Add module that produces YT chapters from markers CSV

lib/changelog/kits/marker_kit.ex

@@ -0,0 +1,17 @@
+defmodule Changelog.Kits.MarkerKit do
+  alias ChangelogWeb.TimeView
+  NimbleCSV.define(CsvParser, separator: "\t", escape: "\"")
+
+  # Name	Start	Duration	Time Format	Type	Description
+  def to_youtube(string) do
+    string
+    |> CsvParser.parse_string()
+    |> Enum.map(fn [name, start | _] -> "#{duration(start)} #{name}" end)
+    |> Enum.join("\n")
+  end
+
+  # Converting to seconds and back removes decimals and extra padding
+  defp duration(start) do
+    start |> TimeView.seconds() |> TimeView.duration()
+  end
+end

lib/changelog_web/views/time_view.ex

@@ -87,10 +87,20 @@ defmodule ChangelogWeb.TimeView do
 
   def seconds(duration) do
     case String.split(duration, ":") do
-      [h, m, s] -> to_seconds(:hours, h) + to_seconds(:minutes, m) + to_seconds(s)
-      [m, s] -> to_seconds(:minutes, m) + to_seconds(s)
-      [s] -> to_seconds(s)
-      _ -> 0
+      [h, m, s, ms] ->
+        to_seconds(:hours, h) + to_seconds(:minutes, m) + to_seconds(s) + to_seconds(:ms, ms)
+
+      [h, m, s] ->
+        to_seconds(:hours, h) + to_seconds(:minutes, m) + to_seconds(s)
+
+      [m, s] ->
+        to_seconds(:minutes, m) + to_seconds(s)
+
+      [s] ->
+        to_seconds(s)
+
+      _ ->
+        0
     end
   end
 
@@ -139,6 +149,7 @@ defmodule ChangelogWeb.TimeView do
 
   defp to_seconds(:hours, str), do: string_to_rounded_integer(str) * 3600
   defp to_seconds(:minutes, str), do: string_to_rounded_integer(str) * 60
+  defp to_seconds(:ms, str), do: round(string_to_rounded_integer(str) / 60)
   defp to_seconds(str), do: string_to_rounded_integer(str)
 
   defp string_to_rounded_integer(str) do

test/changelog/kits/marker_kit_test.exs

@@ -0,0 +1,27 @@
+defmodule Changelog.MarkerKitTest do
+  use ExUnit.Case
+  import Changelog.TestCase
+  alias Changelog.Kits.MarkerKit
+
+  describe "to_youtube/1" do
+    test "works for News 127" do
+      [csv, desired] =
+        "/markers/news-127.csv"
+        |> fixtures_path()
+        |> File.read!()
+        |> String.split("---")
+
+      assert MarkerKit.to_youtube(csv) == String.trim(desired)
+    end
+
+    test "works for Iterviews 624" do
+      [csv, desired] =
+        "/markers/interviews-624.csv"
+        |> fixtures_path()
+        |> File.read!()
+        |> String.split("---")
+
+      assert MarkerKit.to_youtube(csv) == String.trim(desired)
+    end
+  end
+end

test/changelog_web/views/time_view_test.exs

@@ -80,6 +80,10 @@ defmodule ChangelogWeb.TimeViewTest do
       assert seconds("10:00:00") == 36_000
     end
 
+    test "when duration is hour, minutes, seconds, and milliseconds" do
+      assert seconds("01:35:10:70") == 5711
+    end
+
     test "when duration has fraction of a sentence" do
       assert seconds("59.17") == 59
       assert seconds("01:35:10.70") == 5711

