Better error pages

Instead of showing the default Lucky error page, the styles now match
Scribe. In addition, if a URL can't be parsed, Scribe gives some
information as to why this might be (that Scribe can only deal with an
article pages)

CHANGELOG

@@ -1,3 +1,8 @@
+2022-02-12
+
+* Error page matches Scribe styles
+* New error page for not being able to parse article URL
+
 2022-01-30
 
 * Fix bug in markup generation for text with multiple codepoints

src/actions/articles/show.cr

@@ -10,9 +10,10 @@ class Articles::Show < BrowserAction
       html ShowPage, page: page
     in Monads::Nothing, Monads::Maybe
       html(
-        Errors::ShowPage,
+        Errors::ParseErrorPage,
         message: "Error parsing the URL",
         status_code: 500,
+        original_path: request.path,
       )
     end
   end

src/pages/errors/parse_error_page.cr

@@ -0,0 +1,32 @@
+class Errors::ParseErrorPage < MainLayout
+  needs message : String
+  needs status_code : Int32
+  needs original_path : String
+
+  def page_title
+    "Error"
+  end
+
+  def content
+    h1 status_code
+    h2 message
+    article do
+      what_can_scribe_show
+      mount Shared::LayoutFooter
+    end
+  end
+
+  private def what_can_scribe_show
+    section do
+      para <<-TEXT
+        Scribe just tried to parse the Medium URL but wasn't able to. Scribe is
+        only built to display articles. It's not built to browse or search
+        Medium, it's users, hashtags, comments, or anything else.
+      TEXT
+      para do
+        text "If you like, you can try visiting "
+        a "this page on medium.com", href: "https://medium.com#{original_path}"
+      end
+    end
+  end
+end

src/pages/errors/show_page.cr

@@ -1,93 +1,15 @@
-class Errors::ShowPage
-  include Lucky::HTMLPage
-
+class Errors::ShowPage < MainLayout
   needs message : String
   needs status_code : Int32
 
-  def render
-    html_doctype
-    html lang: "en" do
-      head do
-        utf8_charset
-        title "Something went wrong"
-        load_lato_font
-        normalize_styles
-        error_page_styles
-      end
+  def content
+    h1 status_code
+    h2 message
 
-      body do
-        div class: "container" do
-          h2 status_code, class: "status-code"
-          h1 message, class: "message"
-
-          ul class: "helpful-links" do
-            li do
-              a "Try heading back to home", href: "/", class: "helpful-link"
-            end
-          end
-        end
+    article do
+      para do
+        a "Try heading back to home", href: "/"
       end
     end
   end
-
-  def load_lato_font
-    css_link "https://fonts.googleapis.com/css?family=Lato"
-  end
-
-  def normalize_styles
-    style <<-CSS
-      /*! normalize.css v7.0.0 | MIT License | github.com/necolas/normalize.css */html{line-height:1.15;-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%}body{margin:0}article,aside,footer,header,nav,section{display:block}h1{font-size:2em;margin:.67em 0}figcaption,figure,main{display:block}figure{margin:1em 40px}hr{box-sizing:content-box;height:0;overflow:visible}pre{font-family:monospace,monospace;font-size:1em}a{background-color:transparent;-webkit-text-decoration-skip:objects}abbr[title]{border-bottom:none;text-decoration:underline;text-decoration:underline dotted}b,strong{font-weight:inherit}b,strong{font-weight:bolder}code,kbd,samp{font-family:monospace,monospace;font-size:1em}dfn{font-style:italic}mark{background-color:#ff0;color:#000}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}audio,video{display:inline-block}audio:not([controls]){display:none;height:0}img{border-style:none}svg:not(:root){overflow:hidden}button,input,optgroup,select,textarea{font-family:sans-serif;font-size:100%;line-height:1.15;margin:0}button,input{overflow:visible}button,select{text-transform:none}[type=reset],[type=submit],button,html [type=button]{-webkit-appearance:button}[type=button]::-moz-focus-inner,[type=reset]::-moz-focus-inner,[type=submit]::-moz-focus-inner,button::-moz-focus-inner{border-style:none;padding:0}[type=button]:-moz-focusring,[type=reset]:-moz-focusring,[type=submit]:-moz-focusring,button:-moz-focusring{outline:1px dotted ButtonText}fieldset{padding:.35em .75em .625em}legend{box-sizing:border-box;color:inherit;display:table;max-width:100%;padding:0;white-space:normal}progress{display:inline-block;vertical-align:baseline}textarea{overflow:auto}[type=checkbox],[type=radio]{box-sizing:border-box;padding:0}[type=number]::-webkit-inner-spin-button,[type=number]::-webkit-outer-spin-button{height:auto}[type=search]{-webkit-appearance:textfield;outline-offset:-2px}[type=search]::-webkit-search-cancel-button,[type=search]::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}details,menu{display:block}summary{display:list-item}canvas{display:inline-block}template{display:none}[hidden]{display:none}
-    CSS
-  end
-
-  def error_page_styles
-    style <<-CSS
-      body {
-        background-color: #f5f5f5;
-        color: #000;
-        font-family: 'Lato', sans-serif;
-        padding-top: 100px;
-      }
-
-      .helpful-links {
-        list-style-type: none;
-        margin: 0;
-        padding: 0;
-      }
-
-      .helpful-link {
-        color: #15A38B;
-      }
-
-      .status-code {
-        opacity: 0.4;
-        font-size: 26px;
-        font-weight: normal;
-      }
-
-      .message {
-        font-size: 34px;
-        line-height: 56px;
-        font-weight: normal;
-      }
-
-      .container {
-        margin: 0 auto;
-        max-width: 450px;
-        padding: 55px;
-      }
-
-      @media only screen and (max-width: 500px) {
-        .status-code {
-          font-size: 18px;
-        }
-
-        .message {
-          font-size: 26px;
-          line-height: 40px;
-          margin: 20px 0 35px 0;
-        }
-      }
-    CSS
-  end
 end