variable scanner for hapi_mailer

variable_scanner.rb

str = "<container>\n<row>\n  <columns large=\"6\">\n    <h1>%{toto}%</h1>\n  </columns>\n  %{kilo}%\n  <columns large=\"6\">\n    <i class=\"classx\">%{socco}%</i>\n  </columns>\n  %{kilo}%\n</row>\n</container>"

# /%{+\w+}%/ is the regex of the chosen string interpolation synthax e.g. %{variable}%
# we try to extract all of those and put them in an array

# first lets get the all the interpolation out of the text
interpolition_arr = str.scan(/%{+\w+}%/)
# => ["%{toto}%", "%{kilo}%", "%{socco}%", "%{kilo}%"]

# make each variable have only one occurence in the variable array
variable_arr = []

interpolition_arr.map{|w| variable_arr.include?(w) == false ? variable_arr << w : nil }
# now viarable_arr returns ["%{toto}%", "%{kilo}%", "%{socco}%"]

# finally get the variable name without the interpolation synhtax
variable_arr.map{|i| i.gsub(/[%{} ]/, '' )}
# => ["toto", "kilo", "socco"]