From c3cca5d61381164eb86313d1938f07d47457287b Mon Sep 17 00:00:00 2001
From: Thomas Citharel <tcit@tcit.fr>
Date: Tue, 23 Jul 2019 18:06:22 +0200
Subject: [PATCH] Fix credo style reports following it's update

Mainly transform `with` into `case`

Signed-off-by: Thomas Citharel <tcit@tcit.fr>
---
 lib/mix/tasks/mobilizon/toot.ex               | 14 ++--
 lib/mobilizon/actors/actor.ex                 | 15 +++--
 lib/mobilizon/actors/actors.ex                | 51 ++++++++-------
 lib/mobilizon/events/events.ex                | 20 +++---
 lib/mobilizon/users/users.ex                  |  5 +-
 lib/mobilizon_web/api/search.ex               | 28 ++++----
 .../controllers/activity_pub_controller.ex    |  6 +-
 .../controllers/feed_controller.ex            | 60 ++++++++---------
 lib/mobilizon_web/resolvers/event.ex          | 11 ++--
 lib/mobilizon_web/resolvers/group.ex          | 23 +++----
 lib/mobilizon_web/resolvers/picture.ex        | 15 +++--
 lib/mobilizon_web/upload.ex                   |  4 +-
 lib/service/activity_pub/activity_pub.ex      | 33 ++++++----
 lib/service/activity_pub/converters/flag.ex   | 20 +++---
 lib/service/activity_pub/transmogrifier.ex    | 23 +++----
 lib/service/activity_pub/utils.ex             | 10 +--
 lib/service/export/feed.ex                    | 41 ++++++------
 lib/service/export/icalendar.ex               |  7 +-
 lib/service/federator.ex                      |  6 +-
 lib/service/geospatial/addok.ex               | 12 ++--
 lib/service/geospatial/map_quest.ex           | 18 ++---
 lib/service/geospatial/photon.ex              | 12 ++--
 .../http_signatures/http_signatures.ex        | 31 ++++-----
 lib/service/web_finger/web_finger.ex          | 14 ++--
 test/mobilizon/actors/actors_test.exs         |  7 +-
 test/mobilizon/events/events_test.exs         | 65 ++++++++++---------
 26 files changed, 303 insertions(+), 248 deletions(-)

diff --git a/lib/mix/tasks/mobilizon/toot.ex b/lib/mix/tasks/mobilizon/toot.ex
index 9c0d9094c..e3ae95747 100644
--- a/lib/mix/tasks/mobilizon/toot.ex
+++ b/lib/mix/tasks/mobilizon/toot.ex
@@ -10,11 +10,15 @@ defmodule Mix.Tasks.Mobilizon.Toot do
   def run([from, content]) do
     Mix.Task.run("app.start")
 
-    with {:ok, _} <- MobilizonWeb.API.Comments.create_comment(from, content) do
-      Mix.shell().info("Tooted")
-    else
-      {:local_actor, _} -> Mix.shell().error("Failed to toot.\nActor #{from} doesn't exist")
-      _ -> Mix.shell().error("Failed to toot.")
+    case MobilizonWeb.API.Comments.create_comment(from, content) do
+      {:ok, _} ->
+        Mix.shell().info("Tooted")
+
+      {:local_actor, _} ->
+        Mix.shell().error("Failed to toot.\nActor #{from} doesn't exist")
+
+      _ ->
+        Mix.shell().error("Failed to toot.")
     end
   end
 end
diff --git a/lib/mobilizon/actors/actor.ex b/lib/mobilizon/actors/actor.ex
index 6cd79ca7e..926bbc448 100644
--- a/lib/mobilizon/actors/actor.ex
+++ b/lib/mobilizon/actors/actor.ex
@@ -295,9 +295,10 @@ defmodule Mobilizon.Actors.Actor do
   """
   @spec prepare_public_key(String.t()) :: {:ok, tuple()} | {:error, :pem_decode_error}
   def prepare_public_key(public_key_code) do
-    with [public_key_entry] <- :public_key.pem_decode(public_key_code) do
-      {:ok, :public_key.pem_entry_decode(public_key_entry)}
-    else
+    case :public_key.pem_decode(public_key_code) do
+      [public_key_entry] ->
+        {:ok, :public_key.pem_entry_decode(public_key_entry)}
+
       _err ->
         {:error, :pem_decode_error}
     end
@@ -423,10 +424,10 @@ defmodule Mobilizon.Actors.Actor do
   """
   @spec unfollow(struct(), struct()) :: {:ok, Follower.t()} | {:error, Ecto.Changeset.t()}
   def unfollow(%Actor{} = followed, %Actor{} = follower) do
-    with {:already_following, %Follower{} = follow} <-
-           {:already_following, following?(follower, followed)} do
-      Actors.delete_follower(follow)
-    else
+    case {:already_following, following?(follower, followed)} do
+      {:already_following, %Follower{} = follow} ->
+        Actors.delete_follower(follow)
+
       {:already_following, false} ->
         {:error, "Could not unfollow actor: you are not following #{followed.preferred_username}"}
     end
diff --git a/lib/mobilizon/actors/actors.ex b/lib/mobilizon/actors/actors.ex
index 128dd468b..129bd34cb 100644
--- a/lib/mobilizon/actors/actors.ex
+++ b/lib/mobilizon/actors/actors.ex
@@ -281,21 +281,21 @@ defmodule Mobilizon.Actors do
       data
       |> Actor.remote_actor_creation()
 
