discourse/spec/lib/svg_sprite/svg_sprite_spec.rb

# frozen_string_literal: true

RSpec.describe SvgSprite do
  fab!(:theme)

  before do
    SvgSprite.clear_plugin_svg_sprite_cache!
    SvgSprite.expire_cache
  end

  it "can generate a bundle" do
    bundle = SvgSprite.bundle
    expect(bundle).to match(/heart/)
    expect(bundle).to match(/angles-down/)
  end

  it "can generate paths" do
    version = SvgSprite.version # Icons won't change for this test
    expect(SvgSprite.path).to eq("/svg-sprite/#{Discourse.current_hostname}/svg--#{version}.js")
    expect(SvgSprite.path(1)).to eq("/svg-sprite/#{Discourse.current_hostname}/svg-1-#{version}.js")

    # Safe mode
    expect(SvgSprite.path(nil)).to eq(
      "/svg-sprite/#{Discourse.current_hostname}/svg--#{version}.js",
    )
  end

  it "can search for a specific FA icon" do
    expect(SvgSprite.search("poo-storm")).to match(/poo-storm/)
    expect(SvgSprite.search("this-is-not-an-icon")).to eq(false)
  end

  it "can get a raw SVG for an icon" do
    expect(SvgSprite.raw_svg("heart")).to match(/svg.*svg/) # SVG inside SVG
    expect(SvgSprite.raw_svg("this-is-not-an-icon")).to eq("")
  end

  it "can get a consistent version string" do
    version1 = SvgSprite.version
    version2 = SvgSprite.version

    expect(version1).to eq(version2)
  end

  it "version string changes" do
    version1 = SvgSprite.version
    Fabricate(:badge, name: "Custom Icon Badge", icon: "fa-gamepad")
    version2 = SvgSprite.version

    expect(version1).not_to eq(version2)
  end

  it "version should be based on bundled output, not requested icons" do
    fname = "custom-theme-icon-sprite.svg"
    upload = UploadCreator.new(file_from_fixtures(fname), fname, for_theme: true).create_for(-1)

    version1 = SvgSprite.version(theme.id)
    bundle1 = SvgSprite.bundle(theme.id)

    SiteSetting.svg_icon_subset = "my-custom-theme-icon"

    version2 = SvgSprite.version(theme.id)
    bundle2 = SvgSprite.bundle(theme.id)

    # The contents of the bundle should not change, because the icon does not actually exist
    expect(bundle1).to eq(bundle2)
    # Therefore the version hash should not change
    expect(version1).to eq(version2)

    # Now add the icon to the theme
    theme.set_field(
      target: :common,
      name: SvgSprite.theme_sprite_variable_name,
      upload_id: upload.id,
      type: :theme_upload_var,
    )
    theme.save!

    version3 = SvgSprite.version(theme.id)
    bundle3 = SvgSprite.bundle(theme.id)

    # The version/bundle should be updated
    expect(bundle3).not_to match(bundle2)
    expect(version3).not_to match(version2)
    expect(bundle3).to match(/my-custom-theme-icon/)
  end

  it "strips whitespace when processing icons" do
    Fabricate(:badge, name: "Custom Icon Badge", icon: "  fab fa-facebook-messenger  ")
    expect(SvgSprite.all_icons).to include("fab-facebook-messenger")
    expect(SvgSprite.all_icons).not_to include("  fab-facebook-messenger  ")
  end

  it "includes Font Awesome 5 icons from badges" do
    Fabricate(:badge, name: "Custom Icon Badge", icon: "far fa-building")
    expect(SvgSprite.all_icons).to include("far-building")
  end

  it "includes icons defined in theme settings" do
    # Works for default settings:
    theme.set_field(target: :settings, name: :yaml, value: "custom_icon: dragon")
    theme.save!
    expect(SvgSprite.all_icons(theme.id)).to include("dragon")

    # Automatically purges cache when default changes:
    theme.set_field(target: :settings, name: :yaml, value: "custom_icon: gamepad")
    theme.save!
    expect(SvgSprite.all_icons(theme.id)).to include("gamepad")

    # Works when applying override
    theme.update_setting(:custom_icon, "gas-pump")
    theme.save!
    expect(SvgSprite.all_icons(theme.id)).to include("gas-pump")

    # Works when changing override
    theme.update_setting(:custom_icon, "gamepad")
    theme.save!
    expect(SvgSprite.all_icons(theme.id)).to include("gamepad")
    expect(SvgSprite.all_icons(theme.id)).not_to include("gas-pump")

    # FA5 syntax
    theme.update_setting(:custom_icon, "fab fa-bandcamp")
    theme.save!
    expect(SvgSprite.all_icons(theme.id)).to include("fab-bandcamp")

    # Internal Discourse syntax + multiple icons
    theme.update_setting(:custom_icon, "fab-android|dragon")
    theme.save!
    expect(SvgSprite.all_icons(theme.id)).to include("fab-android")
    expect(SvgSprite.all_icons(theme.id)).to include("dragon")

