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<?php

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class NF_Handlers_LocaleNumberFormatting

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{

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const NBSP = ' ';

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protected $locale;

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public function __construct($locale) {

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$this->locale = $locale;

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}

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public static function create() {

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global $wp_locale;

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return new self($wp_locale);

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}

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public function locale_decode_number( $number ) {

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// Be sure we have a string.

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$number = strval( $number );

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$thousands_sep = $this->locale->number_format['thousands_sep'];

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// Account for negative numbers.

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$negative = false;

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if ( '-' == substr( $number, 0, 1 ) ) {

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$negative = true;

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$number = str_replace( '-', '', $number );

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}

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// Account for a space as the thousands separator.

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$thousands_sep = str_replace( self::NBSP, ' ', $thousands_sep );

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$number = str_replace( self::NBSP, ' ', $number );

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// Determine what our existing separators are.

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$haystack = str_split( $number );

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$separators = preg_grep( '/[0-9]/', $haystack, PREG_GREP_INVERT );

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$final_separators = array_unique( $separators );

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$final_separators = array_values( $final_separators );

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switch( count( $final_separators ) ) {

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case 0:

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$formatted = $number;

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break;

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case 1:

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$replacer = '';

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if ( 1 == count( $separators ) ) {

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$separator = reset($separators);

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list($before, $after) = explode($separator, $number);

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if(3 == strlen($after) && $separator == $thousands_sep) {

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$replacer = '';

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} else {

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$replacer = '.';

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}

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}

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$formatted = str_replace( $final_separators[0], $replacer, $number );

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break;

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case 2:

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$formatted = str_replace( $final_separators[0], '', $number );

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$formatted = str_replace( $final_separators[1], '.', $formatted );

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break;

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default:

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return 'NaN';

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}

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if ( $negative ) {

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$formatted = '-' . $formatted;

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}

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return $formatted;

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}

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public function locale_encode_number( $number, $decimal = null, $thousand = null ) {

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// Be sure we have a string.

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$number = strval( $number );

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// Decode our input value.

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$number = $this->locale_decode_number( $number );

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// Exit early if NaN.

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if ( 'NaN' == $number ) return 'NaN';

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$thousands_sep = $this->locale->number_format['thousands_sep'];

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$decimal_point = $this->locale->number_format['decimal_point'];

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$thousands_sep = ( !is_null($thousand) ) ? $thousand : $thousands_sep;

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$decimal_point = ( !is_null($decimal) ) ? $decimal : $decimal_point;

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// Account for a space as the thousands separator.

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$thousands_sep = str_replace( ' ', self::NBSP, $thousands_sep );

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$precision = 0;

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if ( false !== strpos( $number, '.' ) ) {

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$tmp = explode( '.', $number );

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$precision = strlen( array_pop( $tmp ) );

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}

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$number = floatval( $number );

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return number_format( $number, $precision, $decimal_point, $thousands_sep );

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}

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public function locale_decode_equation( $eq ) {

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// Be sure we have a string.

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$eq = strval( $eq );

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$result = '';

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$expression = '';

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$pattern = '/[0-9.,]/';

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$eq = str_replace( array(' ', ' ', ' '), '', $eq );

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$characters = str_split( $eq );

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foreach ( $characters as $character ) {

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// If it matches the pattern...

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if ( preg_match( $pattern, $character ) ) {

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$expression .= $character;

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} else {

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// If we reach an operator char, append the expression to the result

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if ( 0 < strlen( $expression ) ) {

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$result .= $this->locale_decode_number( $expression );

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$expression = '';

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}

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$result .= $character;

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}

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}

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// The following catches the case of the last character being a digit.

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if ( 0 < strlen( $expression ) ) {

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$result .= $this->locale_decode_number( $expression );

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}

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return $result;

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}

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}

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