Add Policy#task_available?

Some policies will have conditions around when a task is available. This
commit adds a new method to the base policy `task_available?` which can
be overwritten by sub policies. We also update the tasks views to show a
policy specific message when the task is not available.

app/models/base_policy.rb

@@ -70,4 +70,8 @@ def decision_deadline_date(claim)
   def award_amount_column
     "award_amount"
   end
+
+  def task_available?(task)
+    true
+  end
 end

app/views/admin/tasks/employment.html.erb

@@ -19,12 +19,15 @@
   <div class="govuk-grid-column-two-thirds">
     <% if @task.persisted? %>
       <%= render "task_outcome", task: @task, notes: @notes %>
+    <% elsif @claim.policy.task_available?(@task) %>
+      <%= render "form", task_name: "employment", claim: @claim %>
     <% else %>
-      <% if @task.employment_task_available? %>
-        <%= render "form", task_name: "employment", claim: @claim %>
-      <% else %>
-        <%= govuk_inset_text(text: "This task will be available from #{l(@claim.eligibility.employment_task_available_at)}") %>
-      <% end %>
+      <%= govuk_inset_text(
+        text: I18n.t(
+          "#{@claim.policy.to_s.underscore}.admin.task_questions.#{@task.name}.unavailable",
+          employment_task_available_at: l(@claim.eligibility.employment_task_available_at)
+        )
+      ) %>
     <% end %>
 
     <%= render partial: "admin/task_pagination", locals: { task_pagination: @task_pagination } %>

app/views/admin/tasks/matching_details.html.erb

@@ -13,14 +13,22 @@
   <div class="govuk-grid-column-two-thirds">
     <h2 class="govuk-heading-l"><%= @current_task_name.humanize %></h2>
 
-    <%= render("admin/claims/claims_with_matching_details", {matching_claims: @matching_claims, claim: @claim, show_caption: false}) %>
+    <% if @claim.policy.task_available?(@task) %>
+      <%= render("admin/claims/claims_with_matching_details", {matching_claims: @matching_claims, claim: @claim, show_caption: false}) %>
+    <% end %>
   </div>
 
   <div class="govuk-grid-column-two-thirds">
     <% if @task.persisted? %>
       <%= render "task_outcome", task: @task %>
-    <% else %>
+    <% elsif @claim.policy.task_available?(@task) %>
       <%= render "form", task_name: "matching_details", claim: @claim %>
+    <% else %>
+      <%= govuk_inset_text(
+        text: I18n.t(
+          "#{@claim.policy.to_s.underscore}.admin.task_questions.#{@task.name}.unavailable",
+        )
+      ) %>
     <% end %>
 
     <%= render partial: "admin/task_pagination", locals: { task_pagination: @task_pagination } %>

app/views/admin/tasks/payroll_details.html.erb

@@ -46,7 +46,7 @@
     <% if !@task.passed.nil? %>
       <%= render "task_outcome", task: @task, notes: @notes do %>
       <% end %>
-    <% else %>
+    <% elsif @claim.policy.task_available?(@task) %>
       <%= form_with model: [:admin, @claim, @claim.tasks.where(name: "payroll_details").first_or_initialize] do |f| %>
         <div class="govuk-form-group">
           <fieldset class="govuk-fieldset govuk-!-margin-bottom-6">
@@ -75,6 +75,12 @@
           <%= f.submit "Save and continue", class: "govuk-button", data: {module: "govuk-button"} %>
         </div>
       <% end %>
+    <% else %>
+      <%= govuk_inset_text(
+        text: I18n.t(
+          "#{@claim.policy.to_s.underscore}.admin.task_questions.#{@task.name}.unavailable",
+        )
+      ) %>
     <% end %>
 
     <%= render partial: "admin/task_pagination", locals: { task_pagination: @task_pagination } %>

app/views/admin/tasks/payroll_gender.html.erb

@@ -14,7 +14,7 @@
 
     <% if @task.persisted? %>
       <%= render "task_outcome", task: @task %>
-    <% else %>
+    <% elsif @claim.policy.task_available?(@task) %>
       <div class="govuk-form-group">
         <%= form_with url: admin_claim_payroll_gender_tasks_path(@claim), scope: :claim do |f| %>
           <fieldset class="govuk-fieldset govuk-!-margin-bottom-6">
@@ -46,6 +46,12 @@
           <%= f.submit "Save and continue", class: "govuk-button", data: {module: "govuk-button"} %>
         <% end %>
       </div>
+    <% else %>
+      <%= govuk_inset_text(
+        text: I18n.t(
+          "#{@claim.policy.to_s.underscore}.admin.task_questions.#{@task.name}.unavailable",
+        )
+      ) %>
     <% end %>
 
     <%= render partial: "admin/task_pagination", locals: { task_pagination: @task_pagination } %>

app/views/admin/tasks/student_loan_plan.html.erb

@@ -17,7 +17,7 @@
   <div class="govuk-grid-column-two-thirds">
     <% if @task.persisted? %>
       <%= render "task_outcome", task: @task %>
-    <% else %>
+    <% elsif @claim.policy.task_available?(@task) %>
       <%= render "admin/tasks/notes", notes: @notes, display_description: false %>
       <div class="govuk-inset-text task-outcome">
         <p class="govuk-body">
@@ -27,6 +27,12 @@
           No matching entry has been found in the Student Loan Company data yet.
         </p>
       </div>
+    <% else %>
+      <%= govuk_inset_text(
+        text: I18n.t(
+          "#{@claim.policy.to_s.underscore}.admin.task_questions.#{@task.name}.unavailable",
+        )
+      ) %>
     <% end %>
 
     <%= render partial: "admin/task_pagination", locals: { task_pagination: @task_pagination } %>