Class: Seekmodo::Sdk::BrowserToken

Inherits:
Object
  • Object
show all
Defined in:
lib/seekmodo/sdk/browser_token.rb

Constant Summary collapse

CACHE_KEY = 
"numinix.seekmodo.browser_token"
SAFETY_MARGIN_SECONDS = 
60

Instance Method Summary collapse

Constructor Details

#initialize(client, cache, clock: nil) ⇒ BrowserToken

Returns a new instance of BrowserToken.



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# File 'lib/seekmodo/sdk/browser_token.rb', line 13

def initialize(client, cache, clock: nil)
  @client = client
  @cache = cache
  @clock = clock || -> { Time.now.to_i }
end

Instance Method Details

#forget(audience = nil) ⇒ Object 



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# File 'lib/seekmodo/sdk/browser_token.rb', line 57

def forget(audience = nil)
  @cache.delete("#{CACHE_KEY}:#{audience || 'default'}")
end

#token(audience = nil, force: false) ⇒ Object 



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# File 'lib/seekmodo/sdk/browser_token.rb', line 19

def token(audience = nil, force: false)
  cache_key = "#{CACHE_KEY}:#{audience || 'default'}"
  unless force
    cached = @cache.get(cache_key)
    if cached.is_a?(Hash)
      expires_at = cached.fetch("expires_at", 0).to_i
      if expires_at > @clock.call + SAFETY_MARGIN_SECONDS
        return {
          "token" => cached["token"].to_s,
          "expires_at" => expires_at,
          "issued_at" => cached.fetch("issued_at", @clock.call).to_i
        }
      end
    end
  end

  response = @client.browser_token(audience)
  token = response["token"].to_s
  expires_at = response.fetch("expires_at", 0).to_i
  issued_at = response.fetch("issued_at", @clock.call).to_i

  if token.empty? || expires_at.zero?
    raise ClientError.new(
      "Gateway tenants.token response missing token/expires_at fields.",
      ClientError::KIND_BAD_RESPONSE
    )
  end

  value = {
    "token" => token,
    "expires_at" => expires_at,
    "issued_at" => issued_at
  }
  ttl = [expires_at - @clock.call - SAFETY_MARGIN_SECONDS, 1].max
  @cache.set(cache_key, value, ttl)
  value
end