1 files changed, 154 insertions, 0 deletions
diff --git a/xhtml.cr b/xhtml.cr
new file mode 100644
index 0000000..2dc8aea
--- /dev/null
+++ b/xhtml.cr
@@ -0,0 +1,154 @@
+# XHTML generation
+# Copyright (C) 2023  Nguyễn Gia Phong
+#
+# This file if part of hybring.
+#
+# Hybring is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Hybring is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with hybring.  If not, see <https://www.gnu.org/licenses/>.
+
+require "xml"
+
+def criteria(xml)
+  xml.element "h2" do xml.text "criteria" end
+  xml.element "p" do
+    xml.text "We accept pretty much any site"
+    xml.text " served under an OpenNIC domain"
+    xml.text " meeting the following requirements."
+  end
+  xml.element "ul" do
+    xml.element "li" do xml.text "Family-friendly content" end
+    xml.element "li" do xml.text "No violence incitation or doxing" end
+    xml.element "li" do xml.text "No user tracking" end
+    xml.element "li" do
+      xml.text "ICANN counterpart accessible via HTTPS"
+    end
+    xml.element "li" do
+      xml.text "Both linking to neighboring members"
+    end
+  end
+  xml.element "p" do
+    xml.text "Note that the two sites needn't be the same,"
+    xml.text " but represent the same entity (person or organization)."
+    xml.text "  The clear net site is for serving visitors"
+    xml.text " without OpenNIC access or preferring secure connections."
+  end
+end
+
+def input(xml, name, label, hint, error, value)
+  if error
+    xml.element "span"
+    xml.element "span", class: "error" do xml.text error end
+  end
+  xml.element "label", for: name do xml.text label end
+  xml.element "input", name: name, placeholder: hint, value: value,
+              required: "required"
+end
+
+def form(xml, errors = {} of String => String,
+         params = {} of String => String)
+  # FIXME: get URL from configuration
+  xml.element "form", action: "http://127.0.0.1:8080", method: "POST" do
+    input xml, "nick", "Nickname", "digits and ASCII lowercase letters",
+      errors.fetch("nick", nil), params.fetch("nick", nil)
+    input xml, "opennic", "OpenNIC URL", "e.g. http://example.null",
+      errors.fetch("opennic", nil), params.fetch("opennic", nil)
+    input xml, "icann", "ICANN URL", "e.g. https://example.net",
+      errors.fetch("icann", nil), params.fetch("icann", nil)
+    xml.element "span"
+    xml.element "input", type: "submit", value: "Let me in!"
+  end
+end
+
+def member(xml, nick, opennic, icann, feed? = false)
+  xml.element "p" do
+    xml.text "The following membership is pending for approval."
+    xml.text "  Please subscribe to the "
+    # FIXME: get base URL from configuration
+    xml.element "a", href: "http://127.0.0.1:42069/#{nick}.atom" do
+        xml.text "web feed"
+    end
+    xml.text " for further instructions."
+  end if feed?
+  xml.element "h3" do xml.text nick end
+  xml.text "OpenNIC: "
+  xml.element "a", href: opennic do xml.text opennic end
+  xml.element "br"
+  xml.text "ICANN: "
+  xml.element "a", href: icann do xml.text icann end
+  xml.element "br"
+end
+
+def page(errors = {} of String => String,
+         params = {} of String => String) : String
+  XML.build encoding: "UTF-8", indent: "  " do |xml|
+    xml.element "html", xmlns: "http://www.w3.org/1999/xhtml", lang: "en" do
+      xml.element "head" do
+        xml.element "meta", name: "viewport",
+                    content: "width=device-width,initial-scale=1.0"
+        xml.element "link", rel: "icon", href: "data:,"
+        xml.element "link", rel: "stylesheet",
+                    # FIXME: get base URL from configuration
+                    href: "http://127.0.0.1:42069/style.css"
+        xml.element "title" do xml.text "le cercle libre" end
+      end
+      xml.element "body" do
+        xml.element "h1" do xml.text "le cercle libre" end
+        xml.element "p" do
+          xml.text "The Free Circle is a web ring for sites"
+          xml.text " with an OpenNIC domain."
+        end
+        criteria xml
+
+        xml.element "h2" do xml.text "joining" end
+        # FIXME: query database for this
+        left = right = "http://cercle.libre"
+        if params.empty? # static page
+          xml.element "p" do
+            xml.text "First, add "
+            xml.element "a",
+                        href: "https://html.spec.whatwg.org/#the-a-element" do
+                xml.text "anchors"
+            end
+            xml.text " refering to the following neighbors to your sites"
+            xml.text " on both OpenNIC and ICANN domains."
+            xml.text "  Your neighbors will change as people come and go,"
+            xml.text " so you will be given an Atom feed with instructions"
+            xml.text " to keep the hyperlinks up to date."
+          end
+          xml.element "ul" do
+            xml.element "li" do
+              xml.text "Left: "
+              xml.element "a", href: left do xml.text left end
+            end
+            xml.element "li" do
+              xml.text "Right: "
+              xml.element "a", href: right do xml.text right end
+            end
+          end
+
+          xml.element "p" do
+            xml.text "Then, please fill out the form below."
+          end
+          form xml
+          xml.element "h2" do xml.text "members" end
+          # FIXME: query database for this
+          member xml, "self", "http://cercle.libre", "https://khoanh.loang.net"
+        elsif errors.empty?
+          member xml, params["nick"], params["opennic"], params["icann"], true
+        else
+          form xml, errors, params
+        end
+      end
+    end
+  end
+end