<?php
/**
 * \PHPCompatibility\Sniffs\IniDirectives\RemovedIniDirectivesSniff.
 *
 * @category  PHP
 * @package   PHPCompatibility
 * @author    Wim Godden <wim.godden@cu.be>
 * @copyright 2012 Cu.be Solutions bvba
 */

namespace PHPCompatibility\Sniffs\IniDirectives;

use PHPCompatibility\AbstractRemovedFeatureSniff;
use PHP_CodeSniffer_File as File;

/**
 * \PHPCompatibility\Sniffs\IniDirectives\RemovedIniDirectivesSniff.
 *
 * Discourages the use of deprecated and removed INI directives through ini_set() or ini_get().
 *
 * @category  PHP
 * @package   PHPCompatibility
 * @author    Wim Godden <wim.godden@cu.be>
 * @copyright 2012 Cu.be Solutions bvba
 */
class RemovedIniDirectivesSniff extends AbstractRemovedFeatureSniff
{
    /**
     * A list of deprecated INI directives.
     *
     * The array lists : version number with false (deprecated) and true (removed).
     * If's sufficient to list the first version where the ini directive was deprecated/removed.
     *
     * @var array(string)
     */
    protected $deprecatedIniDirectives = array(
        'fbsql.batchSize' => array(
            '5.1'         => true,
            'alternative' => 'fbsql.batchsize',
        ),

        'ifx.allow_persistent' => array(
            '5.2.1' => true,
        ),
        'ifx.blobinfile' => array(
            '5.2.1' => true,
        ),
        'ifx.byteasvarchar' => array(
            '5.2.1' => true,
        ),
        'ifx.charasvarchar' => array(
            '5.2.1' => true,
        ),
        'ifx.default_host' => array(
            '5.2.1' => true,
        ),
        'ifx.default_password' => array(
            '5.2.1' => true,
        ),
        'ifx.default_user' => array(
            '5.2.1' => true,
        ),
        'ifx.max_links' => array(
            '5.2.1' => true,
        ),
        'ifx.max_persistent' => array(
            '5.2.1' => true,
        ),
        'ifx.nullformat' => array(
            '5.2.1' => true,
        ),
        'ifx.textasvarchar' => array(
            '5.2.1' => true,
        ),

        'zend.ze1_compatibility_mode' => array(
            '5.3' => true,
        ),

        'allow_call_time_pass_reference' => array(
            '5.3' => false,
            '5.4' => true,
        ),
        'define_syslog_variables' => array(
            '5.3' => false,
            '5.4' => true,
        ),
        'detect_unicode' => array(
            '5.4'         => true,
            'alternative' => 'zend.detect_unicode',
        ),
        'highlight.bg' => array(
            '5.3' => false,
            '5.4' => true,
        ),
        'magic_quotes_gpc' => array(
            '5.3' => false,
            '5.4' => true,
        ),
        'magic_quotes_runtime' => array(
            '5.3' => false,
            '5.4' => true,
        ),
        'magic_quotes_sybase' => array(
            '5.3' => false,
            '5.4' => true,
        ),
        'mbstring.script_encoding' => array(
            '5.4'         => true,
            'alternative' => 'zend.script_encoding',
        ),
        'register_globals' => array(
            '5.3' => false,
            '5.4' => true,
        ),
        'register_long_arrays' => array(
            '5.3' => false,
            '5.4' => true,
        ),
        'safe_mode' => array(
            '5.3' => false,
            '5.4' => true,
        ),
        'safe_mode_allowed_env_vars' => array(
            '5.3' => false,
            '5.4' => true,
        ),
        'safe_mode_exec_dir' => array(
            '5.3' => false,
            '5.4' => true,
        ),
        'safe_mode_gid' => array(
            '5.3' => false,
            '5.4' => true,
        ),
        'safe_mode_include_dir' => array(
            '5.3' => false,
            '5.4' => true,
        ),
        'safe_mode_protected_env_vars' => array(
            '5.3' => false,
            '5.4' => true,
        ),
        'session.bug_compat_42' => array(
            '5.3' => false,
            '5.4' => true,
        ),
        'session.bug_compat_warn' => array(
            '5.3' => false,
            '5.4' => true,
        ),
        'y2k_compliance' => array(
            '5.3' => false,
            '5.4' => true,
        ),

        'always_populate_raw_post_data' => array(
            '5.6' => false,
            '7.0' => true,
        ),
        'iconv.input_encoding' => array(
            '5.6' => false,
        ),
        'iconv.output_encoding' => array(
            '5.6' => false,
        ),
        'iconv.internal_encoding' => array(
            '5.6' => false,
        ),
        'mbstring.http_input' => array(
            '5.6' => false,
        ),
        'mbstring.http_output' => array(
            '5.6' => false,
        ),
        'mbstring.internal_encoding' => array(
            '5.6' => false,
        ),

