Module: RuoteKit::Helpers::RenderHelpers

Defined in:
lib/ruote-kit/helpers/render_helpers.rb

Overview

Helpers for rendering stuff

Constant Summary collapse

HTTP_CODES =

Used by #http_error

{
  400 => 'bad request',
  404 => 'resource not found',
  412 => 'precondition failed'
}

Instance Method Summary collapse

Instance Method Details

#check_if_match_etag(value) ⇒ Object

http error 412 if if-match header is set to an etag different to the value given



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# File 'lib/ruote-kit/helpers/render_helpers.rb', line 65

def check_if_match_etag(value)
  value = '"%s"' % value

  if etags = request.env['HTTP_IF_MATCH']
    etags = etags.split(/\s*,\s*/)

    unless etags.include?(value) || etags.include?('*')
      http_error(412)
      halt
    end
  end
end

#h(s) ⇒ Object

Escaping HTML, rack style.



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# File 'lib/ruote-kit/helpers/render_helpers.rb', line 20

def h(s)

  Rack::Utils.escape_html(s)
end

#http_error(code, cause = nil) ⇒ Object

HTTP errors



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# File 'lib/ruote-kit/helpers/render_helpers.rb', line 35

def http_error(code, cause=nil)

  @code = code
  @message = HTTP_CODES[code]
  @cause = cause

  @trace = if cause
    [ cause.message ] + cause.backtrace
  else
    nil
  end

  @format = if m = @format.to_s.match(/^[^\/]+\/([^;]+)/)
    m[1].to_sym
  else
    @format
  end
    # freaking sinata-respond_to 0.4.0... (or is that it ?)

  status(@code)

  respond_to do |format|
    format.html { haml :http_error }
    format.json { json(:http_error, [ @code, @message, @cause ]) }
  end
end

#pluralize(number, word) ⇒ Object 



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# File 'lib/ruote-kit/helpers/render_helpers.rb', line 11

def pluralize(number, word)

  word << 's' if number > 1

  [ number, word ].join(' ')
end

#process_tree(object) ⇒ Object

Extract the process tree



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# File 'lib/ruote-kit/helpers/render_helpers.rb', line 80

def process_tree(object)

  case object
  when Ruote::Workitem
    process = RuoteKit.engine.process(object.fei.wfid)
    Rufus::Json.encode(process.current_tree)
  when Ruote::ProcessStatus
    Rufus::Json.encode(object.current_tree)
  end
end