generate alert constants

Signed-off-by: Khash Sajadi <[email protected]>

README.md

@@ -233,6 +233,11 @@ account_payload = AccountPayload.new(1, user.first)
 Noticent.notify(:new_user, account_payload)
 ```
 
+While it is possible to define and use alert names as symbols, Noticent also creates a constant with the name of the alert under the `Noticent` namespace to help with the use of alert names.
+By using the constants you can make sure alert names are free of typos.
+
+For example, if you have an alert called `some_event` then after configuration there will be a constant called `Noticent::ALERT_SOME_EVENT` available to use with the value `:some_event`.  
+
 ### Using Each Noticent Component
 
 #### Payload

lib/noticent/config.rb

@@ -13,6 +13,9 @@ def self.configure(options = {}, &block)
     @config = Noticent::Config::Builder.new(options, &block).build
     @config.validate!
 
+    # construct dynamics
+    @config.create_dynamics
+
     @config
   end
 
@@ -142,6 +145,17 @@ def view_dir
       File.join(base_dir, 'views')
     end
 
+    def create_dynamics
+      return if alerts.nil?
+
+      alerts.keys.each do |alert|
+        const_name = "ALERT_#{alert.to_s.upcase}"
+        next if Noticent.const_defined?(const_name)
+
+        Noticent.const_set(const_name, alert)
+      end
+    end
+
     def validate!
       # check all scopes
       scopes&.values&.each(&:validate!)

spec/config_spec.rb

@@ -307,4 +307,23 @@ def post_channel_registration; end
     expect(Noticent.configuration.opt_in_provider.opted_in?(recipient_id: 1, scope: :post, entity_id: 2, alert_name: :foo, channel_name: :slack)).not_to be_truthy
   end
 
+  it 'create alert constants' do
+    Noticent.configure do
+      channel :email
+
+      scope :post do
+        alert(:foo) { notify :users }
+        alert(:some_event) { notify :users }
+      end
+
+      scope :comment do
+        alert(:new_signup) { notify :users }
+      end
+    end
+
+    expect { Noticent::ALERT_FOO }.not_to raise_error
+    expect { Noticent::ALERT_SOME_EVENT}.not_to raise_error
+    expect { Noticent::ALERT_NEW_SIGNUP }.not_to raise_error
+  end
+
 end