Module: RuoteKit::Helpers::JsonHelpers

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

Overview

Helpers for JSON rendering

Instance Method Summary collapse

Instance Method Details

#json(resource, *args) ⇒ Object 



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

def json(resource, *args)

  object = respond_to?("json_#{resource}") ?
    send("json_#{resource}", *args) : nil

  Rufus::Json.encode(
    'links' => links(resource), resource.to_s => object || args.first
  )
end

#json_error(error = @error) ⇒ Object 



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# File 'lib/ruote-kit/helpers/json_helpers.rb', line 90

def json_error(error=@error)

  fei = error.fei
  wfid = fei.wfid

  error.to_h.merge('links' => [
    hlink('errors', fei.sid, :rel => 'self'),
    hlink('errors', wfid, :rel => '#process_errors'),
    hlink('processes', wfid, :rel => '#process')
  ])
end

#json_errors ⇒ Object 



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# File 'lib/ruote-kit/helpers/json_helpers.rb', line 85

def json_errors

  @errors.collect { |e| json_error(e) }
end

#json_expression(expression = @expression) ⇒ Object 



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# File 'lib/ruote-kit/helpers/json_helpers.rb', line 49

def json_expression(expression=@expression)

  detailed = (@expression != nil)

  links = [
    hlink('expressions', expression.fei.sid, :rel => 'self'),
    hlink('processes', expression.fei.wfid, :rel => '#process'),
    hlink('expressions', expression.fei.wfid, :rel => '#process_expressions')
  ]
  links << hlink(
    'expressions', expression.parent.fei.sid, 'parent'
  ) if expression.parent

  expression.as_h(detailed).merge('links' => links)
end

#json_expressions ⇒ Object 



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# File 'lib/ruote-kit/helpers/json_helpers.rb', line 44

def json_expressions

  @process.expressions.map { |e| json_expression(e) }
end

#json_http_error(err) ⇒ Object 



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# File 'lib/ruote-kit/helpers/json_helpers.rb', line 132

def json_http_error(err)

  { 'code' => err[0], 'message' => err[1], 'cause' => err[2].to_s }
end

#json_participants ⇒ Object 



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# File 'lib/ruote-kit/helpers/json_helpers.rb', line 102

def json_participants

  @participants.collect { |pa|
    pa.as_h.merge('links' => [ hlink('participants', :rel => 'self') ])
  }
end

#json_process(process = @process) ⇒ Object 



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# File 'lib/ruote-kit/helpers/json_helpers.rb', line 30

def json_process(process=@process)

  detailed = (@process != nil)

  process.as_h(detailed).merge('links' => [
    hlink('processes', process.wfid, :rel => 'self'),
    hlink('processes', process.wfid, :rel => '#process'),
    hlink('expressions', process.wfid, :rel => '#process_expressions'),
    hlink('workitems', process.wfid, :rel => '#process_workitems'),
    hlink('errors', process.wfid, :rel => '#process_errors'),
    hlink('schedules', process.wfid, :rel => '#process_schedules')
  ])
end

#json_processes ⇒ Object

def json_exception(code, exception)

{ 'code' => code, 'exception' => { 'message' => exception.message } }

end



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# File 'lib/ruote-kit/helpers/json_helpers.rb', line 25

def json_processes

  @processes.map { |p| json_process(p) }
end

#json_schedules ⇒ Object 



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# File 'lib/ruote-kit/helpers/json_helpers.rb', line 109

def json_schedules

  @schedules.each do |sched|

    owner_fei = sched.delete('owner')
    target_fei = sched.delete('target')

    sched['owner'] = owner_fei.to_h
    sched['target'] = target_fei ? target_fei.to_h : nil

    sched['links'] = []

    sched['links'] << hlink(
      'expressions', owner_fei.sid, :rel => '#schedule_owner'
    )
    sched['links'] << hlink(
      'expressions', target_fei.sid, :rel => '#schedule_target'
    ) if target_fei
  end

  @schedules
end

#json_workitem(workitem = @workitem) ⇒ Object 



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# File 'lib/ruote-kit/helpers/json_helpers.rb', line 70

def json_workitem(workitem=@workitem)

  detailed = (@workitem != nil)

  links = [
    hlink('workitems', workitem.fei.sid, :rel => 'self'),
    hlink('processes', workitem.fei.wfid, :rel => '#process'),
    hlink('expressions', workitem.fei.sid, :rel => '#expression'),
    hlink('expressions', workitem.fei.wfid, :rel => '#process_expressions'),
    hlink('errors', workitem.fei.wfid, :rel => '#process_errors')
  ]

  workitem.as_h(detailed).merge('links' => links)
end

#json_workitems ⇒ Object 



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

def json_workitems

  @workitems.map { |w| json_workitem(w) }
end

#links(resource) ⇒ Object 



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# File 'lib/ruote-kit/helpers/json_helpers.rb', line 137

def links(resource)

  result = [
    hlink(:rel => '#root'),
    hlink('processes', :rel => '#processes'),
    hlink('workitems', :rel => '#workitems'),
    hlink('errors', :rel => '#errors'),
    hlink('participants', :rel => '#participants'),
    hlink('schedules', :rel => '#schedules'),
    hlink('history', :rel => '#history'),
    hlink(request.fullpath, :rel => 'self')
  ]

  if @skip # pagination is active

    result << hlink(resource.to_s, :rel => 'all')

    lim = @limit || settings.limit
    las = (@count / lim) * lim rescue 0
    pre = [ 0, @skip - lim ].max
    nex = [ @skip + lim, las ].min

    result << hlink(
      resource.to_s,
      :skip => 0, :limit => lim, :rel => 'first')
    result << hlink(
      resource.to_s,
      :skip => las, :limit => lim, :rel => 'last')
    result << hlink(
      resource.to_s,
      :skip => pre, :limit => lim, :rel => 'previous')
    result << hlink(
      resource.to_s,
      :skip => nex, :limit => lim, :rel => 'next')
  end

  result
end