From 1bea67cb5e70ae28209a193c33b9da2d3c41cfb7 Mon Sep 17 00:00:00 2001
From: Egor Kislitsyn <egor@kislitsyn.com>
Date: Tue, 24 Sep 2019 14:14:34 +0700
Subject: [PATCH] Cleanup Pleroma.User

---
 lib/pleroma/user.ex                                | 231 +++++++++------------
 lib/pleroma/web/common_api/common_api.ex           |  25 +--
 .../web/twitter_api/twitter_api_controller.ex      |   7 +-
 3 files changed, 108 insertions(+), 155 deletions(-)

diff --git a/lib/pleroma/user.ex b/lib/pleroma/user.ex
index 422bc6fa6..640ef05c4 100644
--- a/lib/pleroma/user.ex
+++ b/lib/pleroma/user.ex
@@ -106,9 +106,7 @@ defmodule Pleroma.User do
   def profile_url(%User{ap_id: ap_id}), do: ap_id
   def profile_url(_), do: nil
 
-  def ap_id(%User{nickname: nickname}) do
-    "#{Web.base_url()}/users/#{nickname}"
-  end
+  def ap_id(%User{nickname: nickname}), do: "#{Web.base_url()}/users/#{nickname}"
 
   def ap_followers(%User{follower_address: fa}) when is_binary(fa), do: fa
   def ap_followers(%User{} = user), do: "#{ap_id(user)}/followers"
@@ -119,12 +117,9 @@ defmodule Pleroma.User do
 
   def user_info(%User{} = user, args \\ %{}) do
     following_count =
-      if args[:following_count],
-        do: args[:following_count],
-        else: user.info.following_count || following_count(user)
+      Map.get(args, :following_count, user.info.following_count || following_count(user))
 
-    follower_count =
-      if args[:follower_count], do: args[:follower_count], else: user.info.follower_count
+    follower_count = Map.get(args, :follower_count, user.info.follower_count)
 
     %{
       note_count: user.info.note_count,
@@ -137,12 +132,11 @@ defmodule Pleroma.User do
   end
 
   def follow_state(%User{} = user, %User{} = target) do
-    follow_activity = Utils.fetch_latest_follow(user, target)
-
-    if follow_activity,
-      do: follow_activity.data["state"],
+    case Utils.fetch_latest_follow(user, target) do
+      %{data: %{"state" => state}} -> state
       # Ideally this would be nil, but then Cachex does not commit the value
-      else: false
+      _ -> false
+    end
   end
 
   def get_cached_follow_state(user, target) do
@@ -152,11 +146,7 @@ defmodule Pleroma.User do
 
   @spec set_follow_state_cache(String.t(), String.t(), String.t()) :: {:ok | :error, boolean()}
   def set_follow_state_cache(user_ap_id, target_ap_id, state) do
-    Cachex.put(
-      :user_cache,
-      "follow_state:#{user_ap_id}|#{target_ap_id}",
-      state
-    )
+    Cachex.put(:user_cache, "follow_state:#{user_ap_id}|#{target_ap_id}", state)
   end
 
   def set_info_cache(user, args) do
@@ -197,32 +187,25 @@ defmodule Pleroma.User do
       |> truncate_if_exists(:name, name_limit)
       |> truncate_if_exists(:bio, bio_limit)
 
-    changes =
-      %User{}
+    changeset =
+      %User{local: false}
       |> cast(params, [:bio, :name, :ap_id, :nickname, :avatar])
       |> validate_required([:name, :ap_id])
       |> unique_constraint(:nickname)
       |> validate_format(:nickname, @email_regex)
       |> validate_length(:bio, max: bio_limit)
       |> validate_length(:name, max: name_limit)
-      |> put_change(:local, false)
       |> change_info(&User.Info.remote_user_creation(&1, params[:info]))
 
-    if changes.valid? do
-      case info_cng.changes[:source_data] do
-        %{"followers" => followers, "following" => following} ->
-          changes
-          |> put_change(:follower_address, followers)
-          |> put_change(:following_address, following)
+    case params[:info][:source_data] do
+      %{"followers" => followers, "following" => following} ->
+        changeset
+        |> put_change(:follower_address, followers)
+        |> put_change(:following_address, following)
 