    # Check themes don't leak into non-theme sprite sheet
    expect(SvgSprite.all_icons).not_to include("dragon")

    # Check components are included
    theme.update(component: true)
    theme.save!
    parent_theme = Fabricate(:theme)
    parent_theme.add_relative_theme!(:child, theme)
    expect(SvgSprite.all_icons(parent_theme.id)).to include("dragon")
  end

  it "includes icons defined in theme modifiers" do
    child_theme = Fabricate(:theme, component: true)
    theme.add_relative_theme!(:child, child_theme)

    expect(SvgSprite.all_icons(theme.id)).not_to include("dragon")

    theme.theme_modifier_set.svg_icons = ["dragon"]
    theme.save!

    child_theme.theme_modifier_set.svg_icons = ["fly"]
    child_theme.save!

    icons = SvgSprite.all_icons(theme.id)

    expect(icons).to include("dragon")
    expect(icons).to include("fly")
  end

  describe "s3" do
    let(:upload_s3) { Fabricate(:upload_s3) }

    before do
      setup_s3
      body = <<~XML
        <?xml version="1.0" encoding="UTF-8"?>
        <svg xmlns="http://www.w3.org/2000/svg" style="display: none;">
          <symbol id="my-custom-theme-icon" viewBox="0 0 496 512">
            <path d="M248 8C111.03 8 0 119.03 0 256s111.03 248 248 248 248-111.03 248-248S384.97 8 248 8zm0 376c-17.67 0-32-14.33-32-32s14.33-32 32-32 32 14.33 32 32-14.33 32-32 32zm0-128c-53.02 0-96 42.98-96 96s42.98 96 96 96c-106.04 0-192-85.96-192-192S141.96 64 248 64c53.02 0 96 42.98 96 96s-42.98 96-96 96zm0-128c-17.67 0-32 14.33-32 32s14.33 32 32 32 32-14.33 32-32-14.33-32-32-32z"></path>
          </symbol>
        </svg>
      XML
      stub_request(:get, upload_s3.url).to_return(status: 200, body: body)
    end

    it "includes svg sprites in themes stored in s3" do
      theme.set_field(
        target: :common,
        name: SvgSprite.theme_sprite_variable_name,
        upload_id: upload_s3.id,
        type: :theme_upload_var,
      )
      theme.save!

      sprite_files = SvgSprite.custom_svgs(theme.id).values.join("|")
      expect(sprite_files).to match(/my-custom-theme-icon/)

      SvgSprite.bundle(theme.id)
      expect(SvgSprite.cache.hash.keys).to include("theme_svg_sprites_#{theme.id}")

      external_copy = Discourse.store.download(upload_s3)
      File.delete external_copy.try(:path)

      SvgSprite.bundle(theme.id)
      # after a temp file is missing, bundling still works
      expect(SvgSprite.cache.hash.keys).to include("theme_svg_sprites_#{theme.id}")
    end
  end

  it "includes icons from SiteSettings" do
    SiteSetting.svg_icon_subset = "blender|compass-drafting|fab-bandcamp"

    all_icons = SvgSprite.all_icons
    expect(all_icons).to include("blender")
    expect(all_icons).to include("compass-drafting")
    expect(all_icons).to include("fab-bandcamp")

    SiteSetting.svg_icon_subset = nil
    SvgSprite.expire_cache
    expect(SvgSprite.all_icons).not_to include("compass-drafting")

    # does not fail on non-string setting
    SiteSetting.svg_icon_subset = false
    SvgSprite.expire_cache
    expect(SvgSprite.all_icons).to be_truthy
  end

  it "includes icons from plugin registry" do
    DiscoursePluginRegistry.register_svg_icon "blender"
    DiscoursePluginRegistry.register_svg_icon "fab fa-bandcamp"

    expect(SvgSprite.all_icons).to include("blender")
    expect(SvgSprite.all_icons).to include("fab-bandcamp")
  end

  it "includes Font Awesome icon from groups" do
    _group = Fabricate(:group, flair_icon: "far-building")
    expect(SvgSprite.bundle).to match(/far-building/)
  end

  describe "#custom_svgs" do
    it "is empty by default" do
      expect(SvgSprite.custom_svgs(nil)).to be_empty
      expect(SvgSprite.bundle).not_to be_empty
    end

    context "with a plugin" do
      let :plugin1 do
        plugin1 = plugin_from_fixtures("my_plugin")
        plugin1
      end

      before do
        Discourse.plugins << plugin1
        plugin1.activate!
      end

      after do
        Discourse.plugins.delete plugin1
        DiscoursePluginRegistry.reset!
      end

      it "includes custom icons from plugins" do
        expect(SvgSprite.custom_svgs(nil).size).to eq(1)
        expect(SvgSprite.bundle).to match(/custom-icon/)
      end
    end

    it "includes custom icons in a theme" do
      fname = "custom-theme-icon-sprite.svg"

      upload = UploadCreator.new(file_from_fixtures(fname), fname, for_theme: true).create_for(-1)

      theme.set_field(
        target: :common,
        name: SvgSprite.theme_sprite_variable_name,
        upload_id: upload.id,
        type: :theme_upload_var,
      )
      theme.save!

