allow taking amount from queue

app/controllers/letter/queues_controller.rb

@@ -65,8 +65,10 @@ class Letter::QueuesController < ApplicationController
     unless @letter_queue.letters.any?
       flash[:error] = "no letters?"
       redirect_to @letter_queue
+      return
     end
-    batch = @letter_queue.make_batch(user: current_user)
+    limit = params[:limit].presence&.to_i
+    batch = @letter_queue.make_batch(user: current_user, limit:)
     User::UpdateTasksJob.perform_now(current_user)
     flash[:success] = "now do something with it!"
     redirect_to process_letter_batch_path(batch, uft: @letter_queue.user_facing_title, template: @letter_queue.template)

app/models/letter/queue.rb

@@ -76,7 +76,7 @@ class Letter::Queue < ApplicationRecord
     letter
   end
 
-  def make_batch(user:)
+  def make_batch(user:, limit: nil)
     ActiveRecord::Base.transaction do
       batch = letter_batches.build(
         aasm_state: :fields_mapped,
@@ -93,7 +93,9 @@ class Letter::Queue < ApplicationRecord
         user: user,
       )
       batch.save!
-      letters.queued.each do |letter|
+      queued_letters = letters.queued
+      queued_letters = queued_letters.limit(limit) if limit.present?
+      queued_letters.each do |letter|
         letter.batch_id = batch.id
         letter.batch_from_queue
         letter.save!

app/views/letter/queues/show.html.erb

@@ -88,7 +88,11 @@
 <%= render partial: 'batches/letters_collection', locals: { letters: @letters } %>
 <% if @letter_queue.letters.queued.any? %>
   <div class="mt-4">
-    <%= button_to "make batch!", make_batch_from_letter_queue_path(@letter_queue), class: "btn success" %>
+    <%= form_with url: make_batch_from_letter_queue_path(@letter_queue), method: :post, class: "inline-flex items-center gap-2" do |f| %>
+      <%= f.label :limit, "take" %>
+      <%= f.number_field :limit, min: 1, max: @letters.count, placeholder: "all", class: "w-20" %>
+      <%= f.submit "make batch!", class: "btn success" %>
+    <% end %>
   </div>
 <% end %>
 <hr/>