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<?php
/**
*/

if (isset($_SERVER['APP_MODE']) && $_SERVER['APP_MODE'] !== 'prod') {
    ini_set('error_reporting', E_ALL);
    ini_set('show_errors', true);
    ini_set('display_errors', true);
} else {
    ini_set('error_reporting', FALSE);
    ini_set('show_errors', FALSE);
    ini_set('display_errors', FALSE);
    ini_set('log_errors', FALSE);
}

include '../langs.php';

/**
 * Diff two .lang files, to get:
 * - strings count of each
 * - missing strings (in $a, not in $b)
 * - extra strings (in $b, not in $a)
 * - untranslated strings (same in $a and $b, or empty in $b)
 * - duplicate strings in $b
 *
 * @param string $a file name
 * @param string $b file name
 *
 * @return array
*/
function _lang_diff($a, $b)
{
    $fa = i18n::_lang_return($a);
    $fb = i18n::_lang_return($b, true); // option to return duplicates
    $duplicates = (isset($fb['duplicates']) ? array_pop($fb) : null);

/*    $ret = array(
        'aCount' => count($fa),
        'bCount' => count($fb),
        'diff'   => count($fa) - count($fb),
    ); unused var */
    $missing = array();
    $notrans = array();

    $ka = array_keys($fa);
    $kb = array_keys($fb);

    $missing = array_diff($ka, $kb);
    $extra   = array_diff($kb, $ka);

    // search for untranslated strings
    foreach ($fa as $k => $v) {
        if (array_key_exists($k, $fb)) {
            if ($v == $fb[$k] || '' == $fb[$k]) {
                $notrans[] = $k;
            }
        }
    }

    return array(
        'a_name'  => $a,
        'b_name'  => $b,
        'a'       => count($fa),
        'b'       => count($fb),
        'missing' => $missing,
        'notrans' => $notrans,
        'extra'   => $extra,
        'dup_str' => $duplicates,
    );
}

/**
 * Diff pot and po files, to get:
 * - source (pot) strings count
 * - missing strings in target
 * - untranslated strings in target
 * - empty array for extra and duplicate strings for backward compatibility
 *
 * @param string $locale locale name ('sl')
 * @param string $resource file name ('about/license')
 * @param array  $source_l array with source file strings (to avoid duplicated parsing)
 * @param string $path directly passed path for nonlocal files
 *
 * @return array
*/
function _po_diff($locale, $resource, $source_l = NULL, $path = NULL)
{
    if (is_null($path)) {
        if (NULL == $source_l) {
            $source_l = read_translation_file('en', $resource);
        }
        $target_l = read_translation_file($locale, $resource);
    } else {
        if (NULL == $source_l) {
            $source_path_filename = sprintf('%s/%s.pot', $path, $resource);
            $source_l = phpmo_parse_po_file($source_path_filename);
        }
        if ('en' == $locale) {
            $target_l = $source_l;
        } else {
            $locale = locale_hyphen_underscore($locale, true);
            $target_path_filename = sprintf('%s/%s.po', $path, $locale);
            $target_l = phpmo_parse_po_file($target_path_filename);
        }
    }

    $pot_strings      = array();
    $untrans          = array();
    $fuzzy_or_missing = array();
    $num_of_original_strings = 0;

    if (FALSE != $source_l) {
        foreach ($source_l as $escaped_string => $subarray) {
            if (!empty($subarray["msgid"])) { // filter out header
                $msgctxt = array();
                foreach ($subarray["msgstr"] as $key => $unused) {
                    if (isset($subarray["msgctxt"][$key])) {
                        $msgctxt[$key] = $subarray["msgctxt"][$key];
                    } else {
                        $msgctxt[$key] = TRUE;
                    }
                    $num_of_original_strings++;
                }
                $pot_strings[$escaped_string] = $msgctxt;
            }
        }
    }

    $fuzzy_or_missing = $pot_strings;
    $untrans          = $pot_strings;

    if (FALSE != $target_l) {
        foreach ($target_l as $escaped_string => $subarray) {
            if (!empty($subarray["msgid"])) { // filter out header
                foreach ($subarray["msgstr"] as $key => $msgstr) {
                    // remove present string
                    unset($fuzzy_or_missing[$escaped_string][$key]);
                    if (!empty($msgstr)) {
                        // remove translated string
                        if(is_array($msgstr)) { // are there any plural strings present?
                            $erase_plural_key = TRUE;
                            foreach ($msgstr as $nplural) {
                                if (empty($nplural)) {
                                    $erase_plural_key = FALSE;
                                }
                            }
                            // if all plural keys are translated, remove msgstr for that msgid
                            if ($erase_plural_key) {
                                unset($untrans[$escaped_string][$key]);
                            }
                        } else {
                            unset($untrans[$escaped_string][$key]);
                        }
                    }
                }
            }
        }
    }

