Expose maximum picture sizes

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/graphql/resolvers/config.ex

@@ -134,6 +134,11 @@ defmodule Mobilizon.GraphQL.Resolvers.Config do
       auth: %{
         ldap: Config.ldap_enabled?(),
         oauth_providers: Config.oauth_consumer_strategies()
+      },
+      upload_limits: %{
+        default: Config.get([:instance, :upload_limit]),
+        avatar: Config.get([:instance, :avatar_upload_limit]),
+        banner: Config.get([:instance, :banner_upload_limit])
       }
     }
   end

lib/graphql/schema/config.ex

@@ -33,6 +33,8 @@ defmodule Mobilizon.GraphQL.Schema.ConfigType do
       description: "The instance's enabled resource providers"
     )
 
+    field(:upload_limits, :upload_limits, description: "The configuration for upload limits")
+
     field(:timezones, list_of(:string), description: "The instance's available timezones")
     field(:features, :features, description: "The instance's features")
     field(:version, :string, description: "The instance's version")
@@ -283,6 +285,15 @@ defmodule Mobilizon.GraphQL.Schema.ConfigType do
     field(:label, :string, description: "The label for the auth provider")
   end
 
+  @desc """
+  An upload limits configuration
+  """
+  object :upload_limits do
+    field(:default, :integer, description: "The default limitation, in bytes")
+    field(:avatar, :integer, description: "The avatar limitation, in bytes")
+    field(:banner, :integer, description: "The banner limitation, in bytes")
+  end
+
   object :config_queries do
     @desc "Get the instance config"
     field :config, :config do

lib/web/endpoint.ex

@@ -62,9 +62,12 @@ defmodule Mobilizon.Web.Endpoint do
   plug(Plug.RequestId)
   plug(Plug.Logger)
 
+  upload_limit =
+    Keyword.get(Application.get_env(:mobilizon, :instance, []), :upload_limit, 10_485_760)
+
   plug(
     Plug.Parsers,
-    parsers: [:urlencoded, {:multipart, length: 10_000_000}, :json, Absinthe.Plug.Parser],
+    parsers: [:urlencoded, {:multipart, length: upload_limit}, :json, Absinthe.Plug.Parser],
     pass: ["*/*"],
     json_decoder: Jason
   )