WIP Render nostr profile and relay status with Ruby

app/components/settings/nostr_profile_status_component.html.erb

@@ -0,0 +1,7 @@
+<% @statuses.each do |status| %>
+  <%= render StatusTextComponent.new(
+    text: status[:text],
+    icon_name: status[:icon_name],
+    icon_color: status[:icon_color]
+  ) %>
+<% end %>

app/components/settings/nostr_profile_status_component.rb

@@ -0,0 +1,46 @@
+# frozen_string_literal: true
+
+module Settings
+  class NostrProfileStatusComponent < ViewComponent::Base
+    def initialize(profile_event:, user_address:)
+      if profile_event.present?
+        profile = JSON.parse(profile_event["content"])
+        @statuses = []
+
+        if profile["nip05"].present? && profile["nip05"] == user_address
+          @statuses.push({
+            text: "Your profile's Nostr address is set to <strong>#{ user_address }</strong>",
+            icon_name: "check-circle",
+            icon_color: "emerald-500"
+          })
+        else
+          @statuses.push({
+            text: "Your profile's Nostr address is not set to <strong>#{ user_address }</strong> yet",
+            icon_name: "alert-octagon",
+            icon_color: "amber-500"
+          })
+        end
+
+        if profile["lud16"].present? && profile["lud16"] == user_address
+          @statuses.push({
+            text: "Your profile's Lightning address is set to <strong>#{ user_address }</strong>",
+            icon_name: "check-circle",
+            icon_color: "emerald-500"
+          })
+        else
+          @statuses.push({
+            text: "Your profile's Lightning address is not set to <strong>#{ user_address }</strong> yet",
+            icon_name: "alert-octagon",
+            icon_color: "amber-500"
+          })
+        end
+      else
+          @statuses.push({
+          text: "We could not find a profile for your public key",
+          icon_name: "alert-octagon",
+          icon_color: "amber-500"
+        })
+      end
+    end
+  end
+end

app/components/settings/nostr_relay_status_component.html.erb

@@ -0,0 +1,4 @@
+<%= render StatusTextComponent.new(
+  text: @text,
+  icon_name: @icon_name,
+  icon_color: @icon_color) %>

app/components/settings/nostr_relay_status_component.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+module Settings
+  class NostrRelayStatusComponent < ViewComponent::Base
+    def initialize(relay_urls:)
+      if relay_urls.present?
+        if relay_urls.any? { |r| r.include?("wss://nostr.kosmos.org") }
+          @text = "You have a relay list, and the Kosmos relay is part of it"
+          @icon_name = "check-circle"
+          @icon_color = "emerald-500"
+        else
+          @text = "The Kosmos relay is missing from your relay list"
+          @icon_name = "alert-octagon"
+          @icon_color = "amber-500"
+        end
+      else
+        @text = "We could not find a relay list for your public key"
+        @icon_name = "alert-octagon"
+        @icon_color = "amber-500"
+      end
+    end
+  end
+end

app/components/status_text_component.html.erb

@@ -0,0 +1,8 @@
+<p class="flex gap-x-4 items-center">
+  <span class="inline-block h-6 w-6 grow-0 text-<%= @icon_color %>">
+    <%= render "icons/#{@icon_name}" %>
+  </span>
+  <span>
+    <%= raw @text %>
+  </span>
+</p>

app/components/status_text_component.rb

@@ -0,0 +1,7 @@
+class StatusTextComponent < ViewComponent::Base
+  def initialize(text:, icon_name:, icon_color:)
+    @text = text
+    @icon_name = icon_name
+    @icon_color = icon_color
+  end
+end

app/controllers/settings_controller.rb

@@ -4,8 +4,13 @@ require "bcrypt"
 class SettingsController < ApplicationController
   before_action :authenticate_user!
   before_action :set_main_nav_section
-  before_action :set_settings_section, only: [:show, :update, :update_email, :reset_email_password]
+  before_action :set_settings_section, only: [
-  before_action :set_user, only: [:show, :update, :update_email, :reset_email_password]
+    :show, :update, :update_email, :reset_email_password
+  ]
+  before_action :set_user, only: [
+    :show, :update, :update_email, :reset_email_password,
+    :fetch_nostr_user_metadata
+  ]
 
   def index
     redirect_to setting_path(:profile)
@@ -128,6 +133,20 @@ class SettingsController < ApplicationController
     }
   end
 
