rss api

lib/philomena_web/controllers/api/watched_controller.ex

@@ -0,0 +1,34 @@
+defmodule PhilomenaWeb.Api.WatchedController do
+  use PhilomenaWeb, :controller
+
+  alias Philomena.Images.{Image, Query}
+  import Ecto.Query
+
+  def index(conn, _params) do
+    user = conn.assigns.current_user
+    filter = conn.assigns.compiled_filter
+
+    {:ok, query} = Query.compile(user, "my:watched")
+
+    images =
+      Image.search_records(
+        %{
+          query: %{
+            bool: %{
+              must: query,
+              must_not: [
+                filter,
+                %{term: %{hidden_from_users: true}}
+              ]
+            }
+          },
+          sort: %{created_at: :desc}
+        },
+        conn.assigns.image_pagination,
+        Image |> preload(:tags)
+      )
+
+    conn
+    |> render("index.rss", images: images)
+  end
+end

lib/philomena_web/plugs/api_token_plug.ex

@@ -0,0 +1,32 @@
+defmodule PhilomenaWeb.ApiTokenPlug do
+
+  alias Philomena.Users.User
+  alias Philomena.Repo
+  alias Pow.Plug
+  import Ecto.Query
+
+  def init([]), do: []
+
+  def call(conn, _opts) do
+    conn
+    |> maybe_find_user(conn.params["key"])
+    |> maybe_assign_user()
+  end
+
+  defp maybe_find_user(conn, nil), do: {conn, nil}
+  defp maybe_find_user(conn, key) do
+    user =
+      User
+      |> where(authentication_token: ^key)
+      |> Repo.one()
+
+    {conn, user}
+  end
+
+  defp maybe_assign_user({conn, nil}), do: conn
+  defp maybe_assign_user({conn, user}) do
+    config = Plug.fetch_config(conn)
+
+    Plug.assign_current_user(conn, user, config)
+  end
+end

lib/philomena_web/router.ex

@@ -21,6 +21,18 @@ defmodule PhilomenaWeb.Router do
     plug PhilomenaWeb.ChannelPlug
   end
 
+  pipeline :rss do
+    plug :accepts, ["rss"]
+
+    plug PhilomenaWeb.ApiTokenPlug
+    plug Pow.Plug.RequireAuthenticated,
+      error_handler: Pow.Phoenix.PlugErrorHandler
+    plug PhilomenaWeb.EnsureUserEnabledPlug
+    plug PhilomenaWeb.CurrentFilterPlug
+    plug PhilomenaWeb.ImageFilterPlug
+    plug PhilomenaWeb.PaginationPlug
+  end
+
   pipeline :api do
     plug :accepts, ["json"]
   end
@@ -54,6 +66,12 @@ defmodule PhilomenaWeb.Router do
     end
   end
 
+  scope "/api/rss", PhilomenaWeb.Api, as: :api_rss do
+    pipe_through :rss
+
+    resources "/watched", WatchedController, only: [:index]
+  end
+
   scope "/", PhilomenaWeb do
     pipe_through [:browser, :ensure_totp, :protected]
 

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

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
+<rss version="2.0">
+  <channel>
+    <title>Derpibooru Watchlist</title>
+    <description>Your watched tags feed from Derpibooru</description>
+    <link><%= Routes.api_rss_watched_url(@conn, :index) %></link>
+    <lastBuildDate><%= last_build_date() %></lastBuildDate>
+
+    <%= for image <- @images do %>
+        <item>
+          <title><%= "##{image.id} - #{image.tag_list_cache}" %></title>
+          <description>
+            <![CDATA[
+              <% mouseovertext = "Size: #{image.image_width}x#{image.image_height} | Tagged: #{image.tag_list_cache}" %>
+              <a href="<%= Routes.image_url(@conn, :show, image) %>">
+                <img src="https:<%= medium_url(image) %>" alt="<%= mouseovertext %>" title="<%= mouseovertext %>"/>
+              </a>
+            ]]>
+          </description>
+          <pubDate><%= NaiveDateTime.to_iso8601(image.created_at) %></pubDate>
+          <link><%= Routes.image_url(@conn, :show, image) %></link>
+          <guid><%= Routes.image_url(@conn, :show, image) %></guid>
+        </item>
+    <% end %>
+  </channel>
+</rss>

lib/philomena_web/templates/setting/edit.html.slime

@@ -38,6 +38,14 @@ h1 Content Settings
           => checkbox f, :no_spoilered_in_watched, class: "checkbox"
           => label f, :no_spoilered_in_watched, "Hide images spoilered by filter in watchlist"
 
+        h4 Other
+        p
+          ' RSS feed link (for Google Reader, Thunderbird, etc.):
+          br
+          = url_input f, :subscribe_url, value: Routes.api_rss_watched_url(@conn, :index, key: @conn.assigns.current_user.authentication_token), class: "input input--wide"
+          br
+          ' Do not share this URL with anyone, it may allow an attacker to compromise your account.
+
       .block__tab.hidden.flex.flex--maybe-wrap data-tab="display"
         div
           .field

lib/philomena_web/views/api/watched_view.ex

@@ -0,0 +1,16 @@
+defmodule PhilomenaWeb.Api.WatchedView do
+  use PhilomenaWeb, :view
+
+  alias PhilomenaWeb.ImageView
+
+  def last_build_date do
+    DateTime.utc_now()
+    |> DateTime.to_iso8601()
+  end
+
+  def medium_url(image) do
+    image
+    |> ImageView.thumb_urls(false)
+    |> Map.get(:medium)
+  end
+end