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# frozen_string_literal: true
module Mail::Parsers
class ContentDispositionParser
include Mail::Utilities
def parse(s)
content_disposition = ContentDispositionStruct.new("", nil)
if Mail::Utilities.blank?(s)
return content_disposition
end
actions, error = Ragel.parse(:content_disposition, s)
if error
raise Mail::Field::ParseError.new(Mail::ContentDispositionElement, s, error)
end
content_disposition.parameters = []
disp_type_s = param_attr_s = param_attr = qstr_s = qstr = param_val_s = nil
actions.each_slice(2) do |action_id, p|
action = Mail::Parsers::Ragel::ACTIONS[action_id]
case action
# Disposition Type
when :disp_type_s then disp_type_s = p
when :disp_type_e
content_disposition.disposition_type = s[disp_type_s..(p-1)].downcase
# Parameter Attribute
when :param_attr_s then param_attr_s = p
when :param_attr_e then param_attr = s[param_attr_s..(p-1)]
# Quoted String.
when :qstr_s then qstr_s = p
when :qstr_e then qstr = s[qstr_s..(p-1)]
# Parameter Value
when :param_val_s then param_val_s = p
when :param_val_e
if param_attr.nil?
raise Mail::Field::ParseError.new(Mail::ContentDispositionElement, s, "no attribute for value")
end
# Use quoted string value if one exists, otherwise use parameter value
if qstr
value = qstr
else
value = s[param_val_s..(p-1)]
end
content_disposition.parameters << { param_attr => value }
param_attr = nil
qstr = nil
else
raise Mail::Field::ParseError.new(Mail::ContentDispositionElement, s, "Failed to process unknown action: #{action}")
end
end
content_disposition
end
private
def cleaned(string)
string =~ /(.+);\s*$/ ? $1 : string
end
end
end
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