+  def fetch_nostr_user_metadata
+    if @user.nostr_pubkey.present?
+      if @nip65_event = NostrManager::DiscoverUserRelays.call(pubkey: @user.nostr_pubkey)
+        @relay_urls = @nip65_event["tags"].select{ |t| t[0] == "r" }&.map{ |t| t[1] }
+      end
+
+      @profile = NostrManager::DiscoverUserProfile.call(pubkey: @user.nostr_pubkey, relays: @relay_urls)
+    else
+      @relays, @profile = [nil, nil]
+    end
+
+    render partial: 'nostr_user_relays'
+  end
+
   private
 
     def set_main_nav_section

app/javascript/controllers/settings/nostr_pubkey_controller.js

@@ -23,11 +23,11 @@ export default class extends Controller {
       }
 
       if (this.pubkeyHexValue) {
-        this.discoverUserOnNostr().then(() => {
+        // this.discoverUserOnNostr().then(() => {
-          this.renderRelayStatus()
+        //   this.renderRelayStatus()
-          this.renderProfileNip05Status()
+        //   this.renderProfileNip05Status()
-          this.renderProfileLud16Status()
+        //   this.renderProfileLud16Status()
-        })
+        // })
       }
     } else {
       this.noExtensionTarget.classList.remove("hidden")

app/models/concerns/settings/nostr_settings.rb

@@ -20,6 +20,19 @@ module Settings
 
       field :nostr_zaps_relay_limit, type: :integer,
         default: 12
+
+      field :nostr_discovery_relays, type: :array, default: %w[
+        wss://nostr.kosmos.org
+        wss://purplepag.es
+        wss://relay.nostr.band
+        wss://njump.me
+        wss://relay.damus.io
+      ]
+
+      def self.nostr_relay_url_http
+        self.nostr_relay_url.gsub(/^ws:/, "http:")
+                            .gsub(/^wss:/, "https:")
+      end
     end
   end
 end

app/services/nostr_manager/discover_user_profile.rb

@@ -0,0 +1,36 @@
+module NostrManager
+  class DiscoverUserProfile < NostrManagerService
+    MAX_EVENTS = 2
+
+    def initialize(pubkey:, relays: nil)
+      @pubkey = pubkey
+      @relays = relays.present? ? relays : Setting.nostr_discovery_relays
+    end
+
+    def call
+      received_events = 0
+      profile_events = []
+      filter = Nostr::Filter.new(
+        authors: [@pubkey],
+        kinds: [0],
+        limit: 1,
+      )
+
+      @relays.each do |url|
+        event = NostrManager::FetchLatestEvent.call(filter: filter, relay_url: url)
+
+        if event.present?
+          profile_events << event if profile_events.none? { |e| e["id"] == event["id"] }
+          received_events += 1
+        end
+
+        if received_events >= MAX_EVENTS
+          puts "Found #{MAX_EVENTS} events, ending the search"
+          break
+        end
+      end
+
+      profile_events.min_by { |e| e["created_at"] }
+    end
+  end
+end

app/services/nostr_manager/discover_user_relays.rb

@@ -0,0 +1,37 @@
+module NostrManager
+  class DiscoverUserRelays < NostrManagerService
+    MAX_EVENTS = 2
+
+    def initialize(pubkey:)
+      @pubkey = pubkey
+      @relays = Setting.nostr_discovery_relays
+    end
+
+    def call
+      received_events = 0
+      nip65_events = []
+      user_relays = []
+      filter = Nostr::Filter.new(
+        authors: [@pubkey],
+        kinds: [10002],
+        limit: 1,
+      )
+
+      @relays.each do |url|
+        event = NostrManager::FetchLatestEvent.call(filter: filter, relay_url: url)
+
+        if event.present?
+          nip65_events << event if nip65_events.none? { |e| e["id"] == event["id"] }
+          received_events += 1
+        end
+
+        if received_events >= MAX_EVENTS
+          puts "Found #{MAX_EVENTS} events, ending the search"
+          break
+        end
+      end
+
+      nip65_events.min_by { |e| e["created_at"] }
+    end
+  end
+end

