33 lines
1 KiB
Ruby
33 lines
1 KiB
Ruby
# frozen_string_literal: true
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module Banzai
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module Filter
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class TruncateSourceFilter < HTML::Pipeline::TextFilter
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CHARACTER_COUNT_LIMIT = 1.megabyte
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USER_MSG_LIMIT = 10_000
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def call
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# don't truncate if it's a :blob and no limit is set
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return text if context[:text_source] == :blob && !context.key?(:limit)
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limit = context[:limit] || CHARACTER_COUNT_LIMIT
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# no sense in allowing `truncate_bytes` to duplicate a large
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# string unless it's too big
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return text if text.bytesize <= limit
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# Use three dots instead of the ellipsis Unicode character because
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# some clients show the raw Unicode value in the merge commit.
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trunc = text.truncate_bytes(limit, omission: '...')
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# allows us to indicate to the user that what they see is a truncated copy
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if limit > USER_MSG_LIMIT
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trunc.prepend("_The text is longer than #{limit} characters and has been visually truncated._\n\n")
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end
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trunc
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end
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end
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end
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end
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