-    with {:ok, actor} <-
-           Repo.insert(
-             cs,
-             on_conflict: [
-               set: [
-                 keys: data.keys,
-                 name: data.name,
-                 summary: data.summary
-               ]
-             ],
-             conflict_target: [:url]
-           ) do
-      actor = if preload, do: Repo.preload(actor, [:followers]), else: actor
-      {:ok, actor}
-    else
+    case Repo.insert(
+           cs,
+           on_conflict: [
+             set: [
+               keys: data.keys,
+               name: data.name,
+               summary: data.summary
+             ]
+           ],
+           conflict_target: [:url]
+         ) do
+      {:ok, actor} ->
+        actor = if preload, do: Repo.preload(actor, [:followers]), else: actor
+        {:ok, actor}
+
       err ->
         Logger.error(inspect(err))
         {:error, err}
@@ -474,9 +474,10 @@ defmodule Mobilizon.Actors do
   # TODO: Move this to Mobilizon.Service.ActivityPub
   @spec get_or_fetch_by_url(String.t(), bool()) :: {:ok, Actor.t()} | {:error, String.t()}
   def get_or_fetch_by_url(url, preload \\ false) do
-    with {:ok, actor} <- get_actor_by_url(url, preload) do
-      {:ok, actor}
-    else
+    case get_actor_by_url(url, preload) do
+      {:ok, actor} ->
+        {:ok, actor}
+
       _ ->
         case ActivityPub.make_actor_from_url(url, preload) do
           {:ok, actor} ->
@@ -497,9 +498,10 @@ defmodule Mobilizon.Actors do
   # TODO: Move this to Mobilizon.Service.ActivityPub
   @spec get_or_fetch_by_url!(String.t(), bool()) :: Actor.t()
   def get_or_fetch_by_url!(url, preload \\ false) do
-    with {:ok, actor} <- get_actor_by_url(url, preload) do
-      actor
-    else
+    case get_actor_by_url(url, preload) do
+      {:ok, actor} ->
+        actor
+
       _ ->
         case ActivityPub.make_actor_from_url(url, preload) do
           {:ok, actor} ->
@@ -1001,9 +1003,10 @@ defmodule Mobilizon.Actors do
   end
 
   defp safe_remove_file(url, %Actor{} = actor) do
-    with {:ok, _value} <- MobilizonWeb.Upload.remove(url) do
-      {:ok, actor}
-    else
+    case MobilizonWeb.Upload.remove(url) do
+      {:ok, _value} ->
+        {:ok, actor}
+
       {:error, error} ->
         Logger.error("Error while removing an upload file")
         Logger.error(inspect(error))
diff --git a/lib/mobilizon/events/events.ex b/lib/mobilizon/events/events.ex
index 38897e73d..f02a998bb 100644
--- a/lib/mobilizon/events/events.ex
+++ b/lib/mobilizon/events/events.ex
@@ -187,10 +187,12 @@ defmodule Mobilizon.Events do
 
   def get_cached_event_full_by_uuid(uuid) do
     Cachex.fetch(:activity_pub, "event_" <> uuid, fn "event_" <> uuid ->
-      with %Event{} = event <- get_event_full_by_uuid(uuid) do
-        {:commit, event}
-      else
-        _ -> {:ignore, nil}
+      case get_event_full_by_uuid(uuid) do
+        %Event{} = event ->
+          {:commit, event}
+
+        _ ->
+          {:ignore, nil}
       end
     end)
   end
@@ -1133,10 +1135,12 @@ defmodule Mobilizon.Events do
 
   def get_cached_comment_full_by_uuid(uuid) do
     Cachex.fetch(:activity_pub, "comment_" <> uuid, fn "comment_" <> uuid ->
-      with %Comment{} = comment <- get_comment_full_from_uuid(uuid) do
-        {:commit, comment}
-      else
-        _ -> {:ignore, nil}
+      case get_comment_full_from_uuid(uuid) do
+        %Comment{} = comment ->
+          {:commit, comment}
+
+        _ ->
+          {:ignore, nil}
       end
     end)
   end
diff --git a/lib/mobilizon/users/users.ex b/lib/mobilizon/users/users.ex
index 4f603cb79..0883f5d75 100644
--- a/lib/mobilizon/users/users.ex
+++ b/lib/mobilizon/users/users.ex
@@ -235,8 +235,9 @@ defmodule Mobilizon.Users do
   end
 
   def update_user_default_actor(user_id, actor_id) do
-    with from(u in User, where: u.id == ^user_id, update: [set: [default_actor_id: ^actor_id]])
-         |> Repo.update_all([]) do
+    with _ <-
+           from(u in User, where: u.id == ^user_id, update: [set: [default_actor_id: ^actor_id]])
+           |> Repo.update_all([]) do
       Repo.get!(User, user_id) |> Repo.preload([:default_actor])
     end
   end
diff --git a/lib/mobilizon_web/api/search.ex b/lib/mobilizon_web/api/search.ex
index 626936af5..0e1bfabe5 100644
--- a/lib/mobilizon_web/api/search.ex
+++ b/lib/mobilizon_web/api/search.ex
@@ -25,9 +25,10 @@ defmodule MobilizonWeb.API.Search do
       # Some URLs could be domain.tld/@username, so keep this condition above handle_search? function
       url_search?(search) ->
         # If this is not an actor, skip
-        with %{:total => total, :elements => [%Actor{}] = elements} <- process_from_url(search) do
-          {:ok, %{total: total, elements: elements}}
-        else
+        case process_from_url(search) do
+          %{:total => total, :elements => [%Actor{}] = elements} ->
+            {:ok, %{total: total, elements: elements}}
+
           _ ->
             {:ok, %{total: 0, elements: []}}
         end
@@ -55,9 +56,10 @@ defmodule MobilizonWeb.API.Search do
 
       url_search?(search) ->
         # If this is not an event, skip
-        with {total = total, [%Event{} = elements]} <- process_from_url(search) do
-          {:ok, %{total: total, elements: elements}}
-        else
+        case process_from_url(search) do
+          {total = total, [%Event{} = elements]} ->
+            {:ok, %{total: total, elements: elements}}
+
           _ ->
             {:ok, %{total: 0, elements: []}}
         end
@@ -70,9 +72,10 @@ defmodule MobilizonWeb.API.Search do
   # If the search string is an username
   @spec process_from_username(String.t()) :: %{total: integer(), elements: [Actor.t()]}
   defp process_from_username(search) do
-    with {:ok, actor} <- ActivityPub.find_or_make_actor_from_nickname(search) do
-      %{total: 1, elements: [actor]}
-    else
+    case ActivityPub.find_or_make_actor_from_nickname(search) do
+      {:ok, actor} ->
+        %{total: 1, elements: [actor]}
+
       {:error, _err} ->
         Logger.debug(fn -> "Unable to find or make actor '#{search}'" end)
         %{total: 0, elements: []}
@@ -85,9 +88,10 @@ defmodule MobilizonWeb.API.Search do
           elements: [Actor.t() | Event.t() | Comment.t()]
         }
   defp process_from_url(search) do
-    with {:ok, object} <- ActivityPub.fetch_object_from_url(search) do
-      %{total: 1, elements: [object]}
-    else
+    case ActivityPub.fetch_object_from_url(search) do
+      {:ok, object} ->
+        %{total: 1, elements: [object]}
+
       {:error, _err} ->
         Logger.debug(fn -> "Unable to find or make object from URL '#{search}'" end)
         %{total: 0, elements: []}
diff --git a/lib/mobilizon_web/controllers/activity_pub_controller.ex b/lib/mobilizon_web/controllers/activity_pub_controller.ex
index 59f1e8746..d091646ae 100644
--- a/lib/mobilizon_web/controllers/activity_pub_controller.ex
+++ b/lib/mobilizon_web/controllers/activity_pub_controller.ex
@@ -15,7 +15,7 @@ defmodule MobilizonWeb.ActivityPubController do
   action_fallback(:errors)
 
