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