# 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.inverse_text_normalization.vi.graph_utils import DAMO_NOT_QUOTE, GraphFst, delete_space
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from pynini.lib import pynutil
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class DateFst(GraphFst):
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"""
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Finite state transducer for verbalizing date, e.g.
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date { month: "1" year: "2012"} -> tháng 1 năm 2012
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date { day: "5" month: "10" year: "2021" preserve_order: true } -> 5 tháng 10 năm 2021
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"""
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def __init__(self):
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super().__init__(name="date", kind="verbalize")
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day = (
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pynutil.delete("day:")
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+ delete_space
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+ pynutil.delete('"')
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+ pynini.closure(DAMO_NOT_QUOTE, 1)
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+ pynutil.delete('"')
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)
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month = (
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pynutil.delete("month:")
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+ delete_space
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+ pynutil.delete('"')
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+ pynini.closure(DAMO_NOT_QUOTE, 1)
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+ pynutil.delete('"')
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)
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year = (
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pynutil.delete("year:")
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+ delete_space
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+ pynutil.delete('"')
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+ pynini.closure(DAMO_NOT_QUOTE, 1)
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+ delete_space
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+ pynutil.delete('"')
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)
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# (day) month year
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# day month
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graph_dm = day + delete_space + pynutil.insert(" tháng ") + month
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graph_dmy = graph_dm + delete_space + pynutil.insert(" năm ") + year
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graph_m = pynutil.insert("tháng ") + month
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graph_my = pynutil.insert("tháng ") + month + delete_space + pynutil.insert(" năm ") + year
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graph_y = pynutil.insert("năm ") + year
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optional_preserve_order = pynini.closure(
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pynutil.delete("preserve_order:") + delete_space + pynutil.delete("true") + delete_space
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| pynutil.delete("field_order:")
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+ delete_space
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+ pynutil.delete('"')
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+ DAMO_NOT_QUOTE
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+ pynutil.delete('"')
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+ delete_space
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)
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final_graph = (graph_y | graph_m | graph_dm | graph_dmy | graph_my) + delete_space + optional_preserve_order
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delete_tokens = self.delete_tokens(final_graph)
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self.fst = delete_tokens.optimize()
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