change service level configuration strategy

The changes to the configuration required some non minor changes to the platform and also added some flexibility we don't require yet - and thus some new possibilities for errors.

So instead we still use the allow_..._certs and ..._cert_prefix options.
They basically provide the framework in which service levels can operate.

The service level configuration will not include the cert prefix anymore.
It only states if the service level is rate limited or not.
This avoids conflicts between the two configuration options.

I also removed the anonymous service level entirely.
It was also turning a boolean decision (do we provide anonymous eip or not) into something way more complex. Instead I added the AnonymousServiceLevel class to handle the corner cases for people who are not logged in.

Furthermore i renamed the UnauthenticatedUser to AnonymousUser so it matches the Anonymous Service Level nicely. It's also shorter and more intuitive.

3 files changed, 51 insertions, 14 deletions

diff --git a/app/models/anonymous_service_level.rb b/app/models/anonymous_service_level.rb
new file mode 100644
index 0000000..c51ce9e
--- /dev/null
+++ b/app/models/anonymous_service_level.rb
@@ -0,0 +1,31 @@
+class AnonymousServiceLevel
+
+  delegate :to_json, to: :config_hash
+
+  def cert_prefix
+    if APP_CONFIG[:allow_limited_certs]
+      APP_CONFIG[:limited_cert_prefix]
+    else
+      APP_CONFIG[:unlimited_cert_prefix]
+    end
+  end
+
+  def description
+    if APP_CONFIG[:allow_anonymous_certs]
+      "anonymous access to the VPN"
+    else
+      "please login to access our services"
+    end
+  end
+
+  protected
+
+  def config_hash
+    { name: "anonymous",
+      description: description,
+      cost: 0,
+      eip_rate_limit: APP_CONFIG[:allow_limited_certs]
+    }
+  end
+
+end
diff --git a/app/models/unauthenticated_user.rb b/app/models/anonymous_user.rb
index 7845a6f..360a577 100644
--- a/app/models/unauthenticated_user.rb
+++ b/app/models/anonymous_user.rb
@@ -1,8 +1,8 @@
 # The nil object for the user class
-class UnauthenticatedUser < Object
+class AnonymousUser < Object
 
   def effective_service_level
-    ServiceLevel.new id: APP_CONFIG[:unauthenticated_service_level]
+    AnonymousServiceLevel.new
   end
 
   def is_admin?
diff --git a/app/models/service_level.rb b/app/models/service_level.rb
index d0bd9b3..06ad202 100644
--- a/app/models/service_level.rb
+++ b/app/models/service_level.rb
@@ -4,29 +4,35 @@ class ServiceLevel
     @id = attributes[:id] || APP_CONFIG[:default_service_level]
   end
 
-  def self.authenticated_select_options
-    APP_CONFIG[:service_levels].map { |id,config_hash| [config_hash[:description], id] if config_hash[:name] != 'anonymous'}.compact
+  def self.select_options
+    APP_CONFIG[:service_levels].map do |id,config_hash|
+      [config_hash[:description], id]
+    end
   end
 
   def id
     @id
   end
 
-  def config_hash
-    @config_hash || APP_CONFIG[:service_levels][@id].with_indifferent_access
-  end
-
   delegate :to_json, to: :config_hash
 
-  def provides?(service)
-    services.include? service.to_s
+  def cert_prefix
+    if limited_cert?
+      APP_CONFIG[:limited_cert_prefix]
+    else
+      APP_CONFIG[:unlimited_cert_prefix]
+    end
   end
 
-  def services
-    config_hash[:services] || []
+  protected
+
+  def limited_cert?
+    APP_CONFIG[:allow_limited_certs] &&
+      (!APP_CONFIG[:allow_unlimited_certs] || config_hash[:eip_rate_limit])
   end
 
-  def cert_prefix
-    config_hash[:cert_prefix]
+  def config_hash
+    @config_hash || APP_CONFIG[:service_levels][@id].with_indifferent_access
   end
+
 end