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<?php
/**
* Class TransformerCommand.
*
* Commands that deal with the transformers registered with the AMP optimizer.
*
* @package AmpProject\AmpWP
*/
namespace AmpProject\AmpWP\Cli;
use AmpProject\AmpWP\Infrastructure\CliCommand;
use AmpProject\AmpWP\Infrastructure\Service;
use AmpProject\Optimizer\Configuration;
use AmpProject\Optimizer\Exception\UnknownConfigurationClass;
use WP_CLI;
/**
* Commands that deal with the transformers registered with the AMP optimizer. (EXPERIMENTAL)
*
* Note: The Optimizer CLI commands are to be considered experimental, as
* the output they produce is currently not guaranteed to be consistent
* with the corresponding output from the web server code path.
*
* @since 2.1.0
* @internal
*/
final class TransformerCommand implements Service, CliCommand {
/**
* @var Configuration
*/
private $configuration;
/**
* Get the name under which to register the CLI command.
*
* @return string The name under which to register the CLI command.
*/
public static function get_command_name() {
return 'amp optimizer transformer';
}
/**
* TransformerCommand constructor.
*
* @param Configuration $configuration Configuration object instance to use.
*/
public function __construct( Configuration $configuration ) {
$this->configuration = $configuration;
}
/**
* List the transformers registered with the AMP Optimizer. (EXPERIMENTAL)
*
* Note: The Optimizer CLI commands are to be considered experimental, as
* the output they produce is currently not guaranteed to be consistent
* with the corresponding output from the web server code path.
*
* ## OPTIONS
*
* [--<field>=<value>]
* : Only list the transformers where <field> equals the requested <value>.
*
* [--fields=<fields>]
* : Limit the output to specific fields. Defaults to all fields.
*
* [--field=<field>]
* : Prints the value of a single field for each transformer.
*
* [--format=<format>]
* : Render output in a particular format.
* ---
* default: table
* options:
* - count
* - csv
* - json
* - table
* - yaml
* ---
*
* ## EXAMPLES
*
* # Show a list of all transformers that were added by the AMP for WordPress plugin:
* $ wp amp optimizer transformer list --source=plugin
* +----------------------+--------+
* | transformer | source |
* +----------------------+--------+
* | AmpSchemaOrgMetadata | plugin |
* | DetermineHeroImages | plugin |
* +----------------------+--------+
*
* @subcommand list
*
* @param array $args Array of positional arguments.
* @param array $assoc_args Associative array of associative arguments.
* @throws WP_CLI\ExitException If the requested file could not be read.
*/
public function list_( $args, $assoc_args ) {
$default_fields = [
'transformer',
'source',
];
$defaults = [
'fields' => implode( ',', $default_fields ),
'format' => 'table',
];
$assoc_args = array_merge( $defaults, $assoc_args );
$transformers = array_map(
function ( $transformer_class ) {
return [
'transformer' => $this->get_transformer_name( $transformer_class ),
'source' => $this->get_transformer_source( $transformer_class ),
];
},
$this->configuration->get( Configuration::KEY_TRANSFORMERS )
);
$transformers = $this->filter_entries( $transformers, $default_fields, $assoc_args );
if ( 'count' === $assoc_args['format'] ) {
WP_CLI::log( (string) count( $transformers ) );
return;
}
if ( empty( $transformers ) ) {
WP_CLI::error( 'No matching transformers found.' );
}
$formatter = new WP_CLI\Formatter( $assoc_args, $default_fields );
$formatter->display_items( $transformers );
}
/**
* List the configuration of a given transformer. (EXPERIMENTAL)
*
* Note: The Optimizer CLI commands are to be considered experimental, as
* the output they produce is currently not guaranteed to be consistent
* with the corresponding output from the web server code path.
*
* ## OPTIONS
*
* <transformer>
* : Name of the transformer to display the configuration for.
*
* [--<field>=<value>]
* : Only list the config entries where <field> equals the requested <value>.
*
* [--fields=<fields>]
* : Limit the output to specific fields. Defaults to all fields.
*
* [--field=<field>]
* : Prints the value of a single field for each config entry.
*
* [--format=<format>]
* : Render output in a particular format.
* ---
* default: table
* options:
* - count
* - csv
* - json
* - table
* - yaml
* ---
*
* ## EXAMPLES
*
* # Check the current configuration of the RewriteAmpUrls transformer.