-        _ ->
-          followers = User.ap_followers(%User{nickname: changes.changes[:nickname]})
-
-          changes
-          |> put_change(:follower_address, followers)
-      end
-    else
-      changes
+      _ ->
+        followers = ap_followers(%User{nickname: get_field(changeset, :nickname)})
+        put_change(changeset, :follower_address, followers)
     end
   end
 
@@ -308,43 +291,39 @@ defmodule Pleroma.User do
         opts[:need_confirmation]
       end
 
-    info_change =
-      User.Info.confirmation_changeset(%User.Info{}, need_confirmation: need_confirmation?)
+    struct
+    |> cast(params, [:bio, :email, :name, :nickname, :password, :password_confirmation])
+    |> validate_required([:name, :nickname, :password, :password_confirmation])
+    |> validate_confirmation(:password)
+    |> unique_constraint(:email)
+    |> unique_constraint(:nickname)
+    |> validate_exclusion(:nickname, Pleroma.Config.get([User, :restricted_nicknames]))
+    |> validate_format(:nickname, local_nickname_regex())
+    |> validate_format(:email, @email_regex)
+    |> validate_length(:bio, max: bio_limit)
+    |> validate_length(:name, min: 1, max: name_limit)
+    |> change_info(&User.Info.confirmation_changeset(&1, need_confirmation: need_confirmation?))
+    |> maybe_validate_required_email(opts[:external])
+    |> put_password_hash
+    |> put_ap_id()
+    |> unique_constraint(:ap_id)
+    |> put_following_and_follower_address()
+  end
 
-    changeset =
-      struct
-      |> cast(params, [:bio, :email, :name, :nickname, :password, :password_confirmation])
-      |> validate_required([:name, :nickname, :password, :password_confirmation])
-      |> validate_confirmation(:password)
-      |> unique_constraint(:email)
-      |> unique_constraint(:nickname)
-      |> validate_exclusion(:nickname, Pleroma.Config.get([User, :restricted_nicknames]))
-      |> validate_format(:nickname, local_nickname_regex())
-      |> validate_format(:email, @email_regex)
-      |> validate_length(:bio, max: bio_limit)
-      |> validate_length(:name, min: 1, max: name_limit)
-      |> put_change(:info, info_change)
+  def maybe_validate_required_email(changeset, true), do: changeset
+  def maybe_validate_required_email(changeset, _), do: validate_required(changeset, [:email])
 
-    changeset =
-      if opts[:external] do
-        changeset
-      else
-        validate_required(changeset, [:email])
-      end
+  defp put_ap_id(changeset) do
+    ap_id = ap_id(%User{nickname: get_field(changeset, :nickname)})
+    put_change(changeset, :ap_id, ap_id)
+  end
 
-    if changeset.valid? do
-      ap_id = User.ap_id(%User{nickname: changeset.changes[:nickname]})
-      followers = User.ap_followers(%User{nickname: changeset.changes[:nickname]})
+  defp put_following_and_follower_address(changeset) do
+    followers = ap_followers(%User{nickname: get_field(changeset, :nickname)})
 
-      changeset
-      |> put_password_hash
-      |> put_change(:ap_id, ap_id)
-      |> unique_constraint(:ap_id)
-      |> put_change(:following, [followers])
-      |> put_change(:follower_address, followers)
-    else
-      changeset
-    end
+    changeset
+    |> put_change(:following, [followers])
+    |> put_change(:follower_address, followers)
   end
 
   defp autofollow_users(user) do
@@ -359,9 +338,8 @@ defmodule Pleroma.User do
 
   @doc "Inserts provided changeset, performs post-registration actions (confirmation email sending etc.)"
   def register(%Ecto.Changeset{} = changeset) do
-    with {:ok, user} <- Repo.insert(changeset),
-         {:ok, user} <- post_register_action(user) do
-      {:ok, user}
+    with {:ok, user} <- Repo.insert(changeset) do
+      post_register_action(user)
     end
   end
 
@@ -407,7 +385,7 @@ defmodule Pleroma.User do
   end
 
   def maybe_direct_follow(%User{} = follower, %User{} = followed) do
-    if not User.ap_enabled?(followed) do
+    if not ap_enabled?(followed) do
       follow(follower, followed)
     else
       {:ok, follower}
@@ -440,9 +418,7 @@ defmodule Pleroma.User do
 
