# 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.en.graph_utils import (
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DAMO_NOT_QUOTE,
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DAMO_SIGMA,
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DAMO_SPACE,
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GraphFst,
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delete_preserve_order,
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)
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from fun_text_processing.text_normalization.es.graph_utils import strip_cardinal_apocope
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from fun_text_processing.text_normalization.es.taggers.date import articles
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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 { day: "treinta y uno" month: "marzo" year: "dos mil" } -> "treinta y uno de marzo de dos mil"
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date { day: "uno" month: "mayo" year: "del mil novecientos noventa" } -> "primero de mayo del mil novecientos noventa"
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Args:
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deterministic: if True will provide a single transduction option,
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for False multiple transduction are generated (used for audio-based normalization)
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"""
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def __init__(self, deterministic: bool = True):
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super().__init__(name="date", kind="verbalize", deterministic=deterministic)
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day_cardinal = pynutil.delete("day: \"") + pynini.closure(DAMO_NOT_QUOTE, 1) + pynutil.delete("\"")
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day = strip_cardinal_apocope(day_cardinal)
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primero = pynini.cdrewrite(pynini.cross("uno", "primero"), "[BOS]", "[EOS]", DAMO_SIGMA)
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day = (
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(day @ primero) if deterministic else pynini.union(day, day @ primero)
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) # Primero for first day is traditional, but will vary depending on region
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month = pynutil.delete("month: \"") + pynini.closure(DAMO_NOT_QUOTE, 1) + pynutil.delete("\"")
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year = (
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pynutil.delete("year: \"")
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+ articles
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+ DAMO_SPACE
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+ pynini.closure(DAMO_NOT_QUOTE, 1)
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+ pynutil.delete("\"")
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)
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# Insert preposition if wasn't originally with the year. This would mean a space was present
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year = pynutil.add_weight(year, -0.001)
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year |= (
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pynutil.delete("year: \"")
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+ pynutil.insert("de ")
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+ pynini.closure(DAMO_NOT_QUOTE, 1)
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+ pynutil.delete("\"")
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)
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# day month year
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graph_dmy = day + pynini.cross(DAMO_SPACE, " de ") + month + pynini.closure(pynini.accep(" ") + year, 0, 1)
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graph_mdy = month + DAMO_SPACE + day + pynini.closure(DAMO_SPACE + year, 0, 1)
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if deterministic:
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graph_mdy += pynutil.delete(" preserve_order: true") # Only accepts this if was explicitly passed
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self.graph = graph_dmy | graph_mdy
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final_graph = self.graph + delete_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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