Show explicit messages when karma is too low to write contents

app/controllers/application_controller.rb

@@ -17,6 +17,11 @@ def error_403
     render file: "#{Rails.public_path}/errors/403.html", status: 403, layout: false
   end
 
+  def not_enough_karma(content_type)
+    @content_type = content_type
+    render 'users/not_enough_karma', status: 403
+  end
+
   def seo_filter
     request.session_options[:secure] = request.ssl?
     headers["X-Served-By"] = Process.pid.to_s

app/controllers/diaries_controller.rb

@@ -19,11 +19,13 @@ def index
   def new
     @diary = current_user.diaries.build
     @diary.cc_licensed = true
+    return not_enough_karma('journaux') unless @diary.creatable_by?(current_account)
     enforce_create_permission(@diary)
   end
 
   def create
     @diary = current_user.diaries.build
+    return not_enough_karma('journaux') unless @diary.creatable_by?(current_account)
     enforce_create_permission(@diary)
     @diary.attributes = diary_params
     if !preview_mode && @diary.save

app/controllers/wiki_pages_controller.rb

@@ -34,13 +34,15 @@ def show
   def new
     @wiki_page = WikiPage.new
     @wiki_page.title = params[:title]
+    return not_enough_karma('pages de wiki') unless @wiki_page.creatable_by?(current_account)
     enforce_create_permission(@wiki_page)
   end
 
   def create
     @wiki_page = WikiPage.new
     @wiki_page.attributes = wiki_params :title
     @wiki_page.user_id = current_account.user_id
+    return not_enough_karma('pages de wiki') unless @wiki_page.creatable_by?(current_account)
     enforce_create_permission(@wiki_page)
     if !preview_mode && @wiki_page.save
       redirect_to @wiki_page, notice: "Nouvelle page de wiki créée"
@@ -53,10 +55,12 @@ def create
 
   def edit
     @wiki_page.wiki_body = @wiki_page.versions.first.body
+    return not_enough_karma('pages de wiki') unless @wiki_page.updatable_by?(current_account)
     enforce_update_permission(@wiki_page)
   end
 
   def update
+    return not_enough_karma('pages de wiki') unless @wiki_page.updatable_by?(current_account)
     enforce_update_permission(@wiki_page)
     @wiki_page.attributes = wiki_params
     @wiki_page.user_id = current_account.user_id

app/views/users/not_enough_karma.html.haml

@@ -0,0 +1,5 @@
+=h1 "Karma insuffisant"
+%p
+  En raison d'un #{link_to "karma trop faible", "/aide#aide-karma"},
+  ce compte n'est pas actuellement autorisé à écrire des #{@content_type} sur le site.
+%img(src="/images/403.png" alt="")