Module: I18nTemplate::Translation

Defined in:
lib/i18n_template/translation.rb

Constant Summary collapse

CLOSE_TAG_BEGIN_PATTERN = 
/
  (?=<\/)(.*?)$     # match any string that begins with <\/ characters as 1 
/x.freeze
WRAPPER_OR_VARIABLE_PATTERN = 
/(
  \{\}              # empty braces
  |                 # or
    \{([^\}]+)\}    # match any data except close brace in braces as 2
  |                 # or
    \[(\/?)(\d+)\]  # optional match back-slash character as 3 and digits as 4 in brackets
)/x.freeze
T9N_CLEANUP_PATTERN = 
/\s+(i18n_wrapper="\d+"|i18n="\w")/x.freeze

Class Method Summary collapse

Class Method Details

.translate(key, wrappers, vars) ⇒ Object

translate phrase and replace placeholders and variables



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# File 'lib/i18n_template/translation.rb', line 19

def translate(key, wrappers, vars)
  # map each wrapper to open and close tag
  # e.g '<a><b><c>bla</d></e>' -> [ '<a><b><c>bla', '</d></e>' ]
  wrappers = wrappers.collect do |w|
    w =~ CLOSE_TAG_BEGIN_PATTERN ? [w[0, w.size-$1.size], $1] : ['', '']
  end

  phrase = (I18nTemplate.translator.call(key) || key).dup

  # replaces {variable name} or [digits] or [\digits]
  # with wrappers and variables
  phrase.gsub!(WRAPPER_OR_VARIABLE_PATTERN) do |s|
    case s[0, 1]
    when '{' then s == '{}' ? vars[''] : vars[$2]
    when '[' then (wrappers[$4.to_i] || [])['/' == $3 ? 1 : 0]
    end
  end

  # replace nl with break line
  phrase.gsub!("[nl]", "<br />")

  # replace unescaped characters
  phrase.gsub!("[lsb]", "[")
  phrase.gsub!("[rsb]", "]")
  phrase.gsub!("[lcb]", "{")
  phrase.gsub!("[rcb]", "}")
  phrase.gsub!("[ns]",  "#")

  # remove i18n attributes. E.g:
  # i18n_wrapper='100'
  # i18n="i"
  phrase.gsub!(T9N_CLEANUP_PATTERN, '')

  if phrase.respond_to?(:html_safe)
    # return html_safe phrase
    phrase.html_safe
  else
    # return pure string
    phrase
  end
end