241 lines
6.7 KiB
PHP
241 lines
6.7 KiB
PHP
<?php
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/**
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* WordPress Coding Standard.
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*
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* @package WPCS\WordPressCodingStandards
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* @link https://github.com/WordPress/WordPress-Coding-Standards
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* @license https://opensource.org/licenses/MIT MIT
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*/
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namespace WordPressCS\WordPress;
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use WordPressCS\WordPress\Sniff;
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/**
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* Restricts array assignment of certain keys.
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*
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* @package WPCS\WordPressCodingStandards
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*
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* @since 0.3.0
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* @since 0.10.0 Class became a proper abstract class. This was already the behaviour.
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* Moved the file and renamed the class from
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* `\WordPressCS\WordPress\Sniffs\Arrays\ArrayAssignmentRestrictionsSniff` to
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* `\WordPressCS\WordPress\AbstractArrayAssignmentRestrictionsSniff`.
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*/
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abstract class AbstractArrayAssignmentRestrictionsSniff extends Sniff {
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/**
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* Exclude groups.
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*
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* Example: 'foo,bar'
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*
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* @since 0.3.0
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* @since 1.0.0 This property now expects to be passed an array.
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* Previously a comma-delimited string was expected.
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*
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* @var array
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*/
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public $exclude = array();
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/**
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* Groups of variable data to check against.
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* Don't use this in extended classes, override getGroups() instead.
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* This is only used for Unit tests.
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*
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* @var array
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*/
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public static $groups = array();
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/**
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* Cache for the excluded groups information.
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*
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* @since 0.11.0
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*
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* @var array
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*/
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protected $excluded_groups = array();
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/**
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* Cache for the group information.
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*
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* @since 0.13.0
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*
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* @var array
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*/
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protected $groups_cache = array();
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/**
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* Returns an array of tokens this test wants to listen for.
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*
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* @return array
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*/
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public function register() {
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// Retrieve the groups only once and don't set up a listener if there are no groups.
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if ( false === $this->setup_groups() ) {
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return array();
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}
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return array(
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\T_DOUBLE_ARROW,
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\T_CLOSE_SQUARE_BRACKET,
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\T_CONSTANT_ENCAPSED_STRING,
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\T_DOUBLE_QUOTED_STRING,
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);
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}
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/**
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* Groups of variables to restrict.
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*
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* This method should be overridden in extending classes.
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*
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* Example: groups => array(
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* 'groupname' => array(
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* 'type' => 'error' | 'warning',
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* 'message' => 'Dont use this one please!',
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* 'keys' => array( 'key1', 'another_key' ),
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* 'callback' => array( 'class', 'method' ), // Optional.
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* )
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* )
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*
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* @return array
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*/
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abstract public function getGroups();
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/**
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* Cache the groups.
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*
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* @since 0.13.0
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*
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* @return bool True if the groups were setup. False if not.
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*/
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protected function setup_groups() {
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$this->groups_cache = $this->getGroups();
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if ( empty( $this->groups_cache ) && empty( self::$groups ) ) {
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return false;
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}
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// Allow for adding extra unit tests.
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if ( ! empty( self::$groups ) ) {
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$this->groups_cache = array_merge( $this->groups_cache, self::$groups );
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}
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return true;
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}
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/**
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* Processes this test, when one of its tokens is encountered.
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*
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* @param int $stackPtr The position of the current token in the stack.
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*
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* @return void
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*/
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public function process_token( $stackPtr ) {
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$this->excluded_groups = $this->merge_custom_array( $this->exclude );
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if ( array_diff_key( $this->groups_cache, $this->excluded_groups ) === array() ) {
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// All groups have been excluded.
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// Don't remove the listener as the exclude property can be changed inline.
