Add a simple UI/API to search for MARC records by ISBN and return a r…

…esponse of those records grouped by organization

app/controllers/lookup_controller.rb

@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+##
+# Controller to lookup MARC records based on standard numbers (e.g. ISBN)
+class LookupController < ApplicationController
+  skip_authorization_check
+
+  def index
+    return {} if index_params[:isbn].blank?
+
+    @response = grouped_marc_records
+  end
+
+  def index_params
+    params.permit(:isbn)
+  end
+  helper_method :index_params
+
+  private
+
+  def grouped_marc_records
+    MarcRecord.includes(:organization).where(isbn: index_params[:isbn]).group_by(&:organization).select do |org, _|
+      can? :read, org
+    end
+  end
+end

app/views/lookup/index.html.erb

@@ -0,0 +1,31 @@
+<div class="container">
+  <div class="d-flex justify-content-between">
+    <h1>Marc Records</h1>
+  </div>
+  <%= link_to "view as JSON", url_for(index_params.merge(format: :json)) %>
+
+  <table class="table table-striped organizations">
+    <thead>
+      <tr>
+        <th>marc001</th>
+        <th>Stream</th>
+        <th>Download</th>
+      </tr>
+    </thead>
+    <tbody>
+      <% @response.each do |organization, marc_records| %>
+        <tr>
+          <td colspan="3" class="bg-info font-weight-bold text-white"><%= organization.name %></td>
+        </tr>
+
+        <% marc_records.each do |marc_record| %>
+          <tr>
+            <td><%= marc_record.marc001 %></td>
+            <td><%= link_to(marc_record.stream.display_name, organization_stream_path(organization, marc_record.stream)) %></td>
+            <td><%= link_to('marc21', marc21_organization_marc_record_url(organization, marc_record)) %>, <%= link_to('marcxml', marcxml_organization_marc_record_url(organization, marc_record)) %></td>
+          </tr>
+        <% end %>
+      <% end %>
+    </tbody>
+  </table>
+</div>

app/views/lookup/index.json.jbuilder

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+json.total @response&.values&.sum(&:count) || 0
+json.isbn index_params[:isbn]
+json.organizations @response do |organization, records|
+  json.extract! organization, :id, :name, :slug
+  json.records records do |record|
+    json.extract! record, :id, :marc001, :bytecount, :length, :checksum
+    json.url organization_marc_record_url(record.organization, record)
+  end
+end

config/routes.rb

@@ -6,6 +6,7 @@
   get '/documentation/:id', to: 'pages#show', as: :pages
   get '/api', to: 'pages#api'
 
+  resources :lookup, only: :index
 
   get 'contact_emails/confirm/:token', to: 'contact_emails#confirm', as: :contact_email_confirmation