   def following(conn, %{"name" => name, "page" => page}) do
-    with {page, ""} = Integer.parse(page),
+    with {page, ""} <- Integer.parse(page),
          %Actor{} = actor <- Actors.get_local_actor_by_name_with_everything(name) do
       conn
       |> put_resp_header("content-type", "application/activity+json")
@@ -32,7 +32,7 @@ defmodule MobilizonWeb.ActivityPubController do
   end
 
   def followers(conn, %{"name" => name, "page" => page}) do
-    with {page, ""} = Integer.parse(page),
+    with {page, ""} <- Integer.parse(page),
          %Actor{} = actor <- Actors.get_local_actor_by_name_with_everything(name) do
       conn
       |> put_resp_header("content-type", "application/activity+json")
@@ -49,7 +49,7 @@ defmodule MobilizonWeb.ActivityPubController do
   end
 
   def outbox(conn, %{"name" => name, "page" => page}) do
-    with {page, ""} = Integer.parse(page),
+    with {page, ""} <- Integer.parse(page),
          %Actor{} = actor <- Actors.get_local_actor_by_name(name) do
       conn
       |> put_resp_header("content-type", "application/activity+json")
diff --git a/lib/mobilizon_web/controllers/feed_controller.ex b/lib/mobilizon_web/controllers/feed_controller.ex
index 828944f45..3b7a274be 100644
--- a/lib/mobilizon_web/controllers/feed_controller.ex
+++ b/lib/mobilizon_web/controllers/feed_controller.ex
@@ -7,60 +7,60 @@ defmodule MobilizonWeb.FeedController do
   action_fallback(MobilizonWeb.FallbackController)
 
   def actor(conn, %{"name" => name, "format" => "atom"}) do
-    with {status, data} when status in [:ok, :commit] <-
-           Cachex.fetch(:feed, "actor_" <> name) do
-      conn
-      |> put_resp_content_type("application/atom+xml")
-      |> send_resp(200, data)
-    else
+    case Cachex.fetch(:feed, "actor_" <> name) do
+      {status, data} when status in [:ok, :commit] ->
+        conn
+        |> put_resp_content_type("application/atom+xml")
+        |> send_resp(200, data)
+
       _err ->
         {:error, :not_found}
     end
   end
 
   def actor(conn, %{"name" => name, "format" => "ics"}) do
-    with {status, data} when status in [:ok, :commit] <-
-           Cachex.fetch(:ics, "actor_" <> name) do
-      conn
-      |> put_resp_content_type("text/calendar")
-      |> send_resp(200, data)
-    else
+    case Cachex.fetch(:ics, "actor_" <> name) do
+      {status, data} when status in [:ok, :commit] ->
+        conn
+        |> put_resp_content_type("text/calendar")
+        |> send_resp(200, data)
+
       _err ->
         {:error, :not_found}
     end
   end
 
   def event(conn, %{"uuid" => uuid, "format" => "ics"}) do
-    with {status, data} when status in [:ok, :commit] <-
-           Cachex.fetch(:ics, "event_" <> uuid) do
-      conn
-      |> put_resp_content_type("text/calendar")
-      |> send_resp(200, data)
-    else
+    case Cachex.fetch(:ics, "event_" <> uuid) do
+      {status, data} when status in [:ok, :commit] ->
+        conn
+        |> put_resp_content_type("text/calendar")
+        |> send_resp(200, data)
+
       _err ->
         {:error, :not_found}
     end
   end
 
   def going(conn, %{"token" => token, "format" => "ics"}) do
-    with {status, data} when status in [:ok, :commit] <-
-           Cachex.fetch(:ics, "token_" <> token) do
-      conn
-      |> put_resp_content_type("text/calendar")
-      |> send_resp(200, data)
-    else
+    case Cachex.fetch(:ics, "token_" <> token) do
+      {status, data} when status in [:ok, :commit] ->
+        conn
+        |> put_resp_content_type("text/calendar")
+        |> send_resp(200, data)
+
       _err ->
         {:error, :not_found}
     end
   end
 
   def going(conn, %{"token" => token, "format" => "atom"}) do
-    with {status, data} when status in [:ok, :commit] <-
-           Cachex.fetch(:feed, "token_" <> token) do
-      conn
-      |> put_resp_content_type("application/atom+xml")
-      |> send_resp(200, data)
-    else
+    case Cachex.fetch(:feed, "token_" <> token) do
+      {status, data} when status in [:ok, :commit] ->
+        conn
+        |> put_resp_content_type("application/atom+xml")
+        |> send_resp(200, data)
+
       _err ->
         {:error, :not_found}
     end
diff --git a/lib/mobilizon_web/resolvers/event.ex b/lib/mobilizon_web/resolvers/event.ex
index c53a47a86..339fbbdbc 100644
--- a/lib/mobilizon_web/resolvers/event.ex
+++ b/lib/mobilizon_web/resolvers/event.ex
@@ -176,11 +176,12 @@ defmodule MobilizonWeb.Resolvers.Event do
   # and that it's the actor requesting leaving the event we return true
   @spec check_that_participant_is_not_only_organizer(integer(), integer()) :: boolean()
   defp check_that_participant_is_not_only_organizer(event_id, actor_id) do
-    with [%Participant{actor: %Actor{id: participant_actor_id}}] <-
-           Mobilizon.Events.list_organizers_participants_for_event(event_id) do
-      participant_actor_id == actor_id
-    else
-      _ -> false
+    case Mobilizon.Events.list_organizers_participants_for_event(event_id) do
+      [%Participant{actor: %Actor{id: participant_actor_id}}] ->
+        participant_actor_id == actor_id
+
+      _ ->
+        false
     end
   end
 
