34 lines
888 B
Ruby
34 lines
888 B
Ruby
# frozen_string_literal: true
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module DiscourseAi
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module Tokenizer
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class OpenAiTokenizer < BasicTokenizer
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class << self
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def tokenizer
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@@tokenizer ||= Tiktoken.get_encoding("cl100k_base")
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end
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def tokenize(text)
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tokenizer.encode(text)
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end
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def truncate(text, max_length)
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# Fast track the common case where the text is already short enough.
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return text if text.size < max_length
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tokenizer.decode(tokenize(text).take(max_length))
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rescue Tiktoken::UnicodeError
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max_length = max_length - 1
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retry
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end
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def can_expand_tokens?(text, addition, max_length)
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return true if text.size + addition.size < max_length
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tokenizer.encode(text).length + tokenizer.encode(addition).length < max_length
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end
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end
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end
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end
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end
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