<?php

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namespace Evaluation;

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use Code_Snippets\DB;

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use Code_Snippets\REST_API\Snippets_REST_Controller;

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use Code_Snippets\Settings;

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use Code_Snippets\Snippet_Files;

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use function Code_Snippets\clean_active_snippets_cache;

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use function Code_Snippets\clean_snippets_cache;

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use function Code_Snippets\execute_snippet;

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use function Code_Snippets\code_snippets;

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use function Code_Snippets\execute_snippet_from_flat_file;

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/**

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* Class for evaluating functions snippets.

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*

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* @package Code_Snippets

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*/

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class Evaluate_Functions {

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/**

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* Database class.

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*

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* @var DB

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*/

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private DB $db;

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/**

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* Class constructor.

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*

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* @param DB $db Database class instance.

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*/

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public function __construct( DB $db ) {

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$this->db = $db;

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add_action( 'plugins_loaded', [ $this, 'evaluate_early' ], 1 );

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}

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/**

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* Retrieve details about the currently edited snippet, if any.

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*

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* @return ?array{id: int, table: string}

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*/

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private function get_currently_editing_snippet(): ?array {

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if ( wp_is_json_request() && ! empty( $_SERVER['REQUEST_URI'] ) ) {

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$url = wp_parse_url( esc_url_raw( wp_unslash( $_SERVER['REQUEST_URI'] ) ) );

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if ( isset( $url['path'] ) && false !== strpos( $url['path'], Snippets_REST_Controller::get_prefixed_base_route() ) ) {

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$path_parts = explode( '/', $url['path'] );

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$edit_id = intval( end( $path_parts ) );

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if ( ! empty( $url['query'] ) ) {

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wp_parse_str( $url['query'], $path_params );

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$edit_table = isset( $path_params['network'] ) && rest_sanitize_boolean( $path_params['network'] )

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? $this->db->ms_table

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: $this->db->table;

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}

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return [

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'id' => $edit_id,

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'table' => $edit_table ?? $this->db->table,

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];

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}

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}

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return null;

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}

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/**

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* Check if the plugin is running in safe mode.

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*

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* @return bool

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*

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* @noinspection PhpUndefinedConstantInspection

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*/

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public function is_safe_mode_active(): bool {

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return ( defined( 'CODE_SNIPPETS_SAFE_MODE' ) && CODE_SNIPPETS_SAFE_MODE ) ||

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! apply_filters( 'code_snippets/execute_snippets', true );

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}

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/**

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* Quickly deactivate a snippet with minimal overhead.

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*

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* @param int $snippet_id ID of the snippet to deactivate.

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* @param string $table_name Name of the table where the snippet is stored.

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*

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* @return void

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*/

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private function quick_deactivate_snippet( int $snippet_id, string $table_name ) {

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global $wpdb;

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$active_shared_ids = get_option( 'active_shared_network_snippets', [] );

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$active_shared_ids = is_array( $active_shared_ids )

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? array_map( 'intval', $active_shared_ids )

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: [];

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if ( $table_name === $this->db->ms_table && in_array( $snippet_id, $active_shared_ids, true ) ) {

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unset( $active_shared_ids[ array_search( $snippet_id, $active_shared_ids, true ) ] );

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$active_shared_ids = array_values( $active_shared_ids );

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update_option( 'active_shared_network_snippets', $active_shared_ids );

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clean_active_snippets_cache( $table_name );

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} else {

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$wpdb->update(

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$table_name,

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[ 'active' => '0' ],

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[ 'id' => $snippet_id ],

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[ '%d' ],

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[ '%d' ]

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);

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clean_snippets_cache( $table_name );

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$network = $table_name === $this->db->ms_table;

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do_action( 'code_snippets/deactivate_snippet', $snippet_id, $network );

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}

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}

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private function evaluate_snippet_flat_file( array $snippet, string $file_path, ?array $edit_snippet = null ) {

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$snippet_id = $snippet['id'];

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$code = $snippet['code'];

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$table_name = $snippet['table'];

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// If the snippet is a single-use snippet, deactivate it before execution to ensure that the process always happens.

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if ( 'single-use' === $snippet['scope'] ) {

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$this->quick_deactivate_snippet( $snippet_id, $table_name );

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}

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if ( ! is_null( $edit_snippet ) && $edit_snippet['id'] === $snippet_id && $edit_snippet['table'] === $table_name ) {

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return;

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}

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if ( apply_filters( 'code_snippets/allow_execute_snippet', true, $snippet_id, $table_name ) ) {

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execute_snippet_from_flat_file( $code, $file_path, $snippet_id );

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}

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}

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/**

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* Evaluate applicable active snippets as early as possible.

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*

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* @return bool True if snippets were evaluated, false if safe mode is active.

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*/

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public function evaluate_early(): bool {

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if ( $this->is_safe_mode_active() ) {

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return false;

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}

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if ( Snippet_Files::is_active() ) {

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return $this->evaluate_file_snippets();

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}

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return $this->evaluate_db_snippets();

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}

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public function evaluate_db_snippets(): bool {

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$scopes = [ 'global', 'single-use', is_admin() ? 'admin' : 'front-end' ];

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$active_snippets = $this->db->fetch_active_snippets( $scopes );

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$edit_snippet = $this->get_currently_editing_snippet();

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foreach ( $active_snippets as $snippet ) {

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$snippet_id = $snippet['id'];

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$code = $snippet['code'];

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$table_name = $snippet['table'];

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// If the snippet is a single-use snippet, deactivate it before execution to ensure that the process always happens.

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if ( 'single-use' === $snippet['scope'] ) {

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$this->quick_deactivate_snippet( $snippet_id, $table_name );

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}

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if ( apply_filters( 'code_snippets/allow_execute_snippet', true, $snippet_id, $table_name ) &&

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( is_null( $edit_snippet ) || $edit_snippet['id'] !== $snippet_id || $edit_snippet['table'] !== $table_name ) ) {

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execute_snippet( $code, $snippet_id );

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}

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}

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return true;

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}

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private function evaluate_file_snippets(): bool {

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$type = 'php';

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$scopes = [ 'global', 'single-use', is_admin() ? 'admin' : 'front-end' ];

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$snippets = Snippet_Files::get_active_snippets_from_flat_files( $scopes, $type );

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$edit_snippet = $this->get_currently_editing_snippet();

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foreach ( $snippets as $snippet ) {

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$table_name = Snippet_Files::get_hashed_table_name( $snippet['table'] );

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$base_path = Snippet_Files::get_base_dir( $table_name, $type );

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$file = $base_path . '/' . $snippet['id'] . '.' . $type;

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$this->evaluate_snippet_flat_file( $snippet, $file, $edit_snippet );

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}

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return true;

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}

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}

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