Module: InjectedLogger::Delegator

Defined in:
lib/injectedlogger/delegator.rb

Class Method Summary collapse

Class Method Details

.delegate_levels(on:, from:, prefix:, extra_levels: [], old_levels: [], fallback: UNKNOWN, info: INFO) ⇒ Object

creates methods in klass according to the supported levels in the object specified. (levels are supposed to be methods)

Arguments:

on: class which we’ll create methods on from: underlying logger object, which responds to some levels prefix: prefix log messages with this string extra_levels: extra levels we want to use from klass delegating to logger old_levels: the old levels that the class was delegating previously fallback: not required, suggested fallback level for non-native lvls info: not required, suggested level usable for information

Returns a hash with information about supported and fallback levels:

native: levels natively supported by the underlying object nonnative: non-native levels, callable only if there is fallback fallback: (if existing) native level used as fallback for others supported: supported levels, some maybe via fallback to native ones info: level the caller can use to give info (can be nil)



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# File 'lib/injectedlogger/delegator.rb', line 25

def delegate_levels(on:, from:, prefix:, extra_levels: [],
                    old_levels: [], fallback: UNKNOWN, info: INFO)
  self.logger = from
  self.klass = on
  self.prefix = prefix
  supp, unsupp = add_level_methods(extra_levels)
  { native: supp,
    nonnative: unsupp,
    info: preferred_lvl(supp, info) }.
  tap do |level_info|
    level_info.merge!(
      if fallback and unsupp.any?
        flvl = preferred_lvl(supp, fallback)
        add_as_fallback(unsupp, flvl)
        { fallback: flvl, supported: supp + unsupp }
      else
        { supported: supp }
      end)
    (old_levels - level_info[:supported]).each { |lvl| remove_level lvl }
  end
end