3 files changed, 111 insertions, 0 deletions
diff --git a/lib/gitlab/ci/badge/release/latest_release.rb b/lib/gitlab/ci/badge/release/latest_release.rb
new file mode 100644
index 00000000000..e73bb2a912a
--- /dev/null
+++ b/lib/gitlab/ci/badge/release/latest_release.rb
@@ -0,0 +1,42 @@
+# frozen_string_literal: true
+
+module Gitlab::Ci
+  module Badge
+    module Release
+      class LatestRelease < Badge::Base
+        attr_reader :project, :release, :customization
+
+        def initialize(project, current_user, opts: {})
+          @project = project
+          @customization = {
+            key_width: opts[:key_width] ? opts[:key_width].to_i : nil,
+            key_text: opts[:key_text]
+          }
+
+          # In the future, we should support `order_by=semver` for showing the
+          # latest release based on Semantic Versioning.
+          @release = ::ReleasesFinder.new(
+            project,
+            current_user,
+            order_by: opts[:order_by]).execute.first
+        end
+
+        def entity
+          'Latest Release'
+        end
+
+        def tag
+          @release&.tag
+        end
+
+        def metadata
+          @metadata ||= Release::Metadata.new(self)
+        end
+
+        def template
+          @template ||= Release::Template.new(self)
+        end
+      end
+    end
+  end
+end
diff --git a/lib/gitlab/ci/badge/release/metadata.rb b/lib/gitlab/ci/badge/release/metadata.rb
new file mode 100644
index 00000000000..e02959b5741
--- /dev/null
+++ b/lib/gitlab/ci/badge/release/metadata.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+module Gitlab::Ci
+  module Badge
+    module Release
+      class Metadata < Badge::Metadata
+        def initialize(badge)
+          @project = badge.project
+        end
+
+        def title
+          'Latest Release'
+        end
+
+        def image_url
+          release_project_badges_url(@project, format: :svg)
+        end
+
+        def link_url
+          project_releases_url(@project)
+        end
+      end
+    end
+  end
+end
diff --git a/lib/gitlab/ci/badge/release/template.rb b/lib/gitlab/ci/badge/release/template.rb
new file mode 100644
index 00000000000..65bff4371cf
--- /dev/null
+++ b/lib/gitlab/ci/badge/release/template.rb
@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+module Gitlab::Ci
+  module Badge
+    module Release
+      # Template object will be passed to badge.svg.erb template.
+      class Template < Badge::Template
+        STATUS_COLOR = {
+          latest: '#3076af',
+          none: '#e05d44'
+        }.freeze
+        KEY_WIDTH_DEFAULT = 90
+        VALUE_WIDTH_DEFAULT = 54
+
+        def initialize(badge)
+          @entity = badge.entity
+          @tag = badge.tag || "none"
+          @key_width = badge.customization.dig(:key_width)
+          @key_text = badge.customization.dig(:key_text)
+        end
+
+        def key_text
+          @key_text || @entity.to_s
+        end
+
+        def key_width
+          @key_width || KEY_WIDTH_DEFAULT
+        end
+
+        def value_text
+          @tag.to_s
+        end
+
+        def value_width
+          VALUE_WIDTH_DEFAULT
+        end
+
+        def value_color
+          STATUS_COLOR[@tag.to_sym] || STATUS_COLOR[:latest]
+        end
+      end
+    end
+  end
+end