tag detail page

lib/philomena_web/controllers/tag/detail_controller.ex

@@ -0,0 +1,49 @@
+defmodule PhilomenaWeb.Tag.DetailController do
+  use PhilomenaWeb, :controller
+
+  alias Philomena.Tags.Tag
+  alias Philomena.Filters.Filter
+  alias Philomena.Users.User
+  alias Philomena.Repo
+  import Ecto.Query
+
+  plug :verify_authorized
+  plug :load_resource, model: Tag, id_name: "tag_id", id_field: "slug", persisted: true
+
+  def index(conn, _params) do
+    tag = conn.assigns.tag
+
+    filters_spoilering =
+      Filter
+      |> where([f], fragment("? @> ARRAY[?]::integer[]", f.spoilered_tag_ids, ^tag.id))
+      |> preload(:user)
+      |> Repo.all()
+
+    filters_hiding =
+      Filter
+      |> where([f], fragment("? @> ARRAY[?]::integer[]", f.hidden_tag_ids, ^tag.id))
+      |> preload(:user)
+      |> Repo.all()
+
+    users_watching =
+      User
+      |> where([u], fragment("? @> ARRAY[?]::integer[]", u.watched_tag_ids, ^tag.id))
+      |> Repo.all()
+
+    render(
+      conn,
+      "index.html",
+      title: "Tag Usage for Tag `#{tag.name}'",
+      filters_spoilering: filters_spoilering,
+      filters_hiding: filters_hiding,
+      users_watching: users_watching
+    )
+  end
+
+  defp verify_authorized(conn, _opts) do
+    case Canada.Can.can?(conn.assigns.current_user, :edit, %Tag{}) do
+      true   -> conn
+      _false -> PhilomenaWeb.NotAuthorizedPlug.call(conn)
+    end
+  end
+end

lib/philomena_web/router.ex

@@ -174,6 +174,7 @@ defmodule PhilomenaWeb.Router do
 
     resources "/tags", TagController, only: [] do
       resources "/watch", Tag.WatchController, only: [:create, :delete], singleton: true
+      resources "/details", Tag.DetailController, only: [:index]
     end
 
     resources "/avatar", AvatarController, only: [:edit, :update, :delete], singleton: true

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

@@ -10,6 +10,7 @@
     = link "Tag changes", to: Routes.tag_tag_change_path(@conn, :index, @tag), class: "detail-link"
     = if manages_tags?(@conn) do
       = link "Edit details", to: Routes.tag_path(@conn, :edit, @tag), class: "detail-link"
+      = link "Usage", to: Routes.tag_detail_path(@conn, :index, @tag), class: "detail-link"
 
     br
   

lib/philomena_web/templates/tag/detail/_filters.html.slime

@@ -0,0 +1,31 @@
+table.table
+  thead
+    tr
+      th Filter
+      th Type
+      th Owner
+      th Spoilers
+      th Hides
+  tbody
+    = for filter <- @filters do
+      tr
+        td = link filter.name, to: Routes.filter_path(@conn, :show, filter)
+        td
+          = cond do
+            - filter.system ->
+              ' System
+
+            - filter.public ->
+              ' Public
+
+            - true ->
+              ' Private
+
+        td
+          = if filter.user do
+            = link filter.user.name, to: Routes.profile_path(@conn, :show, filter.user)
+          - else
+            ' No user associated
+
+        td = length(filter.spoilered_tag_ids)
+        td = length(filter.hidden_tag_ids)

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

@@ -0,0 +1,17 @@
+h1
+  ' Tag Usage for
+  = link @tag.name, to: Routes.tag_path(@conn, :show, @tag)
+
+h3 Filters that spoiler this tag:
+= render PhilomenaWeb.Tag.DetailView, "_filters.html", filters: @filters_spoilering, conn: @conn
+
+h3 Filters that hide this tag:
+= render PhilomenaWeb.Tag.DetailView, "_filters.html", filters: @filters_hiding, conn: @conn
+
+h3
+  | Users that watch this tag (
+  = length(@users_watching)
+  | )
+
+= for u <- @users_watching do
+  = link u.name, to: Routes.profile_path(@conn, :show, u), class: "interaction-user-list-item"

lib/philomena_web/views/tag/detail_view.ex

@@ -0,0 +1,3 @@
+defmodule PhilomenaWeb.Tag.DetailView do
+  use PhilomenaWeb, :view
+end