scrivener

lib/philomena/elasticsearch.ex

@@ -9,6 +9,7 @@ defmodule Philomena.Elasticsearch do
     quote do
       alias Philomena.Repo
       import Ecto.Query, warn: false
+      require Logger
 
       def create_index! do
         Elastix.Index.create(
@@ -81,7 +82,11 @@ defmodule Philomena.Elasticsearch do
         reindex(ecto_query, batch_size, ids)
       end
 
-      def search_results(elastic_query) do
+      def search_results(elastic_query, pagination_params \\ %{}) do
+        page_number = pagination_params[:page_number] || 1
+        page_size = pagination_params[:page_size] || 25
+        elastic_query = Map.merge(elastic_query, %{from: (page_number - 1) * page_size, size: page_size, _source: false})
+
         {:ok, %{body: results, status_code: 200}} =
           Elastix.Search.search(
             unquote(elastic_url),
@@ -90,16 +95,32 @@ defmodule Philomena.Elasticsearch do
             elastic_query
           )
 
-        results
+        time = results["took"]
+        count = results["hits"]["total"]
+        entries = results["hits"]["hits"] |> Enum.map(&String.to_integer(&1["_id"]))
+
+        Logger.debug("[Elasticsearch] Query took #{time}ms")
+
+        %Scrivener.Page{
+          entries: entries,
+          page_number: page_number,
+          page_size: page_size,
+          total_entries: count,
+          total_pages: div(count + page_size - 1, page_size)
+        }
       end
 
-      def search_records(elastic_query, ecto_query \\ __MODULE__) do
-        results = search_results(elastic_query)
+      def search_records(elastic_query, pagination_params \\ %{}, ecto_query \\ __MODULE__) do
+        page = search_results(elastic_query, pagination_params)
+        ids = page.entries
 
-        ids = results["hits"]["hits"] |> Enum.map(&String.to_integer(&1["_id"]))
-        records = ecto_query |> where([m], m.id in ^ids) |> Repo.all()
+        records =
+          ecto_query
+          |> where([m], m.id in ^ids)
+          |> Repo.all()
+          |> Enum.sort_by(&Enum.find_index(ids, fn el -> el == &1.id end))
 
-        records |> Enum.sort_by(&Enum.find_index(ids, fn el -> el == &1.id end))
+        %{page | entries: records}
       end
     end
   end

lib/philomena/repo.ex

@@ -2,4 +2,6 @@ defmodule Philomena.Repo do
   use Ecto.Repo,
     otp_app: :philomena,
     adapter: Ecto.Adapters.Postgres
+
+  use Scrivener, page_size: 250
 end

lib/philomena_web/controllers/activity_controller.ex

@@ -19,9 +19,9 @@ defmodule PhilomenaWeb.ActivityController do
               must: image_query
             }
           },
-          size: 25,
           sort: %{created_at: :desc}
         },
+        %{page_number: 1, page_size: 25},
         Image |> preload([:tags])
       )
 
@@ -34,10 +34,9 @@ defmodule PhilomenaWeb.ActivityController do
               must: %{range: %{first_seen_at: %{gt: "now-3d"}}}
             }
           },
-          size: 4,
-          from: :rand.uniform(26) - 1,
           sort: [%{score: :desc}, %{first_seen_at: :desc}]
         },
+        %{page_number: :rand.uniform(6), page_size: 4},
         Image |> preload([:tags])
       )
 
@@ -55,9 +54,9 @@ defmodule PhilomenaWeb.ActivityController do
               ]
             }
           },
-          size: 6,
           sort: %{posted_at: :desc}
         },
+        %{page_number: 1, page_size: 6},
         Comment |> preload([:user, :image])
       )
 
@@ -72,9 +71,9 @@ defmodule PhilomenaWeb.ActivityController do
               must: watched_query
             }
           },
-          size: 25,
           sort: %{created_at: :desc}
         },
+        %{page_number: 1, page_size: 25},
         Image |> preload([:tags])
       )
     end

lib/philomena_web/controllers/image_controller.ex

@@ -16,6 +16,7 @@ defmodule PhilomenaWeb.ImageController do
           query: %{bool: %{must_not: [query, %{term: %{hidden_from_users: true}}]}},
           sort: %{created_at: :desc}
         },
+        conn.assigns.pagination,
         Image |> preload([:tags, :user])
       )
 

lib/philomena_web/controllers/search_controller.ex

@@ -17,6 +17,7 @@ defmodule PhilomenaWeb.SearchController do
             query: %{bool: %{must: query, must_not: [filter, %{term: %{hidden_from_users: true}}]}},
             sort: %{created_at: :desc}
           },
+          conn.assigns.pagination,
           Image |> preload(:tags)
         )
 

lib/philomena_web/controllers/tag_controller.ex

@@ -14,6 +14,7 @@ defmodule PhilomenaWeb.TagController do
           size: 250,
           sort: [%{images: :desc}, %{name: :asc}]
         },
+        %{conn.assigns.pagination | page_size: 250},
         Tag
       )
 
