Add can_prescribe?

This adds a method to `User` and `CIS2Info` which can be used to
determine with a particular user has permission to prescribe a
vaccination using either a PSD or the national protocol.

Jira-Issue: MAV-1400

Author: thomasleese

app/controllers/concerns/authentication_concern.rb

@@ -50,7 +50,8 @@ def selected_cis2_workgroup_is_valid?
 
     def selected_cis2_role_is_valid?
       cis2_info.can_view? || cis2_info.can_supply_using_pgd? ||
-        cis2_info.can_perform_local_admin_tasks? ||
+        cis2_info.can_prescribe?
+      cis2_info.can_perform_local_admin_tasks? ||
         cis2_info.can_access_sensitive_records?
     end
 

app/models/cis2_info.rb

@@ -8,6 +8,8 @@ class CIS2Info
 
   SUPERUSER_WORKGROUP = "mavissuperusers"
 
+  INDEPENDENT_PRESCRIBING_ACTIVITY_CODE = "B0420"
+
   attribute :organisation_name
   attribute :organisation_code
   attribute :role_name
@@ -44,6 +46,11 @@ def can_supply_using_pgd?
     role_code == NURSE_ROLE
   end
 
+  def can_prescribe?
+    role_code == NURSE_ROLE ||
+      activity_codes.include?(INDEPENDENT_PRESCRIBING_ACTIVITY_CODE)
+  end
+
   def can_perform_local_admin_tasks?
     in_superuser_workgroup?
   end

app/models/user.rb

@@ -139,6 +139,14 @@ def can_supply_using_pgd?
     cis2_enabled? ? cis2_info.can_supply_using_pgd? : fallback_role_nurse?
   end
 
+  def can_prescribe?
+    if cis2_enabled?
+      cis2_info.can_prescribe?
+    else
+      fallback_role_nurse? || fallback_role_prescriber?
+    end
+  end
+
   def can_perform_local_admin_tasks?
     if cis2_enabled?
       cis2_info.can_perform_local_admin_tasks?

spec/factories/users.rb

@@ -93,11 +93,19 @@
       fallback_role { :healthcare_assistant }
     end
 
+    trait :prescriber do
+      sequence(:email) { |n| "prescriber-#{n}@example.com" }
+      role_code { nil }
+      activity_codes { [CIS2Info::INDEPENDENT_PRESCRIBING_ACTIVITY_CODE] }
+      fallback_role { :prescriber }
+    end
+
     trait :signed_in do
       current_sign_in_at { Time.current }
       current_sign_in_ip { "127.0.0.1" }
     end
   end
 
   factory :admin, parent: :user, traits: %i[admin]
+  factory :prescriber, parent: :user, traits: %i[prescriber]
 end

spec/models/user_spec.rb

@@ -119,7 +119,7 @@
     end
   end
 
-  describe "#can_supply_using_pgd??" do
+  describe "#can_supply_using_pgd?" do
     subject { user.can_supply_using_pgd? }
 
     context "cis2 is enabled", cis2: :enabled do
@@ -151,6 +151,50 @@
     end
   end
 
+  describe "#can_prescribe?" do
+    subject { user.can_prescribe? }
+
+    context "cis2 is enabled", cis2: :enabled do
+      context "when the user is a nurse" do
+        let(:user) { build(:nurse) }
+
+        it { should be(true) }
+      end
+
+      context "when the user is admin staff" do
+        let(:user) { build(:admin) }
+
+        it { should be(false) }
+      end
+
+      context "when the user is a prescriber" do
+        let(:user) { build(:prescriber) }
+
+        it { should be(true) }
+      end
+    end
+
+    context "cis2 is disabled", cis2: :disabled do
+      context "when the user is a nurse" do
+        let(:user) { build(:nurse) }
+
+        it { should be(true) }
+      end
+
+      context "when the user is admin staff" do
+        let(:user) { build(:admin) }
+
+        it { should be(false) }
+      end
+
+      context "when the user is a prescriber" do
+        let(:user) { build(:prescriber) }
+
+        it { should be(true) }
+      end
+    end
+  end
+
   describe "#can_perform_local_admin_tasks?" do
     subject { user.can_perform_local_admin_tasks? }