aboutsummaryrefslogblamecommitdiffstats
path: root/library/intl/src/Formatter/NumberFormatter.php
blob: 0b8e2ae59946ab2fe36c4dc9192ca1819b69cd8a (plain) (tree)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406




















































































































































































































































































































































































































                                                                                                                   
<?php

namespace CommerceGuys\Intl\Formatter;

use CommerceGuys\Intl\Currency\CurrencyInterface;
use CommerceGuys\Intl\Exception\InvalidArgumentException;
use CommerceGuys\Intl\NumberFormat\NumberFormatInterface;

/**
 * Formats numbers using locale-specific patterns.
 */
class NumberFormatter implements NumberFormatterInterface
{
    /**
     * The number format.
     *
     * @var NumberFormatInterface
     */
    protected $numberFormat;

    /**
     * The number pattern used to format positive numbers.
     *
     * @var string
     */
    protected $positivePattern;

    /**
     * The number pattern used to format negative numbers.
     *
     * @var string
     */
    protected $negativePattern;

    /**
     * Whether grouping is used.
     *
     * @var bool
     */
    protected $groupingUsed;

    /**
     * The size of the group of digits closest to the decimal point.
     *
     * @var int
     */
    protected $primaryGroupSize;

    /**
     * The size of every group of digits after the primary group.
     *
     * @var int
     */
    protected $secondaryGroupSize;

    /**
     * The minimum number of fraction digits to show.
     *
     * @var int
     */
    protected $minimumFractionDigits;

    /**
     * The maximum number of fraction digits to show.
     *
     * @var int
     */
    protected $maximumFractionDigits;

    /**
     * The currency display style.
     *
     * @var int
     */
    protected $currencyDisplay;

    /**
     * Localized digits.
     *
     * @var array
     */
    protected $digits = array(
        NumberFormatInterface::NUMBERING_SYSTEM_ARABIC => array(
            0 => '٠', 1 => '١', 2 => '٢', 3 => '٣', 4 => '٤',
            5 => '٥', 6 => '٦', 7 => '٧', 8 => '٨', 9 => '٩',
        ),
        NumberFormatInterface::NUMBERING_SYSTEM_ARABIC_EXTENDED => array(
            0 => '۰', 1 => '۱', 2 => '۲', 3 => '۳', 4 => '۴',
            5 => '۵', 6 => '۶', 7 => '۷', 8 => '۸', 9 => '۹',
        ),
        NumberFormatInterface::NUMBERING_SYSTEM_BENGALI => array(
            0 => '০', 1 => '১', 2 => '২', 3 => '৩', 4 => '৪',
            5 => '৫', 6 => '৬', 7 => '৭', 8 => '৮', 9 => '৯',
        ),
        NumberFormatInterface::NUMBERING_SYSTEM_DEVANAGARI => array(
            0 => '०', 1 => '१', 2 => '२', 3 => '३', 4 => '४',
            5 => '५', 6 => '६', 7 => '७', 8 => '८', 9 => '९',
        ),
    );

    /**
     * Creaes a NumberFormatter instance.
     *
     * @param NumberFormatInterface $numberFormat The number format.
     * @param int                   $style        The formatting style.
     *
     * @throws InvalidArgumentException
     */
    public function __construct(NumberFormatInterface $numberFormat, $style = self::DECIMAL)
    {
        $availablePatterns = array(
            self::DECIMAL => $numberFormat->getDecimalPattern(),
            self::PERCENT => $numberFormat->getPercentPattern(),
            self::CURRENCY => $numberFormat->getCurrencyPattern(),
            self::CURRENCY_ACCOUNTING => $numberFormat->getAccountingCurrencyPattern(),
        );
        if (!array_key_exists($style, $availablePatterns)) {
            // Unknown type.
            throw new InvalidArgumentException('Unknown format style provided to NumberFormatter::__construct().');
        }

        // Split the selected pattern into positive and negative patterns.
        $patterns = explode(';', $availablePatterns[$style]);
        if (!isset($patterns[1])) {
            // No explicit negative pattern was provided, construct it.
            $patterns[1] = '-' . $patterns[0];
        }