     {1, [follower]} = Repo.update_all(q, [])
 
-    Enum.each(followeds, fn followed ->
-      update_follower_count(followed)
-    end)
+    Enum.each(followeds, &update_follower_count/1)
 
     set_cache(follower)
   end
@@ -552,8 +528,6 @@ defmodule Pleroma.User do
   def update_and_set_cache(changeset) do
     with {:ok, user} <- Repo.update(changeset, stale_error_field: :id) do
       set_cache(user)
-    else
-      e -> e
     end
   end
 
@@ -590,9 +564,7 @@ defmodule Pleroma.User do
     key = "nickname:#{nickname}"
 
     Cachex.fetch!(:user_cache, key, fn ->
-      user_result = get_or_fetch_by_nickname(nickname)
-
-      case user_result do
+      case get_or_fetch_by_nickname(nickname) do
         {:ok, user} -> {:commit, user}
         {:error, _error} -> {:ignore, nil}
       end
@@ -632,13 +604,11 @@ defmodule Pleroma.User do
 
   def get_cached_user_info(user) do
     key = "user_info:#{user.id}"
-    Cachex.fetch!(:user_cache, key, fn _ -> user_info(user) end)
+    Cachex.fetch!(:user_cache, key, fn -> user_info(user) end)
   end
 
   def fetch_by_nickname(nickname) do
-    ap_try = ActivityPub.make_user_from_nickname(nickname)
-
-    case ap_try do
+    case ActivityPub.make_user_from_nickname(nickname) do
       {:ok, user} -> {:ok, user}
       _ -> OStatus.make_user(nickname)
     end
@@ -673,7 +643,8 @@ defmodule Pleroma.User do
   end
 
   def get_followers_query(user, page) do
-    from(u in get_followers_query(user, nil))
+    user
+    |> get_followers_query(nil)
     |> User.Query.paginate(page, 20)
   end
 
@@ -689,18 +660,17 @@ defmodule Pleroma.User do
 
   @spec get_external_followers(User.t(), pos_integer()) :: {:ok, list(User.t())}
   def get_external_followers(user, page \\ nil) do
-    q =
-      user
-      |> get_followers_query(page)
-      |> User.Query.build(%{external: true})
-
-    {:ok, Repo.all(q)}
+    user
+    |> get_followers_query(page)
+    |> User.Query.build(%{external: true})
+    |> Repo.all()
   end
 
   def get_followers_ids(user, page \\ nil) do
-    q = get_followers_query(user, page)
-
-    Repo.all(from(u in q, select: u.id))
+    user
+    |> get_followers_query(page)
+    |> select([u], u.id)
+    |> Repo.all()
   end
 
   @spec get_friends_query(User.t(), pos_integer() | nil) :: Ecto.Query.t()
@@ -709,7 +679,8 @@ defmodule Pleroma.User do
   end
 
   def get_friends_query(user, page) do
-    from(u in get_friends_query(user, nil))
+    user
+    |> get_friends_query(nil)
     |> User.Query.paginate(page, 20)
   end
 
@@ -723,9 +694,10 @@ defmodule Pleroma.User do
   end
 
   def get_friends_ids(user, page \\ nil) do
-    q = get_friends_query(user, page)
-
-    Repo.all(from(u in q, select: u.id))
+    user
+    |> get_friends_query(page)
+    |> select([u], u.id)
+    |> Repo.all()
   end
 
   @spec get_follow_requests(User.t()) :: {:ok, [User.t()]}
@@ -889,12 +861,10 @@ defmodule Pleroma.User do
   end
 
   def subscribe(subscriber, %{ap_id: ap_id}) do
-    deny_follow_blocked = Pleroma.Config.get([:user, :deny_follow_blocked])
-
     with %User{} = subscribed <- get_cached_by_ap_id(ap_id) do
-      blocked = blocks?(subscribed, subscriber) and deny_follow_blocked
+      deny_follow_blocked = Pleroma.Config.get([:user, :deny_follow_blocked])
 
