Migrate assets to use Webpacker

app/javascript/src/javascripts/favorites.js

@@ -0,0 +1,65 @@
+import Post from './posts.js.erb'
+import Utility from './utility'
+
+let Favorite = {}
+
+Favorite.initialize_all = function() {
+  if ($("#c-posts").length) {
+    this.hide_or_show_add_to_favorites_link();
+  }
+}
+
+Favorite.hide_or_show_add_to_favorites_link = function() {
+  var current_user_id = Utility.meta("current-user-id");
+  if (current_user_id == "") {
+    $("#add-to-favorites").hide();
+    $("#remove-from-favorites").hide();
+    $("#add-fav-button").hide();
+    $("#remove-fav-button").hide();
+    return;
+  }
+  if ($("#image-container").length && $("#image-container").data("is-favorited") == true) {
+    $("#add-to-favorites").hide();
+    $("#add-fav-button").hide();
+  } else {
+    $("#remove-from-favorites").hide();
+    $("#remove-fav-button").hide();
+  }
+}
+
+Favorite.create = function(post_id) {
+  Post.notice_update("inc");
+
+  $.ajax({
+    type: "POST",
+    url: "/favorites.js",
+    data: {
+      post_id: post_id
+    },
+    complete: function() {
+      Post.notice_update("dec");
+    },
+    error: function(data, status, xhr) {
+      Utility.notice("Error: " + data.reason);
+    }
+  });
+}
+
+Favorite.destroy = function(post_id) {
+  Post.notice_update("inc");
+
+  $.ajax({
+    type: "DELETE",
+    url: "/favorites/" + post_id + ".js",
+    complete: function() {
+      Post.notice_update("dec");
+    }
+  });
+}
+
+$(document).ready(function() {
+  Favorite.initialize_all();
+});
+
+export default Favorite
+