add generate_turnstile_errors.livemd

generate_turnstile_errors.livemd

@@ -0,0 +1,66 @@
+# Generate Turnstile Errors as JSON
+
+```elixir
+Mix.install([
+  {:req, "~> 0.5.6"},
+  {:floki, "~> 0.36.2"},
+{:html5ever, "~> 0.16.0"}
+])
+```
+
+## Section
+
+```elixir
+page = Req.get!("https://developers.cloudflare.com/turnstile/troubleshooting/client-side-errors/error-codes/")
+```
+
+```elixir
+extract_code = fn row -> 
+  row
+    |> Floki.find("code")
+    |> Enum.map(&Floki.text/1)
+end
+```
+
+```elixir
+extract_retry = fn row ->
+  row |> Floki.find("td") |> Enum.drop(2) |> Enum.take(1) |> Floki.text() == "Yes"
+end
+```
+
+```elixir
+extract_name = fn row ->
+  row 
+  |> Floki.find("td")
+  |> Enum.drop(1)
+  |> Enum.at(0)
+  |> Floki.text()
+  |> String.split(":") 
+  |> Enum.at(0)
+  |> then(fn w -> Regex.replace(~r/[-\.]/, w, " ") end)
+  |> String.split(" ")
+  |> Enum.map(&String.capitalize/1)
+  |> Enum.join("")
+end
+```
+
+```elixir
+page.body |> Floki.parse_document!(html_parser: Floki.HTMLParser.Html5ever)
+|> Floki.find("table") 
+|> Floki.find("tr")
+|> Enum.drop(1)
+|> Enum.map(fn row ->
+  extract_code.(row) |> Enum.map(fn code -> 
+     do_retry = extract_retry.(row)
+      name = extract_name.(row)
+      %{code: code, do_retry: do_retry, name: name}
+  end)
+end
+) 
+|> Enum.flat_map(fn i -> i end)
+|> Enum.dedup()
+|> Enum.map(&:json.encode/1)
+|> Enum.map(&to_string/1)
+|> Enum.join(",\n")
+|> IO.puts
+```