From a3309148bc8d602f136d3a37430539668743f3b0 Mon Sep 17 00:00:00 2001
From: Shadowfacts <me@shadowfacts.net>
Date: Sun, 10 Mar 2019 19:47:01 -0400
Subject: [PATCH] Add filter web UI

---
 lib/frenzy/feed.ex                            |  5 ++-
 lib/frenzy/filter.ex                          | 22 +++++++++
 lib/frenzy/rule.ex                            | 22 +++++++++
 lib/frenzy_web/controllers/feed_controller.ex | 45 +++++++++++++++----
 .../controllers/filter_controller.ex          | 36 +++++++++++++++
 lib/frenzy_web/router.ex                      |  6 ++-
 lib/frenzy_web/templates/feed/show.html.eex   | 16 +++++++
 lib/frenzy_web/templates/filter/edit.html.eex | 43 ++++++++++++++++++
 lib/frenzy_web/views/filter_view.ex           |  3 ++
 .../20181121001107_create_feeds.exs           |  1 -
 .../20190309150407_create_filters.exs         | 16 +++++++
 .../20190309151322_feeds_add_filter.exs       |  9 ++++
 .../20190309185450_create_rules.exs           | 15 +++++++
 13 files changed, 227 insertions(+), 12 deletions(-)
 create mode 100644 lib/frenzy/filter.ex
 create mode 100644 lib/frenzy/rule.ex
 create mode 100644 lib/frenzy_web/controllers/filter_controller.ex
 create mode 100644 lib/frenzy_web/templates/filter/edit.html.eex
 create mode 100644 lib/frenzy_web/views/filter_view.ex
 create mode 100644 priv/repo/migrations/20190309150407_create_filters.exs
 create mode 100644 priv/repo/migrations/20190309151322_feeds_add_filter.exs
 create mode 100644 priv/repo/migrations/20190309185450_create_rules.exs

diff --git a/lib/frenzy/feed.ex b/lib/frenzy/feed.ex
index 3d538cc..facd90c 100644
--- a/lib/frenzy/feed.ex
+++ b/lib/frenzy/feed.ex
@@ -19,8 +19,10 @@ defmodule Frenzy.Feed do
     field :last_updated, :utc_datetime
     field :site_url, :string
     field :title, :string
+    field :filter_enabled, :boolean
 
     has_many :items, Frenzy.Item, on_delete: :delete_all
+    has_one :filter, Frenzy.Filter, on_delete: :delete_all
 
     timestamps()
   end
@@ -28,7 +30,8 @@ defmodule Frenzy.Feed do
   @doc false
   def changeset(feed, attrs) do
     feed
-    |> cast(attrs, [:title, :feed_url, :site_url, :last_updated])
+    |> cast(attrs, [:title, :feed_url, :site_url, :last_updated, :filter_enabled])
+    |> cast_assoc(:filter, required: true)
     |> validate_required([:feed_url])
   end
 end
diff --git a/lib/frenzy/filter.ex b/lib/frenzy/filter.ex
new file mode 100644
index 0000000..27c53d7
--- /dev/null
+++ b/lib/frenzy/filter.ex
@@ -0,0 +1,22 @@
+defmodule Frenzy.Filter do
+  use Ecto.Schema
+  import Ecto.Changeset
+
+  schema "filters" do
+    field :mode, :string
+    field :score, :integer
+
+    belongs_to :feed, Frenzy.Feed
+    has_many :rules, Frenzy.Rule, on_delete: :delete_all
+
+    timestamps()
+  end
+
+  @doc false
+  def changeset(filter, attrs) do
+    filter
+    |> cast(attrs, [:mode, :score])
+    |> cast_assoc(:rules)
+    |> validate_required([:mode, :score])
+  end
+end
diff --git a/lib/frenzy/rule.ex b/lib/frenzy/rule.ex
new file mode 100644
index 0000000..b303507
--- /dev/null
+++ b/lib/frenzy/rule.ex
@@ -0,0 +1,22 @@
+defmodule Frenzy.Rule do
+  use Ecto.Schema
+  import Ecto.Changeset
+
+  schema "rules" do
+    field :mode, :string
+    field :property, :string
+    field :param, :string
+    field :weight, :integer
+
+    belongs_to :filter, Frenzy.Filter
+
+    timestamps()
+  end
+
+  @doc false
+  def changeset(rule, attrs) do
+    rule
+    |> cast(attrs, [:mode, :property, :param, :weight])
+    |> validate_required([:mode, :property, :param, :weight])
+  end
+end
diff --git a/lib/frenzy_web/controllers/feed_controller.ex b/lib/frenzy_web/controllers/feed_controller.ex
index bbb1ec1..6772ee5 100644
--- a/lib/frenzy_web/controllers/feed_controller.ex
+++ b/lib/frenzy_web/controllers/feed_controller.ex
@@ -1,34 +1,61 @@
 defmodule FrenzyWeb.FeedController do
-	use FrenzyWeb, :controller
-  alias Frenzy.{Repo, Feed, Item}
+  use FrenzyWeb, :controller
+  alias Frenzy.{Repo, Feed, Filter, Item}
   alias FrenzyWeb.Router.Helpers, as: Routes
   alias FrenzyWeb.Endpoint
   import Ecto.Query
 
