copy and customize filters

lib/philomena_web/controllers/filter_controller.ex

@@ -58,6 +58,30 @@ defmodule PhilomenaWeb.FilterController do
     )
   end
 
+  def new(conn, %{"based_on" => filter_id}) do
+    # The last line here is a hack to get Ecto to save a new
+    # model instead of trying to update the existing one.
+    filter =
+      Filter
+      |> where(id: ^filter_id)
+      |> where(
+        [f],
+        f.system == true or f.public == true or f.user_id == ^conn.assigns.current_user.id
+      )
+      |> Repo.one()
+      |> Kernel.||(%Filter{})
+      |> TagList.assign_tag_list(:spoilered_tag_ids, :spoilered_tag_list)
+      |> TagList.assign_tag_list(:hidden_tag_ids, :hidden_tag_list)
+      |> Map.put(:__meta__, %Ecto.Schema.Metadata{
+        state: :built,
+        source: "filters",
+        schema: Filter
+      })
+
+    changeset = Filters.change_filter(filter)
+    render(conn, "new.html", title: "New Filter", changeset: %{changeset | action: nil})
+  end
+
   def new(conn, _params) do
     changeset = Filters.change_filter(%Filter{})
     render(conn, "new.html", title: "New Filter", changeset: changeset)

lib/philomena_web/templates/filter/_filter.html.slime

@@ -21,6 +21,8 @@
 
       li
         = link "View this filter", to: Routes.filter_path(@conn, :show, @filter), class: "button"
+      li
+        = link "Copy and Customize", to: Routes.filter_path(@conn, :new, based_on: @filter), class: "button"
 
       = if can?(@conn, :edit, @filter) do
         li

lib/philomena_web/templates/filter/_form.html.slime

@@ -1,5 +1,6 @@
 .form
   = form_for @filter, @route, fn f ->
+    - IO.inspect @filter.data
     = if @filter.action do
       #error_explanation
         ' Oops, something went wrong! Please check the errors below.

lib/philomena_web/templates/profile/_commission.html.slime

@@ -9,9 +9,9 @@
         strong> Price Range:
         - {min, max} = Enum.min_max_by(@user.commission.items, & &1.base_price)
         | $
-        => Decimal.round(min.base_price, 2) |> Decimal.to_string()
+        => Decimal.round(min.base_price || 0, 2) |> Decimal.to_string()
         | - $
-        => Decimal.round(max.base_price, 2) |> Decimal.to_string()
+        => Decimal.round(max.base_price || 0, 2) |> Decimal.to_string()
         ' USD
         br