Channels in dashboard CSV export (#4787)

* Add channels.csv to dashboard CSV export

* Feature flag channels in CSV

* Disable credo

lib/plausible_web/controllers/api/stats_controller.ex

@@ -495,12 +495,22 @@ defmodule PlausibleWeb.Api.StatsController do
       Stats.breakdown(site, query, metrics, pagination)
       |> transform_keys(%{channel: :name})
 
+    if params["csv"] do
+      if Filters.filtering_on_dimension?(query, "event:goal") do
+        res
+        |> transform_keys(%{visitors: :conversions})
+        |> to_csv([:name, :conversions, :conversion_rate])
+      else
+        res |> to_csv([:name, :visitors, :bounce_rate, :visit_duration])
+      end
+    else
       json(conn, %{
         results: res,
         meta: Stats.Breakdown.formatted_date_ranges(query),
         skip_imported_reason: query.skip_imported_reason
       })
     end
+  end
 
   on_ee do
     def funnel(conn, %{"id" => funnel_id} = params) do

lib/plausible_web/controllers/stats_controller.ex

@@ -144,6 +144,15 @@ defmodule PlausibleWeb.StatsController do
         ~c"custom_props.csv" => fn -> Api.StatsController.all_custom_prop_values(conn, params) end
       }
 
+      # credo:disable-for-lines:7
+      csvs =
+        if FunWithFlags.enabled?(:channels, for: site) ||
+             FunWithFlags.enabled?(:channels, for: conn.assigns[:current_user]) do
+          Map.put(csvs, ~c"channels.csv", fn -> Api.StatsController.channels(conn, params) end)
+        else
+          csvs
+        end
+
       csv_values =
         Map.values(csvs)
         |> Plausible.ClickhouseRepo.parallel_tasks()

test/plausible_web/controllers/CSVs/30d-filter-goal/channels.csv

@@ -0,0 +1,2 @@
+name,conversions,conversion_rate
+Direct,1,50.0

test/plausible_web/controllers/CSVs/30d-filter-path/channels.csv

@@ -0,0 +1,2 @@
+name,visitors,bounce_rate,visit_duration
+Organic Search,1,0,60

test/plausible_web/controllers/CSVs/30d/channels.csv

@@ -0,0 +1,4 @@
+name,visitors,bounce_rate,visit_duration
+Direct,2,50,30
+Organic Search,1,0,60
+Paid Search,1,100,0

test/plausible_web/controllers/CSVs/6m/channels.csv

@@ -0,0 +1,4 @@
+name,visitors,bounce_rate,visit_duration
+Direct,2,50,30
+Paid Search,2,100,0
+Organic Search,1,0,60

test/plausible_web/controllers/stats_controller_test.exs

@@ -208,6 +208,7 @@ defmodule PlausibleWeb.StatsControllerTest do
       assert ~c"pages.csv" in zip
       assert ~c"regions.csv" in zip
       assert ~c"sources.csv" in zip
+      assert ~c"channels.csv" in zip
       assert ~c"utm_campaigns.csv" in zip
       assert ~c"utm_contents.csv" in zip
       assert ~c"utm_mediums.csv" in zip
@@ -423,6 +424,7 @@ defmodule PlausibleWeb.StatsControllerTest do
       expected_filenames = [
         "visitors.csv",
         "sources.csv",
+        "channels.csv",
         "utm_mediums.csv",
         "utm_sources.csv",
         "utm_campaigns.csv",
@@ -471,6 +473,13 @@ defmodule PlausibleWeb.StatsControllerTest do
                    [""]
                  ]
 
+        # Dummy - imported data is not actually included in exported CSVs yet
+        {~c"channels.csv", data} ->
+          assert parse_csv(data) == [
+                   ["name", "visitors", "bounce_rate", "visit_duration"],
+                   [""]
+                 ]
+
         {~c"utm_mediums.csv", data} ->
           assert parse_csv(data) == [
                    ["name", "visitors", "bounce_rate", "visit_duration"],
@@ -685,7 +694,8 @@ defmodule PlausibleWeb.StatsControllerTest do
         country_code: "EE",
         subdivision1_code: "EE-37",
         city_geoname_id: 588_409,
-        referrer_source: "Google"
+        referrer_source: "Google",
+        channel: "Organic Search"
       ),
       build(:pageview,
         user_id: 123,
@@ -695,7 +705,8 @@ defmodule PlausibleWeb.StatsControllerTest do
         country_code: "EE",
         subdivision1_code: "EE-37",
         city_geoname_id: 588_409,
-        referrer_source: "Google"
+        referrer_source: "Google",
+        channel: "Organic Search"
       ),
       build(:pageview,
         pathname: "/",
@@ -706,6 +717,7 @@ defmodule PlausibleWeb.StatsControllerTest do
         utm_source: "google",
         utm_content: "content",
         utm_term: "term",
+        channel: "Paid Search",
         browser: "Firefox",
         browser_version: "120",
         operating_system: "Mac",
@@ -726,6 +738,7 @@ defmodule PlausibleWeb.StatsControllerTest do
         utm_campaign: "ads",
         country_code: "EE",
         referrer_source: "Google",
+        channel: "Paid Search",
         browser: "FirefoxNoVersion",
         operating_system: "MacNoVersion"
       ),

test/test_helper.exs

@@ -6,6 +6,7 @@ end
 Mox.defmock(Plausible.HTTPClient.Mock, for: Plausible.HTTPClient.Interface)
 Application.ensure_all_started(:double)
 
+FunWithFlags.enable(:channels)
 # Temporary flag to test `read_team_schemas` flag on all tests.
 if System.get_env("TEST_READ_TEAM_SCHEMAS") == "1" do
   FunWithFlags.enable(:read_team_schemas)