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<?php

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namespace Yoast\WP\SEO\Values\Robots;

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/**

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* Class User_Agent_List

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class User_Agent_List {

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/**

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* The list of user agents.

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* @var array

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private $user_agent_list;

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/**

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* User Agent list constructor.

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public function __construct() {

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$this->user_agent_list = [];

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}

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/**

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* Checks if given user_agent is already registered.

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* @param string $user_agent The user agent identifier.

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* @return bool

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public function has_user_agent( $user_agent ) {

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return \array_key_exists( $user_agent, $this->user_agent_list );

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}

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/**

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* Gets the user agent object. If it is not yet registered it creates it.

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* @param string $user_agent The user agent identifier.

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* @return User_Agent

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public function get_user_agent( $user_agent ) {

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if ( $this->has_user_agent( $user_agent ) ) {

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return $this->user_agent_list[ $user_agent ];

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}

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$this->user_agent_list[ $user_agent ] = new User_Agent( $user_agent );

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return $this->user_agent_list[ $user_agent ];

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}

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/**

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* Gets the list of user agents.

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* @return array

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public function get_user_agents() {

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return $this->user_agent_list;

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}

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/**

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* Gets a list of all disallow directives by user agent.

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* @return array

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public function get_disallow_directives() {

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$directives = [];

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foreach ( $this->user_agent_list as $user_agent ) {

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$directives[ $user_agent->get_user_agent() ] = $user_agent->get_disallow_paths();

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}

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return $directives;

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}

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/**

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* Gets a list of all sallow directives by user agent.

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* @return array

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public function get_allow_directives() {

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$directives = [];

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foreach ( $this->user_agent_list as $user_agent ) {

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$directives[ $user_agent->get_user_agent() ] = $user_agent->get_allow_paths();

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}

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return $directives;

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}

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}

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