Module: Legion::LLM::CallerIdentity

Defined in:
lib/legion/llm/caller_identity.rb

Constant Summary collapse

GENERIC_IDENTITIES = 
%w[anonymous process service system user].freeze
DEFAULT_IDENTITY = 
{ identity: 'unknown:anonymous', type: 'unknown' }.freeze

Class Method Summary collapse

Class Method Details

.first_present(*values) ⇒ Object 



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# File 'lib/legion/llm/caller_identity.rb', line 75

def first_present(*values)
  values.find { |value| present?(value) }
end

.hash_value(hash, key) ⇒ Object 



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# File 'lib/legion/llm/caller_identity.rb', line 79

def hash_value(hash, key)
  return nil unless hash.respond_to?(:key?)
  return hash[key] if hash.key?(key)

  string_key = key.to_s
  hash[string_key] if hash.key?(string_key)
end

.normalize(caller: nil, identity: nil) ⇒ Object 



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# File 'lib/legion/llm/caller_identity.rb', line 11

def normalize(caller: nil, identity: nil)
  return normalize_string(caller) if caller.is_a?(String)

  caller_hash = caller.is_a?(Hash) ? caller : {}
  requested_by = hash_value(caller_hash, :requested_by)
  requested_by = caller_hash unless requested_by.is_a?(Hash)

  top_identity = normalize_identity_option(identity)
  extension = hash_value(caller_hash, :extension)
  type = first_present(
    hash_value(requested_by, :type),
    hash_value(top_identity, :type),
    extension && 'extension'
  )

  raw_identity = first_present(
    hash_value(requested_by, :id),
    hash_value(requested_by, :canonical_name),
    hash_value(top_identity, :id),
    hash_value(top_identity, :canonical_name),
    hash_value(top_identity, :identity),
    hash_value(top_identity, :username),
    hash_value(requested_by, :identity),
    hash_value(requested_by, :username),
    extension && "extension:#{extension}"
  )

  result = {
    identity:   normalize_identity_value(raw_identity, type),
    type:       type,
    credential: first_present(hash_value(requested_by, :credential), hash_value(top_identity, :credential)),
    hostname:   hash_value(requested_by, :hostname)
  }.compact
  result.empty? ? DEFAULT_IDENTITY.dup : result
end

.normalize_identity_option(value) ⇒ Object 



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# File 'lib/legion/llm/caller_identity.rb', line 54

def normalize_identity_option(value)
  case value
  when Hash
    value
  when String
    { identity: value }
  else
    {}
  end
end

.normalize_identity_value(value, type) ⇒ Object 



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# File 'lib/legion/llm/caller_identity.rb', line 65

def normalize_identity_value(value, type)
  return nil unless present?(value)

  text = value.to_s
  return text if text.include?(':') || text.include?('@')
  return "#{type}:#{text}" if type && GENERIC_IDENTITIES.include?(text)

  text
end

.normalize_string(value) ⇒ Object 



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# File 'lib/legion/llm/caller_identity.rb', line 47

def normalize_string(value)
  return DEFAULT_IDENTITY.dup unless present?(value)

  type = value.to_s.include?(':') ? value.to_s.split(':', 2).first : nil
  { identity: value.to_s, type: type }.compact
end

.present?(value) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/legion/llm/caller_identity.rb', line 87

def present?(value)
  !value.nil? && !(value.respond_to?(:empty?) && value.empty?)
end