Update visual indicator for CSV downloads

app/controllers/application_controller.rb

@@ -146,6 +146,15 @@ def setup_date_range_picker
     @selected_date_range_label = helpers.date_range_label
   end
 
+  def handle_csv_export
+    return unless params[:export_csv]
+
+    session[:trigger_csv_download] = true
+    clean_params = request.query_parameters.except("export_csv")
+    redirect_url = clean_params.any? ? "#{request.path}?#{clean_params.to_query}" : request.path
+    redirect_to redirect_url
+  end
+
   def configure_permitted_parameters
     devise_parameter_sanitizer.permit(:account_update, keys: [:name])
   end

app/controllers/distributions_controller.rb

@@ -9,6 +9,7 @@ class DistributionsController < ApplicationController
   include Validatable
 
   before_action :enable_turbo!, only: %i[new show]
+  before_action :handle_csv_export, only: [:index]
   skip_before_action :authenticate_user!, only: %i(calendar)
   skip_before_action :authorize_user, only: %i(calendar)
   skip_before_action :require_organization, only: %i(calendar)

app/javascript/controllers/toast_controller.js

@@ -0,0 +1,26 @@
+import { Controller } from "@hotwired/stimulus"
+
+// Connects to data-controller="toast"
+// Shows a toastr notification when the element is rendered.
+//
+// Usage:
+//   <div data-controller="toast" data-toast-message-value="Hello!" data-toast-type-value="info"></div>
+//
+export default class extends Controller {
+  static values = {
+    message: String,
+    type: { type: String, default: "info" },
+    timeout: { type: Number, default: 5000 },
+    position: { type: String, default: "toast-top-center" }
+  }
+
+  connect() {
+    const previousTimeout = toastr.options.timeOut;
+    const previousPosition = toastr.options.positionClass;
+    toastr.options.timeOut = this.timeoutValue;
+    toastr.options.positionClass = this.positionValue;
+    toastr[this.typeValue](this.messageValue);
+    toastr.options.timeOut = previousTimeout;
+    toastr.options.positionClass = previousPosition;
+  }
+}

app/views/distributions/index.html.erb

@@ -71,7 +71,7 @@
                   <%=
                     if @distributions.any?
                       download_button_to(
-                        distributions_path(format: :csv, filters: filter_params.merge(date_range: date_range_params)),
+                        distributions_path(export_csv: true, filters: filter_params.merge(date_range: date_range_params)),
                         text: "Export Distributions"
                       )
                     end
@@ -152,3 +152,5 @@
     </div>
   </div>
 </section>
+
+<%= render "shared/csv_download" %>

app/views/shared/_csv_download.html.erb

@@ -0,0 +1,5 @@
+<% if session.delete(:trigger_csv_download) %>
+  <% csv_url = "#{request.path}.csv#{"?#{request.query_string}" if request.query_string.present?}" %>
+  <iframe src="<%= csv_url %>" class="d-none"></iframe>
+  <div data-controller="toast" data-toast-message-value="Your CSV export is downloading!" class="d-none"></div>
+<% end %>