Add feature to list peeps in reverse date order

app.rb

@@ -11,7 +11,7 @@ class Chitter < Sinatra::Base
   end
 
   get "/peeps" do
-    @peeps = Peep.all
+    @peeps = Peep.sort_by_date
     erb(:"peeps/index")
   end
 

lib/peep.rb

@@ -16,7 +16,7 @@ def self.create(message:, date: Date.today.to_s)
       connection = PG.connect(dbname: "chitter")
     end
     result = connection.exec_params(
-      "INSERT into peeps (message, date) VALUES ($1, $2) RETURNING id, message, date", 
+      "INSERT INTO peeps (message, date) VALUES ($1, $2) RETURNING id, message, date", 
       [message, date]
       )
     Peep.new(id: result[0]["id"], message: result[0]["message"], date: result[0]["date"])
@@ -33,4 +33,17 @@ def self.all
       Peep.new(id: peep["id"], message: peep["message"], date: peep["date"])
     end
   end
+
+  def self.sort_by_date
+    if ENV["RACK_ENV"] == "test"
+      connection = PG.connect(dbname: "chitter_test")
+    else
+      connection = PG.connect(dbname: "chitter")
+    end
+    result = connection.exec("SELECT * FROM peeps ORDER BY date DESC")
+    result.map do |peep|
+      Peep.new(id: peep["id"], message: peep["message"], date: peep["date"])
+    end
+  end
+
 end

spec/peep_spec.rb

@@ -25,4 +25,16 @@
       expect(peeps.first.date).to eq(Date.today.to_s)
     end
   end
+
+  describe "::sort_by_date" do
+    it "sorts peeps in reverse chronological order" do
+      first_peep = Peep.create(message: "Test peep 1", date: "2020-01-01")
+      second_peep = Peep.create(message: "Test peep 2", date: "2022-01-01")
+      third_peep = Peep.create(message: "Test peep 3", date: "2021-01-01")
+      sorted_peeps = Peep.sort_by_date
+      expect(sorted_peeps[0].id).to eq(second_peep.id)
+      expect(sorted_peeps[1].id).to eq(third_peep.id)
+      expect(sorted_peeps[2].id).to eq(first_peep.id)
+    end
+  end
 end