Cleanup the use of duration and optimize some queries

app/helpers/time_helper.rb

@@ -15,25 +15,9 @@ module TimeHelper
     "#{from.to_s(:short)} - #{to.to_s(:short)}"
   end
-  def duration_in_numbers(finished_at, started_at)
-    interval = interval_in_seconds(started_at, finished_at)
-    duration_in_numbers_from_interval(interval)
-  end
-
-  def duration_in_numbers_from_interval(interval)
-    time_format = interval < 1.hour ? "%M:%S" : "%H:%M:%S"
-
-    Time.at(interval).utc.strftime(time_format)
-  end
-
-  private
-
-  def interval_in_seconds(started_at, finished_at = nil)
-    if started_at && finished_at
-      finished_at.to_i - started_at.to_i
-    elsif started_at
-      Time.now.to_i - started_at.to_i
-    end
+  def duration_in_numbers(duration)
+    time_format = duration < 1.hour ? "%M:%S" : "%H:%M:%S"
+    Time.at(duration).utc.strftime(time_format)
   end
 end

app/models/ci/pipeline.rb

@@ -34,6 +34,10 @@ module Ci
       CommitStatus.where(pipeline: pluck(:id)).stages
     end
+    def self.duration
+      where.not(duration: nil).pluck(:duration).inject(0, &:+)
+    end
+
     def project_id
       project.id
     end
@@ -213,10 +217,6 @@ module Ci
       ]
     end
-    def wall_clock_duration
-      finished_at.to_i - started_at.to_i if finished_at && started_at
-    end
-
     private
     def build_builds_for_stages(stages, user, status, trigger_request)
@@ -240,7 +240,7 @@ module Ci
                     end
       self.started_at = statuses.started_at
       self.finished_at = statuses.finished_at
-      self.duration = statuses.latest.duration
+      self.duration = calculate_duration.to_i
       save
     end

app/models/commit_status.rb

@@ -21,6 +21,7 @@ class CommitStatus < ActiveRecord::Base
     where(id: max_id.group(:name, :commit_id))
   end
+
   scope :retried, -> { where.not(id: latest) }
   scope :ordered, -> { order(:name) }
   scope :ignored, -> { where(allow_failure: true, status: [:failed, :canceled]) }
@@ -83,18 +84,17 @@ class CommitStatus < ActiveRecord::Base
     end
   end
+  def self.duration
+    select(:started_at, :finished_at).all.
+      map(&:duration).compact.inject(0, &:+)
+  end
+
   def ignored?
     allow_failure? && (failed? || canceled?)
   end
   def duration
-    duration =
-      if started_at && finished_at
-        finished_at - started_at
-      elsif started_at
-        Time.now - started_at
-      end
-    duration
+    calculate_duration
   end
   def stuck?

app/models/concerns/statuseable.rb

@@ -31,11 +31,6 @@ module Statuseable
       all.pluck(self.status_sql).first
     end
-    def duration
-      duration_array = all.map(&:duration).compact
-      duration_array.reduce(:+)
-    end
-
     def started_at
       all.minimum(:started_at)
     end
@@ -78,4 +73,14 @@ module Statuseable
   def complete?
     canceled? || success? || failed?
   end
+
+  private
+
+  def calculate_duration
+    if started_at && finished_at
+      finished_at - started_at
+    elsif started_at
+      Time.now - started_at
+    end
+  end
 end

app/views/admin/builds/_build.html.haml

@@ -51,7 +51,7 @@
     - if build.duration
       %p.duration
         = custom_icon("icon_timer")
-        = duration_in_numbers(build.finished_at, build.started_at)
+        = duration_in_numbers(build.duration)
     - if build.finished_at
       %p.finished-at

app/views/projects/ci/builds/_build.html.haml

@@ -63,7 +63,7 @@
     - if build.duration
       %p.duration
         = custom_icon("icon_timer")
-        = duration_in_numbers(build.finished_at, build.started_at)
+        = duration_in_numbers(build.duration)
     - if build.finished_at
       %p.finished-at
         = icon("calendar")

app/views/projects/ci/pipelines/_pipeline.html.haml

@@ -46,10 +46,10 @@
             \-
   %td
-    - if pipeline.wall_clock_duration
+    - if pipeline.duration
       %p.duration
         = custom_icon("icon_timer")
-        = duration_in_numbers_from_interval(pipeline.wall_clock_duration)
+        = duration_in_numbers(pipeline.duration)
     - if pipeline.finished_at
       %p.finished-at
         = icon("calendar")

app/views/projects/pipelines/_info.html.haml

@@ -7,9 +7,9 @@
   - if @pipeline.ref
     for
     = link_to @pipeline.ref, namespace_project_commits_path(@project.namespace, @project, @pipeline.ref), class: "monospace"
-  - if @pipeline.wall_clock_duration
+  - if @pipeline.duration
     in
-    = time_interval_in_words(@pipeline.wall_clock_duration)
+    = time_interval_in_words(@pipeline.duration)
   .pull-right
     = link_to namespace_project_pipeline_path(@project.namespace, @project, @pipeline), class: "ci-status ci-#{@pipeline.status}" do

spec/helpers/time_helper_spec.rb

@@ -19,16 +19,16 @@ describe TimeHelper do
   describe "#duration_in_numbers" do
     it "returns minutes and seconds" do
-      duration_in_numbers = {
-        [100, 0] => "01:40",
-        [121, 0] => "02:01",
-        [3721, 0] => "01:02:01",
-        [0, 0] => "00:00",
-        [nil, Time.now.to_i - 42] => "00:42"
+      durations_and_expectations = {
+        100 => "01:40",
+        121 => "02:01",
+        3721 => "01:02:01",
+        0 => "00:00",
+        42 => "00:42"
       }
-      duration_in_numbers.each do |interval, expectation|
-        expect(duration_in_numbers(*interval)).to eq(expectation)
+      durations_and_expectations.each do |duration, expectation|
+        expect(duration_in_numbers(duration)).to eq(expectation)
       end
     end
   end