Class: Togls::RuleRepository

Inherits:
Object
  • Object
show all
Defined in:
lib/togls/rule_repository.rb

Overview

Rule Repository

The Rule Repository is the intended interface to store and retrieve rules. It does these by interfacing with Rule Repository Drivers which are passed in during construction as an Array.

Instance Method Summary collapse

Constructor Details

#initialize(drivers) ⇒ RuleRepository

Returns a new instance of RuleRepository.



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# File 'lib/togls/rule_repository.rb', line 8

def initialize(drivers)
  unless drivers.is_a?(Array)
    raise Togls::InvalidDriver, 'RuleRepository requires a valid driver'
  end
  if drivers.empty?
    raise Togls::MissingDriver, 'RuleRepository requires a driver'
  end
  @drivers = drivers
end

Instance Method Details

#extract_storage_payload(rule) ⇒ Object 



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# File 'lib/togls/rule_repository.rb', line 25

def extract_storage_payload(rule)
  {
    'id' => rule.id.to_s,
    'type_id' => ::Togls.send(:rule_type_registry).get_type_id(rule.class.to_s),
    'data' => rule.data,
    'target_type' => rule.target_type.to_s
  }
end

#fetch_rule_data(id) ⇒ Object 



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# File 'lib/togls/rule_repository.rb', line 34

def fetch_rule_data(id)
  rule_data = nil
  @drivers.reverse.each do |driver|
    rule_data = driver.get(id)
    break if rule_data
  end
  rule_data
end

#get(rule_id) ⇒ Object 



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# File 'lib/togls/rule_repository.rb', line 43

def get(rule_id)
  rule_data = fetch_rule_data(rule_id)
  validate_rule_data(rule_data)
  reconstitute_rule(rule_data)
end

#reconstitute_rule(rule_data) ⇒ Object 



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# File 'lib/togls/rule_repository.rb', line 70

def reconstitute_rule(rule_data)
  if rule_data.has_key?('target_type')
    ::Togls.rule_type(rule_data['type_id'])\
      .new(rule_data['id'].to_sym, rule_data['type_id'].to_sym, rule_data['data'],
           target_type: rule_data['target_type'].to_sym)
  else
    ::Togls.rule_type(rule_data['type_id']).new(rule_data['id'].to_sym,
                                                rule_data['type_id'].to_sym,
                                                rule_data['data'])
  end
end

#store(rule) ⇒ Object 



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# File 'lib/togls/rule_repository.rb', line 18

def store(rule)
  rule_data = extract_storage_payload(rule)
  @drivers.each do |driver|
    driver.store(rule.id.to_s, rule_data)
  end
end

#validate_rule_data(rule_data) ⇒ Object 



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# File 'lib/togls/rule_repository.rb', line 49

def validate_rule_data(rule_data)
  if rule_data.nil?
    Togls.logger.warn "None of the rule repository drivers claim to have the rule"
    raise Togls::RepositoryRuleDataInvalid, "None of the rule repository drivers claim to have the rule"
  end

  ['id', 'type_id', 'data', 'target_type'].each do |k|
    if !rule_data.has_key? k
      Togls.logger.warn "One of the rule repository drivers returned rule data that is missing the '#{k}'"
      raise Togls::RepositoryRuleDataInvalid, "One of the rule repository drivers returned rule data that is missing the '#{k}'"
    end
  end

  ['id', 'type_id', 'target_type'].each do |k|
    if !rule_data[k].is_a?(String)
      Togls.logger.warn "One of the rule repository drivers returned rule data with '#{k}' not being a string"
      raise Togls::RepositoryRuleDataInvalid, "One of the rule repository drivers returned rule data with '#{k}' not being a string"
    end
  end
end