Print open home-gitops issues on the Epson receipt printer

Reads a Gitea API token from .gitea_token (gitignored, not present yet --
needs creating on the server), fetches open issues via the API, and prints
number/title/labels per issue with a running total. Button on the home page.

.gitignore

@@ -1,4 +1,5 @@
 .session_secret
+.gitea_token
 public/files/*
 !public/files/.gitkeep
 data/labels/*

app.rb

@@ -3,6 +3,7 @@ require 'sinatra'
 require "sinatra/reloader"
 require 'tmpdir'
 require 'net/http'
+require 'json'
 require_relative 'lib/receipt_builder'
 require_relative 'lib/label_repository'
 
@@ -154,6 +155,45 @@ helpers do
     receipt.print!(PRINTER_DEVICE_EPSON)
   end
 
+  GITEA_TOKEN_FILE = File.join(File.dirname(__FILE__), '.gitea_token')
+
+  def fetch_open_issues(repo)
+    token = File.read(GITEA_TOKEN_FILE).strip
+    uri = URI("https://git.priesol.net/api/v1/repos/randy/#{repo}/issues?state=open&type=issues&limit=50")
+    req = Net::HTTP::Get.new(uri)
+    req['Authorization'] = "token #{token}"
+    res = Net::HTTP.start(uri.host, uri.port, use_ssl: true) { |http| http.request(req) }
+    raise "Gitea API returned #{res.code}" unless res.is_a?(Net::HTTPSuccess)
+
+    JSON.parse(res.body)
+  end
+
+  # Prints a receipt-style summary of a repo's open issues -- number, title,
+  # labels, one separator per issue, total at the end.
+  def print_issues(repo)
+    issues = fetch_open_issues(repo).sort_by { |i| i['number'] }
+
+    receipt = ReceiptBuilder.new
+    receipt.align(:center).bold.text("Open issues: #{repo}\n").bold(false)
+    receipt.text("#{Time.now.strftime('%Y-%m-%d %H:%M')}\n")
+    receipt.align(:left).text(('-' * 32) + "\n")
+
+    if issues.empty?
+      receipt.text("(no open issues)\n")
+    else
+      issues.each do |issue|
+        receipt.bold.text("##{issue['number']} #{issue['title']}\n").bold(false)
+        labels = issue['labels'].map { |l| l['name'] }.join(', ')
+        receipt.text("#{labels}\n") unless labels.empty?
+        receipt.text(('-' * 32) + "\n")
+      end
+    end
+
+    receipt.text("Total: #{issues.size}\n")
+    receipt.feed(3).cut
+    receipt.print!(PRINTER_DEVICE_EPSON)
+  end
+
   # Renders ZPL to a PNG via Labelary's public API for an inline preview.
   # Fixed at the Datamax label size (4x6in @ 8dpmm ~= 203dpi) -- good enough
   # for a thumbnail, not meant to be exact for other sizes.
@@ -213,6 +253,16 @@ get '/' do
   erb :index
 end
 
+post '/issues/print' do
+  begin
+    print_issues('home-gitops')
+    flash 'Open issues sent to printer', 'success'
+  rescue => e
+    flash "Failed to print issues (#{e.message})", 'danger'
+  end
+  redirect '/'
+end
+
 get '/upload' do
   erb :upload
 end

views/index.erb

@@ -9,3 +9,13 @@
     </ul>
   </div>
 </div>
+
+<div class="card mt-3">
+  <div class="card-body">
+    <h5 class="card-title">home-gitops open issues</h5>
+    <p class="card-text">Print a receipt-style summary of currently open issues.</p>
+    <form action="/issues/print" method="POST">
+      <button class="btn btn-secondary" type="submit">Print open issues</button>
+    </form>
+  </div>
+</div>