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https://github.com/Xevion/exercism.git
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ledger exercise
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Xevion
@@ -1,262 +1,64 @@
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# -*- coding: utf-8 -*-
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from datetime import datetime
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# Currency formatters
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def ENUS_(v, c): v /= 100.0; return ('(' if v < 0 else ' ') + c + format(abs(v), ',.2f') + (')' if v < 0 else ' ')
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def NLNL_(v, c): v /= 100.0; return c + (' -' if v < 0 else ' ') + format(abs(v), ',.2f').translate(str.maketrans(',.', '.,')) + ' '
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class LedgerEntry(object):
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def __init__(self, date, description, change):
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self.date, self.description, self.change = date, description, change
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# Date formatters (could be made intro a format creator which is called in locales dict)
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def MDY_(date): return "{}/{}/{}".format(str(date.month).zfill(2), str(date.day).zfill(2), str(date.year).zfill(4))
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def DMY_(date): return "{}-{}-{}".format(str(date.day).zfill(2), str(date.month).zfill(2), str(date.year).zfill(4))
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locales = {
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'en_US' : {
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'date' : 'Date',
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'desc' : 'Description',
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'change' : 'Change'
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'change' : 'Change',
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'date_formatter' : MDY_,
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'currency_formatter' : ENUS_
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},
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'nl_NL' : {
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'date' : 'Datum',
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'desc' : 'Omschrijving',
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'change' : 'Verandering'
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}
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'change' : 'Verandering',
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'date_formatter' : DMY_,
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'currency_formatter' : NLNL_
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},
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}
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currencies = {
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locales_currency = {
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'USD' : '$',
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'EUR' : '€'
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'EUR' : u'€'
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}
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class LedgerEntry(object):
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def __init__(self, date, description, change):
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self.date, self.description, self.change = date, description, change
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def create_entry(date, description, change):
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return LedgerEntry(datetime.strptime(date, '%Y-%m-%d'), description, change)
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def format_entries(currency, locale, entries):
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if locale == 'en_US':
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# Generate Header Row
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table = ' | '.join([locales[locale]['date'].ljust(10), locales[locale]['desc'].ljust(25), locales[locale]['change'].ljust(13)])
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table = []
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entries.sort(key=lambda item : (item.date, item.change))
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# Table header.
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table.append(' | '.join([
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locales[locale]['date'].ljust(10),
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locales[locale]['desc'].ljust(25),
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locales[locale]['change'].ljust(13)]
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))
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while len(entries) > 0:
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table += '\n'
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entry = entries.pop(0)
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# Sort entries to ring out by date, then by change amount
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entries.sort(key=lambda item : (item.date, item.change))
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date_str = "{}/{}/{}".format(str(entry.date.month).zfill(2), str(entry.date.day).zfill(2), str(entry.date.year).zfill(4))
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table += date_str + ' | '
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# Process all entries given
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for entry in entries:
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# Using the locale given, get it's date formatter
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date = locales[locale]['date_formatter'](entry.date)
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# Truncate description
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description = (entry.description[:22] + '...' if len(entry.description) > 25 else entry.description).ljust(25)
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# Using the locale and currency given, get the currency formatter and justify
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change = locales[locale]['currency_formatter'](entry.change, locales_currency[currency]).rjust(13)
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# Write entry change to table
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table.append(' | '.join([date, description, change]))
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# Write entry description to table
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# Truncate if necessary
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table += (entry.description[:22] + '...' if len(entry.description) > 25 else entry.description).ljust(25)
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table += ' | '
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# Write entry change to table
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if currency == 'USD':
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change_str = ''
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if entry.change < 0:
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change_str = '('
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change_str += '$'
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change_dollar = abs(int(entry.change / 100.0))
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dollar_parts = []
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while change_dollar > 0:
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dollar_parts.insert(0, str(change_dollar % 1000))
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change_dollar = change_dollar // 1000
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if len(dollar_parts) == 0:
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change_str += '0'
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else:
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while True:
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change_str += dollar_parts[0]
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dollar_parts.pop(0)
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if len(dollar_parts) == 0:
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break
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change_str += ','
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change_str += '.'
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change_cents = abs(entry.change) % 100
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change_cents = str(change_cents)
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if len(change_cents) < 2:
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change_cents = '0' + change_cents
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change_str += change_cents
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if entry.change < 0:
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change_str += ')'
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else:
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change_str += ' '
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while len(change_str) < 13:
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change_str = ' ' + change_str
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table += change_str
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elif currency == 'EUR':
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change_str = ''
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if entry.change < 0:
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change_str = '('
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change_str += u'€'
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change_euro = abs(int(entry.change / 100.0))
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euro_parts = []
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while change_euro > 0:
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euro_parts.insert(0, str(change_euro % 1000))
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change_euro = change_euro // 1000
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if len(euro_parts) == 0:
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change_str += '0'
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else:
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while True:
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change_str += euro_parts[0]
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euro_parts.pop(0)
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if len(euro_parts) == 0:
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break
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change_str += ','
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change_str += '.'