-	def index(conn, _params) do
-		render(conn, "index.html", feeds: Repo.all(Feed))
-	end
+  def index(conn, _params) do
+    render(conn, "index.html", feeds: Repo.all(Feed))
+  end
 
   def show(conn, %{"id" => id}) do
-    feed = Repo.get(Feed, id)
+    feed = Repo.get(Feed, id) |> Repo.preload(:filter)
     items = Repo.all(from Item, where: [feed_id: ^id], order_by: [desc: :date])
+
     render(conn, "show.html", %{
       feed: feed,
       items: items
-      })
+    })
   end
 
   def new(conn, _params) do
     changeset = Feed.changeset(%Feed{}, %{})
+
     render(conn, "new.html", changeset: changeset)
   end
 
   def create(conn, %{"feed" => feed}) do
-    changeset = Feed.changeset(%Feed{}, feed)
+    changeset =
+      Feed.changeset(
+        %Feed{
+          filter: %Filter{
+            mode: "accept",
+            score: 0,
+            rules: []
+          }
+        },
+        feed
+      )
+
     {:ok, feed} = Repo.insert(changeset)
     redirect(conn, to: Routes.feed_path(Endpoint, :index))
   end
 
+  def enable_filter(conn, %{"id" => id}) do
+    feed = Repo.get(Feed, id) |> Repo.preload(:filter)
+    changeset = Feed.changeset(feed, %{filter_enabled: true})
+    Repo.update(changeset)
+    redirect(conn, to: Routes.feed_path(Endpoint, :show, id))
+  end
+
+  def disable_filter(conn, %{"id" => id}) do
+    feed = Repo.get(Feed, id)
+    changeset = Feed.changeset(feed, %{filter_enabled: false})
+    Repo.update(changeset)
+    redirect(conn, to: Routes.feed_path(Endpoint, :show, id))
+  end
+
   def delete(conn, %{"id" => id}) do
     feed = Repo.get(Feed, id)
     {:ok, _} = Repo.delete(feed)
@@ -40,4 +67,4 @@ defmodule FrenzyWeb.FeedController do
     feed = Frenzy.UpdateFeeds.refresh(Frenzy.UpdateFeeds, feed)
     redirect(conn, to: Routes.feed_path(Endpoint, :show, feed.id))
   end
-end
\ No newline at end of file
+end
diff --git a/lib/frenzy_web/controllers/filter_controller.ex b/lib/frenzy_web/controllers/filter_controller.ex
new file mode 100644
index 0000000..5ea28e1
--- /dev/null
+++ b/lib/frenzy_web/controllers/filter_controller.ex
@@ -0,0 +1,36 @@
+defmodule FrenzyWeb.FilterController do
+  use FrenzyWeb, :controller
+  alias Frenzy.{Repo, Feed, Filter, Rule}
+  alias FrenzyWeb.Router.Helpers, as: Routes
+  alias FrenzyWeb.Endpoint
+  import Ecto.Query
+
+  def edit(conn, %{"id" => id}) do
+    filter = Repo.get(Filter, id) |> Repo.preload(:rules)
+    changeset = Filter.changeset(filter, %{})
+    render(conn, "edit.html", changeset: changeset)
+  end
+
+  def update(conn, %{"id" => id, "filter" => filter_params}) do
+    filter = Repo.get(Filter, id) |> Repo.preload(:rules)
+    changeset = Filter.changeset(filter, filter_params)
+    Repo.update(changeset)
+    redirect(conn, to: Routes.filter_path(Endpoint, :edit, id))
+  end
+
+  def add_rule(conn, %{"id" => id}) do
+    filter = Repo.get(Filter, id)
+
+    changeset =
+      Ecto.build_assoc(filter, :rules, %{
+        property: "title",
+        mode: "contains_string",
+        param: "",
+        weight: 5
+      })
+
+    Repo.insert(changeset)
+
+    redirect(conn, to: Routes.filter_path(Endpoint, :edit, id))
+  end
+end
diff --git a/lib/frenzy_web/router.ex b/lib/frenzy_web/router.ex
index c6bf4a1..9456985 100644
--- a/lib/frenzy_web/router.ex
+++ b/lib/frenzy_web/router.ex
@@ -12,7 +12,6 @@ defmodule FrenzyWeb.Router do
 
