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<?php
/**
* WPSEO plugin file.
*
* @package WPSEO\Internals
*/
/**
* Holder for SEO Rank information.
*/
class WPSEO_Rank {
/**
* Constant used for determining a bad SEO rating.
*
* @var string
*/
const BAD = 'bad';
/**
* Constant used for determining an OK SEO rating.
*
* @var string
*/
const OK = 'ok';
/**
* Constant used for determining a good SEO rating.
*
* @var string
*/
const GOOD = 'good';
/**
* Constant used for determining that no focus keyphrase is set.
*
* @var string
*/
const NO_FOCUS = 'na';
/**
* Constant used for determining that this content is not indexed.
*
* @var string
*/
const NO_INDEX = 'noindex';
/**
* All possible ranks.
*
* @var array
*/
protected static $ranks = [
self::BAD,
self::OK,
self::GOOD,
self::NO_FOCUS,
self::NO_INDEX,
];
/**
* Holds the translation from seo score slug to actual score range.
*
* @var array
*/
protected static $ranges = [
self::NO_FOCUS => [
'start' => 0,
'end' => 0,
],
self::BAD => [
'start' => 1,
'end' => 40,
],
self::OK => [
'start' => 41,
'end' => 70,
],
self::GOOD => [
'start' => 71,
'end' => 100,
],
];
/**
* The current rank.
*
* @var int
*/
protected $rank;
/**
* WPSEO_Rank constructor.
*
* @param int $rank The actual rank.
*/
public function __construct( $rank ) {
if ( ! in_array( $rank, self::$ranks, true ) ) {
$rank = self::BAD;
}
$this->rank = $rank;
}
/**
* Returns the saved rank for this rank.
*
* @return string
*/
public function get_rank() {
return $this->rank;
}
/**
* Returns a CSS class for this rank.
*
* @return string
*/
public function get_css_class() {
$labels = [
self::NO_FOCUS => 'na',
self::NO_INDEX => 'noindex',
self::BAD => 'bad',
self::OK => 'ok',
self::GOOD => 'good',
];
return $labels[ $this->rank ];
}
/**
* Returns a label for this rank.
*
* @return string
*/
public function get_label() {
$labels = [
self::NO_FOCUS => __( 'Not available', 'wordpress-seo' ),
self::NO_INDEX => __( 'No index', 'wordpress-seo' ),
self::BAD => __( 'Needs improvement', 'wordpress-seo' ),
self::OK => __( 'OK', 'wordpress-seo' ),
self::GOOD => __( 'Good', 'wordpress-seo' ),
];
return $labels[ $this->rank ];
}
/**
* Returns a label for use in a drop down.
*
* @return mixed
*/
public function get_drop_down_label() {
$labels = [
self::NO_FOCUS => sprintf(
/* translators: %s expands to the SEO score */
__( 'SEO: %s', 'wordpress-seo' ),
__( 'No Focus Keyphrase', 'wordpress-seo' )
),
self::BAD => sprintf(
/* translators: %s expands to the SEO score */
__( 'SEO: %s', 'wordpress-seo' ),
__( 'Needs improvement', 'wordpress-seo' )
),
self::OK => sprintf(
/* translators: %s expands to the SEO score */
__( 'SEO: %s', 'wordpress-seo' ),
__( 'OK', 'wordpress-seo' )
),
self::GOOD => sprintf(
/* translators: %s expands to the SEO score */
__( 'SEO: %s', 'wordpress-seo' ),
__( 'Good', 'wordpress-seo' )
),
self::NO_INDEX => sprintf(
/* translators: %s expands to the SEO score */
__( 'SEO: %s', 'wordpress-seo' ),
__( 'Post Noindexed', 'wordpress-seo' )
),
];
return $labels[ $this->rank ];
}
/**
* Gets the drop down labels for the readability score.
*
* @return string The readability rank label.
*/
public function get_drop_down_readability_labels() {
$labels = [
self::BAD => sprintf(
/* translators: %s expands to the readability score */
__( 'Readability: %s', 'wordpress-seo' ),
__( 'Needs improvement', 'wordpress-seo' )
),
self::OK => sprintf(
/* translators: %s expands to the readability score */
__( 'Readability: %s', 'wordpress-seo' ),
__( 'OK', 'wordpress-seo' )
),
self::GOOD => sprintf(
/* translators: %s expands to the readability score */
__( 'Readability: %s', 'wordpress-seo' ),
__( 'Good', 'wordpress-seo' )
),
];
return $labels[ $this->rank ];
}
/**
* Get the starting score for this rank.
*
* @return int The start score.
*/
public function get_starting_score() {
// No index does not have a starting score.
if ( self::NO_INDEX === $this->rank ) {
return -1;
}
return self::$ranges[ $this->rank ]['start'];
}
/**
* Get the ending score for this rank.
*
* @return int The end score.
*/
public function get_end_score() {
// No index does not have an end score.
if ( self::NO_INDEX === $this->rank ) {
return -1;
}
return self::$ranges[ $this->rank ]['end'];
}
/**
* Returns a rank for a specific numeric score.
*
* @param int $score The score to determine a rank for.
*
* @return self
*/
public static function from_numeric_score( $score ) {
// Set up the default value.
$rank = new self( self::BAD );
foreach ( self::$ranges as $rank_index => $range ) {
if ( $range['start'] <= $score && $score <= $range['end'] ) {
$rank = new self( $rank_index );
break;
}
}
return $rank;
}
/**
* Returns a list of all possible SEO Ranks.
*
* @return WPSEO_Rank[]
*/
public static function get_all_ranks() {
return array_map( [ 'WPSEO_Rank', 'create_rank' ], self::$ranks );
}
/**
* Returns a list of all possible Readability Ranks.
*
* @return WPSEO_Rank[]
*/
public static function get_all_readability_ranks() {
return array_map( [ 'WPSEO_Rank', 'create_rank' ], [ self::BAD, self::OK, self::GOOD ] );
}
/**
* Converts a numeric rank into a WPSEO_Rank object, for use in functional array_* functions.
*
* @param string $rank SEO Rank.
*
* @return WPSEO_Rank
*/
private static function create_rank( $rank ) {
return new self( $rank );
}
}