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change_cents = abs(entry.change) % 100
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change_cents = str(change_cents)
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if len(change_cents) < 2:
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change_cents = '0' + change_cents
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change_str += change_cents
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if entry.change < 0:
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change_str += ')'
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else:
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change_str += ' '
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while len(change_str) < 13:
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change_str = ' ' + change_str
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table += change_str
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return table
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elif locale == 'nl_NL':
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# Generate Header Row
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table = 'Datum'
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for _ in range(6):
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table += ' '
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table += '| Omschrijving'
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for _ in range(14):
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table += ' '
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table += '| Verandering'
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for _ in range(2):
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table += ' '
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while len(entries) > 0:
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table += '\n'
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# Find next entry in order
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min_entry_index = -1
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for i in range(len(entries)):
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entry = entries[i]
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if min_entry_index < 0:
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min_entry_index = i
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continue
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min_entry = entries[min_entry_index]
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if entry.date < min_entry.date:
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min_entry_index = i
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continue
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if (
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entry.date == min_entry.date and
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entry.change < min_entry.change
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):
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min_entry_index = i
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continue
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if (
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entry.date == min_entry.date and
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entry.change == min_entry.change and
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entry.description < min_entry.description
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):
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min_entry_index = i
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continue
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entry = entries[min_entry_index]
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entries.pop(min_entry_index)
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# Write entry date to table
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day = entry.date.day
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day = str(day)
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if len(day) < 2:
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day = '0' + day
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date_str = day
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date_str += '-'
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month = entry.date.month
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month = str(month)
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if len(month) < 2:
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month = '0' + month
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date_str += month
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date_str += '-'
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year = entry.date.year
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year = str(year)
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while len(year) < 4:
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year = '0' + year
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date_str += year
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table += date_str
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table += ' | '
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# Write entry description to table
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# Truncate if necessary
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if len(entry.description) > 25:
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for i in range(22):
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table += entry.description[i]
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table += '...'
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else:
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for i in range(25):
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if len(entry.description) > i:
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table += entry.description[i]
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else:
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table += ' '
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table += ' | '
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# Write entry change to table
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if currency == 'USD':
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change_str = '$ '
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if entry.change < 0:
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change_str += '-'
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change_dollar = abs(int(entry.change / 100.0))
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dollar_parts = []
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while change_dollar > 0:
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dollar_parts.insert(0, str(change_dollar % 1000))
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change_dollar = change_dollar // 1000
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if len(dollar_parts) == 0:
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change_str += '0'
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else:
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while True:
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change_str += dollar_parts[0]
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dollar_parts.pop(0)
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if len(dollar_parts) == 0:
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break
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change_str += '.'
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change_str += ','
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change_cents = abs(entry.change) % 100
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change_cents = str(change_cents)
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if len(change_cents) < 2:
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change_cents = '0' + change_cents
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change_str += change_cents
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change_str += ' '
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while len(change_str) < 13:
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change_str = ' ' + change_str
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table += change_str
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elif currency == 'EUR':
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change_str = u'€ '
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if entry.change < 0:
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change_str += '-'
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change_euro = abs(int(entry.change / 100.0))
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euro_parts = []
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while change_euro > 0:
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euro_parts.insert(0, str(change_euro % 1000))
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change_euro = change_euro // 1000
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if len(euro_parts) == 0:
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change_str += '0'
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else:
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while True:
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change_str += euro_parts[0]
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euro_parts.pop(0)
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if len(euro_parts) == 0:
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break
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change_str += '.'
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change_str += ','
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change_cents = abs(entry.change) % 100
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change_cents = str(change_cents)
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if len(change_cents) < 2:
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change_cents = '0' + change_cents
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change_str += change_cents
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change_str += ' '
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while len(change_str) < 13:
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change_str = ' ' + change_str
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table += change_str
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return table
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entries = [
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create_entry('2015-01-02', 'Something', 0),
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create_entry('2015-01-02', 'Something', -1),
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create_entry('2015-01-02', 'Something', 1),
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create_entry('2015-01-01', 'Something', 0),
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create_entry('2015-01-01', 'Something', -1),
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create_entry('2015-01-01', 'Something', 1)
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]
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print(format_entries('USD', 'en_US', entries))
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return '\n'.join(table)
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