-      if blocked do
+      if blocks?(subscribed, subscriber) and deny_follow_blocked do
         {:error, "Could not subscribe: #{subscribed.nickname} is blocking you"}
       else
         update_info(subscribed, &User.Info.add_to_subscribers(&1, subscriber.ap_id))
@@ -933,9 +903,7 @@ defmodule Pleroma.User do
         blocker
       end
 
-    if following?(blocked, blocker) do
-      unfollow(blocked, blocker)
-    end
+    if following?(blocked, blocker), do: unfollow(blocked, blocker)
 
     {:ok, blocker} = update_follower_count(blocker)
 
@@ -1168,17 +1136,19 @@ defmodule Pleroma.User do
   end
 
   defp delete_activity(%{data: %{"type" => "Like"}} = activity) do
-    user = get_cached_by_ap_id(activity.actor)
     object = Object.normalize(activity)
 
-    ActivityPub.unlike(user, object)
+    activity.actor
+    |> get_cached_by_ap_id()
+    |> ActivityPub.unlike(object)
   end
 
   defp delete_activity(%{data: %{"type" => "Announce"}} = activity) do
-    user = get_cached_by_ap_id(activity.actor)
     object = Object.normalize(activity)
 
-    ActivityPub.unannounce(user, object)
+    activity.actor
+    |> get_cached_by_ap_id()
+    |> ActivityPub.unannounce(object)
   end
 
   defp delete_activity(_activity), do: "Doing nothing"
@@ -1190,9 +1160,7 @@ defmodule Pleroma.User do
   def html_filter_policy(_), do: Pleroma.Config.get([:markup, :scrub_policy])
 
   def fetch_by_ap_id(ap_id) do
-    ap_try = ActivityPub.make_user_from_ap_id(ap_id)
-
-    case ap_try do
+    case ActivityPub.make_user_from_ap_id(ap_id) do
       {:ok, user} ->
         {:ok, user}
 
@@ -1207,7 +1175,7 @@ defmodule Pleroma.User do
   def get_or_fetch_by_ap_id(ap_id) do
     user = get_cached_by_ap_id(ap_id)
 
-    if !is_nil(user) and !User.needs_update?(user) do
+    if !is_nil(user) and !needs_update?(user) do
       {:ok, user}
     else
       # Whether to fetch initial posts for the user (if it's a new user & the fetching is enabled)
@@ -1227,19 +1195,20 @@ defmodule Pleroma.User do
 
   @doc "Creates an internal service actor by URI if missing.  Optionally takes nickname for addressing."
   def get_or_create_service_actor_by_ap_id(uri, nickname \\ nil) do
-    if user = get_cached_by_ap_id(uri) do
+    with %User{} = user <- get_cached_by_ap_id(uri) do
       user
     else
-      changes =
-        %User{info: %User.Info{}}
-        |> cast(%{}, [:ap_id, :nickname, :local])
-        |> put_change(:ap_id, uri)
-        |> put_change(:nickname, nickname)
-        |> put_change(:local, true)
-        |> put_change(:follower_address, uri <> "/followers")
+      _ ->
+        {:ok, user} =
+          %User{info: %User.Info{}}
+          |> cast(%{}, [:ap_id, :nickname, :local])
+          |> put_change(:ap_id, uri)
+          |> put_change(:nickname, nickname)
+          |> put_change(:local, true)
+          |> put_change(:follower_address, uri <> "/followers")
+          |> Repo.insert()
 
-      {:ok, user} = Repo.insert(changes)
-      user
+        user
     end
   end
 
@@ -1296,23 +1265,21 @@ defmodule Pleroma.User do
   # this is because we have synchronous follow APIs and need to simulate them
   # with an async handshake
   def wait_and_refresh(_, %User{local: true} = a, %User{local: true} = b) do
-    with %User{} = a <- User.get_cached_by_id(a.id),
-         %User{} = b <- User.get_cached_by_id(b.id) do
+    with %User{} = a <- get_cached_by_id(a.id),
+         %User{} = b <- get_cached_by_id(b.id) do
       {:ok, a, b}
     else
-      _e ->
-        :error
+      nil -> :error
     end
   end
 
   def wait_and_refresh(timeout, %User{} = a, %User{} = b) do
     with :ok <- :timer.sleep(timeout),
-         %User{} = a <- User.get_cached_by_id(a.id),
-         %User{} = b <- User.get_cached_by_id(b.id) do
+         %User{} = a <- get_cached_by_id(a.id),
+         %User{} = b <- get_cached_by_id(b.id) do
       {:ok, a, b}
     else
-      _e ->
-        :error
+      nil -> :error
     end
   end
 