   pipeline :api do
     plug :accepts, ["json"]
-
   end
 
   scope "/", FrenzyWeb do
@@ -23,6 +22,11 @@ defmodule FrenzyWeb.Router do
     get "/", FeedController, :index
     resources "/feeds", FeedController, except: [:edit, :update]
     post "/feeds/:id/refresh", FeedController, :refresh
+    post "/feeds/:id/enable_filter", FeedController, :enable_filter
+    post "/feeds/:id/disable_filter", FeedController, :disable_filter
+
+    resources "/filters", FilterController, only: [:edit, :update]
+    post "/filters/:id/add_rule", FilterController, :add_rule
 
     resources "/items", ItemController, only: [:show]
     post "/items/:id/read", ItemController, :read
diff --git a/lib/frenzy_web/templates/feed/show.html.eex b/lib/frenzy_web/templates/feed/show.html.eex
index ca36dc9..cd5635f 100644
--- a/lib/frenzy_web/templates/feed/show.html.eex
+++ b/lib/frenzy_web/templates/feed/show.html.eex
@@ -2,10 +2,26 @@
   <%= submit "Refresh Feed" %>
 <% end %>
 
+
+<%= if @feed.filter_enabled do %>
+  <%= form_tag Routes.feed_path(@conn, :disable_filter, @feed.id), method: :post do %>
+    <%= submit "Disable Filter" %>
+  <% end %>
+
+  <%= form_tag Routes.filter_path(@conn, :edit, @feed.filter.id), method: :get do %>
+    <%= submit "Edit Filter" %>
+  <% end %>
+<% else %>
+  <%= form_tag Routes.feed_path(@conn, :enable_filter, @feed.id), method: :post do %>
+    <%= submit "Enable Filter" %>
+  <% end %>
+<% end %>
+
 <%= form_tag Routes.feed_path(@conn, :delete, @feed.id), method: :delete do %>
   <%= submit "Delete Feed" %>
 <% end %>
 