diff --git a/lib/mobilizon_web/resolvers/group.ex b/lib/mobilizon_web/resolvers/group.ex
index a0a0d78ce..e24f4ae35 100644
--- a/lib/mobilizon_web/resolvers/group.ex
+++ b/lib/mobilizon_web/resolvers/group.ex
@@ -218,17 +218,18 @@ defmodule MobilizonWeb.Resolvers.Group do
   # and that it's the actor requesting leaving the group we return true
   @spec check_that_member_is_not_only_administrator(integer(), integer()) :: boolean()
   defp check_that_member_is_not_only_administrator(group_id, actor_id) do
-    with [
-           %Member{
-             actor: %Actor{
-               id: member_actor_id
-             }
-           }
-         ] <-
-           Member.list_administrator_members_for_group(group_id) do
-      actor_id == member_actor_id
-    else
-      _ -> false
+    case Member.list_administrator_members_for_group(group_id) do
+      [
+        %Member{
+          actor: %Actor{
+            id: member_actor_id
+          }
+        }
+      ] ->
+        actor_id == member_actor_id
+
+      _ ->
+        false
     end
   end
 end
diff --git a/lib/mobilizon_web/resolvers/picture.ex b/lib/mobilizon_web/resolvers/picture.ex
index c98a0346a..494ab6916 100644
--- a/lib/mobilizon_web/resolvers/picture.ex
+++ b/lib/mobilizon_web/resolvers/picture.ex
@@ -35,10 +35,17 @@ defmodule MobilizonWeb.Resolvers.Picture do
 
   @spec do_fetch_picture(String.t()) :: {:ok, Picture.t()} | {:error, :not_found}
   defp do_fetch_picture(picture_id) do
-    with %Picture{id: id, file: file} = _pic <- Media.get_picture(picture_id) do
-      {:ok,
-       %{name: file.name, url: file.url, id: id, content_type: file.content_type, size: file.size}}
-    else
+    case Media.get_picture(picture_id) do
+      %Picture{id: id, file: file} = _pic ->
+        {:ok,
+         %{
+           name: file.name,
+           url: file.url,
+           id: id,
+           content_type: file.content_type,
+           size: file.size
+         }}
+
       _err ->
         {:error, "Picture with ID #{picture_id} was not found"}
     end
diff --git a/lib/mobilizon_web/upload.ex b/lib/mobilizon_web/upload.ex
index c608324c2..486d820f1 100644
--- a/lib/mobilizon_web/upload.ex
+++ b/lib/mobilizon_web/upload.ex
@@ -94,7 +94,9 @@ defmodule MobilizonWeb.Upload do
          {:same_host, true} <- {:same_host, host == MobilizonWeb.Endpoint.host()} do
       MobilizonWeb.Uploaders.Uploader.remove_file(opts.uploader, path)
     else
-      %URI{} = _uri -> {:error, "URL doesn't match pattern"}
+      %URI{} = _uri ->
+        {:error, "URL doesn't match pattern"}
+
       {:same_host, _} ->
         Logger.error("Media can't be deleted because its URL doesn't match current host")
     end
diff --git a/lib/service/activity_pub/activity_pub.ex b/lib/service/activity_pub/activity_pub.ex
index be66b630b..0efdc5dcf 100644
--- a/lib/service/activity_pub/activity_pub.ex
+++ b/lib/service/activity_pub/activity_pub.ex
@@ -289,7 +289,7 @@ defmodule Mobilizon.Service.ActivityPub do
       "to" => [actor.url <> "/followers", "https://www.w3.org/ns/activitystreams#Public"]
     }
 
-    with Events.delete_event(event),
+    with {:ok, _} <- Events.delete_event(event),
          {:ok, activity, _object} <- insert(data, local),
          :ok <- maybe_federate(activity) do
       {:ok, activity}
@@ -304,7 +304,7 @@ defmodule Mobilizon.Service.ActivityPub do
       "to" => [actor.url <> "/followers", "https://www.w3.org/ns/activitystreams#Public"]
     }
 
-    with Events.delete_comment(comment),
+    with {:ok, _} <- Events.delete_comment(comment),
          {:ok, activity, _object} <- insert(data, local),
          :ok <- maybe_federate(activity) do
       {:ok, activity}
@@ -319,7 +319,7 @@ defmodule Mobilizon.Service.ActivityPub do
       "to" => [url <> "/followers", "https://www.w3.org/ns/activitystreams#Public"]
     }
 
-    with Actors.delete_actor(actor),
+    with {:ok, _} <- Actors.delete_actor(actor),
          {:ok, activity, _object} <- insert(data, local),
          :ok <- maybe_federate(activity) do
       {:ok, activity}
@@ -352,9 +352,10 @@ defmodule Mobilizon.Service.ActivityPub do
   """
   @spec make_actor_from_url(String.t(), boolean()) :: {:ok, %Actor{}} | {:error, any()}
   def make_actor_from_url(url, preload \\ false) do
-    with {:ok, data} <- fetch_and_prepare_actor_from_url(url) do
-      Actors.insert_or_update_actor(data, preload)
-    else
+    case fetch_and_prepare_actor_from_url(url) do
+      {:ok, data} ->
+        Actors.insert_or_update_actor(data, preload)
+
       # Request returned 410
       {:error, :actor_deleted} ->
         {:error, :actor_deleted}
@@ -371,10 +372,12 @@ defmodule Mobilizon.Service.ActivityPub do
   """
   @spec find_or_make_actor_from_nickname(String.t(), atom() | nil) :: tuple()
   def find_or_make_actor_from_nickname(nickname, type \\ nil) do
-    with %Actor{} = actor <- Actors.get_actor_by_name(nickname, type) do
-      {:ok, actor}
-    else
-      nil -> make_actor_from_nickname(nickname)
+    case Actors.get_actor_by_name(nickname, type) do
+      %Actor{} = actor ->
+        {:ok, actor}
+
+      nil ->
+        make_actor_from_nickname(nickname)
     end
   end
 
