43 lines
1.4 KiB
Python
43 lines
1.4 KiB
Python
import copy
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from copy import deepcopy
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import json
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import os
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import jsgf
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class NLU:
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def __init__(self):
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self.grammars = [
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jsgf.parse_grammar_file(f"grammars/{file_name}")
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for file_name in os.listdir("grammars")
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]
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def get_dialog_act(self, rule):
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slots = []
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self.get_slots(rule.expansion, slots)
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return {"act": rule.grammar.name, "slots": slots}
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def get_slots(self, expansion, slots):
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if expansion.tag != "":
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slots.append((expansion.tag, expansion.current_match))
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return
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for child in expansion.children:
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self.get_slots(child, slots)
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if not expansion.children and isinstance(expansion, jsgf.NamedRuleRef):
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self.get_slots(expansion.referenced_rule.expansion, slots)
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def match(self, utterance):
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list_of_illegal_character = [",", ".", "'", "?", "!", ":", "-", "/"]
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for illegal_character in list_of_illegal_character[:-2]:
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utterance = utterance.replace(f"{illegal_character}", "")
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for illegal_character in list_of_illegal_character[-2:]:
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utterance = utterance.replace(f"{illegal_character}", " ")
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for grammar in self.grammars:
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matched = grammar.find_matching_rules(utterance.lower())
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if matched:
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return self.get_dialog_act(matched[0])
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return {"act": "null", "slots": []}
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