Feature/add parler.io liquid tag for audio embed (#828)

* initial parler liquid tag

* fix eqaulity in test

* update parler tag to parse out url since it is coming in as <ahref>

app/liquid_tags/parler_tag.rb

@@ -0,0 +1,35 @@
+class ParlerTag < LiquidTagBase
+  def initialize(tag_name, id, tokens)
+    super
+    @id = parse_id(id)
+    @width = 710
+    @height = 120
+  end
+
+  def render(_context)
+    html = <<-HTML
+    <iframe
+      width="#{@width}"
+      height="#{@height}"
+      src="https://api.parler.io/ss/player?url=#{@id}">
+    </iframe>
+    HTML
+    finalize_html(html)
+  end
+
+  private
+
+  def parse_id(input)
+    input_no_space = input.delete(" ")
+    input_no_space = input_no_space.scan(/\bhttps?:\/\/[a-z.\/0-9-]+\b/).first
+    raise StandardError, "Invalid Parler URL" unless valid_id?(input_no_space)
+    input_no_space
+  end
+
+  def valid_id?(id)
+    puts id
+    id =~ /\A(https:\/\/www.parler.io\/audio\/\d{1,11}\/[a-zA-Z0-9]{11,40}.[0-9a-zA-Z-]{11,36}.mp3)\Z/
+  end
+end
+
+Liquid::Template.register_tag("parler", ParlerTag)

spec/liquid_tags/parler_tag_spec.rb

@@ -0,0 +1,32 @@
+require "rails_helper"
+
+RSpec.describe ParlerTag, type: :liquid_template do
+  describe "#id" do
+    let(:valid_id) { "https://www.parler.io/audio/73240183203/d53cff009eac2ab1bc9dd8821a638823c39cbcea.7dd28611-b7fc-4cf8-9977-b6e3aaf644a1.mp3" }
+
+    let(:invalid_id) { "https://www.google.com" }
+
+    def generate_new_liquid(id)
+      Liquid::Template.register_tag("parler", ParlerTag)
+      Liquid::Template.parse("{% parler #{id} %}")
+    end
+
+    def generate_iframe(_id)
+      "<iframe "\
+        "width=\"710\" "\
+        "height=\"120\" "\
+        "src=\"https://api.parler.io/ss/player?url=#{valid_id}\"> "\
+      "</iframe>"
+    end
+
+    it "accepts a valid Parler URL" do
+      liquid = generate_new_liquid(valid_id)
+      puts liquid
+      expect(liquid.render).to eq(generate_iframe(valid_id))
+    end
+
+    it "raises an error for invalid IDs" do
+      expect { generate_new_liquid(invalid_id).render }.to raise_error("Invalid Parler URL")
+    end
+  end
+end