@@ -389,10 +392,12 @@ defmodule Mobilizon.Service.ActivityPub do
   """
   @spec make_actor_from_nickname(String.t()) :: {:ok, %Actor{}} | {:error, any()}
   def make_actor_from_nickname(nickname) do
-    with {:ok, %{"url" => url}} when not is_nil(url) <- WebFinger.finger(nickname) do
-      make_actor_from_url(url)
-    else
-      _e -> {:error, "No ActivityPub URL found in WebFinger"}
+    case WebFinger.finger(nickname) do
+      {:ok, %{"url" => url}} when not is_nil(url) ->
+        make_actor_from_url(url)
+
+      _e ->
+        {:error, "No ActivityPub URL found in WebFinger"}
     end
   end
 
diff --git a/lib/service/activity_pub/converters/flag.ex b/lib/service/activity_pub/converters/flag.ex
index 1a8fff623..fd5482700 100644
--- a/lib/service/activity_pub/converters/flag.ex
+++ b/lib/service/activity_pub/converters/flag.ex
@@ -37,18 +37,22 @@ defmodule Mobilizon.Service.ActivityPub.Converters.Flag do
     with {:ok, %Actor{} = reporter} <- Actors.get_actor_by_url(object["actor"]),
          %Actor{} = reported <-
            Enum.reduce_while(objects, nil, fn url, _ ->
-             with {:ok, %Actor{} = actor} <- Actors.get_actor_by_url(url) do
-               {:halt, actor}
-             else
-               _ -> {:cont, nil}
+             case Actors.get_actor_by_url(url) do
+               {:ok, %Actor{} = actor} ->
+                 {:halt, actor}
+
+               _ ->
+                 {:cont, nil}
              end
            end),
          event <-
            Enum.reduce_while(objects, nil, fn url, _ ->
-             with %Event{} = event <- Events.get_event_by_url(url) do
-               {:halt, event}
-             else
-               _ -> {:cont, nil}
+             case Events.get_event_by_url(url) do
+               %Event{} = event ->
+                 {:halt, event}
+
+               _ ->
+                 {:cont, nil}
              end
            end),
 
diff --git a/lib/service/activity_pub/transmogrifier.ex b/lib/service/activity_pub/transmogrifier.ex
index b35dc76ac..5f4658b37 100644
--- a/lib/service/activity_pub/transmogrifier.ex
+++ b/lib/service/activity_pub/transmogrifier.ex
@@ -209,19 +209,20 @@ defmodule Mobilizon.Service.ActivityPub.Transmogrifier do
           data
       )
       when object_type in ["Person", "Application", "Service", "Organization"] do
-    with {:ok, %Actor{url: url}} <- Actors.get_actor_by_url(object["id"]) do
-      {:ok, new_actor_data} = ActivityPub.actor_data_from_actor_object(object)
+    case Actors.get_actor_by_url(object["id"]) do
+      {:ok, %Actor{url: url}} ->
+        {:ok, new_actor_data} = ActivityPub.actor_data_from_actor_object(object)
 
-      Actors.insert_or_update_actor(new_actor_data)
+        Actors.insert_or_update_actor(new_actor_data)
+
+        ActivityPub.update(%{
+          local: false,
+          to: data["to"] || [],
+          cc: data["cc"] || [],
+          object: object,
+          actor: url
+        })
 
-      ActivityPub.update(%{
-        local: false,
-        to: data["to"] || [],
-        cc: data["cc"] || [],
-        object: object,
-        actor: url
-      })
-    else
       e ->
         Logger.error(inspect(e))
         :error
diff --git a/lib/service/activity_pub/utils.ex b/lib/service/activity_pub/utils.ex
index 47a40c959..4c31d3193 100644
--- a/lib/service/activity_pub/utils.ex
+++ b/lib/service/activity_pub/utils.ex
@@ -206,10 +206,12 @@ defmodule Mobilizon.Service.ActivityPub.Utils do
   Save picture data from %Plug.Upload{} and return AS Link data.
   """
   def make_picture_data(%Plug.Upload{} = picture) do
-    with {:ok, picture} <- MobilizonWeb.Upload.store(picture) do
-      picture
-    else
-      _ -> nil
+    case MobilizonWeb.Upload.store(picture) do
+      {:ok, picture} ->
+        picture
+
+      _ ->
+        nil
     end
   end
 
diff --git a/lib/service/export/feed.ex b/lib/service/export/feed.ex
index 65eb685f0..e58f05e3e 100644
--- a/lib/service/export/feed.ex
+++ b/lib/service/export/feed.ex
@@ -21,9 +21,10 @@ defmodule Mobilizon.Service.Export.Feed do
 
   @spec create_cache(String.t()) :: {:commit, String.t()} | {:ignore, any()}
   def create_cache("actor_" <> name) do
-    with {:ok, res} <- fetch_actor_event_feed(name) do
-      {:commit, res}
-    else
+    case fetch_actor_event_feed(name) do
+      {:ok, res} ->
+        {:commit, res}
+
       err ->
         {:ignore, err}
     end
@@ -31,9 +32,10 @@ defmodule Mobilizon.Service.Export.Feed do
 
   @spec create_cache(String.t()) :: {:commit, String.t()} | {:ignore, any()}
   def create_cache("token_" <> token) do
-    with {:ok, res} <- fetch_events_from_token(token) do
-      {:commit, res}
-    else
+    case fetch_events_from_token(token) do
+      {:ok, res} ->
+        {:commit, res}
+
       err ->
         {:ignore, err}
     end
@@ -99,21 +101,22 @@ defmodule Mobilizon.Service.Export.Feed do
   defp get_entry(%Event{} = event) do
     description = event.description || ""
 
