Tag change search (#234)

* profile/tag_change: add search box to show only a single tag

* Minor fixup

---------

Co-authored-by: prg <prg@lacunae.de>

lib/philomena_web/controllers/profile/tag_change_controller.ex

@@ -3,6 +3,7 @@ defmodule PhilomenaWeb.Profile.TagChangeController do
 
   alias Philomena.Users.User
   alias Philomena.Images.Image
+  alias Philomena.Tags.Tag
   alias Philomena.TagChanges.TagChange
   alias Philomena.Repo
   import Ecto.Query
@@ -16,19 +17,27 @@ defmodule PhilomenaWeb.Profile.TagChangeController do
     tag_changes =
       TagChange
       |> join(:inner, [tc], i in Image, on: tc.image_id == i.id)
+      |> only_tag_join(params)
       |> where(
         [tc, i],
         tc.user_id == ^user.id and not (i.user_id == ^user.id and i.anonymous == true)
       )
       |> added_filter(params)
+      |> only_tag_filter(params)
       |> preload([:tag, :user, image: [:user, :sources, tags: :aliases]])
       |> order_by(desc: :id)
       |> Repo.paginate(conn.assigns.scrivener)
 
+    # params.permit(:added, :only_tag) ...
+    pagination_params =
+      [added: conn.params["added"], only_tag: conn.params["only_tag"]]
+      |> Keyword.filter(fn {k, _v} -> Map.has_key?(conn.params, "#{k}") end)
+
     render(conn, "index.html",
       title: "Tag Changes for User `#{user.name}'",
       user: user,
-      tag_changes: tag_changes
+      tag_changes: tag_changes,
+      pagination_params: pagination_params
     )
   end
 
@@ -40,4 +49,16 @@ defmodule PhilomenaWeb.Profile.TagChangeController do
 
   defp added_filter(query, _params),
     do: query
+
+  defp only_tag_join(query, %{"only_tag" => only_tag}) when only_tag != "",
+    do: join(query, :inner, [tc], t in Tag, on: tc.tag_id == t.id)
+
+  defp only_tag_join(query, _params),
+    do: query
+
+  defp only_tag_filter(query, %{"only_tag" => only_tag}) when only_tag != "",
+    do: where(query, [_, _, t], t.name == ^only_tag)
+
+  defp only_tag_filter(query, _params),
+    do: query
 end

lib/philomena_web/templates/profile/tag_change/index.html.slime

@@ -4,16 +4,16 @@ h1
     = @user.name
 
 - route = fn p -> Routes.profile_tag_change_path(@conn, :index, @user, p) end
-- params = if @conn.params["added"], do: [added: @conn.params["added"]]
+- pagination = render PhilomenaWeb.PaginationView, "_pagination.html", page: @tag_changes, route: route, conn: @conn, params: @pagination_params
-- pagination = render PhilomenaWeb.PaginationView, "_pagination.html", page: @tag_changes, route: route, conn: @conn, params: params
 
 .block
   .block__header
-    span.block__header__title
+    = form_for @conn, Routes.profile_tag_change_path(@conn, :index, @user), [method: "get", enforce_utf8: false], fn f ->
-      | Display only:
+      = text_input f, :only_tag, class: "input", placeholder: "Tag", title: "Only show this tag", autocapitalize: "none"
+      = submit "Search", class: "button", title: "Search"
 
-    = link "Removed", to: Routes.profile_tag_change_path(@conn, :index, @user, added: 0)
+      = link "Removed", to: Routes.profile_tag_change_path(@conn, :index, @user, Keyword.merge(@pagination_params, added: 0))
-    = link "Added", to: Routes.profile_tag_change_path(@conn, :index, @user, added: 1)
+      = link "Added", to: Routes.profile_tag_change_path(@conn, :index, @user, Keyword.merge(@pagination_params, added: 1))
-    = link "All", to: Routes.profile_tag_change_path(@conn, :index, @user)
+      = link "All", to: Routes.profile_tag_change_path(@conn, :index, @user, Keyword.delete(@pagination_params, :added))
 
   = render PhilomenaWeb.TagChangeView, "index.html", conn: @conn, tag_changes: @tag_changes, pagination: pagination