        'asp_tags' => array(
            '7.0' => true,
        ),
        'xsl.security_prefs' => array(
            '7.0' => true,
        ),

        'mcrypt.algorithms_dir' => array(
            '7.1' => false,
            '7.2' => true,
        ),
        'mcrypt.modes_dir' => array(
            '7.1' => false,
            '7.2' => true,
        ),
        'session.entropy_file' => array(
            '7.1' => true,
        ),
        'session.entropy_length' => array(
            '7.1' => true,
        ),
        'session.hash_function' => array(
            '7.1' => true,
        ),
        'session.hash_bits_per_character' => array(
            '7.1' => true,
        ),

        'mbstring.func_overload' => array(
            '7.2' => false,
        ),
        'sql.safe_mode' => array(
            '7.2' => true,
        ),
        'track_errors' => array(
            '7.2' => false,
        ),
        'opcache.fast_shutdown' => array(
            '7.2' => true,
        ),

        'birdstep.max_links' => array(
            '7.3' => true,
        ),
        'opcache.inherited_hack' => array(
            '5.3' => false, // Soft deprecated, i.e. ignored.
            '7.3' => true,
        ),
        'pdo_odbc.db2_instance_name' => array(
            '7.3' => false, // Has been marked as deprecated in the manual from before this time. Now hard-deprecated.
        ),
    );

    /**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array
     */
    public function register()
    {
        return array(T_STRING);
    }

    /**
     * Processes this test, when one of its tokens is encountered.
     *
     * @param \PHP_CodeSniffer_File $phpcsFile The file being scanned.
     * @param int                   $stackPtr  The position of the current token in the
     *                                         stack passed in $tokens.
     *
     * @return void
     */
    public function process(File $phpcsFile, $stackPtr)
    {
        $tokens = $phpcsFile->getTokens();

        $ignore = array(
            T_DOUBLE_COLON    => true,
            T_OBJECT_OPERATOR => true,
            T_FUNCTION        => true,
            T_CONST           => true,
        );

        $prevToken = $phpcsFile->findPrevious(T_WHITESPACE, ($stackPtr - 1), null, true);
        if (isset($ignore[$tokens[$prevToken]['code']]) === true) {
            // Not a call to a PHP function.
            return;
        }

        $functionLc = strtolower($tokens[$stackPtr]['content']);
        if (isset($this->iniFunctions[$functionLc]) === false) {
            return;
        }

        $iniToken = $this->getFunctionCallParameter($phpcsFile, $stackPtr, $this->iniFunctions[$functionLc]);
        if ($iniToken === false) {
            return;
        }

        $filteredToken = $this->stripQuotes($iniToken['raw']);
        if (isset($this->deprecatedIniDirectives[$filteredToken]) === false) {
            return;
        }

        $itemInfo = array(
            'name'       => $filteredToken,
            'functionLc' => $functionLc,
        );
        $this->handleFeature($phpcsFile, $iniToken['end'], $itemInfo);
    }


    /**
     * Get the relevant sub-array for a specific item from a multi-dimensional array.
     *
     * @param array $itemInfo Base information about the item.
     *
     * @return array Version and other information about the item.
     */
    public function getItemArray(array $itemInfo)
    {
        return $this->deprecatedIniDirectives[$itemInfo['name']];
    }


    /**
     * Retrieve the relevant detail (version) information for use in an error message.
     *
     * @param array $itemArray Version and other information about the item.
     * @param array $itemInfo  Base information about the item.
     *
     * @return array
     */
    public function getErrorInfo(array $itemArray, array $itemInfo)
    {
        $errorInfo = parent::getErrorInfo($itemArray, $itemInfo);

        // Lower error level to warning if the function used was ini_get.
        if ($errorInfo['error'] === true && $itemInfo['functionLc'] === 'ini_get') {
            $errorInfo['error'] = false;
        }

        return $errorInfo;
    }


    /**
     * Get the error message template for this sniff.
     *
     * @return string
     */
    protected function getErrorMsgTemplate()
    {
        return "INI directive '%s' is ";
    }


    /**
     * Get the error message template for suggesting an alternative for a specific sniff.
     *
     * @return string
     */
    protected function getAlternativeOptionTemplate()
    {
        return str_replace("%s", "'%s'", parent::getAlternativeOptionTemplate());
    }
}