        $this->numberFormat = $numberFormat;
        $this->positivePattern = $patterns[0];
        $this->negativePattern = $patterns[1];
        $this->groupingUsed = (strpos($this->positivePattern, ',') !== false);
        // This pattern has number groups, parse them.
        if ($this->groupingUsed) {
            preg_match('/#+0/', $this->positivePattern, $primaryGroupMatches);
            $this->primaryGroupSize = $this->secondaryGroupSize = strlen($primaryGroupMatches[0]);
            $numberGroups = explode(',', $this->positivePattern);
            if (count($numberGroups) > 2) {
                // This pattern has a distinct secondary group size.
                $this->secondaryGroupSize = strlen($numberGroups[1]);
            }
        }

        // Initialize the fraction digit settings for decimal and percent
        // styles only. The currency ones will default to the currency values.
        if (in_array($style, array(self::DECIMAL, self::PERCENT))) {
            $this->minimumFractionDigits = 0;
            $this->maximumFractionDigits = 3;
        }
        $this->currencyDisplay = self::CURRENCY_DISPLAY_SYMBOL;
    }

    /**
     * {@inheritdoc}
     */
    public function format($value)
    {
        if (!is_numeric($value)) {
            $message = sprintf('The provided value "%s" must be a valid number or numeric string.', $value);
            throw new InvalidArgumentException($message);
        }

        // Ensure that the value is positive and has the right number of digits.
        $negative = (bccomp('0', $value, 12) == 1);
        $signMultiplier = $negative ? '-1' : '1';
        $value = bcdiv($value, $signMultiplier, $this->maximumFractionDigits);
        // Split the number into major and minor digits.
        $valueParts = explode('.', $value);
        $majorDigits = $valueParts[0];
        // Account for maximumFractionDigits = 0, where the number won't
        // have a decimal point, and $valueParts[1] won't be set.
        $minorDigits = isset($valueParts[1]) ? $valueParts[1] : '';

        if ($this->groupingUsed) {
            // Reverse the major digits, since they are grouped from the right.
            $majorDigits = array_reverse(str_split($majorDigits));
            // Group the major digits.
            $groups = array();
            $groups[] = array_splice($majorDigits, 0, $this->primaryGroupSize);
            while (!empty($majorDigits)) {
                $groups[] = array_splice($majorDigits, 0, $this->secondaryGroupSize);
            }
            // Reverse the groups and the digits inside of them.
            $groups = array_reverse($groups);
            foreach ($groups as &$group) {
                $group = implode(array_reverse($group));
            }
            // Reconstruct the major digits.
            $majorDigits = implode(',', $groups);
        }

        if ($this->minimumFractionDigits < $this->maximumFractionDigits) {
            // Strip any trailing zeroes.
            $minorDigits = rtrim($minorDigits, '0');
            if (strlen($minorDigits) < $this->minimumFractionDigits) {
                // Now there are too few digits, re-add trailing zeroes
                // until the desired length is reached.
                $neededZeroes = $this->minimumFractionDigits - strlen($minorDigits);
                $minorDigits .= str_repeat('0', $neededZeroes);
            }
        }

        // Assemble the final number and insert it into the pattern.
        $value = $minorDigits ? $majorDigits . '.' . $minorDigits : $majorDigits;
        $pattern = $negative ? $this->negativePattern : $this->positivePattern;
        $value = preg_replace('/#(?:[\.,]#+)*0(?:[,\.][0#]+)*/', $value, $pattern);

        // Localize the number.
        $value = $this->replaceDigits($value);
        $value = $this->replaceSymbols($value);

        return $value;
    }

    /**
     * {@inheritdoc}
     */
    public function formatCurrency($value, CurrencyInterface $currency)
    {
        // Use the currency defaults if the values weren't set by the caller.
        $resetMinimumFractionDigits = $resetMaximumFractionDigits = false;
        if (!isset($this->minimumFractionDigits)) {
            $this->minimumFractionDigits = $currency->getFractionDigits();
            $resetMinimumFractionDigits = true;
        }
        if (!isset($this->maximumFractionDigits)) {
            $this->maximumFractionDigits = $currency->getFractionDigits();
            $resetMaximumFractionDigits = true;
        }

        // Format the decimal part of the value first.
        $value = $this->format($value);

