# 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 DAMO_NOT_QUOTE, DAMO_SIGMA, DAMO_SPACE, GraphFst
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from fun_text_processing.text_normalization.es.graph_utils import shift_number_gender
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from pynini.lib import pynutil
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class OrdinalFst(GraphFst):
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"""
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Finite state transducer for verbalizing ordinals
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e.g. ordinal { integer: "tercer" } } -> "tercero"
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-> "tercera"
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-> "tercer"
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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="ordinal", kind="verbalize", deterministic=deterministic)
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graph = pynutil.delete("integer: \"") + pynini.closure(DAMO_NOT_QUOTE, 1) + pynutil.delete("\"")
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# masculne gender we leave as is
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graph_masc = graph + pynutil.delete(" morphosyntactic_features: \"gender_masc")
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# shift gender
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graph_fem_ending = graph @ pynini.cdrewrite(
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pynini.cross("o", "a"), "", DAMO_SPACE | pynini.accep("[EOS]"), DAMO_SIGMA
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)
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graph_fem = shift_number_gender(graph_fem_ending) + pynutil.delete(" morphosyntactic_features: \"gender_fem")
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# Apocope just changes tercero and primero. May occur if someone wrote 11.er (uncommon)
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graph_apocope = (
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pynini.cross("tercero", "tercer")
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| pynini.cross("primero", "primer")
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| pynini.cross("undécimo", "decimoprimer")
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) # In case someone wrote 11.er with deterministic
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graph_apocope = (graph @ pynini.cdrewrite(graph_apocope, "", "", DAMO_SIGMA)) + pynutil.delete(
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" morphosyntactic_features: \"apocope"
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)
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graph = graph_apocope | graph_masc | graph_fem
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if not deterministic:
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# Plural graph
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graph_plural = pynini.cdrewrite(
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pynutil.insert("s"), pynini.union("o", "a"), DAMO_SPACE | pynini.accep("[EOS]"), DAMO_SIGMA
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)
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graph |= (graph @ graph_plural) + pynutil.delete("/plural")
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self.graph = graph + pynutil.delete("\"")
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delete_tokens = self.delete_tokens(self.graph)
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self.fst = delete_tokens.optimize()
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