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<?php |
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/** |
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* Class to manage headline IDs. |
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* |
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* Ensures a unique anchor for each headline. |
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* |
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* @package simpletoc |
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*/ |
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|
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namespace MToensing\SimpleTOC; |
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|
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/** |
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* Class to manage headline IDs. |
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* |
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* Ensures a unique anchor for each headline. |
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*/ |
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class SimpleTOC_Headline_Ids { |
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/** |
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* Array of headlines and their counts. |
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* |
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* @var array |
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*/ |
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private $headlines = array(); |
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|
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/** |
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* Add a headline to the array |
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* |
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* @param string $headline_slug The slug of the headline. |
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*/ |
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private function add_headline( $headline_slug ) { |
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if ( empty( $headline_slug ) ) { |
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return; |
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} |
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|
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if ( ! isset( $this->headlines[ $headline_slug ] ) ) { |
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$this->headlines[ $headline_slug ] = 1; |
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} else { |
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$this->headlines[ $headline_slug ] = $this->get_headline_count( $headline_slug ) + 1; |
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} |
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if ( $this->headlines[ $headline_slug ] > 1 ) { |
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$new_headline_slug = $headline_slug . '-' . $this->headlines[ $headline_slug ]; |
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if ( isset( $this->headlines[ $new_headline_slug ] ) ) { |
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$new_headline_slug = $this->add_headline( $new_headline_slug ); |
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} |
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$new_headline_count = $this->get_headline_count( $new_headline_slug ); |
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if ( 0 === $new_headline_count ) { |
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$new_headline_count = 1; |
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} |
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$this->headlines[ $new_headline_slug ] = $new_headline_count; |
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return $new_headline_slug; |
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} |
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return $headline_slug; |
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} |
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|
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/** |
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* Get the anchor for a headline |
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* |
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* @param string $headline The headline. |
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* @return string The anchor for the headline |
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*/ |
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public function get_headline_anchor( $headline ) { |
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if ( empty( $headline ) ) { |
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return ''; |
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} |
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|
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$headline_slug = simpletoc_sanitize_string( $headline ); |
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|
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$headline_slug = $this->add_headline( $headline_slug ); |
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return $headline_slug; |
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} |
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|
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/** |
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* Get the count of a headline slug. |
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* |
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* @param string $headline_slug The slug of the headline. |
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* @return mixed The count of the headline slug. |
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*/ |
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private function get_headline_count( $headline_slug = '' ) { |
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return $this->headlines[ $headline_slug ] ?? 0; |
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} |
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} |
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|
