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helper/ingredient_parser

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This commit is contained in:
Tobias Lindenberg
2021-01-10 13:44:55 +01:00
parent f5b456018d
commit b59c7288b1
1 changed files with 28 additions and 14 deletions
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42
cookbook/helper/ingredient_parser.py
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@ -1,11 +1,12 @@
import unicodedata
import string
import unicodedata
def parse_fraction(x):
if len(x) == 1 and 'fraction' in unicodedata.decomposition(x):
frac_split = unicodedata.decomposition(x[-1:]).split()
return float((frac_split[1]).replace('003', '')) / float((frac_split[3]).replace('003', ''))
return (float((frac_split[1]).replace('003', ''))
/ float((frac_split[3]).replace('003', '')))
else:
frac_split = x.split('/')
if not len(frac_split) == 2:
@ -22,7 +23,17 @@ def parse_amount(x):
did_check_frac = False
end = 0
while end < len(x) and (x[end] in string.digits or ((x[end] == '.' or x[end] == ',') and end + 1 < len(x) and x[end + 1] in string.digits)):
while (
end < len(x)
and (
x[end] in string.digits
or (
(x[end] == '.' or x[end] == ',')
and end + 1 < len(x)
and x[end + 1] in string.digits
)
)
):
end += 1
if end > 0:
amount = float(x[:end].replace(',', '.'))
@ -70,13 +81,13 @@ def parse_ingredient(tokens):
while not tokens[start].startswith('(') and not start == 0:
start -= 1
if start == 0:
# the whole list is wrapped in brackets -> assume it is an error (e.g. assumed first argument was the unit)
# the whole list is wrapped in brackets -> assume it is an error (e.g. assumed first argument was the unit) # noqa: E501
raise ValueError
elif start < 0:
# no opening bracket anywhere -> just ignore the last bracket
ingredient, note = parse_ingredient_with_comma(tokens)
else:
# opening bracket found -> split in ingredient and note, remove brackets from note
# opening bracket found -> split in ingredient and note, remove brackets from note # noqa: E501
note = ' '.join(tokens[start:])[1:-1]
ingredient = ' '.join(tokens[:start])
else:
@ -99,19 +110,20 @@ def parse(x):
try:
# try to parse first argument as amount
amount, unit = parse_amount(tokens[0])
# only try to parse second argument as amount if there are at least three arguments
# if it already has a unit there can't be a fraction for the amount
# only try to parse second argument as amount if there are at least
# three arguments if it already has a unit there can't be
# a fraction for the amount
if len(tokens) > 2:
try:
if not unit == '':
# a unit is already found, no need to try the second argument for a fraction
# probably not the best method to do it, but I didn't want to make an if check and paste the exact same thing in the else as already is in the except
# a unit is already found, no need to try the second argument for a fraction # noqa: E501
# probably not the best method to do it, but I didn't want to make an if check and paste the exact same thing in the else as already is in the except # noqa: E501
raise ValueError
# try to parse second argument as amount and add that, in case of '2 1/2' or '2 ½'
# try to parse second argument as amount and add that, in case of '2 1/2' or '2 ½' # noqa: E501
amount += parse_fraction(tokens[1])
# assume that units can't end with a comma
if len(tokens) > 3 and not tokens[2].endswith(','):
# try to use third argument as unit and everything else as ingredient, use everything as ingredient if it fails
# try to use third argument as unit and everything else as ingredient, use everything as ingredient if it fails # noqa: E501
try:
ingredient, note = parse_ingredient(tokens[3:])
unit = tokens[2]
@ -122,7 +134,7 @@ def parse(x):
except ValueError:
# assume that units can't end with a comma
if not tokens[1].endswith(','):
# try to use second argument as unit and everything else as ingredient, use everything as ingredient if it fails
# try to use second argument as unit and everything else as ingredient, use everything as ingredient if it fails # noqa: E501
try:
ingredient, note = parse_ingredient(tokens[2:])
unit = tokens[1]
@ -131,11 +143,13 @@ def parse(x):
else:
ingredient, note = parse_ingredient(tokens[1:])
else:
# only two arguments, first one is the amount which means this is the ingredient
# only two arguments, first one is the amount
# which means this is the ingredient
ingredient = tokens[1]
except ValueError:
try:
# can't parse first argument as amount -> no unit -> parse everything as ingredient
# can't parse first argument as amount
# -> no unit -> parse everything as ingredient
ingredient, note = parse_ingredient(tokens)
except ValueError:
ingredient = ' '.join(tokens[1:])