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return;
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}
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$token = $this->tokens[ $stackPtr ];
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if ( \T_CLOSE_SQUARE_BRACKET === $token['code'] ) {
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$equal = $this->phpcsFile->findNext( \T_WHITESPACE, ( $stackPtr + 1 ), null, true );
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if ( \T_EQUAL !== $this->tokens[ $equal ]['code'] ) {
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return; // This is not an assignment!
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}
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}
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// Instances: Multi-dimensional array, keyed by line.
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$inst = array();
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/*
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* Covers:
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* $foo = array( 'bar' => 'taz' );
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* $foo['bar'] = $taz;
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*/
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if ( \in_array( $token['code'], array( \T_CLOSE_SQUARE_BRACKET, \T_DOUBLE_ARROW ), true ) ) {
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$operator = $stackPtr; // T_DOUBLE_ARROW.
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if ( \T_CLOSE_SQUARE_BRACKET === $token['code'] ) {
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$operator = $this->phpcsFile->findNext( \T_EQUAL, ( $stackPtr + 1 ) );
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}
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$keyIdx = $this->phpcsFile->findPrevious( array( \T_WHITESPACE, \T_CLOSE_SQUARE_BRACKET ), ( $operator - 1 ), null, true );
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if ( ! is_numeric( $this->tokens[ $keyIdx ]['content'] ) ) {
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$key = $this->strip_quotes( $this->tokens[ $keyIdx ]['content'] );
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$valStart = $this->phpcsFile->findNext( array( \T_WHITESPACE ), ( $operator + 1 ), null, true );
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$valEnd = $this->phpcsFile->findNext( array( \T_COMMA, \T_SEMICOLON ), ( $valStart + 1 ), null, false, null, true );
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$val = $this->phpcsFile->getTokensAsString( $valStart, ( $valEnd - $valStart ) );
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$val = $this->strip_quotes( $val );
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$inst[ $key ][] = array( $val, $token['line'] );
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}
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} elseif ( \in_array( $token['code'], array( \T_CONSTANT_ENCAPSED_STRING, \T_DOUBLE_QUOTED_STRING ), true ) ) {
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// $foo = 'bar=taz&other=thing';
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if ( preg_match_all( '#(?:^|&)([a-z_]+)=([^&]*)#i', $this->strip_quotes( $token['content'] ), $matches ) <= 0 ) {
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return; // No assignments here, nothing to check.
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}
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foreach ( $matches[1] as $i => $_k ) {
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$inst[ $_k ][] = array( $matches[2][ $i ], $token['line'] );
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}
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}
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if ( empty( $inst ) ) {
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return;
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}
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foreach ( $this->groups_cache as $groupName => $group ) {
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if ( isset( $this->excluded_groups[ $groupName ] ) ) {
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continue;
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}
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$callback = ( isset( $group['callback'] ) && is_callable( $group['callback'] ) ) ? $group['callback'] : array( $this, 'callback' );
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foreach ( $inst as $key => $assignments ) {
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foreach ( $assignments as $occurance ) {
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list( $val, $line ) = $occurance;
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if ( ! \in_array( $key, $group['keys'], true ) ) {
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continue;
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}
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$output = \call_user_func( $callback, $key, $val, $line, $group );
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if ( ! isset( $output ) || false === $output ) {
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continue;
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} elseif ( true === $output ) {
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$message = $group['message'];
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} else {
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$message = $output;
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}
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$this->addMessage(
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$message,
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$stackPtr,
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( 'error' === $group['type'] ),
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$this->string_to_errorcode( $groupName . '_' . $key ),
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array( $key, $val )
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);
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}
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}
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}
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}
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/**
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* Callback to process each confirmed key, to check value.
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*
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* This method must be extended to add the logic to check assignment value.
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*
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* @param string $key Array index / key.
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* @param mixed $val Assigned value.
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* @param int $line Token line.
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* @param array $group Group definition.
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* @return mixed FALSE if no match, TRUE if matches, STRING if matches
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* with custom error message passed to ->process().
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*/
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abstract public function callback( $key, $val, $line, $group );
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}
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