class Trailblazer::Context::Container::WithAliases

Extension to replace Context::Container writers with aliased writers. It'll mutate the well known `@mutable_options` with only original keys and `@replica` with both orignal and aliased keys

Public Class Methods

new(wrapped_options, mutable_options, aliases:, replica_class:, **) click to toggle source
# File lib/trailblazer/context/container/with_aliases.rb, line 8
def initialize(wrapped_options, mutable_options, aliases:, replica_class:, **)
  @wrapped_options  = wrapped_options
  @mutable_options  = mutable_options

  # { "contract.default" => :contract, "result.default" => :result }
  @aliases          = aliases

  @replica_class    = replica_class
  @replica          = initialize_replica_store
end

Public Instance Methods

[]=(key, value)
Alias for: aliased_writer
alias_mapping_for(key) click to toggle source

Returns key and it's mapped alias. `key` could be an alias too.

aliases => { “contract.default” => :contract, “result.default”=>:result } key, _alias = alias_mapping_for(:contract) key, _alias = alias_mapping_for(“contract.default”)

@public

# File lib/trailblazer/context/container/with_aliases.rb, line 60
def alias_mapping_for(key)
  # when key has an alias
  return [ key, @aliases[key] ] if @aliases.key?(key)

  # when key is an alias
  return [ @aliases.key(key), key ] if @aliases.value?(key)

  # when there is no alias
  return [ key, nil ]
end
aliased_delete(key) click to toggle source

@public

# File lib/trailblazer/context/container/with_aliases.rb, line 34
def aliased_delete(key)
  _key, _alias = alias_mapping_for(key)

  @mutable_options.delete(_key)
  @replica.delete(_key)
  @replica.delete(_alias) if _alias
end
Also aliased as: delete
aliased_merge(other_hash) click to toggle source

@public

# File lib/trailblazer/context/container/with_aliases.rb, line 44
def aliased_merge(other_hash)
  # other_hash could have aliases and we don't want to store them in @mutable_options.
  _other_hash = replace_aliases_with_original_keys(other_hash)

  options = { aliases: @aliases, replica_class: @replica_class }
  self.class.new(@wrapped_options, @mutable_options.merge(_other_hash), **options)
end
Also aliased as: merge
aliased_writer(key, value) click to toggle source

@public

# File lib/trailblazer/context/container/with_aliases.rb, line 24
def aliased_writer(key, value)
  _key, _alias = alias_mapping_for(key)

  @mutable_options[_key] = value
  @replica[_key]         = value
  @replica[_alias]       = value if _alias
end
Also aliased as: []=
delete(key)
Alias for: aliased_delete
inspect() click to toggle source
# File lib/trailblazer/context/container/with_aliases.rb, line 19
def inspect
  %{#<Trailblazer::Context::Container::WithAliases wrapped_options=#{@wrapped_options} mutable_options=#{@mutable_options} aliases=#{@aliases}>}
end
merge(other_hash)
Alias for: aliased_merge

Private Instance Methods

initialize_replica_store() click to toggle source

Maintain aliases in `@replica` to make ctx actions faster™

# File lib/trailblazer/context/container/with_aliases.rb, line 74
def initialize_replica_store
  replica = @replica_class.new([ @wrapped_options, @mutable_options ])

  @aliases.each do |original_key, _alias|
    replica[_alias] = replica[original_key] if replica.key?(original_key)
  end

  replica
end
replace_aliases_with_original_keys(hash) click to toggle source

Replace aliases from `hash` with their orignal keys. This is used while doing a `merge` which initializes new Container with original keys and their aliases.

# File lib/trailblazer/context/container/with_aliases.rb, line 87
def replace_aliases_with_original_keys(hash)
  # DISCUSS: Better way to check for alias presence in `hash`
  return hash unless (hash.keys & @aliases.values).any?

  _hash = hash.dup

  @aliases.each do |original_key, _alias|
    _hash[original_key] = _hash.delete(_alias) if _hash.key?(_alias)
  end

  return _hash
end