* $ wp amp optimizer transformer config RewriteAmpUrls
* +-------------------+----------------------------+
* | key | value |
* +-------------------+----------------------------+
* | ampRuntimeVersion | |
* | ampUrlPrefix | https://cdn.ampproject.org |
* | esmModulesEnabled | true |
* | geoApiUrl | |
* | lts | false |
* | rtv | false |
* +-------------------+----------------------------+
*
* # Fetch the attribute that is added to store a backup of inlined styles.
* $ wp amp optimizer transformer config OptimizeHeroImages --key=inlineStyleBackupAttribute --field=value
* data-amp-original-style
*
* # Render the configuration of the AmpRuntimeCss transformer as a JSON array.
* $ wp amp optimizer transformer config AmpRuntimeCss --format=json
* {"canary":false,"styles":"","version":""}
*
* @param array $args Array of positional arguments.
* @param array $assoc_args Associative array of associative arguments.
* @throws WP_CLI\ExitException If the requested file could not be read.
*/
public function config( $args, $assoc_args ) {
$transformer = array_shift( $args );
$transformer_class = $this->deduce_transformer_class( $transformer );
if ( false === $transformer_class ) {
WP_CLI::error( "Unknown transformer: {$transformer}." );
}
$default_fields = [
'key',
'value',
];
$defaults = [
'fields' => implode( ',', $default_fields ),
'format' => 'table',
];
$assoc_args = array_merge( $defaults, $assoc_args );
try {
$config_array = $this->configuration->getTransformerConfiguration( $transformer_class )->toArray();
} catch ( UnknownConfigurationClass $exception ) {
WP_CLI::error( $exception->getMessage() );
return;
}
$config_entries = [];
foreach ( $config_array as $key => $value ) {
if ( is_bool( $value ) && in_array( $assoc_args['format'], [ 'table', 'csv' ], true ) ) {
$value = $value ? 'true' : 'false';
}
$config_entries[] = compact( 'key', 'value' );
}
$config_entries = $this->filter_entries( $config_entries, $default_fields, $assoc_args );
if ( 'count' === $assoc_args['format'] ) {
WP_CLI::log( (string) count( $config_entries ) );
return;
}
if ( empty( $config_entries ) ) {
WP_CLI::error( 'No matching config entries found.' );
}
if ( 'json' === $assoc_args['format'] ) {
// Flatten the entries again for producing the JSON output that the spec tests understand.
$json_array = [];
foreach ( $config_entries as $config_entry ) {
$json_array[ $config_entry['key'] ] = $config_entry['value'];
}
WP_CLI::log( wp_json_encode( $json_array ) );
return;
}
$formatter = new WP_CLI\Formatter( $assoc_args, $default_fields );
$formatter->display_items( $config_entries );
}
/**
* Filters the entries of an associative array based on a provided filter key.
*
* @param array $entries Associative array to filter.
* @param array $fields Array of known fields.
* @param array $assoc_args Filters to apply.
*
* @return array
*/
private function filter_entries( $entries, $fields, $assoc_args ) {
$result = [];
foreach ( $entries as $entry ) {
foreach ( $fields as $field ) {
if (
array_key_exists( $field, $assoc_args )
&&
$entry[ $field ] !== $assoc_args[ $field ]
) {
continue 2;
}
}
$result[] = $entry;
}
return $result;
}
/**
* Deduce the transformer class from a transformer name.
*
* @param string $transformer Transformer name to get the class for.
* @return string|false Class of the transformer, or false if none found.
*/
private function deduce_transformer_class( $transformer ) {
$transformer_classes = $this->configuration->get( Configuration::KEY_TRANSFORMERS );
foreach ( $transformer_classes as $transformer_class ) {
if ( $transformer === $this->get_transformer_name( $transformer_class ) ) {
return (string) $transformer_class;
}
}
return false;
}
/**
* Get the name of a transformer from its class.
*
* @param string $transformer_class Transformer class to get the name for.
* @return string Name of the transformer.
*/
private function get_transformer_name( $transformer_class ) {
$name_parts = explode( '\\', $transformer_class );
return (string) array_pop( $name_parts );
}
/**
* Get the source of a transformer.
*
* @param string $transformer_class Class of the transformer to get the source for.
* @return string Source of the transformer. Will be one of 'toolbox', 'plugin', 'third-party'.
*/
private function get_transformer_source( $transformer_class ) {
if ( 0 === strpos( $transformer_class, 'AmpProject\\Optimizer\\Transformer\\' ) ) {
return 'toolbox';
}
if ( 0 === strpos( $transformer_class, 'AmpProject\\AmpWP\\Optimizer\\Transformer\\' ) ) {
return 'plugin';
}
return 'third-party';
}
}
