Improve pipelines design

1 files changed, 38 insertions, 0 deletions

diff --git a/app/finders/pipelines_finder.rb b/app/finders/pipelines_finder.rb
new file mode 100644
index 00000000000..c19a795d467
--- /dev/null
+++ b/app/finders/pipelines_finder.rb
@@ -0,0 +1,38 @@
+class PipelinesFinder
+  attr_reader :project
+
+  def initialize(project)
+    @project = project
+  end
+
+  def execute(pipelines, scope)
+    case scope
+    when 'running'
+      pipelines.running_or_pending
+    when 'branches'
+      from_ids(pipelines, ids_for_ref(pipelines, branches))
+    when 'tags'
+      from_ids(pipelines, ids_for_ref(pipelines, tags))
+    else
+      pipelines
+    end
+  end
+
+  private
+
+  def ids_for_ref(pipelines, refs)
+    pipelines.where(ref: refs).group(:ref).select('max(id)')
+  end
+
+  def from_ids(pipelines, ids)
+    pipelines.unscoped.where(id: ids)
+  end
+
+  def branches
+    project.repository.branches.map(&:name)
+  end
+
+  def tags
+    project.repository.tags.map(&:name)
+  end
+end