From da30c3c9b36b90e8c7c77ea853872b2723a7d1f8 Mon Sep 17 00:00:00 2001
From: Eren Golge <egolge@mozilla.com>
Date: Wed, 21 Nov 2018 17:06:10 +0100
Subject: [PATCH] change numbers.py to number_norm.py

---
 utils/text/number_norm.py | 129 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 129 insertions(+)
 create mode 100644 utils/text/number_norm.py

diff --git a/utils/text/number_norm.py b/utils/text/number_norm.py
new file mode 100644
index 00000000..9cc6f4df
--- /dev/null
+++ b/utils/text/number_norm.py
@@ -0,0 +1,129 @@
+import re
+
+_comma_number_re = re.compile(r'([0-9][0-9\,]+[0-9])')
+_decimal_number_re = re.compile(r'([0-9]+\.[0-9]+)')
+_pounds_re = re.compile(r'£([0-9\,]*[0-9]+)')
+_dollars_re = re.compile(r'\$([0-9\.\,]*[0-9]+)')
+_ordinal_re = re.compile(r'([0-9]+)(st|nd|rd|th)')
+_number_re = re.compile(r'[0-9]+')
+
+_units = [
+    '', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine',
+    'ten', 'eleven', 'twelve', 'thirteen', 'fourteen', 'fifteen', 'sixteen',
+    'seventeen', 'eighteen', 'nineteen'
+]
+
+_tens = [
+    '',
+    'ten',
+    'twenty',
+    'thirty',
+    'forty',
+    'fifty',
+    'sixty',
+    'seventy',
+    'eighty',
+    'ninety',
+]
+
+_digit_groups = [
+    '',
+    'thousand',
+    'million',
+    'billion',
+    'trillion',
+    'quadrillion',
+]
+
+_ordinal_suffixes = [
+    ('one', 'first'),
+    ('two', 'second'),
+    ('three', 'third'),
+    ('five', 'fifth'),
+    ('eight', 'eighth'),
+    ('nine', 'ninth'),
+    ('twelve', 'twelfth'),
+    ('ty', 'tieth'),
+]
+
+
+def _remove_commas(m):
+    return m.group(1).replace(',', '')
+
+
+def _expand_decimal_point(m):
+    return m.group(1).replace('.', ' point ')
+
+
+def _expand_dollars(m):
+    match = m.group(1)
+    parts = match.split('.')
+    if len(parts) > 2:
+        return match + ' dollars'  # Unexpected format
+    dollars = int(parts[0]) if parts[0] else 0
+    cents = int(parts[1]) if len(parts) > 1 and parts[1] else 0
+    if dollars and cents:
+        dollar_unit = 'dollar' if dollars == 1 else 'dollars'
+        cent_unit = 'cent' if cents == 1 else 'cents'
+        return '%s %s, %s %s' % (dollars, dollar_unit, cents, cent_unit)
+    elif dollars:
+        dollar_unit = 'dollar' if dollars == 1 else 'dollars'
+        return '%s %s' % (dollars, dollar_unit)
+    elif cents:
+        cent_unit = 'cent' if cents == 1 else 'cents'
+        return '%s %s' % (cents, cent_unit)
+    else:
+        return 'zero dollars'
+
+
+def _standard_number_to_words(n, digit_group):
+    parts = []
+    if n >= 1000:
+        # Format next higher digit group.
+        parts.append(_standard_number_to_words(n // 1000, digit_group + 1))
+        n = n % 1000
+
+    if n >= 100:
+        parts.append('%s hundred' % _units[n // 100])
+    if n % 100 >= len(_units):
+        parts.append(_tens[(n % 100) // 10])
+        parts.append(_units[(n % 100) % 10])
+    else:
+        parts.append(_units[n % 100])
+    if n > 0:
+        parts.append(_digit_groups[digit_group])
+    return ' '.join([x for x in parts if x])
+
+
+def _number_to_words(n):
+    # Handle special cases first, then go to the standard case:
+    if n >= 1000000000000000000:
+        return str(n)  # Too large, just return the digits
+    elif n == 0:
+        return 'zero'
+    elif n % 100 == 0 and n % 1000 != 0 and n < 3000:
+        return _standard_number_to_words(n // 100, 0) + ' hundred'
+    else:
+        return _standard_number_to_words(n, 0)
+
+
+def _expand_number(m):
+    return _number_to_words(int(m.group(0)))
+
+
+def _expand_ordinal(m):
+    num = _number_to_words(int(m.group(1)))
+    for suffix, replacement in _ordinal_suffixes:
+        if num.endswith(suffix):
+            return num[:-len(suffix)] + replacement
+    return num + 'th'
+
+
+def normalize_numbers(text):
+    text = re.sub(_comma_number_re, _remove_commas, text)
+    text = re.sub(_pounds_re, r'\1 pounds', text)
+    text = re.sub(_dollars_re, _expand_dollars, text)
+    text = re.sub(_decimal_number_re, _expand_decimal_point, text)
+    text = re.sub(_ordinal_re, _expand_ordinal, text)
+    text = re.sub(_number_re, _expand_number, text)
+    return text