module Aruba::Api::Environment

def append_environment_variable(name, value)
  name = name.to_s
  value = value.to_s
  old_environment = aruba.environment.to_h
  aruba.environment.append name, value
  new_environment = aruba.environment.to_h
  environment_change = { old: old_environment,
                         new: new_environment,
                         changed: { name: name, value: value } }
  aruba.event_bus.notify Events::ChangedEnvironmentVariable.new(environment_change)
  self
end

def delete_environment_variable(name)
  name = name.to_s
  old_environment = aruba.environment.to_h
  aruba.environment.delete name
  new_environment = aruba.environment.to_h
  environment_change = { old: old_environment,
                         new: new_environment,
                         changed: { name: name, value: "" } }
  aruba.event_bus.notify Events::ChangedEnvironmentVariable.new(environment_change)
  self
end

def prepend_environment_variable(name, value)
  name = name.to_s
  value = value.to_s
  old_environment = aruba.environment.to_h
  aruba.environment.prepend name, value
  new_environment = aruba.environment.to_h
  environment_change = { old: old_environment,
                         new: new_environment,
                         changed: { name: name, value: value } }
  aruba.event_bus.notify Events::ChangedEnvironmentVariable.new(environment_change)
  self
end

def set_environment_variable(name, value)
  name = name.to_s
  value = value.to_s
  old_environment = aruba.environment.to_h
  aruba.environment[name] = value
  new_environment = aruba.environment.to_h
  environment_change = { old: old_environment,
                         new: new_environment,
                         changed: { name: name, value: value } }
  aruba.event_bus.notify Events::AddedEnvironmentVariable.new(environment_change)
  self
end