        // Reset the fraction digit settings, so that they don't affect
        // future formattings with different currencies.
        if ($resetMinimumFractionDigits) {
            $this->minimumFractionDigits = null;
        }
        if ($resetMaximumFractionDigits) {
            $this->maximumFractionDigits = null;
        }

        // Determine whether to show the currency symbol or the currency code.
        if ($this->currencyDisplay == self::CURRENCY_DISPLAY_SYMBOL) {
            $symbol = $currency->getSymbol();
        } else {
            $symbol = $currency->getCurrencyCode();
        }

        return str_replace('¤', $symbol, $value);
    }

    /**
     * {@inheritdoc}
     */
    public function parseCurrency($value, CurrencyInterface $currency)
    {
        $replacements = array(
            // Convert the localized symbols back to their original form.
            $this->numberFormat->getDecimalSeparator() => '.',
            $this->numberFormat->getPlusSign() => '+',
            $this->numberFormat->getMinusSign() => '-',

            // Strip any grouping separators, the currency code or symbol.
            $this->numberFormat->getGroupingSeparator() => '',
            $currency->getCurrencyCode() => '',
            $currency->getSymbol() => '',

            // Strip whitespace (spaces and non-breaking spaces).
            ' ' => '',
            chr(0xC2) . chr(0xA0) => '',
        );
        $numberingSystem = $this->numberFormat->getNumberingSystem();
        if (isset($this->digits[$numberingSystem])) {
            // Convert the localized digits back to latin.
            $replacements += array_flip($this->digits[$numberingSystem]);
        }

        $value = strtr($value, $replacements);
        if (substr($value, 0, 1) == '(' && substr($value, -1, 1) == ')') {
            // This is an accounting formatted negative number.
            $value = '-' . str_replace(array('(', ')'), '', $value);
        }

        return is_numeric($value) ? $value : false;
    }

    /**
     * Replaces digits with their localized equivalents.
     *
     * @param string $value The value being formatted.
     *
     * @return string
     */
    protected function replaceDigits($value)
    {
        $numberingSystem = $this->numberFormat->getNumberingSystem();
        if (isset($this->digits[$numberingSystem])) {
            $value = strtr($value, $this->digits[$numberingSystem]);
        }

        return $value;
    }

    /**
     * Replaces number symbols with their localized equivalents.
     *
     * @param string $value The value being formatted.
     *
     * @return string
     *
     * @see http://cldr.unicode.org/translation/number-symbols
     */
    protected function replaceSymbols($value)
    {
        $replacements = array(
            '.' => $this->numberFormat->getDecimalSeparator(),
            ',' => $this->numberFormat->getGroupingSeparator(),
            '+' => $this->numberFormat->getPlusSign(),
            '-' => $this->numberFormat->getMinusSign(),
            '%' => $this->numberFormat->getPercentSign(),
        );

        return strtr($value, $replacements);
    }

    /**
     * {@inheritdoc}
     */
    public function getNumberFormat()
    {
        return $this->numberFormat;
    }

    /**
     * {@inheritdoc}
     */
    public function getMinimumFractionDigits()
    {
        return $this->minimumFractionDigits;
    }

    /**
     * {@inheritdoc}
     */
    public function setMinimumFractionDigits($minimumFractionDigits)
    {
        $this->minimumFractionDigits = $minimumFractionDigits;

        return $this;
    }

    /**
     * {@inheritdoc}
     */
    public function getMaximumFractionDigits()
    {
        return $this->maximumFractionDigits;
    }

    /**
     * {@inheritdoc}
     */
    public function setMaximumFractionDigits($maximumFractionDigits)
    {
        $this->maximumFractionDigits = $maximumFractionDigits;

        return $this;
    }

    /**
     * {@inheritdoc}
     */
    public function isGroupingUsed()
    {
        return $this->groupingUsed;
    }

    /**
     * {@inheritdoc}
     */
    public function setGroupingUsed($groupingUsed)
    {
        $this->groupingUsed = $groupingUsed;

        return $this;
    }

    /**
     * {@inheritdoc}
     */
    public function getCurrencyDisplay()
    {
        return $this->currencyDisplay;
    }

    /**
     * {@inheritdoc}
     */
    public function setCurrencyDisplay($currencyDisplay)
    {
        $this->currencyDisplay = $currencyDisplay;

        return $this;
    }
}