add changeset_errors/1 helper to form components

lib/cannery_web/views/error_helpers.ex

@@ -4,22 +4,32 @@ defmodule CanneryWeb.ErrorHelpers do
   """
 
   use Phoenix.HTML
+  import Phoenix.LiveView.Helpers
+  alias Phoenix.{HTML.Form, LiveView.Rendered}
+  alias Ecto.Changeset
 
   @doc """
   Generates tag for inlined form input errors.
   """
-  def error_tag(form, field) do
-    Enum.map(Keyword.get_values(form.errors, field), fn error ->
-      content_tag(:span, translate_error(error),
-        class: "invalid-feedback",
-        phx_feedback_for: input_name(form, field)
-      )
-    end)
+  @spec error_tag(Form.t(), Form.field()) :: Rendered.t()
+  @spec error_tag(Form.t(), Form.field(), String.t()) :: Rendered.t()
+  def error_tag(form, field, extra_class \\ "") do
+    assigns = %{extra_class: extra_class, form: form, field: field}
+
+    ~H"""
+      <%= for error <- Keyword.get_values(@form.errors, @field) do %>
+        <span class={"invalid-feedback #{@extra_class}"}
+          phx-feedback-for={input_name(@form, @field)}>
+          <%= translate_error(error) %>
+        </span>
+      <% end %>
+    """
   end
 
   @doc """
   Translates an error message using gettext.
   """
+  @spec translate_error({String.t(), keyword() | map()}) :: String.t()
   def translate_error({msg, opts}) do
     # When using gettext, we typically pass the strings we want
     # to translate as a static argument:
@@ -44,4 +54,16 @@ defmodule CanneryWeb.ErrorHelpers do
       Gettext.dgettext(CanneryWeb.Gettext, "errors", msg, opts)
     end
   end
+
+  @doc """
+  Displays all errors from a changeset
+  """
+  @spec changeset_errors(Changeset.t()) :: String.t()
+  def changeset_errors(changeset) do
+    changeset
+    |> Changeset.traverse_errors(fn error -> error |> translate_error() end)
+    |> Enum.map_join(". ", fn {key, errors} ->
+      "#{key |> humanize()}: #{errors |> Enum.join(", ")}"
+    end)
+  end
 end