them use a hardcoded space so be consistent with "brands" and "fullVersionList".
$dataAsArray["platform"] = $dataAsArray["platform"] . ' ' . $dataAsArray["platformVersion"];
unset( $dataAsArray["platformVersion"] );
// Update $clientHintsForDisplay to be have "platform" to the position of "platformVersion" if
// that was ordered closer to the start of $clientHintsForDisplay
$platformKey = array_search( 'platform', $clientHintsForDisplay );
$platformVersionKey = array_search( 'platformVersion', $clientHintsForDisplay );
if ( $platformVersionKey < $platformKey ) {
// Move "platform" via array_splice calls to be the item before "platformVersion" if
// "platformVersion" has a smaller integer key.
array_splice( $clientHintsForDisplay, $platformKey, 1 );
array_splice( $clientHintsForDisplay, $platformVersionKey, 0, 'platform' );
}
}
// Remove "brands" items if a entry for that brand name also exists in "fullVersionList"
// and both "brands" and "fullVersionList" are configured for display.
if (
in_array( 'brands', $clientHintsForDisplay ) &&
in_array( 'fullVersionList', $clientHintsForDisplay ) &&
( $dataAsArray['brands'] ?? false ) &&
( $dataAsArray['fullVersionList'] ?? false )
) {
// Get the items in 'brands' as strings for comparison
$brandsAsString = array_map( function ( $item ) {
return $this->getBrandAsString( $item, false );
}, $dataAsArray['brands'] );
// Remove brands that were not parsable.
$brandsAsString = array_filter( $brandsAsString );
foreach ( $dataAsArray["fullVersionList"] as $fullVersionBrand ) {
// If the 'fullVersionList' brand name with only the significant version number
// exactly matches an item in the 'brands' array, then remove that item in the
// 'brands' array as it duplicates the one in 'fullVersionList'.
$fullVersionBrandWithOnlySignificantVersion = $this->getBrandAsString( $fullVersionBrand, true );
$matchingBrandKey = array_search( $fullVersionBrandWithOnlySignificantVersion, $brandsAsString );
if ( $matchingBrandKey !== false ) {
unset( $dataAsArray['brands'][$matchingBrandKey] );
unset( $brandsAsString[$matchingBrandKey] );
}
}
// Reset the key numbering after some values may have been unset
// above.
$dataAsArray['brands'] = array_values( $dataAsArray['brands'] );
}
return $dataAsArray;
}
/**
* Generates a string item for the Client Hints string list returned by
* ::formatClientHintsDataObject. This adds the translated name and the
* value using the 'checkuser-clienthints-list-item' message.
*
* This method does not check if the $clientHintName is configured for
* display, but does check if the $clientHintValue is to be hidden.
*
* @param string $clientHintName The name of the Client Hints name-value pair, where the name is one of the
* array keys returned by ClientHintsData::jsonSerialize
* @param string|bool|null $clientHintValue The value for the Client Hints name-value pair. If this is a boolean,
* then "true" and "false" are converted to the messages "checkuser-clienthints-value-yes" and
* "checkuser-clienthints-value-no" respectively. If this is null, then an empty string is returned.
* @return string
*/
private function generateClientHintsListItem( string $clientHintName, $clientHintValue ) {
// Return the empty string for a null value or an falsey string value.
if (
$clientHintValue === null ||
( is_string( $clientHintValue ) && !$clientHintValue )
) {
return '';
}
$clientHintsValuesToHide = $this->options->get( 'CheckUserClientHintsValuesToHide' );
// Return an empty string if the item is configured to be hidden.
if (
array_key_exists( $clientHintName, $clientHintsValuesToHide ) &&
in_array( $clientHintValue, $clientHintsValuesToHide[$clientHintName] )
) {
return '';
}
// If the item is a boolean, convert the value to the translated version of
// "Yes" for true and "No" for false.
if ( is_bool( $clientHintValue ) ) {
if ( $clientHintValue ) {
$clientHintValue = $this->msgCache['checkuser-clienthints-value-yes'];
} else {
$clientHintValue = $this->msgCache['checkuser-clienthints-value-no'];
}
} else {
// If the item is a string, then trim leading and ending spaces
// as some wikis may have uach_value items with trailing or leading spaces.
// This would not be necessary if T345837 is implemented. This is currently
// needed because of untrimmed uach_value items in the database as detailed
// in T345649.
$clientHintValue = trim( $clientHintValue );
}
// Return the Client Hints name-value pair using the "checkuser-clienthints-list-item" message
// to combine the name and value.
return $this->messageLocalizer->msg( 'checkuser-clienthints-list-item' )
->rawParams( $this->msgCache[self::NAME_TO_MESSAGE_KEY[$clientHintName]] )
->params( $clientHintValue )
->escaped();
}
/**
* Gets the string version of an array or string in the 'brands' and 'fullVersionList' arrays.
* With the version optionally cut to only the significant number (the number before the first dot).
*
* @param mixed $item An array item from the 'brands' or 'fullVersionList' array.
* @param bool $significantOnly If an array, then attempt to make the version number only have
* the significant number.
* @return string|null If $item is an array then the imploded array. if $item is string then $item. Otherwise null.
*/
private function getBrandAsString( $item, bool $significantOnly ): ?string {
if ( is_array( $item ) ) {
ksort( $item );
if ( $significantOnly && count( $item ) > 1 ) {
// Remove the non-significant numbers from the version number if $significantOnly is set.
if ( array_key_exists( 'version', $item ) ) {
// If the 'version' key is set, then use this.
if ( strpos( $item['version'], '.' ) ) {
// If there is a point, then remove all text after the . in the 'version'.
$item['version'] = substr( $item['version'], 0, strpos( $item['version'], '.' ) );
}
}
}
// Implode the array into a string to get the brand as a string.
// The code above will have handled the removal of non-significant
// version numbers if this was requested and was also possible.
return implode( ' ', $item );
} elseif ( is_string( $item ) ) {
return $item;
}
// If the item is neither a string or array, then
// just return null as there isn't going to be a
// useful way to display the brand as a string in this case.
return null;
}
}

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