Convert `export class hoge_moge` to `export class HogeMoge`

camerize.rb

# How to use:
# find ./src -type f -name "*ts"  | ruby camelize.rb
def capitalize(str)
  str.split("_").map(&:capitalize).join
end

while (file = gets) do
  output = ""
  file.chomp!
  p "start: #{file}"
  File.open(file, mode = "rt") do |f|
    f.each_line do |line|
      if line.include? "export class"
        line.gsub(/export class (\w+)/, "\1")
        output += "export class #{capitalize($1)} {\n"
        next
      end

      line.gsub(/import { (\w+) } from/, "\1")
      unless $1.nil?
        cls = capitalize($1)
        output += "import { #{cls} } from \"./#{cls}\";\n"
        next
      end

      line.gsub(/(.+): (\w+)(.+)/, "\1\2\3")
      if $2 != nil && !$2.include?("number") && !$2.include?("true") && !$2.include?("false") && !$2.include?("string") && !$2.include?("bool")
        cls = capitalize($2)
        output += "#{$1}: #{cls}#{$3}\n"
        next
      end

      output += line
    end
  end

  File.open(file, mode = "w") do |f|
    f.puts output
  end
end