I'm feeling lucky feature (#53)

* feat: Add GET /announcements/random endpoint

* test: Add controller spec for GET /announcements/random

* New line

* refact: Fixes based on feedback

config/routes.cr

@@ -23,6 +23,7 @@ Amber::Server.configure do |app|
 
   routes :web do
     resources "/announcements", AnnouncementController
+    get "/announcements/random", AnnouncementController, :random
     get "/=:hashid", AnnouncementController, :expand
     get "/rss", RSSController, :show
     get "/sessions/new", SessionsController, :new

spec/controllers/announcement_controller_spec.cr

@@ -357,4 +357,14 @@ describe AnnouncementController do
       end
     end
   end
+
+  describe "GET random" do
+    before { announcement }
+
+    it "redirects to a random announcement" do
+      get "/announcements/random"
+      expect(response.status_code).to eq 302
+      expect(response).to redirect_to "/announcements/#{announcement.id}"
+    end
+  end
 end

spec/models/announcement_spec.cr

@@ -112,4 +112,17 @@ describe Announcement do
       expect(hashid).to eq "D49Nz"
     end
   end
+
+  describe ".random" do
+    let!(:ann) { announcement(user.tap &.save).tap &.save }
+
+    before do
+      Announcement.clear
+      User.clear
+    end
+
+    it "returns random announcements" do
+      expect(Announcement.random.not_nil!.id).to eq ann.id
+    end
+  end
 end

src/controllers/announcement_controller.cr

@@ -83,6 +83,14 @@ class AnnouncementController < ApplicationController
     end
   end
 
+  def random
+    if announcement = Announcement.random
+      redirect_to "/announcements/#{announcement.id}"
+    else
+      redirect_to "/"
+    end
+  end
+
   private def announcement_params
     params.to_h.select %w(title description type)
   end

src/models/announcement.cr

@@ -101,4 +101,8 @@ class Announcement < Granite::ORM::Base
   def content
     Autolink.auto_link(Markdown.to_html(description.not_nil!))
   end
+
+  def self.random
+    Announcement.all("ORDER BY RANDOM() LIMIT 1").first?
+  end
 end

src/views/layouts/_search.slang

@@ -9,3 +9,5 @@ aside.widget.search
       input type="hidden" name="user" value="#{user}"
     - if type
       input type="hidden" name="type" value="#{type}"
+  a href="/announcements/random"
+    | I'm feeling lucky!