app/services/nostr_manager/fetch_latest_event.rb

@@ -0,0 +1,59 @@
+module NostrManager
+  class FetchLatestEvent < NostrManagerService
+    TIMEOUT = 1
+
+    def initialize(filter:, relay_url:)
+      @filter = filter
+      @relay = new_relay(relay_url)
+      @client = Nostr::Client.new
+    end
+
+    def call
+      filter, client, relay = @filter, @client, @relay
+      latest_event = nil
+      mutex = Mutex.new
+      received_event = ConditionVariable.new
+      log_prefix = "[nostr][#{@relay.name}]"
+
+      thread = Thread.new do
+        client.on :connect do
+          client.subscribe(filter: filter)
+        end
+
+        client.on :error do |e|
+          Rails.logger.info "#{log_prefix} Error: #{e}"
+          Thread.current.exit
+        end
+
+        client.on :message do |m|
+          msg = JSON.parse(m) rescue nil
+          if msg && msg[0] == "EVENT" && msg[2]
+            puts "#{log_prefix} Event received: #{msg[2]["id"]}"
+            mutex.synchronize do
+              latest_event = msg[2]
+              received_event.signal
+            end
+          elsif msg && msg[0] == "EOSE"
+            Thread.current.exit
+          end
+        end
+
+        client.connect relay
+      end
+
+      begin
+        Timeout.timeout(TIMEOUT) do
+          mutex.synchronize do
+            received_event.wait(mutex) if latest_event.nil?
+          end
+        end
+      rescue Timeout::Error
+        puts "#{log_prefix} Timeout: No event received within #{TIMEOUT} seconds"
+      ensure
+        thread.exit
+      end
+
+      latest_event
+    end
+  end
+end

app/services/nostr_manager_service.rb

@@ -3,6 +3,7 @@ require "nostr"
 class NostrManagerService < ApplicationService
   def parse_tags(tags)
     out = {}
+    # TODO support more than 1 item for each tag type
     tags.each do |tag|
       out[tag[0].to_sym] = tag[1, tag.length]
     end
@@ -19,4 +20,8 @@ class NostrManagerService < ApplicationService
   def site_user
     Nostr::User.new(keypair: site_keypair)
   end
+
+  def new_relay(url)
+    Nostr::Relay.new(url: url, name: URI.parse(url).host)
+  end
 end

app/views/admin/settings/services/_nostr.html.erb

@@ -31,13 +31,28 @@
       ) %>
 </ul>
 </section>
+
 <section>
 <h3>Zaps</h3>
 <ul role="list">
   <%= render FormElements::FieldsetResettableSettingComponent.new(
         key: :nostr_zaps_relay_limit,
         title: "Relay limit",
-        description: "The maximum number of relays to publish zap receipts to"
+        description: "The maximum number of sender-defined relays to try to publish zap receipts to"
       ) %>
 </ul>
+</section>
+
+<section>
+<h3>Onboarding</h3>
+<ul role="list">
+  <%= render FormElements::FieldsetComponent.new(
+        title: "Discovery relays",
+        description: "Used to discover a user's published relay list and/or profile"
+      ) do %>
+    <%= f.text_area :nostr_discovery_relays,
+      value: Setting.nostr_discovery_relays.join("\n"),
+      class: "h-44 w-80" %>
+  <% end %>
+</ul>
 <% end %>

app/views/settings/_nostr.html.erb

@@ -3,7 +3,7 @@
      data-settings--nostr-pubkey-site-value="<%= Setting.accounts_domain %>"
      data-settings--nostr-pubkey-shared-secret-value="<%= session[:shared_secret] %>"
      data-settings--nostr-pubkey-pubkey-hex-value="<%= current_user.nostr_pubkey %>">
-  <section>
+  <section class="mb-8 sm:mb-12">
     <h3>Nostr</h3>
     <h4 class="mb-0">
       Public Key
@@ -26,8 +26,16 @@
     <% else %>
     <p class="my-4">
       Verify your Nostr public key with us in order to enable Nostr-specific
-      features for your account.
+      features for your account:
     </p>
+    <ul class="list-disc list-inside">
+      <li>Log in with Nostr (no password needed)</li>
+      <li>Verified Nostr address</li>
+      <li>Receive zaps in your Lightning account</li>
+      <% if Setting.nostr_relay_url.present? %>
+      <li>Publish notes on <%= link_to "our relay", Setting.nostr_relay_url_http, class: "ks-text-link", target: "_blank" %></li>
+      <% end %>
+    </ul>
     <% end %>
 
     <div data-settings--nostr-pubkey-target="noExtension"
@@ -75,110 +83,8 @@
   </section>
 
