bingo: add, delete and reorder datacenters from admin

The card was fixed to the 25 seeded rows, so a new site such as
IXcellerate MOS7 (34 MW, under construction) could only be shoehorned in
by overwriting an existing row. Add create and delete (cascading to
incidents), make position an insert that shifts the rest, and keep
positions dense. More than 25 rows are allowed: the card shows the first
25 and the rest wait in reserve. "Sort by MW" re-ranks by the parsed
power figure, unknown last.

Assisted-by: Claude:opus-5

test/bingo_test.rb

@@ -46,6 +46,7 @@ class BingoTest < Minitest::Test
     assert_includes last_response.body, 'Moscow'
     get '/uk'
     assert_includes last_response.body, 'Бінго'
+    assert_includes last_response.body, '<a href="https://asxp.io">asxp.io</a>'
     get '/xx'
     assert_equal 404, last_response.status
   end
@@ -162,6 +163,79 @@ class BingoTest < Minitest::Test
     assert_equal 2027, @dcs[0].year
   end
 
+  def admin_token(path = '/admin/bingo')
+    get path, {}, admin_env
+    last_response.body[/name="authenticity_token" value="([^"]+)"/, 1]
+  end
+
+  def dc_params(extra = {})
+    { name_ru: 'IXcellerate MOS7', city_ru: 'Москва', operator: 'IXcellerate', mw: '34', status: 'building' }.merge(extra)
+  end
+
+  def test_mw_value
+    assert_equal 64.0, Bingo.mw_value('64')
+    assert_equal 30.0, Bingo.mw_value('25–30')
+    assert_equal 13.7, Bingo.mw_value('13,7')
+    assert_equal 40.0, Bingo.mw_value('>40')
+    assert_nil Bingo.mw_value('')
+  end
+
+  def test_admin_adds_datacenter_at_position
+    @app = AsxpioWeb
+    token = admin_token('/admin/bingo/dc/new')
+    post '/admin/bingo/dc', dc_params(authenticity_token: token, slug: 'ix-mos7', position: '9'), admin_env
+    assert_equal 302, last_response.status, last_response.body
+    mos7 = Bingo::Datacenter[slug: 'ix-mos7']
+    assert_equal 9, mos7.position
+    assert_equal 10, @dcs[8].refresh.position          # old #9 shifted down
+    assert_equal 26, @dcs[24].refresh.position         # old #25 now in reserve
+    assert_equal (1..26).to_a, Bingo::Datacenter.order(:position).select_map(:position)
+
+    board = Bingo::Board.load
+    assert_equal 25, board.cells.size
+    refute_includes board.cells.map(&:slug), 'dc-25'
+    assert_includes board.cells.map(&:slug), 'ix-mos7'
+  end
+
+  def test_admin_rejects_bad_or_duplicate_slug
+    @app = AsxpioWeb
+    token = admin_token('/admin/bingo/dc/new')
+    post '/admin/bingo/dc', dc_params(authenticity_token: token, slug: 'Bad Slug'), admin_env
+    assert_equal 422, last_response.status
+    post '/admin/bingo/dc', dc_params(authenticity_token: token, slug: 'dc-1'), admin_env
+    assert_equal 422, last_response.status
+    assert_equal 25, Bingo::Datacenter.count
+  end
+
+  def test_admin_moves_datacenter
+    @app = AsxpioWeb
+    token = admin_token("/admin/bingo/dc/#{@dcs[24].id}")
+    post "/admin/bingo/dc/#{@dcs[24].id}", dc_params(authenticity_token: token, name_ru: 'ЦОД 25', position: '1'), admin_env
+    assert_equal 1, @dcs[24].refresh.position
+    assert_equal 2, @dcs[0].refresh.position
+    assert_equal (1..25).to_a, Bingo::Datacenter.order(:position).select_map(:position)
+  end
+
+  def test_admin_deletes_datacenter_with_incidents
+    @app = AsxpioWeb
+    hit!(4)
+    token = admin_token("/admin/bingo/dc/#{@dcs[4].id}")
+    post "/admin/bingo/dc/#{@dcs[4].id}/delete", { authenticity_token: token }, admin_env
+    assert_equal 302, last_response.status
+    assert_nil Bingo::Datacenter[@dcs[4].id]
+    assert_equal 0, Bingo::Incident.count
+    assert_equal (1..24).to_a, Bingo::Datacenter.order(:position).select_map(:position)
+  end
+
+  def test_sort_by_mw
+    @dcs[0].update(mw: '')    # unknown → last
+    @dcs[1].update(mw: '25–30')
+    Bingo.sort_by_mw!
+    order = Bingo::Datacenter.order(:position).select_map(:slug)
+    assert_equal %w[dc-2 dc-25 dc-24], order.first(3) # "25–30" ranks as 30
+    assert_equal 'dc-1', order.last
+  end
+
   def test_upload_photo_via_admin
     @app = AsxpioWeb
     get "/admin/bingo/dc/#{@dcs[0].id}", {}, admin_env