FEATURE: add welcome topic cta banner (#17821)

spec/models/site_spec.rb

@@ -183,4 +183,50 @@ RSpec.describe Site do
     expect(data["auth_providers"].map { |a| a["name"] }).to contain_exactly('facebook', 'twitter')
   end
 
+  describe ".show_welcome_topic_banner?" do
+    it "returns false when the user is not admin" do
+      first_post = Fabricate(:post, created_at: 25.days.ago)
+      SiteSetting.welcome_topic_id = first_post.topic.id
+
+      expect(Site.show_welcome_topic_banner?(Guardian.new(Fabricate(:user)))).to eq(false)
+    end
+
+    it "returns false when the user is not first admin who logs in" do
+      first_post = Fabricate(:post, created_at: 25.days.ago)
+      SiteSetting.welcome_topic_id = first_post.topic.id
+
+      expect(Site.show_welcome_topic_banner?(Guardian.new(Fabricate(:admin)))).to eq(false)
+    end
+
+    it "returns true when welcome topic is less than month old" do
+      admin = Fabricate(:admin)
+      UserAuthToken.generate!(user_id: admin.id)
+
+      first_post = Fabricate(:post, created_at: 25.days.ago)
+      SiteSetting.welcome_topic_id = first_post.topic.id
+
+      expect(Site.show_welcome_topic_banner?(Guardian.new(admin))).to eq(true)
+    end
+
+    it "returns false when welcome topic is more than month old" do
+      admin = Fabricate(:admin)
+      UserAuthToken.generate!(user_id: admin.id)
+
+      first_post = Fabricate(:post, created_at: 35.days.ago)
+      SiteSetting.welcome_topic_id = first_post.topic.id
+
+      expect(Site.show_welcome_topic_banner?(Guardian.new(admin))).to eq(false)
+    end
+
+    it "returns false when welcome topic has been edited" do
+      admin = Fabricate(:admin)
+      UserAuthToken.generate!(user_id: admin.id)
+
+      first_post = Fabricate(:post, version: 2, created_at: 25.days.ago)
+      SiteSetting.welcome_topic_id = first_post.topic.id
+
+      expect(Site.show_welcome_topic_banner?(Guardian.new(admin))).to eq(false)
+    end
+  end
+
 end

spec/requests/api/schemas/json/site_response.json

@@ -685,6 +685,9 @@
           ]
         }
     },
+    "show_welcome_topic_banner": {
+      "type": "boolean"
+    },
     "archetypes": {
       "type": "array",
       "items":

spec/serializers/site_serializer_spec.rb

@@ -112,4 +112,16 @@ RSpec.describe SiteSerializer do
     serialized = described_class.new(Site.new(admin_guardian), scope: admin_guardian, root: false).as_json
     expect(serialized[:shared_drafts_category_id]).to eq(nil)
   end
+
+  it 'includes show_welcome_topic_banner' do
+    admin = Fabricate(:admin)
+    admin_guardian = Guardian.new(admin)
+    UserAuthToken.generate!(user_id: admin.id)
+
+    first_post = Fabricate(:post, created_at: 25.days.ago)
+    SiteSetting.welcome_topic_id = first_post.topic.id
+
+    serialized = described_class.new(Site.new(admin_guardian), scope: admin_guardian, root: false).as_json
+    expect(serialized[:show_welcome_topic_banner]).to eq(true)
+  end
 end