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Added input control and better char replacement

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This commit is contained in:
Willi Hohenstein 2022-02-14 17:38:45 +01:00
parent 0b02287378
commit 03ff8c248d
1 changed files with 19 additions and 18 deletions
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37
bookwyrm/views/search.py
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@ -130,8 +130,8 @@ def list_search(query, viewer, *_):
def isbn_check(query):
"""isbn10 or isbn13 check, if so remove separators"""
if query:
su_num = query.replace("-", "").replace(" ", "")
if len(su_num) == 13:
su_num = re.sub(r"(?<=\d)\D(?=\d|[xX])", "", query)
if len(su_num) == 13 and su_num.isdecimal():
# Multiply every other digit by 3
# Add these numbers and the other digits
product = sum(int(ch) for ch in su_num[::2]) + sum(
@ -139,20 +139,21 @@ def isbn_check(query):
)
if product % 10 == 0:
return su_num
elif len(su_num) == 10:
if su_num[0:8].isdigit() and (
su_num[9].isdigit() or su_num[9].lower() == "x"
):
product = 0
# Iterate through code_string
for i in range(9):
# for each character, multiply by a different decreasing number: 10 - x
product = product + int(su_num[i]) * (10 - i)
# Handle last character
if su_num[9].lower() == "x":
product += 10
else:
product += int(su_num[9])
if product % 11 == 0:
return su_num
elif (
len(su_num) == 10
and su_num[:-1].isdecimal()
and (su_num[-1].isdecimal() or su_num[-1].lower() == "x")
):
product = 0
# Iterate through code_string
for i in range(9):
# for each character, multiply by a different decreasing number: 10 - x
product = product + int(su_num[i]) * (10 - i)
# Handle last character
if su_num[9].lower() == "x":
product += 10
else:
product += int(su_num[9])
if product % 11 == 0:
return su_num
return query