@@ -36,6 +37,7 @@ defmodule PhilomenaWeb.TagController do
           },
           sort: %{created_at: :desc}
         },
+        conn.assigns.pagination,
         Image |> preload([:tags, :user])
       )
 

lib/philomena_web/plugs/pagination.ex

@@ -0,0 +1,35 @@
+defmodule PhilomenaWeb.Plugs.Pagination do
+  import Plug.Conn
+
+  # No options
+  def init([]), do: false
+
+  # Assign pagination info
+  def call(conn, _opts) do
+    conn = conn |> fetch_query_params()
+    params = conn.params
+
+    page_number =
+      case Integer.parse(params["page"] |> to_string()) do
+        {int, _rest} ->
+          int
+        _ ->
+          1
+      end
+
+    page_number = page_number |> max(1)
+
+    page_size =
+      case Integer.parse(params["per_page"] |> to_string()) do
+        {int, _rest} ->
+          int
+        _ ->
+          25
+      end
+
+    page_size = page_size |> max(1) |> min(50)
+
+    conn
+    |> assign(:pagination, %{page_number: page_number, page_size: page_size})
+  end
+end

lib/philomena_web/router.ex

@@ -9,6 +9,7 @@ defmodule PhilomenaWeb.Router do
     plug :protect_from_forgery
     plug :put_secure_browser_headers
     plug PhilomenaWeb.Plugs.ImageFilter
+    plug PhilomenaWeb.Plugs.Pagination
   end
 
   pipeline :api do
@@ -26,6 +27,7 @@ defmodule PhilomenaWeb.Router do
 
     get "/", ActivityController, :index
 
+    resources "/activity", ActivityController, only: [:index]
     resources "/images", ImageController, only: [:index, :show]
     resources "/tags", TagController, only: [:index, :show]
     resources "/search", SearchController, only: [:index]

lib/philomena_web/templates/activity/index.html.slime

@@ -38,7 +38,7 @@
         ' Most Commented-on Images
 
   .column-layout__main
-    = render PhilomenaWeb.ImageView, "index.html", images: @images, size: :thumb
+    = render PhilomenaWeb.ImageView, "index.html", conn: @conn, images: @images, size: :thumb
     = if !!@watched and @watched != [] do
       .block
         .block__header
@@ -49,4 +49,4 @@
             span.hide-mobile
               ' Browse Watched Images
         .block__content.js-resizable-media-container
-          = render PhilomenaWeb.ImageView, "index.html", images: @watched, size: :thumb_small
+          = render PhilomenaWeb.ImageView, "index.html", conn: @conn, images: @watched, size: :thumb_small

lib/philomena_web/templates/image/index.html.slime

@@ -1,4 +1,25 @@
+- header = assigns[:header] || ""
+- route = assigns[:route] || fn p -> Routes.image_path(@conn, :index, p) end
+- pagination = render PhilomenaWeb.PaginationView, "_pagination.html", page: @images, route: route
+- info = render PhilomenaWeb.PaginationView, "_pagination_info.html", page: @images
+
 .block#imagelist-container
+  section.block__header.flex
+    h1.block__header__title.hide-mobile
+      => header
+    = pagination
+
   .block__content.js-resizable-media-container
     = for image <- @images do
-      = render PhilomenaWeb.ImageView, "_image_box.html", image: image, size: assigns[:size] || :thumb
+      = render PhilomenaWeb.ImageView, "_image_box.html", image: image, size: assigns[:size] || :thumb
+
+  .block__header.block__header--light.flex
+    = pagination
+
+    span.block__header__title
+      = info
+    .flex__right
+      a href="/settings/edit" title="Display Settings"
+        i.fa.fa-cog
+        span.hide-mobile.hide-limited-desktop<>
+          ' Display Settings

lib/philomena_web/templates/pagination/_pagination.html.slime

@@ -0,0 +1,27 @@
+- params = assigns[:params] || []
+
+= if @page.total_pages > 1 do
+  nav.pagination
+    = if not first_page?(@page) do
+      = link("« First", to: first_page_path(@page, @route, params))
+      = link("‹ Prev", to: prev_page_path(@page, @route, params))
+
+    = if left_gap?(@page) do
+      span.page.gap
+        ' …
+
+    = for number <- left_page_numbers(@page) do
+      = link(number, to: page_path(@route, params, number))
+
+    span.page-current = @page.page_number
+
+    = for number <- right_page_numbers(@page) do
+      = link(number, to: page_path(@route, params, number))
+
+    = if right_gap?(@page) do
+      span.page.gap
+        ' …
+
+    = if not last_page?(@page) do
+      = link("Next ›", to: next_page_path(@page, @route, params))
+      = link("Last »", to: last_page_path(@page, @route, params))

lib/philomena_web/templates/pagination/_pagination_info.html.slime

@@ -0,0 +1,13 @@
+' Showing
+= if @page.total_entries == 1 do
+  ' result
+- else
+  ' results
+strong
+  => max(((@page.page_number - 1) * @page.page_size) - 1, 1)
+  ' -
+  => min(@page.page_number * @page.page_size, @page.total_entries)
+' of
+strong
+  => @page.total_entries
+' total