-    with {:ok, html, []} <- Earmark.as_html(description) do
-      entry =
-        Entry.new(event.url, event.publish_at || event.inserted_at, event.title)
-        |> Entry.link(event.url, rel: "alternate", type: "text/html")
-        |> Entry.content({:cdata, html}, type: "html")
-        |> Entry.published(event.publish_at || event.inserted_at)
+    case Earmark.as_html(description) do
+      {:ok, html, []} ->
+        entry =
+          Entry.new(event.url, event.publish_at || event.inserted_at, event.title)
+          |> Entry.link(event.url, rel: "alternate", type: "text/html")
+          |> Entry.content({:cdata, html}, type: "html")
+          |> Entry.published(event.publish_at || event.inserted_at)
 
-      # Add tags
-      entry =
-        event.tags
-        |> Enum.uniq()
-        |> Enum.reduce(entry, fn tag, acc -> Entry.category(acc, tag.slug, label: tag.title) end)
+        # Add tags
+        entry =
+          event.tags
+          |> Enum.uniq()
+          |> Enum.reduce(entry, fn tag, acc -> Entry.category(acc, tag.slug, label: tag.title) end)
+
+        Entry.build(entry)
 
-      Entry.build(entry)
-    else
       {:error, _html, error_messages} ->
         Logger.error("Unable to produce HTML for Markdown", details: inspect(error_messages))
     end
diff --git a/lib/service/export/icalendar.ex b/lib/service/export/icalendar.ex
index d275ab9a0..866685b33 100644
--- a/lib/service/export/icalendar.ex
+++ b/lib/service/export/icalendar.ex
@@ -87,9 +87,10 @@ defmodule Mobilizon.Service.Export.ICalendar do
   Create cache for an actor
   """
   def create_cache("token_" <> token) do
-    with {:ok, res} <- fetch_events_from_token(token) do
-      {:commit, res}
-    else
+    case fetch_events_from_token(token) do
+      {:ok, res} ->
+        {:commit, res}
+
       err ->
         {:ignore, err}
     end
diff --git a/lib/service/federator.ex b/lib/service/federator.ex
index 161d36707..6be044bcd 100644
--- a/lib/service/federator.ex
+++ b/lib/service/federator.ex
@@ -51,8 +51,10 @@ defmodule Mobilizon.Service.Federator do
     Logger.info("Handling incoming AP activity")
     Logger.debug(inspect(params))
 
-    with {:ok, _activity} <- Transmogrifier.handle_incoming(params) do
-    else
+    case Transmogrifier.handle_incoming(params) do
+      {:ok, activity} ->
+        {:ok, activity}
+
       %Activity{} ->
         Logger.info("Already had #{params["id"]}")
 
diff --git a/lib/service/geospatial/addok.ex b/lib/service/geospatial/addok.ex
index 9a65c95be..399ba2847 100644
--- a/lib/service/geospatial/addok.ex
+++ b/lib/service/geospatial/addok.ex
@@ -23,7 +23,7 @@ defmodule Mobilizon.Service.Geospatial.Addok do
     with {:ok, %HTTPoison.Response{status_code: 200, body: body}} <-
            HTTPoison.get(url),
          {:ok, %{"features" => features}} <- Poison.decode(body) do
-      processData(features)
+      process_data(features)
     end
   end
 
@@ -39,7 +39,7 @@ defmodule Mobilizon.Service.Geospatial.Addok do
     with {:ok, %HTTPoison.Response{status_code: 200, body: body}} <-
            HTTPoison.get(url),
          {:ok, %{"features" => features}} <- Poison.decode(body) do
-      processData(features)
+      process_data(features)
     end
   end
 
@@ -59,23 +59,23 @@ defmodule Mobilizon.Service.Geospatial.Addok do
     end
   end
 
-  defp processData(features) do
+  defp process_data(features) do
     features
     |> Enum.map(fn %{"geometry" => geometry, "properties" => properties} ->
       %Address{
         country: Map.get(properties, "country"),
         locality: Map.get(properties, "city"),
         region: Map.get(properties, "state"),
-        description: Map.get(properties, "name") || streetAddress(properties),
+        description: Map.get(properties, "name") || street_address(properties),
         floor: Map.get(properties, "floor"),
         geom: Map.get(geometry, "coordinates") |> Provider.coordinates(),
         postal_code: Map.get(properties, "postcode"),
-        street: properties |> streetAddress()
+        street: properties |> street_address()
       }
     end)
   end
 
-  defp streetAddress(properties) do
+  defp street_address(properties) do
     if Map.has_key?(properties, "housenumber") do
       Map.get(properties, "housenumber") <> " " <> Map.get(properties, "street")
     else
diff --git a/lib/service/geospatial/map_quest.ex b/lib/service/geospatial/map_quest.ex
index b1f1570d8..340d173a1 100644
--- a/lib/service/geospatial/map_quest.ex
+++ b/lib/service/geospatial/map_quest.ex
@@ -39,7 +39,7 @@ defmodule Mobilizon.Service.Geospatial.MapQuest do
              },#{lon}&maxResults=#{limit}"
            ),
          {:ok, %{"results" => results, "info" => %{"statuscode" => 0}}} <- Poison.decode(body) do
-      results |> Enum.map(&processData/1)
+      results |> Enum.map(&process_data/1)
     else
       {:ok, %HTTPoison.Response{status_code: 403, body: err}} ->
         raise(ArgumentError, message: err)
@@ -71,14 +71,14 @@ defmodule Mobilizon.Service.Geospatial.MapQuest do
     with {:ok, %HTTPoison.Response{status_code: 200, body: body}} <-
            HTTPoison.get(url),
          {:ok, %{"results" => results, "info" => %{"statuscode" => 0}}} <- Poison.decode(body) do
-      results |> Enum.map(&processData/1)
+      results |> Enum.map(&process_data/1)
     else
       {:ok, %HTTPoison.Response{status_code: 403, body: err}} ->
         raise(ArgumentError, message: err)
     end
   end
 
-  defp processData(
+  defp process_data(
          %{
            "locations" => addresses,
            "providedLocation" => %{"latLng" => %{"lat" => lat, "lng" => lng}}
@@ -86,22 +86,22 @@ defmodule Mobilizon.Service.Geospatial.MapQuest do
        ) do
     case addresses do
       [] -> nil
-      addresses -> addresses |> hd |> produceAddress(lat, lng)
+      addresses -> addresses |> hd |> produce_address(lat, lng)
     end
   end
 
