ap-4508: Add class to handle linked_application_types

app/models/linked_application_type.rb

@@ -0,0 +1,21 @@
+class LinkedApplicationType
+  LINK_TYPES = [
+    { code: "FAMILY", description: "Family" },
+    { code: "LEGAL", description: "Legal" },
+  ].freeze
+
+  def self.link_types
+    LINK_TYPES
+  end
+
+  def self.link_type(code)
+    LINK_TYPES.find { |link_type| link_type[:code] == code }
+  end
+
+  def self.link_description(code)
+    link_type = link_type(code)
+    return nil unless link_type
+
+    link_type[:description]
+  end
+end

spec/models/linked_application_type_spec.rb

@@ -0,0 +1,46 @@
+require "rails_helper"
+
+RSpec.describe LinkedApplicationType do
+  describe ".link_types" do
+    let(:link_types) do
+      [
+        { code: "FAMILY", description: "Family" },
+        { code: "LEGAL", description: "Legal" },
+      ]
+    end
+
+    it "returns link types" do
+      expect(described_class.link_types).to eq link_types
+    end
+  end
+
+  describe ".link_type" do
+    context "when code exists" do
+      let(:family_link_type) { { code: "FAMILY", description: "Family" } }
+
+      it "returns link type" do
+        expect(described_class.link_type("FAMILY")).to eq family_link_type
+      end
+    end
+
+    context "when code does not exist" do
+      it "returns link type" do
+        expect(described_class.link_type("xxx")).to be_nil
+      end
+    end
+  end
+
+  describe ".description" do
+    context "when code exists" do
+      it "returns link type descrition" do
+        expect(described_class.link_description("LEGAL")).to eq "Legal"
+      end
+    end
+
+    context "when code does not exist" do
+      it "returns link type" do
+        expect(described_class.link_description("xxx")).to be_nil
+      end
+    end
+  end
+end