auth via somethingawful cookie

lib/something_erlang/awful_api/client.ex

@@ -3,12 +3,12 @@ defmodule SomethingErlang.AwfulApi.Client do
   @user_agent "SomethingErlangClient/0.1"
 
   def thread_doc(id, page, user) do
-    resp = new_request(user) |> get_thread(id, page)
+    resp = new(user) |> get_thread(id, page)
     :unicode.characters_to_binary(resp.body, :latin1)
   end
 
   def thread_lastseen_page(id, user) do
-    resp = new_request(user) |> get_thread_newpost(id)
+    resp = new(user) |> get_thread_newpost(id)
     %{status: 302, headers: headers} = resp
     {"location", redir_url} = List.keyfind(headers, "location", 0)
     [_, page] = Regex.run(~r/pagenumber=(\d+)/, redir_url)
@@ -16,11 +16,11 @@ defmodule SomethingErlang.AwfulApi.Client do
   end
 
   def bookmarks_doc(page, user) do
-    resp = new_request(user) |> get_bookmarks(page)
+    resp = new(user) |> get_bookmarks(page)
     :unicode.characters_to_binary(resp.body, :latin1)
   end
 
-  defp get_thread(req, id, page \\ 1) do
+  defp get_thread(req, id, page) do
     url = "showthread.php"
     params = [threadid: id, pagenumber: page]
     Req.get!(req, url: url, params: params)
@@ -32,13 +32,34 @@ defmodule SomethingErlang.AwfulApi.Client do
     Req.get!(req, url: url, params: params, follow_redirects: false)
   end
 
-  defp get_bookmarks(req, page \\ 1) do
+  defp get_bookmarks(req, page) do
     url = "bookmarkthreads.php"
     params = [pagenumber: page]
     Req.get!(req, url: url, params: params)
   end
 
-  defp new_request(user) do
+  def login(username, password) do
+    form = [action: "login", username: username, password: password]
+    url = "account.php"
+
+    new()
+    |> Req.post!(url: url, form: form)
+    |> extract_cookies()
+  end
+
+  defp extract_cookies(%Req.Response{} = response) do
+    cookies = response.headers["set-cookie"]
+
+    for cookie <- cookies, String.starts_with?(cookie, "bb"), into: %{} do
+      cookie
+      |> String.split(";", parts: 2)
+      |> List.first()
+      |> String.split("=")
+      |> then(fn [k, v] -> {String.to_existing_atom(k), v} end)
+    end
+  end
+
+  defp new(user) do
     Req.new(
       base_url: @base_url,
       user_agent: @user_agent,
@@ -49,6 +70,16 @@ defmodule SomethingErlang.AwfulApi.Client do
     #    |> Req.Request.append_request_steps(inspect: &IO.inspect/1)
   end
 
+  defp new() do
+    Req.new(
+      base_url: @base_url,
+      user_agent: @user_agent,
+      redirect: false
+    )
+
+    #    |> Req.Request.append_request_steps(inspect: &IO.inspect/1)
+  end
+
   defp cookies(args) when is_map(args) do
     Enum.map_join(args, "; ", fn {k, v} -> "#{k}=#{v}" end)
   end