Finally put tag_list_cache to rest (fixes philomena-dev/philomena#128)

lib/philomena/images.ex

@@ -54,6 +54,15 @@ defmodule Philomena.Images do
     Repo.one!(Image |> where(id: ^id) |> preload(:tags))
   end
 
+  @doc """
+  Gets the tag list for a single image.
+  """
+  def tag_list(%Image{tags: tags}) do
+    tags
+    |> Tag.display_order()
+    |> Enum.map_join(", ", & &1.name)
+  end
+
   @doc """
   Creates a image.
 

lib/philomena/scrapers/tumblr.ex

@@ -22,9 +22,7 @@ defmodule Philomena.Scrapers.Tumblr do
     [post_id] = Regex.run(@url_regex, url, capture: :all_but_first)
 
     api_url =
-      "https://api.tumblr.com/v2/blog/#{uri.host}/posts/photo?id=#{post_id}&api_key=#{
-        tumblr_api_key()
-      }"
+      "https://api.tumblr.com/v2/blog/#{uri.host}/posts/photo?id=#{post_id}&api_key=#{tumblr_api_key()}"
 
     Philomena.Http.get(api_url)
     |> json!()

lib/philomena_web/controllers/image_controller.ex

@@ -95,7 +95,7 @@ defmodule PhilomenaWeb.ImageController do
       interactions: interactions,
       watching: watching,
       layout_class: "layout--wide",
-      title: "##{image.id} - #{image.tag_list_cache}"
+      title: "##{image.id} - #{Images.tag_list(image)}"
     ]
 
     if image.hidden_from_users do

lib/philomena_web/templates/api/rss/watched/index.html.eex

@@ -8,10 +8,10 @@
 
     <%= for image <- @images do %>
         <item>
-          <title>#<%= image.id %> - <%= image.tag_list_cache %></title>
+          <title>#<%= image.id %> - <%= tag_list(image) %></title>
           <description>
             <![CDATA[
-              <% mouseovertext = "Size: #{image.image_width}x#{image.image_height} | Tagged: #{image.tag_list_cache}" %>
+              <% mouseovertext = "Size: #{image.image_width}x#{image.image_height} | Tagged: #{tag_list(image)}" %>
               <a href="<%= Routes.image_url(@conn, :show, image) %>">
                 <img src="<%= medium_url(image) %>" alt="<%= mouseovertext %>" title="<%= mouseovertext %>"/>
               </a>

lib/philomena_web/templates/layout/_opengraph.html.slime

@@ -5,9 +5,9 @@ meta name="format-detection" content="telephone=no"
 = if opengraph?(@conn) do
   - image = @conn.assigns.image
   - filtered = not image.thumbnails_generated
-  - description = "##{image.id} - #{image.tag_list_cache} - Derpibooru"
+  - description = "##{image.id} - #{Philomena.Images.tag_list(image)} - Derpibooru"
 
-  meta name="keywords" content=image.tag_list_cache
+  meta name="keywords" content=tag_list(image)
   meta name="description" content=description
   meta property="og:title" content=description
   meta property="og:url" content=Routes.image_url(@conn, :show, image)

lib/philomena_web/views/api/json/oembed_view.ex

@@ -11,7 +11,7 @@ defmodule PhilomenaWeb.Api.Json.OembedView do
     %{
       version: "1.0",
       type: "photo",
-      title: "##{image.id} - #{image.tag_list_cache} - Derpibooru",
+      title: "##{image.id} - #{tag_list(image)} - Derpibooru",
       author_url: image.source_url || "",
       author_name: artist_tags(image.tags),
       provider_name: "Derpibooru",

lib/philomena_web/views/app_view.ex

@@ -43,6 +43,10 @@ defmodule PhilomenaWeb.AppView do
     )
   end
 
+  def tag_list(image) do
+    Philomena.Images.tag_list(image)
+  end
+
   def distance_of_time_in_words(time_2, time_1) do
     seconds = abs(DateTime.diff(time_2, time_1, :second))
     minutes = div(seconds, 60)

lib/philomena_web/views/avatar_generator_view.ex

@@ -58,10 +58,10 @@ defmodule PhilomenaWeb.AvatarGeneratorView do
   # 32-bit xorshift deterministic PRNG
   defp xorshift32(state) do
     state = state &&& 0xFFFF_FFFF
-    state = bxor(state, (state <<< 13))
-    state = bxor(state, (state >>> 17))
+    state = bxor(state, state <<< 13)
+    state = bxor(state, state >>> 17)
 
-    bxor(state, (state <<< 5))
+    bxor(state, state <<< 5)
   end
 
   # Generate pseudorandom, clamped RGB values with a specified

mix.exs

@@ -55,7 +55,8 @@ defmodule Philomena.MixProject do
       {:nimble_parsec, "~> 1.1"},
       {:canary, "~> 1.1"},
       {:scrivener_ecto, "~> 2.7"},
-      {:pbkdf2, "~> 2.0", github: "code-time/erlang-pbkdf2", ref: "f8f0012a97f58ade9c70ac93260e4259e4ca4b8d"},
+      {:pbkdf2, "~> 2.0",
+       github: "code-time/erlang-pbkdf2", ref: "f8f0012a97f58ade9c70ac93260e4259e4ca4b8d"},
       {:qrcode, "~> 0.1"},
       {:redix, "~> 0.10.0"},
       {:bamboo, "~> 1.6"},