lib/philomena_web/templates/tag/index.html.slime

@@ -1 +1,6 @@
-= render PhilomenaWeb.TagView, "_tag_list.html", tags: @tags
+= render PhilomenaWeb.TagView, "_tag_list.html", tags: @tags
+  .block
+    .block__header.block__header--light.flex
+      = render PhilomenaWeb.PaginationView, "_pagination.html", page: @tags, route: fn p -> Routes.tag_path(@conn, :index, p) end
+      span.block__header__title
+        = render PhilomenaWeb.PaginationView, "_pagination_info.html", page: @tags

lib/philomena_web/views/pagination_view.ex

@@ -0,0 +1,46 @@
+defmodule PhilomenaWeb.PaginationView do
+  use PhilomenaWeb, :view
+
+  def first_page?(page) do
+    page.page_number == 1
+  end
+
+  def last_page?(page) do
+    page.page_number == page.total_pages
+  end
+
+  def page_path(route, params, number) do
+    route.(Keyword.merge(params, page: number))
+  end
+
+  def first_page_path(_page, route, params), do: page_path(route, params, 1)
+  def prev_page_path(page, route, params), do: page_path(route, params, page.page_number - 1)
+  def next_page_path(page, route, params), do: page_path(route, params, page.page_number + 1)
+  def last_page_path(page, route, params), do: page_path(route, params, page.total_pages)
+
+  def left_gap?(page) do
+    page.page_number >= 5
+  end
+
+  def left_page_numbers(page) do
+    number = page.page_number
+    min = 1
+    max = page.total_pages
+
+    (number - 5..number)
+    |> Enum.filter(& &1 >= min and &1 != number and &1 <= max)
+  end
+
+  def right_gap?(page) do
+    page.total_pages - page.page_number >= 5
+  end
+
+  def right_page_numbers(page) do
+    number = page.page_number
+    min = 1
+    max = page.total_pages
+
+    (number .. number + 5)
+    |> Enum.filter(& &1 >= min and &1 != number and &1 <= max)
+  end
+end

mix.exs

@@ -51,7 +51,8 @@ defmodule Philomena.MixProject do
       {:secure_compare, "~> 0.1.0"},
       {:elastix, "~> 0.7.1"},
       {:nimble_parsec, "~> 0.5.1"},
-      {:canary, "~> 1.1.1"}
+      {:canary, "~> 1.1.1"},
+      {:scrivener_ecto, "~> 2.0"}
     ]
   end
 

mix.lock

@@ -40,6 +40,8 @@
   "pow": {:hex, :pow, "1.0.13", "5ca3e8d9fecca037bfb0ea3b8dde070cc319746498e844d59fc209d461b0d426", [:mix], [{:ecto, "~> 2.2 or ~> 3.0", [hex: :ecto, repo: "hexpm", optional: false]}, {:phoenix, "~> 1.3.0 or ~> 1.4.0", [hex: :phoenix, repo: "hexpm", optional: false]}, {:phoenix_html, ">= 2.0.0 and <= 3.0.0", [hex: :phoenix_html, repo: "hexpm", optional: false]}, {:plug, ">= 1.5.0 and < 2.0.0", [hex: :plug, repo: "hexpm", optional: true]}], "hexpm"},
   "ranch": {:hex, :ranch, "1.7.1", "6b1fab51b49196860b733a49c07604465a47bdb78aa10c1c16a3d199f7f8c881", [:rebar3], [], "hexpm"},
   "retry": {:hex, :retry, "0.13.0", "bb9b2713f70f39337837852337ad280c77662574f4fb852a8386c269f3d734c4", [:mix], [], "hexpm"},
+  "scrivener": {:hex, :scrivener, "2.7.0", "fa94cdea21fad0649921d8066b1833d18d296217bfdf4a5389a2f45ee857b773", [:mix], [], "hexpm"},
+  "scrivener_ecto": {:hex, :scrivener_ecto, "2.2.0", "53d5f1ba28f35f17891cf526ee102f8f225b7024d1cdaf8984875467158c9c5e", [:mix], [{:ecto, "~> 3.0", [hex: :ecto, repo: "hexpm", optional: false]}, {:scrivener, "~> 2.4", [hex: :scrivener, repo: "hexpm", optional: false]}], "hexpm"},
   "secure_compare": {:hex, :secure_compare, "0.1.0", "01b3c93c8edb696e8a5b38397ed48e10958c8a5ec740606656445bcbec0aadb8", [:mix], [], "hexpm"},
   "slime": {:hex, :slime, "1.2.0", "d46ede53c96b743dfdd23821268dc9b01f04ffea65d9d57c4e3d9200b162df02", [:mix], [{:neotoma, "~> 1.7", [hex: :neotoma, repo: "hexpm", optional: false]}], "hexpm"},
   "ssl_verify_fun": {:hex, :ssl_verify_fun, "1.1.5", "6eaf7ad16cb568bb01753dbbd7a95ff8b91c7979482b95f38443fe2c8852a79b", [:make, :mix, :rebar3], [], "hexpm"},