    $arrays = array($fuzzy_or_missing, $untrans);
    foreach ($arrays as &$current_array) {
        $strings = array();
        $cnt = 0;
        foreach ($current_array as $escaped_string => $msgctxt) {
            if(!empty($msgctxt)) {
                $keys = array_keys($msgctxt);
                if(is_numeric($keys[0])) {
                    $index = $cnt;
                } else {
                    $index = $keys[0];
                }
                $strings[$index] = $escaped_string;
                $cnt++;
            }
        }
        $current_array = $strings;
    }
    unset($current_array);

    list($fuzzy_or_missing, $untrans) = $arrays;
    $untrans = array_diff($untrans, $fuzzy_or_missing);

    return array(
        'a'                => $num_of_original_strings, // # of original strings
//      'b'                => count($po_strings), // # of target strings
        'source_strings'   => $source_l, // array of original strings
        'fuzzy_or_missing' => $fuzzy_or_missing, // array of fuzzy or missing strings
        'notrans'          => $untrans, // array of untranslated strings
        'extra'            => array(),
        'dup_str'          => array(),
    );
}

/**
 * Diff English and translated ts files, to get:
 * - source (ts) strings count
 * - missing strings in target
 * - untranslated strings in target
 * - empty array for extra and duplicate strings for backward compatibility
 *
 * @param string $locale locale name ('sl')
 * @param string $resource file name ('mageiaSync')
 * @param array  $source_l array with source file strings (to avoid duplicated parsing)
 * @param string $path directly passed path for nonlocal files
 *
 * @return array
*/
function _ts_diff($locale, $resource, $source_l = NULL, $path = NULL)
{
    $source_path_filename = sprintf('%s%s_%s.ts', $path, $resource, $locale); // mageiaSync_sl.ts
    $source_strings       = array();
    $untranslated_strings = array();
    $obsoleted_strings    = array();
    // read .ts file
    $file_handle = @fopen($source_path_filename, 'r');
    if ($file_handle === false) {
        // Could not open file resource
        return false;
    }

    // iterate over lines
    while(($line = fgets($file_handle, 65536)) !== false) {
        // count <source>???</source> lines
        if (false !== strpos($line, '</source>')) {
            preg_match_all("/(<source>)([a-z_A-Z@-]+)(<\/source>)/", $line, $source_string);
            $source_strings[] = $source_string[2];
        }
        // count <translation type="unfinished"></translation> lines
        if (false !== strpos($line, '<translation type="unfinished"')) {
            $untranslated_strings[] = $source_string[2];
        }
        // count <translation type="obsolete"></translation> lines
        if (false !== strpos($line, '<translation type="obsolete"')) {
            array_pop($source_strings); // subtract obsoleted source strings
            $obsoleted_strings[] = $source_string[2];
        }
    }
    fclose($file_handle);

    return array(
        'a'                => count($source_strings), // # of original strings
//      'b'                => , // # of target strings
        'source_strings'   => $source_strings, // array of original strings
        'fuzzy_or_missing' => array(), // array of fuzzy or missing strings
        'notrans'          => $untranslated_strings, // array of untranslated strings
        'extra'            => $obsoleted_strings,
        'dup_str'          => array(),
    );
}

/*function _lang_diff_stats($a, $b)
{
    $diff = _lang_diff($a, $b);

    $diff['missing'] = count($diff['missing']);
    $diff['notrans'] = count($diff['notrans']);
    $diff['extra']   = count($diff['extra']);
    $diff['ok']      = (($diff['b'] - $diff['a']) == 0) ? true : false;
    $diff['correct'] = $diff['b'] - $diff['notrans'] - $diff['missing'];

    return $diff;
} /**/

if ( ! function_exists('glob_recursive'))
{
    // Does not support flag GLOB_BRACE

    function glob_recursive($pattern, $flags = 0)
    {
        $files = glob($pattern, $flags);

//      removing dirs from $files as they are not files ;)
        $files_wo_dirs = array();
        foreach ($files as $single_file) {
            $single_file_as_string = str_split($single_file);
            $last_sign = array_pop($single_file_as_string);
            if($last_sign != '/') {
                $files_wo_dirs[] = $single_file;
            };
        }
        $files = $files_wo_dirs;

        foreach (glob(dirname($pattern).'/*', GLOB_ONLYDIR|GLOB_NOSORT) as $dir)
        {
			$files = array_merge($files, glob_recursive($dir.'/'.basename($pattern), $flags));
        }

        return $files;
    }
}

/**
 * Create 'sl/about/license.sl.lang'
 * from 'en/about/license.en.lang'
 * or ../_nav/langs/sl.lang
 * from ../_nav/langs/en.lang
 *
 * @param string $s file name with path
 * @param string $l locale name
 *
 * @return string
*/
function _lang_file_switch($s, $l)
{
    $s = str_replace('en.lang', $l . '.lang', $s);
    return str_replace('en/', $l . '/', $s);
}

