rubocop suggestion changes in images_controller (#11436)

* First time contributor - rubocop suggestion changes in images_controller.rb

#11432 first timer issue
Fixes rubocop suggestions, according to issue a issue linked above

* Update images_controller.rb

Co-authored-by: Tilda Udufo <mathildaudufo@gmail.com>

app/controllers/images_controller.rb

@@ -6,18 +6,18 @@ class ImagesController < ApplicationController
 
   def shortlink
     size = params[:size] || params[:s]
-    size = size || :large
-    size = :thumb if (size.to_s == "t")
-    size = :thumb if (size.to_s == "thumbnail")
-    size = :medium if (size.to_s == "m")
-    size = :large if (size.to_s == "l")
-    size = :original if (size.to_s == "o")
+    size ||= :large
+    size = :thumb if size.to_s == 't'
+    size = :thumb if size.to_s == 'thumbnail'
+    size = :medium if size.to_s == 'm'
+    size = :large if size.to_s == 'l'
+    size = :original if size.to_s == 'o'
     image = Image.find(params[:id])
-    if image.is_image?
-      path = URI.parse(image.path(size)).path
-    else
-      path = URI.parse(image.path(:original)).path # PDFs etc don't get resized
-    end
+    path = if image.is_image?
+             URI.parse(image.path(size)).path
+           else
+             URI.parse(image.path(:original)).path # PDFs etc don't get resized
+           end
     redirect_to path
   end
 
@@ -30,25 +30,25 @@ def create
       filetype = params[:data].split(';').first.split('/').last
       @image = Image.new(uid: current_user.uid,
                          photo: params[:data],
-                         photo_file_name: 'dataurl.' + filetype)
+                         photo_file_name: "dataurl.#{filetype}")
       @image.save!
     else
       @image = Image.new(uid: current_user.uid,
                          photo: params[:image][:photo],
                          title: params[:image][:title],
                          notes: params[:image][:notes])
     end
-    @image.nid = Node.find(params[:nid].to_i).nid unless params[:nid].nil? || params[:nid] == 'undefined' || params[:nid].to_i == 0
+    @image.nid = Node.find(params[:nid].to_i).nid unless params[:nid].nil? || params[:nid] == 'undefined' || params[:nid].to_i.zero?
     if @image.save!
       render json: {
         id: @image.id,
         url: @image.shortlink,
-        full: 'https://' + request.host.to_s + '/' + @image.path(:large),
+        full: "https://#{request.host}/#{@image.path(:large)}",
         filename: @image.photo_file_name,
         href: @image.shortlink, # Woofmark/PublicLab.Editor
         title: @image.photo_file_name,
         results: [{ # Woofmark/PublicLab.Editor
-          href: @image.shortlink + "." + @image.filetype,
+          href: "#{@image.shortlink}.#{@image.filetype}",
           title: @image.photo_file_name
         }]
       }