-  defp processData(%{"locations" => addresses}) do
+  defp process_data(%{"locations" => addresses}) do
     case addresses do
       [] -> nil
-      addresses -> addresses |> hd |> produceAddress()
+      addresses -> addresses |> hd |> produce_address()
     end
   end
 
-  defp produceAddress(%{"latLng" => %{"lat" => lat, "lng" => lng}} = address) do
-    produceAddress(address, lat, lng)
+  defp produce_address(%{"latLng" => %{"lat" => lat, "lng" => lng}} = address) do
+    produce_address(address, lat, lng)
   end
 
-  defp produceAddress(address, lat, lng) do
+  defp produce_address(address, lat, lng) do
     %Address{
       country: Map.get(address, "adminArea1"),
       locality: Map.get(address, "adminArea5"),
diff --git a/lib/service/geospatial/photon.ex b/lib/service/geospatial/photon.ex
index 75d6a37b3..5e4fcac4c 100644
--- a/lib/service/geospatial/photon.ex
+++ b/lib/service/geospatial/photon.ex
@@ -24,7 +24,7 @@ defmodule Mobilizon.Service.Geospatial.Photon do
     with {:ok, %HTTPoison.Response{status_code: 200, body: body}} <-
            HTTPoison.get(url),
          {:ok, %{"features" => features}} <- Poison.decode(body) do
-      processData(features)
+      process_data(features)
     end
   end
 
@@ -40,7 +40,7 @@ defmodule Mobilizon.Service.Geospatial.Photon do
     with {:ok, %HTTPoison.Response{status_code: 200, body: body}} <-
            HTTPoison.get(url),
          {:ok, %{"features" => features}} <- Poison.decode(body) do
-      processData(features)
+      process_data(features)
     end
   end
 
@@ -61,23 +61,23 @@ defmodule Mobilizon.Service.Geospatial.Photon do
     end
   end
 
-  defp processData(features) do
+  defp process_data(features) do
     features
     |> Enum.map(fn %{"geometry" => geometry, "properties" => properties} ->
       %Address{
         country: Map.get(properties, "country"),
         locality: Map.get(properties, "city"),
         region: Map.get(properties, "state"),
-        description: Map.get(properties, "name") || streetAddress(properties),
+        description: Map.get(properties, "name") || street_address(properties),
         floor: Map.get(properties, "floor"),
         geom: Map.get(geometry, "coordinates") |> Provider.coordinates(),
         postal_code: Map.get(properties, "postcode"),
-        street: properties |> streetAddress()
+        street: properties |> street_address()
       }
     end)
   end
 
-  defp streetAddress(properties) do
+  defp street_address(properties) do
     if Map.has_key?(properties, "housenumber") do
       Map.get(properties, "housenumber") <> " " <> Map.get(properties, "street")
     else
diff --git a/lib/service/http_signatures/http_signatures.ex b/lib/service/http_signatures/http_signatures.ex
index d718f021b..04ff0a532 100644
--- a/lib/service/http_signatures/http_signatures.ex
+++ b/lib/service/http_signatures/http_signatures.ex
@@ -49,19 +49,19 @@ defmodule Mobilizon.Service.HTTPSignatures do
   def validate_conn(conn) do
     # TODO: How to get the right key and see if it is actually valid for that request.
     # For now, fetch the key for the actor.
-    with {:ok, public_key} <- conn.params["actor"] |> Actor.get_public_key_for_url() do
-      if validate_conn(conn, public_key) do
-        true
-      else
-        Logger.info("Could not validate request, re-fetching user and trying one more time")
-        # Fetch user anew and try one more time
-        with actor_id <- conn.params["actor"],
-             {:ok, _actor} <- ActivityPub.make_actor_from_url(actor_id),
-             {:ok, public_key} <- actor_id |> Actor.get_public_key_for_url() do
-          validate_conn(conn, public_key)
+    case conn.params["actor"] |> Actor.get_public_key_for_url() do
+      {:ok, public_key} ->
+        if validate_conn(conn, public_key) do
+          true
+          Logger.info("Could not validate request, re-fetching user and trying one more time")
+          # Fetch user anew and try one more time
+          with actor_id <- conn.params["actor"],
+               {:ok, _actor} <- ActivityPub.make_actor_from_url(actor_id),
+               {:ok, public_key} <- actor_id |> Actor.get_public_key_for_url() do
+            validate_conn(conn, public_key)
+          end
         end
-      end
-    else
+
       e ->
         Logger.debug("Could not found url for actor!")
         Logger.debug(inspect(e))
@@ -104,9 +104,10 @@ defmodule Mobilizon.Service.HTTPSignatures do
   end
 
   def generate_date_header(date \\ Timex.now("GMT")) do
-    with {:ok, date} <- Timex.format(date, "%a, %d %b %Y %H:%M:%S %Z", :strftime) do
-      date
-    else
+    case Timex.format(date, "%a, %d %b %Y %H:%M:%S %Z", :strftime) do
+      {:ok, date} ->
+        date
+
       {:error, err} ->
         Logger.error("Unable to generate date header")
         Logger.error(inspect(err))
diff --git a/lib/service/web_finger/web_finger.ex b/lib/service/web_finger/web_finger.ex
index 5e765efd6..d1ac160fb 100644
--- a/lib/service/web_finger/web_finger.ex
+++ b/lib/service/web_finger/web_finger.ex
@@ -43,9 +43,10 @@ defmodule Mobilizon.Service.WebFinger do
       {:ok, represent_actor(actor, "JSON")}
     else
       _e ->
-        with {:ok, %Actor{} = actor} when not is_nil(actor) <- Actors.get_actor_by_url(resource) do
-          {:ok, represent_actor(actor, "JSON")}
-        else
+        case Actors.get_actor_by_url(resource) do
+          {:ok, %Actor{} = actor} when not is_nil(actor) ->
+            {:ok, represent_actor(actor, "JSON")}
+
           _e ->
             {:error, "Couldn't find actor"}
         end
@@ -94,9 +95,10 @@ defmodule Mobilizon.Service.WebFinger do
     actor = String.trim_leading(actor, "@")
 