   <% if current_user.nostr_pubkey.present? %>
-    <section>
+    <%= turbo_frame_tag "nostr_user_metadata", src: nostr_user_metadata_settings_path do %>
-      <h3>Profile</h3>
+      <p>Loading...</p>
-      <div data-settings--nostr-pubkey-target="profileStatus" class="mb-4">
+    <% end %>
-        <p class="status-green hidden flex gap-x-4 items-center">
-          <span class="inline-block h-6 w-6 grow-0 text-emerald-500 %>">
-            <%= render "icons/check-circle" %>
-          </span>
-          <span>
-            You already have a profile for your public key
-          </span>
-        </p>
-        <p class="status-orange hidden flex gap-x-4 items-center">
-          <span class="inline-block h-6 w-6 grow-0 text-amber-500 %>">
-            <%= render "icons/alert-octagon" %>
-          </span>
-          <span>
-            <strong><%= current_user.address %></strong> is not set as your Nostr address
-          </span>
-        </p>
-      </div>
-      <div data-settings--nostr-pubkey-target="profileStatusNip05" class="mb-4">
-        <p class="status-green hidden flex gap-x-4 items-center">
-          <span class="inline-block h-6 w-6 grow-0 text-emerald-500 %>">
-            <%= render "icons/check-circle" %>
-          </span>
-          <span>
-            <strong><%= current_user.address %></strong> is set as your Nostr address
-          </span>
-        </p>
-        <p class="status-orange hidden flex gap-x-4 items-center">
-          <span class="inline-block h-6 w-6 grow-0 text-amber-500 %>">
-            <%= render "icons/alert-octagon" %>
-          </span>
-          <span>
-            <strong><%= current_user.address %></strong> is not set as your Nostr address
-          </span>
-        </p>
-        <p class="status-red hidden flex gap-x-4 items-center">
-          <span class="inline-block h-6 w-6 grow-0 text-amber-500 %>">
-            <%= render "icons/alert-octagon" %>
-          </span>
-          <span>
-            Your profile's Nostr address is not set to <strong><%= current_user.address %></strong> yet
-          </span>
-        </p>
-      </div>
-      <div data-settings--nostr-pubkey-target="profileStatusLud16">
-        <p class="status-green hidden flex gap-x-4 items-center">
-          <span class="inline-block h-6 w-6 grow-0 text-emerald-500 %>">
-            <%= render "icons/check-circle" %>
-          </span>
-          <span>
-            <strong><%= current_user.address %></strong> is set as your Lightning address
-          </span>
-        </p>
-        <p class="status-orange hidden flex gap-x-4 items-center">
-          <span class="inline-block h-6 w-6 grow-0 text-amber-500 %>">
-            <%= render "icons/alert-octagon" %>
-          </span>
-          <span>
-            <strong><%= current_user.address %></strong> is not set as your Lightning address yet
-          </span>
-        </p>
-        <p class="status-red hidden flex gap-x-4 items-center">
-          <span class="inline-block h-6 w-6 grow-0 text-amber-500 %>">
-            <%= render "icons/alert-octagon" %>
-          </span>
-          <span>
-            Your profile's Lightning address is not set to <strong><%= current_user.address %></strong> yet
-          </span>
-        </p>
-      </div>
-    </section>
-
-    <section>
-      <h3>Relays</h3>
-      <div data-settings--nostr-pubkey-target="relayListStatus">
-        <p class="status-green hidden flex gap-x-4 items-center">
-          <span class="inline-block h-6 w-6 grow-0 text-emerald-500 %>">
-            <%= render "icons/check-circle" %>
-          </span>
-          <span>
-            You have a relay list, and the Kosmos relay is part of it
-          </span>
-        </p>
-        <p class="status-orange hidden flex gap-x-4 items-center">
-          <span class="inline-block h-6 w-6 grow-0 text-amber-500 %>">
-            <%= render "icons/alert-octagon" %>
-          </span>
-          <span>
-            The Kosmos relay is missing from your relay list
-          </span>
-        </p>
-        <p class="status-red hidden flex gap-x-4 items-center">
-          <span class="inline-block h-6 w-6 grow-0 text-amber-500 %>">
-            <%= render "icons/alert-octagon" %>
-          </span>
-          <span>
-            We could not find a relay list for your public key
-          </span>
-        </p>
-      </div>
-      <ul data-settings--nostr-pubkey-target="relayList">
-      </ul>
-    </section>
   <% end %>
 </div>

app/views/settings/_nostr_user_relays.html.erb

@@ -0,0 +1,15 @@
+<%= turbo_frame_tag "nostr_user_metadata" do %>
+  <section>
+    <h3>Profile</h3>
+    <%= render Settings::NostrProfileStatusComponent.new(
+      profile_event: @profile,
+      user_address: current_user.address
+    ) %>
+  </section>
+  <section>
+    <h3>Relays</h3>
+    <%= render Settings::NostrRelayStatusComponent.new(
+      relay_urls: @relay_urls
+    ) %>
+  </section>
+<% end %>

config/routes.rb

@@ -65,6 +65,7 @@ Rails.application.routes.draw do
       post 'reset_email_password'
       post 'set_nostr_pubkey'
       delete 'nostr_pubkey', to: 'settings#remove_nostr_pubkey'
+      get 'fetch_nostr_user_metadata', as: 'nostr_user_metadata'
     end
   end