/**
 * Create 'sl/about/license.po'
 * from 'en/about/license.pot'
 * or ../_nav/langs/sl.po
 * from ../_nav/langs/en.pot
 *
 * @param string $s file name with path
 * @param string $l locale name
 *
 * @return string
*/
function _po_file_switch($s, $l)
{
    if($l != 'en') {
        $s = str_replace('.pot', '.po', $s);
    }
    $s = str_replace('/en.', '/' . $l . '.', $s);
    return str_replace('en/', $l . '/', $s);
}

/**
 * Create 'about/license'
 * from 'en/about/license.pot' or 'en/about/license.en.lang'
 *
 * @param string $source_file file name with path
 * @param string $extension file extension to remove
 *
 * @return string
*/
function _extract_resource($source_file, $extension = '.pot')
{
    $resource = str_replace($extension, '', $source_file);
    return str_replace('en/', '', $resource);
}

function get_lang_references($pattern = '*')
{
    return glob_recursive('en/' . $pattern, GLOB_MARK);
}

function get_other_langs()
{
    $ls = glob('*');
    $re = array();
    foreach ($ls as $l) {
        if (!is_dir($l)) continue;
        if ($l == 'en') continue;
        $re[] = $l;
    }
    array_unshift($re, 'en');
    return $re;
}

function aproximate_number_of_untranslated_constitution_lines($app_root, $lang, $unique_lines_in_eng_constitution = array())
{
    $constitution_readable = FALSE;
    $dest_constitution = sprintf('%s/%s/%s/%s_%s.md', $app_root, $lang, 'about/constitution', 'mageia.org_statutes', $lang);
    $number_of_unique_lines_in_eng_constitution = count($unique_lines_in_eng_constitution);
    $aproximate_number_of_untranslated_lines = 0;
    if(is_readable($dest_constitution)) {
        $unique_lines_in_constitution = array_unique(file($dest_constitution));
        $number_of_unique_lines_in_constitution = count($unique_lines_in_constitution);
        $constitution_readable = TRUE;
        if ($lang == 'en') {
            $aproximate_number_of_untranslated_lines = $number_of_unique_lines_in_constitution;
            $untranslated_lines_in_constitution      = array();
        } else {
            $untranslated_lines_in_constitution = array_intersect($unique_lines_in_eng_constitution, $unique_lines_in_constitution);
            $number_of_nonunique_lines_lang_constitution = count($untranslated_lines_in_constitution);
            $ratio = $number_of_nonunique_lines_lang_constitution / $number_of_unique_lines_in_eng_constitution;
            $limit_ratio = 0.15; // limit ratio of "allowed" untranslated lines
            if ($ratio > $limit_ratio) {
                // add aproximate number of untranslated constitution lines
                $aproximate_number_of_untranslated_lines = $number_of_nonunique_lines_lang_constitution - round($limit_ratio * $number_of_unique_lines_in_eng_constitution);
            }
        }
    } else {
        $unique_lines_in_constitution             = $unique_lines_in_eng_constitution;
        $aproximate_number_of_untranslated_lines  = $number_of_unique_lines_in_eng_constitution;
        $untranslated_lines_in_constitution       = $unique_lines_in_eng_constitution;
    }

    return array(
        'unique_lines_in_constitution'            => $unique_lines_in_constitution,
        'constitution_readable'                   => $constitution_readable,
        'untranslated_lines_in_constitution'      => $untranslated_lines_in_constitution,
        'aproximate_number_of_untranslated_lines' => $aproximate_number_of_untranslated_lines,
    );
}

