Initial commit

.editorconfig

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+# top-most EditorConfig file
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+end_of_line = lf
+insert_final_newline = true
+charset = utf-8
+
+[*.rb]
+indent_style = spaces
+indent_size = 2

.gitignore

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+.bundle
+vendor

Gemfile

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+source 'https://rubygems.org'
+
+gem 'prawn'
+gem 'prawn-qrcode'
+gem 'prawn-svg'
+gem 'sinatra'
+gem 'color'
+gem 'excon'
+gem 'rmagick'
+gem 'json'

Gemfile.lock

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+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.5.0)
+      public_suffix (~> 2.0, >= 2.0.2)
+    chunky_png (1.3.8)
+    color (1.8)
+    css_parser (1.4.9)
+      addressable
+    excon (0.55.0)
+    json (1.8.3)
+    pdf-core (0.6.1)
+    prawn (2.1.0)
+      pdf-core (~> 0.6.1)
+      ttfunk (~> 1.4.0)
+    prawn-qrcode (0.3.0)
+      prawn (>= 1)
+      rqrcode (>= 0.4.1)
+    prawn-svg (0.26.0)
+      css_parser (~> 1.3)
+      prawn (>= 0.11.1, < 3)
+    public_suffix (2.0.5)
+    rack (1.6.5)
+    rack-protection (1.5.3)
+      rack
+    rmagick (2.16.0)
+    rqrcode (0.10.1)
+      chunky_png (~> 1.0)
+    sinatra (1.4.8)
+      rack (~> 1.5)
+      rack-protection (~> 1.4)
+      tilt (>= 1.3, < 3)
+    tilt (2.0.6)
+    ttfunk (1.4.0)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  color
+  excon
+  json
+  prawn
+  prawn-qrcode
+  prawn-svg
+  rmagick
+  sinatra
+
+BUNDLED WITH
+   1.11.2

main.rb

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+require 'rubygems'
+require 'sinatra'
+require 'prawn'
+require 'prawn/measurements'
+require 'prawn/qrcode'
+require 'prawn-svg'
+require 'color'
+require 'excon'
+require 'rmagick'
+require 'json'
+require 'zlib'
+
+include Prawn::Measurements
+
+module Excon
+  class Response
+    def json!()
+      puts body
+      JSON.parse(body)
+    end
+  end
+end
+
+BACKEND_URL = 'http://127.0.0.1:8000/api/1/'
+CODE_PREFIX = "HTTP://I/"
+
+def api(uri)
+  Excon.get(BACKEND_URL + uri + "/").json!
+end
+
+def render_identicode(data, id, extent)
+  pts = [[0, 0], [0, 1], [1, 1], [1, 0], [0, 0]]
+
+  4.times do |n|
+    color = Color::HSL.from_fraction((id % 6) / 6.0, 1.0, 0.3).html[1..6]
+    id /= 6
+
+    save_graphics_state do
+      soft_mask do
+        fill_color 'ffffff'
+        polygon = [pts[n], [0.5, 0.5], pts[n+1]].map{ |v| [v[0]*bounds.height, v[1]*bounds.height] }
+        fill_polygon(*(polygon))
+      end
+
+      print_qr_code data, stroke: false,
+                          extent: extent, foreground_color: color,
+                          pos: [bounds.left, bounds.top]
+    end
+  end
+
+  fill_color '000000'
+end
+
+def render_label(label)
+  margin = 2
+
+  label = api("labels/#{label}")
+
+  pdf = Prawn::Document.new(page_size: [89, 36].map { |x| mm2pt(x) },
+                            margin: mm2pt(margin)) do
+    font_families.update("DejaVuSans" => {
+      normal: "fonts/DejaVuSans.ttf",
+      italic: "fonts/DejaVuSans-Oblique.ttf",
+      bold: "fonts/DejaVuSans-Bold.ttf",
+      bold_italic: "fonts/DejaVuSans-BoldOblique.ttf"
+    })
+
+    font 'DejaVuSans'
+
+    svg IO.read("hsyrenka.svg"),
+      position: :right, vposition: :bottom,
+      height: 0.5*bounds.height
+
+    print_qr_code CODE_PREFIX + label['id'], stroke: false,
+      extent: mm2pt(36-2*margin), foreground_color: color,
+      pos: [bounds.left, bounds.top]
+
+    text_box label['item']['name'],
+      size: 30, align: :center, valign: :center,
+      inline_format: true,
+      width: bounds.width - bounds.height - 8,
+      height: bounds.height - 10,
+      at: [bounds.left+bounds.height, bounds.top - 5],
+      overflow: :shrink_to_fit
+  end
+
+  pdf.render
+end
+
+get '/api/1/preview/:label.pdf' do
+  headers["Content-Type"] = "application/pdf; charset=utf8"
+  render_label params["label"]
+end
+
+get '/api/1/preview/:label.png' do
+  headers["Content-Type"] = "image/png"
+  img = Magick::ImageList.new()
+  img = img.from_blob(render_label(params["label"])){ self.density = 200 }.first
+  img.format = 'png'
+  img.background_color = 'white'
+  img.to_blob
+end
+
+post '/api/1/print/:label' do
+  temp = Tempfile.new('labelmaker')
+  temp.write(render_label(params["label"]))
+  temp.close
+  system("lpr -P DYMO_LabelWriter_450 #{temp.path}")
+end