     domain =
-      with [_name, domain] <- String.split(actor, "@") do
-        domain
-      else
+      case String.split(actor, "@") do
+        [_name, domain] ->
+          domain
+
         _e ->
           URI.parse(actor).host
       end
diff --git a/test/mobilizon/actors/actors_test.exs b/test/mobilizon/actors/actors_test.exs
index a6d023df0..c07c917c1 100644
--- a/test/mobilizon/actors/actors_test.exs
+++ b/test/mobilizon/actors/actors_test.exs
@@ -440,9 +440,10 @@ defmodule Mobilizon.ActorsTest do
     end
 
     test "create_bot/1 with invalid data returns error changeset" do
-      with {:error, %Ecto.Changeset{}} <- Actors.create_bot(@invalid_attrs) do
-        assert true
-      else
+      case Actors.create_bot(@invalid_attrs) do
+        {:error, %Ecto.Changeset{}} ->
+          assert true
+
         _ ->
           assert false
       end
diff --git a/test/mobilizon/events/events_test.exs b/test/mobilizon/events/events_test.exs
index 47ba8673e..29a396906 100644
--- a/test/mobilizon/events/events_test.exs
+++ b/test/mobilizon/events/events_test.exs
@@ -92,12 +92,13 @@ defmodule Mobilizon.EventsTest do
         |> Map.put(:organizer_actor_id, actor.id)
         |> Map.put(:address_id, address.id)
 
-      with {:ok, %Event{} = event} <- Events.create_event(valid_attrs) do
-        assert event.begins_on == DateTime.from_naive!(~N[2010-04-17 14:00:00Z], "Etc/UTC")
-        assert event.description == "some description"
-        assert event.ends_on == DateTime.from_naive!(~N[2010-04-17 14:00:00Z], "Etc/UTC")
-        assert event.title == "some title"
-      else
+      case Events.create_event(valid_attrs) do
+        {:ok, %Event{} = event} ->
+          assert event.begins_on == DateTime.from_naive!(~N[2010-04-17 14:00:00Z], "Etc/UTC")
+          assert event.description == "some description"
+          assert event.ends_on == DateTime.from_naive!(~N[2010-04-17 14:00:00Z], "Etc/UTC")
+          assert event.title == "some title"
+
         err ->
           flunk("Failed to create an event #{inspect(err)}")
       end
@@ -138,10 +139,11 @@ defmodule Mobilizon.EventsTest do
     test "get_public_events_for_actor/3", %{actor: actor, event: event} do
       event1 = insert(:event, organizer_actor: actor)
 
-      with {:ok, events_found, 2} <- Events.get_public_events_for_actor(actor, 1, 10) do
-        event_ids = MapSet.new(events_found |> Enum.map(& &1.id))
-        assert event_ids == MapSet.new([event.id, event1.id])
-      else
+      case Events.get_public_events_for_actor(actor, 1, 10) do
+        {:ok, events_found, 2} ->
+          event_ids = MapSet.new(events_found |> Enum.map(& &1.id))
+          assert event_ids == MapSet.new([event.id, event1.id])
+
         err ->
           flunk("Failed to get events for an actor #{inspect(err)}")
       end
@@ -150,10 +152,10 @@ defmodule Mobilizon.EventsTest do
     test "get_public_events_for_actor/3 with limited results", %{actor: actor, event: event} do
       event1 = insert(:event, organizer_actor: actor)
 
-      with {:ok, [%Event{id: event_found_id}], 2} <-
-             Events.get_public_events_for_actor(actor, 1, 1) do
-        assert event_found_id in [event.id, event1.id]
-      else
+      case Events.get_public_events_for_actor(actor, 1, 1) do
+        {:ok, [%Event{id: event_found_id}], 2} ->
+          assert event_found_id in [event.id, event1.id]
+
         err ->
           flunk("Failed to get limited events for an actor #{inspect(err)}")
       end
@@ -345,11 +347,12 @@ defmodule Mobilizon.EventsTest do
       valid_attrs = Map.put(@valid_attrs, :event_id, event.id)
       valid_attrs = Map.put(valid_attrs, :actor_id, actor.id)
 
-      with {:ok, %Participant{} = participant} <- Events.create_participant(valid_attrs) do
-        assert participant.event_id == event.id
-        assert participant.actor_id == actor.id
-        assert participant.role == :creator
-      else
+      case Events.create_participant(valid_attrs) do
+        {:ok, %Participant{} = participant} ->
+          assert participant.event_id == event.id
+          assert participant.actor_id == actor.id
+          assert participant.role == :creator
+
         err ->
           flunk("Failed to create a participant #{inspect(err)}")
       end
@@ -362,10 +365,10 @@ defmodule Mobilizon.EventsTest do
     test "update_participant/2 with valid data updates the participant", %{
       participant: participant
     } do
-      with {:ok, %Participant{} = participant} <-
-             Events.update_participant(participant, @update_attrs) do
-        assert participant.role == :moderator
-      else
+      case Events.update_participant(participant, @update_attrs) do
+        {:ok, %Participant{} = participant} ->
+          assert participant.role == :moderator
+
         err ->
           flunk("Failed to update a participant #{inspect(err)}")
       end
@@ -575,10 +578,11 @@ defmodule Mobilizon.EventsTest do
       actor = insert(:actor)
       comment_data = Map.merge(@valid_attrs, %{actor_id: actor.id})
 
-      with {:ok, %Comment{} = comment} <- Events.create_comment(comment_data) do
-        assert comment.text == "some text"
-        assert comment.actor_id == actor.id
-      else
+      case Events.create_comment(comment_data) do
+        {:ok, %Comment{} = comment} ->
+          assert comment.text == "some text"
+          assert comment.actor_id == actor.id
+
         err ->
           flunk("Failed to create a comment #{inspect(err)}")
       end
@@ -591,9 +595,10 @@ defmodule Mobilizon.EventsTest do
     test "update_comment/2 with valid data updates the comment" do
       comment = insert(:comment)
 
-      with {:ok, %Comment{} = comment} <- Events.update_comment(comment, @update_attrs) do
-        assert comment.text == "some updated text"
-      else
+      case Events.update_comment(comment, @update_attrs) do
+        {:ok, %Comment{} = comment} ->
+          assert comment.text == "some updated text"
+
         err ->
           flunk("Failed to update a comment #{inspect(err)}")
       end