function build_language_and_resource_summary($report, $all_languages_only_one_resource = FALSE, $one_resource = NULL, $one_language_all_resources = FALSE, $one_language = NULL)
{
    $total_num_of_strings = 0; // total of all source strings
    $language_summary = array();
    $resource_summary = array();
    foreach ($report as $resource_data) {
        if ($resource_data['language'] == 'en') {
            $total_num_of_strings += $resource_data['num_of_all_strings'];
        }
        // don't add if there is a need to store languages only for one resource
        if(!$all_languages_only_one_resource || $resource_data['resource_filename'] == $one_resource) {
            $key_exists = recursive_array_search($resource_data['language'], $language_summary); // is language already in the $language_summary array?
            if($resource_data['resource_filename'] == $one_resource) {
                $temp_var[0]['language']                        = $resource_data['language'];
                $temp_var[0]['num_of_all_strings']              = $resource_data['num_of_all_strings'];
                $temp_var[0]['num_of_fuzzy_or_missing_strings'] = $resource_data['num_of_fuzzy_or_missing_strings'];
                $temp_var[0]['num_of_untranslated_strings']     = $resource_data['num_of_untranslated_strings'];
                $temp_var[0]['references']                      = $resource_data['references'];
                $language_summary[] = $temp_var[0];
                unset($temp_var[0]); // clear var
            } else {
                if ($key_exists !== FALSE) {
                    $language_summary[$key_exists]['num_of_all_strings']              += $resource_data['num_of_all_strings'];
                    $language_summary[$key_exists]['num_of_fuzzy_or_missing_strings'] += $resource_data['num_of_fuzzy_or_missing_strings'];
                    $language_summary[$key_exists]['num_of_untranslated_strings']     += $resource_data['num_of_untranslated_strings'];
                } else {
                    if($key_exists === FALSE) {
                        $key_exists = count($language_summary);
                    }
                    $language_summary[$key_exists]['language']                         = $resource_data['language'];
                    $language_summary[$key_exists]['num_of_all_strings']               = $resource_data['num_of_all_strings'];
                    $language_summary[$key_exists]['num_of_fuzzy_or_missing_strings']  = $resource_data['num_of_fuzzy_or_missing_strings'];
                    $language_summary[$key_exists]['num_of_untranslated_strings']      = $resource_data['num_of_untranslated_strings'];
                    $language_summary[$key_exists]['references']                       = $resource_data['references'];
                }
            }
        }

        // don't add if there is a need to store resources only for one language
        if(!$one_language_all_resources || ($resource_data['language'] == $one_language || $resource_data['language'] == 'en')) {
            $key_exists = recursive_array_search($resource_data['resource_filename'], $resource_summary); // is resource already in the $resource_summary array?
            if($resource_data['language'] == 'en') {
                $temp_var[0]['resource_filename']               = $resource_data['resource_filename'];
                $temp_var[0]['num_of_all_strings']              = $resource_data['num_of_all_strings'];
                $temp_var[0]['num_of_fuzzy_or_missing_strings'] = $resource_data['num_of_fuzzy_or_missing_strings'];
                $temp_var[0]['num_of_untranslated_strings']     = $resource_data['num_of_untranslated_strings'];
                $temp_var[0]['references']                      = $resource_data['references'];
                $resource_summary[] = $temp_var[0];
                unset($temp_var[0]); // clear var
            } else {
                if($one_language_all_resources) {
                    if($key_exists === FALSE) {
                        $key_exists = count($resource_summary);
                    }
                    $resource_summary[$key_exists]['num_of_fuzzy_or_missing_strings']  = $resource_data['num_of_fuzzy_or_missing_strings'];
                    $resource_summary[$key_exists]['num_of_untranslated_strings']      = $resource_data['num_of_untranslated_strings'];
                    $resource_summary[$key_exists]['references']                       = $resource_data['references'];
                } else if ($key_exists !== FALSE) {
                    $resource_summary[$key_exists]['num_of_all_strings']              += $resource_data['num_of_all_strings'];
                    $resource_summary[$key_exists]['num_of_fuzzy_or_missing_strings'] += $resource_data['num_of_fuzzy_or_missing_strings'];
                    $resource_summary[$key_exists]['num_of_untranslated_strings']     += $resource_data['num_of_untranslated_strings'];
                }
            }
        }
    }
    foreach ($language_summary as &$single_language_summary) {
        $single_language_summary['num_of_translated_strings'] = 
            $single_language_summary['num_of_all_strings'] -
            $single_language_summary['num_of_fuzzy_or_missing_strings'] -
            $single_language_summary['num_of_untranslated_strings'];
    }
    unset($single_language_summary); // foreach by reference
    foreach ($resource_summary as &$single_resource_summary) {
        $single_resource_summary['num_of_translated_strings'] = 
            $single_resource_summary['num_of_all_strings'] -
            $single_resource_summary['num_of_fuzzy_or_missing_strings'] -
            $single_resource_summary['num_of_untranslated_strings'];
    }
    unset($single_resource_summary); // foreach by reference

    return array(
        'total_num_of_strings' => $total_num_of_strings, // total of all source strings
        'language_summary'     => $language_summary,
        'resource_summary'     => $resource_summary,
    );
}

/**
 * from http://www.php.net/manual/en/function.array-search.php#91365
 *
 * copyright (c) the PHP Documentation
 * covered by the Creative Commons Attribution 3.0 License (http://creativecommons.org/licenses/by/3.0/legalcode)
*/
function recursive_array_search($needle, $haystack)
{
    foreach ($haystack as $key => $value) {
        $current_key = $key;
        if ($needle === $value OR (is_array($value) && recursive_array_search($needle, $value) !== FALSE)) {
            return $current_key;
        }
    }
    return FALSE;
}