Add project http fetch statistics API

The API get projects/:id/traffic/fetches allows user with write
access to the repository to get the number of clones for the
last 30 days.

3 files changed, 36 insertions, 0 deletions

diff --git a/lib/api/api.rb b/lib/api/api.rb
index 4dd1b459554..bf8ddba6f0d 100644
--- a/lib/api/api.rb
+++ b/lib/api/api.rb
@@ -141,6 +141,7 @@ module API
     mount ::API::Projects
     mount ::API::ProjectSnapshots
     mount ::API::ProjectSnippets
+    mount ::API::ProjectStatistics
     mount ::API::ProjectTemplates
     mount ::API::ProtectedBranches
     mount ::API::ProtectedTags
diff --git a/lib/api/entities.rb b/lib/api/entities.rb
index 9199f898ea0..c13cb389947 100644
--- a/lib/api/entities.rb
+++ b/lib/api/entities.rb
@@ -300,6 +300,18 @@ module API
       expose :build_artifacts_size, as: :job_artifacts_size
     end
 
+    class ProjectDailyFetches < Grape::Entity
+      expose :fetch_count, as: :count
+      expose :date
+    end
+
+    class ProjectDailyStatistics < Grape::Entity
+      expose :fetches do
+        expose :total_fetch_count, as: :total
+        expose :fetches, as: :days, using: ProjectDailyFetches
+      end
+    end
+
     class Member < Grape::Entity
       expose :user, merge: true, using: UserBasic
       expose :access_level
diff --git a/lib/api/project_statistics.rb b/lib/api/project_statistics.rb
new file mode 100644
index 00000000000..2f73785f72d
--- /dev/null
+++ b/lib/api/project_statistics.rb
@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+module API
+  class ProjectStatistics < Grape::API
+    before do
+      authenticate!
+      not_found! unless user_project.daily_statistics_enabled?
+      authorize! :daily_statistics, user_project
+    end
+
+    params do
+      requires :id, type: String, desc: 'The ID of a project'
+    end
+    resource :projects, requirements: API::NAMESPACE_OR_PROJECT_REQUIREMENTS do
+      desc 'Get the list of project fetch statistics for the last 30 days'
+      get ":id/statistics" do
+        statistic_finder = ::Projects::DailyStatisticsFinder.new(user_project)
+
+        present statistic_finder, with: Entities::ProjectDailyStatistics
+      end
+    end
+  end
+end