      expect(Upload.exists?(id: upload.id)).to eq(true)
      expect(SvgSprite.bundle(theme.id)).to match(/my-custom-theme-icon/)
    end

    it "includes custom icons in a theme and an attached theme component" do
      theme_component = Fabricate(:theme, component: true)
      theme.add_relative_theme!(:child, theme_component)

      fname1 = "custom-theme-icon-sprite.svg"
      fname2 = "custom-theme-component-icon-sprite.svg"

      [[theme, fname1], [theme_component, fname2]].each do |t, fname|
        upload = UploadCreator.new(file_from_fixtures(fname), fname, for_theme: true).create_for(-1)
        expect(Upload.exists?(id: upload.id)).to eq(true)

        t.set_field(
          target: :common,
          name: SvgSprite.theme_sprite_variable_name,
          upload_id: upload.id,
          type: :theme_upload_var,
        )
        t.save!
      end

      expect(SvgSprite.bundle(theme.id)).to match(/my-custom-theme-icon/)
      expect(SvgSprite.bundle(theme.id)).to match(/my-other-custom-theme-icon/)
    end

    it "does not fail on bad XML in custom icon sprite" do
      fname = "bad-xml-icon-sprite.svg"

      upload = UploadCreator.new(file_from_fixtures(fname), fname, for_theme: true).create_for(-1)

      theme.set_field(
        target: :common,
        name: SvgSprite.theme_sprite_variable_name,
        upload_id: upload.id,
        type: :theme_upload_var,
      )
      theme.save!

      expect(Upload.exists?(id: upload.id)).to eq(true)
      expect(SvgSprite.bundle(theme.id)).to match(/arrow-down/)
    end

    it "includes custom icons in a child theme" do
      fname = "custom-theme-icon-sprite.svg"
      child_theme = Fabricate(:theme, component: true)
      theme.add_relative_theme!(:child, child_theme)

      upload = UploadCreator.new(file_from_fixtures(fname), fname, for_theme: true).create_for(-1)

      child_theme.set_field(
        target: :common,
        name: SvgSprite.theme_sprite_variable_name,
        upload_id: upload.id,
        type: :theme_upload_var,
      )
      child_theme.save!

      expect(Upload.exists?(id: upload.id)).to eq(true)
      expect(SvgSprite.bundle(theme.id)).to match(/my-custom-theme-icon/)
    end

    it "does not include theme icons if custom icon sprite is too large" do
      fname = "theme-icon-sprite.svg"
      symbols = ""

      # should exceed MAX_THEME_SPRITE_SIZE
      3500.times do |i|
        id = "icon-id-#{i}"
        path =
          "M#{rand(1..100)} 2.18-2.087.277-4.216.42-6.378.42s-4.291-.143-6.378-.42c-1.085-.144-1.872-1.086-1.872-2.18v-4.25m16.5 0a2.18 2.18 0 00.75-1.661V8.706c0-1.081-.768-2.015-1.837-2.175a48.114 48.114 0 00-3.413-.387m4.5 8.006c-.194.165-.42.295-.673.38A23.978 23.978 0 0112 15.75c-2.648 0-5.195-.429-7.577-1.22a2.016 2.016 0 01-.673-.38m0 0A2.18 2.18 0 013 12.489V8.706c0-1.081.768-2.015 1.837-2.175a48.111 48.111 0 013.413-.387m7.5 0V5.25A2.25 2.25 0 0013.5 3h-3a2.25 .008z"
        symbols += "<symbol id='#{id}' viewBox='0 0 100 100'><path d='#{path}'/></symbol>\n"
      end

      contents =
        "<?xml version='1.0' encoding='UTF-8'?><svg><symbol id='customthemeicon' viewBox='0 0 100 100'><path d='M0 0h1ssss00v100H0z'/></symbol>#{symbols}</svg>"

      child_theme = Fabricate(:theme, component: true)
      theme.add_relative_theme!(:child, child_theme)

      upload =
        UploadCreator.new(file_from_contents(contents, fname), fname, for_theme: true).create_for(
          -1,
        )

      child_theme.set_field(
        target: :common,
        name: SvgSprite.theme_sprite_variable_name,
        upload_id: upload.id,
        type: :theme_upload_var,
      )
      child_theme.save!

      expect(Upload.exists?(id: upload.id)).to eq(true)
      expect(SvgSprite.bundle(theme.id)).not_to match(/customthemeicon/)
    end
  end
end