From 743d9e5fa9bca08a196ceb21617cd3c80aaac3ef Mon Sep 17 00:00:00 2001
From: Edward Loveall <edward@edwardloveall.com>
Date: Sun, 4 Jul 2021 17:37:45 -0400
Subject: [PATCH] Render a User Anchor

---
 spec/classes/markup_converter_spec.cr | 35 +++++++++++++++++++++++++++
 spec/components/page_content_spec.cr  | 10 ++++++++
 src/classes/markup_converter.cr       |  8 +++++-
 src/clients/medium_client.cr          |  1 +
 src/components/page_content.cr        |  4 +++
 src/models/nodes.cr                   | 21 +++++++++++++++-
 src/models/post_response.cr           |  1 +
 7 files changed, 78 insertions(+), 2 deletions(-)

diff --git a/spec/classes/markup_converter_spec.cr b/spec/classes/markup_converter_spec.cr
index 45c295f..8f5ed09 100644
--- a/spec/classes/markup_converter_spec.cr
+++ b/spec/classes/markup_converter_spec.cr
@@ -129,4 +129,39 @@ describe MarkupConverter do
       Anchor.new(text: "Link", href: "https://example.com")
     ])
   end
+
+  it "renders an A USER markup" do
+    json = <<-JSON
+      {
+        "text": "Hi Dr Nick!",
+        "type": "P",
+        "markups": [
+          {
+            "title": null,
+            "type": "A",
+            "href": null,
+            "userId": "abc123",
+            "start": 3,
+            "end": 10,
+            "rel": null,
+            "anchorType": "USER"
+          }
+        ],
+        "href": null,
+        "iframe": null,
+        "layout": null,
+        "metadata": null
+      }
+    JSON
+
+    paragraph = PostResponse::Paragraph.from_json(json)
+
+    result = MarkupConverter.convert(text: paragraph.text, markups: paragraph.markups)
+
+    result.should eq([
+      Text.new("Hi "),
+      UserAnchor.new(text: "Dr Nick", userId: "abc123"),
+      Text.new("!"),
+    ])
+  end
 end
diff --git a/spec/components/page_content_spec.cr b/spec/components/page_content_spec.cr
index 06cd479..ff25dac 100644
--- a/spec/components/page_content_spec.cr
+++ b/spec/components/page_content_spec.cr
@@ -196,4 +196,14 @@ describe PageContent do
 
     html.should eq %(<ul><li>Apple</li><li>Banana</li></ul>)
   end
+
+  it "renders a user anchor" do
+    page = Page.new(nodes: [
+      UserAnchor.new(userId: "abc123", text: "Some User"),
+    ] of Child)
+
+    html = PageContent.new(page: page).render_to_string
+
+    html.should eq %(<a href="https://medium.com/u/abc123">Some User</a>)
+  end
 end
diff --git a/src/classes/markup_converter.cr b/src/classes/markup_converter.cr
index e02783c..5830d77 100644
--- a/src/classes/markup_converter.cr
+++ b/src/classes/markup_converter.cr
@@ -38,7 +38,13 @@ class MarkupConverter
       else
         case markup.type
         when PostResponse::MarkupType::A
-          container = Anchor.new(href: markup.href || "#", text: to_be_marked)
+          if href = markup.href
+            container = Anchor.new(href: href, text: to_be_marked)
+          elsif userId = markup.userId
+            container = UserAnchor.new(userId: userId, text: to_be_marked)
+          else
+            container = Empty.new
+          end
         when PostResponse::MarkupType::CODE
           container = construct_markup(text: to_be_marked, container: Code)
         when PostResponse::MarkupType::EM
diff --git a/src/clients/medium_client.cr b/src/clients/medium_client.cr
index 82b9f4a..10d567e 100644
--- a/src/clients/medium_client.cr
+++ b/src/clients/medium_client.cr
@@ -39,6 +39,7 @@ class MediumClient
                   name
                   type
                   href
+                  userId
                   start
                   end
                 }
diff --git a/src/components/page_content.cr b/src/components/page_content.cr
index df68634..52c4eb3 100644
--- a/src/components/page_content.cr
+++ b/src/components/page_content.cr
@@ -85,4 +85,8 @@ class PageContent < BaseComponent
   def render_child(node : UnorderedList)
     ul { render_children(node.children) }
   end
+
+  def render_child(node : UserAnchor)
+    a(href: node.href) { text node.text }
+  end
 end
diff --git a/src/models/nodes.cr b/src/models/nodes.cr
index a8cab7a..b533099 100644
--- a/src/models/nodes.cr
+++ b/src/models/nodes.cr
@@ -1,5 +1,5 @@
 module Nodes
-  alias Leaf = Text | Image | IFrame | Anchor
+  alias Leaf = Text | Image | IFrame | Anchor | UserAnchor
   alias Child = Container | Leaf | Empty
   alias Children = Array(Child)
 
@@ -120,4 +120,23 @@ module Nodes
       false
     end
   end
+
+  class UserAnchor
+    USER_BASE_URL = "https://medium.com/u/"
+
+    getter href : String
+    getter text : String
+
+    def initialize(userId : String, @text : String)
+      @href = USER_BASE_URL + userId
+    end
+
+    def ==(other : UserAnchor)
+      other.href == href && other.text == text
+    end
+
+    def empty?
+      false
+    end
+  end
 end
diff --git a/src/models/post_response.cr b/src/models/post_response.cr
index c8447cc..31bf0ae 100644
--- a/src/models/post_response.cr
+++ b/src/models/post_response.cr
@@ -55,6 +55,7 @@ class PostResponse
     property title : String?
     property type : MarkupType
     property href : String?
+    property userId : String?
     property start : Int32
     property end : Int32
     property anchorType : AnchorType?