# Copyright NeMo (https://github.com/NVIDIA/NeMo). All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import pynini
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from fun_text_processing.text_normalization.zh.graph_utils import FUN_CHAR, FUN_DIGIT, GraphFst, insert_space
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from fun_text_processing.text_normalization.zh.utils import get_abs_path
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from pynini.lib import pynutil
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class Date(GraphFst):
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'''
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2002年 -> tokens { date { year: "2002" } }
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2002-01-28 -> tokens { date { year: "2002" month: "01" day: "28"} }
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2002/01/28 -> tokens { date { year: "2002" month: "01" day: "28"} }
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2002.01.28 -> tokens { date { year: "2002" month: "01" day: "28"} }
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2002/02 -> tokens { date { year: "2002" month "02"} }
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02/11 -> tokens { date { year: "02" month "11"} } different with case "fraction 2/11"
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'''
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def __init__(self, deterministic: bool = True, lm: bool = False):
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super().__init__(name="date", kind="classify", deterministic=deterministic)
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graph_digit = pynini.string_file(get_abs_path("data/number/digit.tsv"))
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graph_zero = pynini.string_file(get_abs_path("data/number/zero.tsv"))
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year_whitelist = pynini.string_file(get_abs_path("data/date/year_suffix.tsv"))
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delete_date_sign = pynutil.delete("/") | pynutil.delete('-') | pynutil.delete('.')
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# 2012年
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date_type0 = (
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pynutil.insert("year: \"")
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+ pynini.closure(graph_digit | graph_zero, 2, 4)
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+ "年"
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+ pynini.difference(FUN_CHAR, year_whitelist)
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+ pynutil.insert("\"")
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)
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year_2_4_digit = pynini.closure(FUN_DIGIT, 2, 4) + delete_date_sign
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year_4_digit = pynini.closure(FUN_DIGIT, 4, 4) + delete_date_sign
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year_2_digit_with_zero = "0" + FUN_DIGIT + delete_date_sign
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month_no_day_with_zero = "0" + FUN_DIGIT
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month_no_day = pynini.closure(FUN_DIGIT, 2, 2)
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month = pynini.closure(FUN_DIGIT, 1, 2) + delete_date_sign
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day = pynini.closure(FUN_DIGIT, 1, 2)
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# 2012/01/28
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date_type1 = (
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pynutil.insert("year: \"")
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+ year_2_4_digit
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+ pynutil.insert("\"")
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+ insert_space
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+ pynutil.insert("month: \"")
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+ month
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+ pynutil.insert("\"")
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+ insert_space
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+ pynutil.insert("day: \"")
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+ day
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+ pynutil.insert("\"")
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)
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# 12/01
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date_type2 = (
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pynutil.insert("year: \"")
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+ year_2_4_digit
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+ pynutil.insert("\"")
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+ insert_space
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+ pynutil.insert("month: \"")
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+ month_no_day_with_zero
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+ pynutil.insert("\"")
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)
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# 2012/11
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date_type3 = (
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pynutil.insert("year: \"")
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+ year_4_digit
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+ pynutil.insert("\"")
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+ insert_space
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+ pynutil.insert("month: \"")
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+ month_no_day
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+ pynutil.insert("\"")
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)
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# 02/05
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date_type4 = (
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pynutil.insert("year: \"")
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+ year_2_digit_with_zero
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+ pynutil.insert("\"")
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+ insert_space
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+ pynutil.insert("month: \"")
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+ month_no_day
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+ pynutil.insert("\"")
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)
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# add your date type as date_typex here.
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graph = date_type0 | date_type1 | date_type2 | date_type3 | date_type4
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self.fst = self.add_tokens(graph).optimize()
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