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# frozen_string_literal: true
require 'ipynb_diff/symbolized_markdown_helper'
module IpynbDiff
# Transforms Jupyter output data into markdown
class OutputTransformer
include SymbolizedMarkdownHelper
HIDDEN_IMAGE_OUTPUT = ' [Hidden Image Output]'
ORDERED_KEYS = {
'execute_result' => %w[image/png image/svg+xml image/jpeg text/markdown text/latex text/plain],
'display_data' => %w[image/png image/svg+xml image/jpeg text/markdown text/latex],
'stream' => %w[text]
}.freeze
def initialize(hide_images = false)
@hide_images = hide_images
end
def transform(output, symbol)
case (output_type = output['output_type'])
when 'error'
transform_error(output['traceback'], symbol / 'traceback')
when 'execute_result', 'display_data'
transform_non_error(ORDERED_KEYS[output_type], output['data'], symbol / 'data')
when 'stream'
transform_element('text', output['text'], symbol)
end
end
def transform_error(traceback, symbol)
traceback.map.with_index do |t, idx|
t.split("\n").map do |l|
___(symbol / idx, l.gsub(/\[[0-9][0-9;]*m/, '').sub("\u001B", ' ').delete("\u001B").rstrip)
end
end
end
def transform_non_error(accepted_keys, elements, symbol)
accepted_keys.filter { |key| elements.key?(key) }.map do |key|
transform_element(key, elements[key], symbol)
end
end
def transform_element(output_type, output_element, symbol_prefix)
new_symbol = symbol_prefix / output_type
case output_type
when 'image/png', 'image/jpeg'
transform_image("#{output_type};base64", output_element, new_symbol)
when 'image/svg+xml'
transform_image("#{output_type};utf8", output_element, new_symbol)
when 'text/markdown', 'text/latex', 'text/plain', 'text'
transform_text(output_element, new_symbol)
end
end
def transform_image(image_type, image_content, symbol)
return ___(nil, HIDDEN_IMAGE_OUTPUT) if @hide_images
lines = image_content.is_a?(Array) ? image_content : [image_content]
single_line = lines.map(&:strip).join.gsub(/\s+/, ' ')
___(symbol, " ")
end
def transform_text(text_content, symbol)
symbolize_array(symbol, text_content) { |l| " #{l.rstrip}" }
end
end
end
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