test/fixtures/markers/interviews-624.csv

@@ -0,0 +1,50 @@
+Name	Start	Duration	Time Format	Type	Description
+When NPR calls	00:01:41:14	00:00:00:00	24 fps	Cue
+What is embedded?	00:03:23:18	00:00:00:00	24 fps	Cue
+Programming non-computers	00:07:09:08	00:00:00:00	24 fps	Cue
+How Elecia got started	00:11:40:22	00:00:00:00	24 fps	Cue
+The moment of discovery	00:14:13:04	00:00:00:00	24 fps	Cue
+Mentoring for embedded	00:15:48:22	00:00:00:00	24 fps	Cue
+Wokwi is cool	00:18:43:00	00:00:00:00	24 fps	Cue
+The chasm between sim and real	00:22:16:18	00:00:00:00	24 fps	Cue
+The constraints of embedded	00:26:49:12	00:00:00:00	24 fps	Cue
+SILICON VALLEY	00:30:13:10	00:00:00:00	24 fps	Cue
+How big is the embedded world?	00:30:51:18	00:00:00:00	24 fps	Cue
+Open source + embedded	00:34:49:16	00:00:00:00	24 fps	Cue
+Elecia loves Kalman filters!	00:36:19:18	00:00:00:00	24 fps	Cue
+Elecia's thoughts on self-driving cars	00:40:04:20	00:00:00:00	24 fps	Cue
+Self-driving on a closed-system	00:49:27:12	00:00:00:00	24 fps	Cue
+GoPro is embedded	00:51:29:18	00:00:00:00	24 fps	Cue
+Traeger smokers are embedded	00:55:29:20	00:00:00:00	24 fps	Cue
+What do you want to build next?	01:01:28:04	00:00:00:00	24 fps	Cue
+Crunch Labs!	01:04:51:14	00:00:00:00	24 fps	Cue
+What else is cool?	01:07:58:18	00:00:00:00	24 fps	Cue
+Embedded is going everywhere	01:09:51:04	00:00:00:00	24 fps	Cue
+IoT, let us 'opt out'	01:15:10:20	00:00:00:00	24 fps	Cue
+Embedded.fm and other places	01:18:47:08	00:00:00:00	24 fps	Cue
+Wrapping up	01:22:55:18	00:00:00:00	24 fps	Cue
+---
+01:41 When NPR calls
+03:23 What is embedded?
+07:09 Programming non-computers
+11:40 How Elecia got started
+14:13 The moment of discovery
+15:48 Mentoring for embedded
+18:43 Wokwi is cool
+22:16 The chasm between sim and real
+26:49 The constraints of embedded
+30:13 SILICON VALLEY
+30:51 How big is the embedded world?
+34:49 Open source + embedded
+36:19 Elecia loves Kalman filters!
+40:04 Elecia's thoughts on self-driving cars
+49:27 Self-driving on a closed-system
+51:29 GoPro is embedded
+55:29 Traeger smokers are embedded
+1:01:28 What do you want to build next?
+1:04:51 Crunch Labs!
+1:07:58 What else is cool?
+1:09:51 Embedded is going everywhere
+1:15:10 IoT, let us 'opt out'
+1:18:47 Embedded.fm and other places
+1:22:55 Wrapping up

test/fixtures/markers/news-127.csv

@@ -0,0 +1,18 @@
+Name	Start	Duration	Time Format	Type	Description
+What up, streaming nerds?	00:00:00.000	0:55.854	decimal	Cue
+The new $30,000 side hustle	0:55.854	1:00.189	decimal	Cue
+Mistakes we make in large codebases	1:56.044	1:02.989	decimal	Cue
+Apple is killing Swift	2:59.033	0:58.213	decimal	Cue
+Sponsor: Retool	3:57.247	1:13.584	decimal	Cue
+Turns GitHub repos into interactive diagrams	5:10.826	0:32.453	decimal	Cue
+Exploring a stablecoin bank	5:43.279	1:26.438	decimal	Cue
+That's the news for now	7:09.718	1:05.632	decimal	Cue
+---
+00:00 What up, streaming nerds?
+00:56 The new $30,000 side hustle
+01:56 Mistakes we make in large codebases
+02:59 Apple is killing Swift
+03:57 Sponsor: Retool
+05:11 Turns GitHub repos into interactive diagrams
+05:43 Exploring a stablecoin bank
+07:10 That's the news for now