FEATURE: adds trust_level_growth report (#8878)

app/assets/javascripts/admin/components/admin-report-stacked-chart.js.es6

@@ -101,7 +101,6 @@ export default Component.extend({
               moment(tooltipItem[0].xLabel, "YYYY-MM-DD").format("LL")
           }
         },
-        legend: { display: false },
         layout: {
           padding: {
             left: 0,

app/models/report.rb

@@ -380,3 +380,4 @@ require_relative "reports/time_to_first_response"
 require_relative "reports/topics_with_no_response"
 require_relative "reports/emails"
 require_relative "reports/web_crawlers"
+require_relative "reports/trust_level_growth"

app/models/reports/trust_level_growth.rb

@@ -0,0 +1,78 @@
+# frozen_string_literal: true
+
+Report.add_report("trust_level_growth") do |report|
+  report.modes = [:stacked_chart]
+
+  filters = %w[
+    tl1_reached
+    tl2_reached
+    tl3_reached
+    tl4_reached
+  ]
+
+  sql = <<~SQL
+  SELECT
+    date(created_at),
+    (
+      count(*) filter (WHERE previous_value::integer < 1 AND new_value = '1')
+    )  as tl1_reached,
+    (
+      count(*) filter (WHERE previous_value::integer < 2 AND new_value = '2')
+    )  as tl2_reached,
+    (
+      count(*) filter (WHERE previous_value::integer < 3  AND new_value = '3')
+    )  as tl3_reached,
+    (
+      count(*) filter (WHERE previous_value::integer < 4  AND new_value = '4')
+    )  as tl4_reached
+  FROM user_histories
+  WHERE (
+    created_at >= '#{report.start_date}'
+    AND created_at <= '#{report.end_date}'
+  )
+  AND (
+    action = #{UserHistory.actions[:change_trust_level]}
+    OR action = #{UserHistory.actions[:auto_trust_level_change]}
+  )
+  GROUP BY date(created_at)
+  LIMIT #{report.limit || 250}
+  SQL
+
+  data = Hash[ filters.collect { |x| [x, []] } ]
+
+  builder = DB.build(sql)
+  builder.query.each do |row|
+    filters.each do |filter|
+      data[filter] << {
+        x: row.date.strftime("%Y-%m-%d"),
+        y: row.instance_variable_get("@#{filter}")
+      }
+    end
+  end
+
+  tertiary = ColorScheme.hex_for_name('tertiary') || '0088cc'
+  quaternary = ColorScheme.hex_for_name('quaternary') || 'e45735'
+
+  requests = filters.map do |filter|
+    color = report.rgba_color(quaternary)
+
+    if filter == "tl1_reached"
+      color = report.lighten_color(tertiary, 0.25)
+    end
+    if filter == "tl2_reached"
+      color = report.rgba_color(tertiary)
+    end
+    if filter == "tl3_reached"
+      color = report.lighten_color(quaternary, 0.25)
+    end
+
+    {
+      req: filter,
+      label: I18n.t("reports.trust_level_growth.xaxis.#{filter}"),
+      color: color,
+      data: data[filter]
+    }
+  end
+
+  report.data = requests
+end

config/locales/server.en.yml

@@ -1105,6 +1105,15 @@ en:
       xaxis: "Day"
       yaxis: "Number of new contributors"
       description: "Number of users who made their first post during this period."
+    trust_level_growth:
+      title: "Trust Level growth"
+      xaxis:
+        tl1_reached: "Reached TL1"
+        tl2_reached: "Reached TL2"
+        tl3_reached: "Reached TL3"
+        tl4_reached: "Reached TL4"
+      yaxis: "Day"
+      description: "Number of users who increased their Trust Level during this period."
     consolidated_page_views:
       title: "Consolidated Pageviews"
       xaxis:

spec/models/report_spec.rb

@@ -1193,4 +1193,43 @@ describe Report do
       end
     end
   end
+
+  describe "trust_level_growth" do
+    before do
+      freeze_time(Time.now.at_midnight)
+      Theme.clear_default!
+    end
+
+    let(:reports) { Report.find('trust_level_growth') }
+
+    context "with no data" do
+      it "works" do
+        reports.data.each do |report|
+          expect(report[:data]).to be_empty
+        end
+      end
+    end
+
+    context "with data" do
+      fab!(:gwen) { Fabricate(:user) }
+      fab!(:martin) { Fabricate(:user) }
+
+      before do
+        UserHistory.create(action: UserHistory.actions[:auto_trust_level_change], target_user_id: gwen.id, new_value: TrustLevel[2], previous_value: 1)
+        UserHistory.create(action: UserHistory.actions[:change_trust_level], target_user_id: martin.id, new_value: TrustLevel[4], previous_value: 0)
+      end
+
+      it "works" do
+        tl1_reached = reports.data.find { |r| r[:req] == "tl1_reached" }
+        tl2_reached = reports.data.find { |r| r[:req] == "tl2_reached" }
+        tl3_reached = reports.data.find { |r| r[:req] == "tl3_reached" }
+        tl4_reached = reports.data.find { |r| r[:req] == "tl4_reached" }
+
+        expect(tl1_reached[:data][0][:y]).to eql(0)
+        expect(tl2_reached[:data][0][:y]).to eql(1)
+        expect(tl3_reached[:data][0][:y]).to eql(0)
+        expect(tl4_reached[:data][0][:y]).to eql(1)
+      end
+    end
+  end
 end