+
 <table>
   <%= for item <- @items do %>
     <tr <%= if item.read do %>class="item-read"<% end %>>
diff --git a/lib/frenzy_web/templates/filter/edit.html.eex b/lib/frenzy_web/templates/filter/edit.html.eex
new file mode 100644
index 0000000..c2ae383
--- /dev/null
+++ b/lib/frenzy_web/templates/filter/edit.html.eex
@@ -0,0 +1,43 @@
+<h2>Filter</h2>
+<%= form_for @changeset, Routes.filter_path(@conn, :update, @changeset.data.id), fn form -> %>
+  <div class="form-group">
+    <label for="mode">Mode</label>
+    <%= select form, :mode, [{"Accept", :accept}, {"Reject", :reject}] %>
+  </div>
+  <div class="form-group">
+    <label for="score">Score</label>
+    <%= number_input form, :score %>
+  </div>
+
+  <table>
+    <tr>
+      <th>Property</th>
+      <th>Mode</th>
+      <th>Param</th>
+      <th>Weight</th>
+    </tr>
+    <%= inputs_for form, :rules, fn p -> %>
+      <tr>
+        <td>
+          <%= select p, :property, [{"URL", :url}, {"Title", :title}, {"Author", :author}, {"Content", :content}] %>
+        </td>
+        <td>
+          <%= select p, :mode, [{"contains", :contains_string}, {"matches regex", :matches_regex}] %>
+        </td>
+        <td>
+          <%= text_input p, :param %>
+        </td>
+        <td>
+          <%= number_input p, :weight %>
+        </td>
+      </tr>
+    <% end %>
+  </table>
+
+  <div class="form-group">
+    <%= submit "Update Filter" %>
+  </div>
+<% end %>
+<%= form_tag Routes.filter_path(@conn, :add_rule, @changeset.data.id), method: :post do %>
+  <%= submit "Add Rule" %>
+<% end %>
\ No newline at end of file
diff --git a/lib/frenzy_web/views/filter_view.ex b/lib/frenzy_web/views/filter_view.ex
new file mode 100644
index 0000000..36a3a84
--- /dev/null
+++ b/lib/frenzy_web/views/filter_view.ex
@@ -0,0 +1,3 @@
+defmodule FrenzyWeb.FilterView do
+  use FrenzyWeb, :view
+end
diff --git a/priv/repo/migrations/20181121001107_create_feeds.exs b/priv/repo/migrations/20181121001107_create_feeds.exs
index 63c46d4..609b7b3 100644
--- a/priv/repo/migrations/20181121001107_create_feeds.exs
+++ b/priv/repo/migrations/20181121001107_create_feeds.exs
@@ -10,6 +10,5 @@ defmodule Frenzy.Repo.Migrations.CreateFeeds do
 
       timestamps()
     end
-
   end
 end
diff --git a/priv/repo/migrations/20190309150407_create_filters.exs b/priv/repo/migrations/20190309150407_create_filters.exs
new file mode 100644
index 0000000..513b535
--- /dev/null
+++ b/priv/repo/migrations/20190309150407_create_filters.exs
@@ -0,0 +1,16 @@
+defmodule Frenzy.Repo.Migrations.CreateRules do
+  use Ecto.Migration
+
+  def change do
+    create table(:filters) do
+      add :mode, :string
+      add :score, :integer
+      add :rules, :map
+      add :feed_id, references(:feeds)
+
+      timestamps()
+    end
+
+    # create index(:rules, [:filter])
+  end
+end
diff --git a/priv/repo/migrations/20190309151322_feeds_add_filter.exs b/priv/repo/migrations/20190309151322_feeds_add_filter.exs
new file mode 100644
index 0000000..dd1516b
--- /dev/null
+++ b/priv/repo/migrations/20190309151322_feeds_add_filter.exs
@@ -0,0 +1,9 @@
+defmodule Frenzy.Repo.Migrations.FeedsAddFilter do
+  use Ecto.Migration
+
+  def change do
+    alter table(:feeds) do
+      add :filter_enabled, :boolean
+    end
+  end
+end
diff --git a/priv/repo/migrations/20190309185450_create_rules.exs b/priv/repo/migrations/20190309185450_create_rules.exs
new file mode 100644
index 0000000..d74821e
--- /dev/null
+++ b/priv/repo/migrations/20190309185450_create_rules.exs
@@ -0,0 +1,15 @@
+defmodule Frenzy.Repo.Migrations.CreateRules do
+  use Ecto.Migration
+
+  def change do
+    create table(:rules) do
+      add :mode, :string
+      add :property, :string
+      add :param, :string
+      add :weight, :integer
+      add :filter_id, references(:filters)
+
+      timestamps()
+    end
+  end
+end