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# frozen_string_literal: true
module ActionText
module PlainTextConversion
extend self
def node_to_plain_text(node)
remove_trailing_newlines(plain_text_for_node(node))
end
private
def plain_text_for_node(node, index = 0)
if respond_to?(plain_text_method_for_node(node), true)
send(plain_text_method_for_node(node), node, index)
else
plain_text_for_node_children(node)
end
end
def plain_text_for_node_children(node)
node.children.each_with_index.map do |child, index|
plain_text_for_node(child, index)
end.compact.join("")
end
def plain_text_method_for_node(node)
:"plain_text_for_#{node.name}_node"
end
def plain_text_for_block(node, index = 0)
"#{remove_trailing_newlines(plain_text_for_node_children(node))}\n\n"
end
%i[ h1 p ul ol ].each do |element|
alias_method :"plain_text_for_#{element}_node", :plain_text_for_block
end
def plain_text_for_br_node(node, index)
"\n"
end
def plain_text_for_text_node(node, index)
remove_trailing_newlines(node.text)
end
def plain_text_for_div_node(node, index)
"#{remove_trailing_newlines(plain_text_for_node_children(node))}\n"
end
def plain_text_for_figcaption_node(node, index)
"[#{remove_trailing_newlines(plain_text_for_node_children(node))}]"
end
def plain_text_for_blockquote_node(node, index)
text = plain_text_for_block(node)
text.sub(/\A(\s*)(.+?)(\s*)\Z/m, '\1“\2”\3')
end
def plain_text_for_li_node(node, index)
bullet = bullet_for_li_node(node, index)
text = remove_trailing_newlines(plain_text_for_node_children(node))
"#{bullet} #{text}\n"
end
def remove_trailing_newlines(text)
text.chomp("")
end
def bullet_for_li_node(node, index)
if list_node_name_for_li_node(node) == "ol"
"#{index + 1}."
else
"•"
end
end
def list_node_name_for_li_node(node)
node.ancestors.lazy.map(&:name).grep(/^[uo]l$/).first
end
end
end
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