@@ -1374,7 +1341,7 @@ defmodule Pleroma.User do
   defp normalize_tags(tags) do
     [tags]
     |> List.flatten()
-    |> Enum.map(&String.downcase(&1))
+    |> Enum.map(&String.downcase/1)
   end
 
   defp local_nickname_regex do
diff --git a/lib/pleroma/web/common_api/common_api.ex b/lib/pleroma/web/common_api/common_api.ex
index 2f12ad43a..40eebe2aa 100644
--- a/lib/pleroma/web/common_api/common_api.ex
+++ b/lib/pleroma/web/common_api/common_api.ex
@@ -309,8 +309,7 @@ defmodule Pleroma.Web.CommonAPI do
       with {:ok, user} <- User.update_info(user, &User.Info.set_source_data(&1, source_data)) do
         user
       else
-        _e ->
-          user
+        _e -> user
       end
 
     ActivityPub.update(%{
@@ -338,11 +337,8 @@ defmodule Pleroma.Web.CommonAPI do
          {:ok, _user} <- User.update_info(user, &User.Info.add_pinnned_activity(&1, activity)) do
       {:ok, activity}
     else
-      %{errors: [pinned_activities: {err, _}]} ->
-        {:error, err}
-
-      _ ->
-        {:error, dgettext("errors", "Could not pin")}
+      {:error, %{changes: %{info: %{errors: [pinned_activities: {err, _}]}}}} -> {:error, err}
+      _ -> {:error, dgettext("errors", "Could not pin")}
     end
   end
 
@@ -351,11 +347,8 @@ defmodule Pleroma.Web.CommonAPI do
          {:ok, _user} <- User.update_info(user, &User.Info.remove_pinnned_activity(&1, activity)) do
       {:ok, activity}
     else
-      %{errors: [pinned_activities: {err, _}]} ->
-        {:error, err}
-
-      _ ->
-        {:error, dgettext("errors", "Could not unpin")}
+      %{errors: [pinned_activities: {err, _}]} -> {:error, err}
+      _ -> {:error, dgettext("errors", "Could not unpin")}
     end
   end
 
@@ -450,17 +443,13 @@ defmodule Pleroma.Web.CommonAPI do
 
   defp set_visibility(activity, _), do: {:ok, activity}
 
-  def hide_reblogs(user, muted) do
-    ap_id = muted.ap_id
-
+  def hide_reblogs(user, %{ap_id: ap_id} = _muted) do
     if ap_id not in user.info.muted_reblogs do
       User.update_info(user, &User.Info.add_reblog_mute(&1, ap_id))
     end
   end
 
-  def show_reblogs(user, muted) do
-    ap_id = muted.ap_id
-
+  def show_reblogs(user, %{ap_id: ap_id} = _muted) do
     if ap_id in user.info.muted_reblogs do
       User.update_info(user, &User.Info.remove_reblog_mute(&1, ap_id))
     end
diff --git a/lib/pleroma/web/twitter_api/twitter_api_controller.ex b/lib/pleroma/web/twitter_api/twitter_api_controller.ex
index 27f3664e0..aa06e2630 100644
--- a/lib/pleroma/web/twitter_api/twitter_api_controller.ex
+++ b/lib/pleroma/web/twitter_api/twitter_api_controller.ex
@@ -15,14 +15,11 @@ defmodule Pleroma.Web.TwitterAPI.Controller do
   action_fallback(:errors)
 
   def confirm_email(conn, %{"user_id" => uid, "token" => token}) do
-         true <- user.local,
-         true <- user.info.confirmation_pending,
-         true <- user.info.confirmation_token == token,
-      conn
-      |> redirect(to: "/")
     with %User{info: info} = user <- User.get_cached_by_id(uid),
+         true <- user.local and info.confirmation_pending and info.confirmation_token == token,
          {:ok, _} <-
            User.update_info(user, &User.Info.confirmation_changeset(&1, need_confirmation: false)) do
+      redirect(conn, to: "/")
     end
   end