Feat: Route and Resource Loading Add --path to beacon.install generator

lib/beacon/types/site.ex

@@ -27,6 +27,7 @@ defmodule Beacon.Types.Site do
   def valid?(site) when site in ["", nil, true, false], do: false
 
   def valid?(site) when is_binary(site) do
+    Regex.match?(~r/^[a-zA-Z0-9_]+$/, site)
   end
 
   def valid?(site) when is_atom(site) do
@@ -44,6 +45,14 @@ defmodule Beacon.Types.Site do
     not String.starts_with?(site, "beacon_")
   end
 
+  def valid_path?(path) when is_atom(path) do
+    path |> Atom.to_string() |> valid_path?()
+  end
+
+  def valid_path?(path) when is_binary(path) do
+    String.starts_with?(path, "/")
+  end
+
   @doc false
   def safe_to_atom(site) when is_atom(site), do: site
   def safe_to_atom(site) when is_binary(site), do: String.to_existing_atom(site)

lib/mix/tasks/install.ex

@@ -20,7 +20,8 @@ defmodule Mix.Tasks.Beacon.Install do
   use Mix.Task
 
   @switches [
-    site: :string
+    site: :string,
+    path: :string
   ]
 
   def run(argv) do
@@ -274,7 +275,10 @@ defmodule Mix.Tasks.Beacon.Install do
   end
 
   defp build_context_bindings(options) do
-    options = validate_options!(options)
+    options =
+      options
+      |> add_default_options_if_missing()
+      |> validate_options!()
 
     base_module = Mix.Phoenix.base()
     web_module = Mix.Phoenix.web_module(base_module)
@@ -285,6 +289,7 @@ defmodule Mix.Tasks.Beacon.Install do
     templates_path = Path.join([Application.app_dir(:beacon), "priv", "templates"])
     root = root_path()
     site = Keyword.get(options, :site)
+    path = Keyword.get(options, :path)
 
     [
       base_module: base_module,
@@ -293,6 +298,7 @@ defmodule Mix.Tasks.Beacon.Install do
       ctx_app: ctx_app,
       templates_path: templates_path,
       site: site,
+      path: path,
       beacon_data_source: %{
         dest_path: Path.join([root, lib_path, "beacon_data_source.ex"]),
         template_path: Path.join([templates_path, "install", "beacon_data_source.ex"]),
@@ -326,6 +332,8 @@ defmodule Mix.Tasks.Beacon.Install do
     mix beacon.install expect a site name, for example:
 
         mix beacon.install --site blog
+        or 
+        mix beacon.install --site blog --path "/blog_path"
     """)
   end
 
@@ -334,12 +342,27 @@ defmodule Mix.Tasks.Beacon.Install do
   end
 
   defp validate_options!(options) do
-    site = String.to_atom(options[:site])
-
     cond do
-      !Beacon.Types.Site.valid?(site) -> raise_with_help!("Invalid site name. It should not contain special characters.")
-      !Beacon.Types.Site.valid_name?(site) -> raise_with_help!("Invalid site name. The site name can't start with \"beacon_\".")
+      !Beacon.Types.Site.valid?(options[:site]) -> raise_with_help!("Invalid site name. It should not contain special characters.")
+      !Beacon.Types.Site.valid_name?(options[:site]) -> raise_with_help!("Invalid site name. The site name can't start with \"beacon_\".")
+      !Beacon.Types.Site.valid_path?(options[:path]) -> raise_with_help!("Invalid path value. The path value have to start with /.")
       :default -> options
     end
   end
+
+  defp add_default_options_if_missing(options) do
+    defaults =
+      @switches
+      |> Keyword.keys()
+      |> Enum.reduce([], fn
+        :path, acc ->
+          site = Keyword.get(options, :site)
+          [{:path, "/#{site}"} | acc]
+
+        _key, acc ->
+          acc
+      end)
+
+    Keyword.merge(defaults, options)
+  end
 end

priv/templates/install/beacon_router_scope.ex

@@ -3,5 +3,5 @@
 
   scope "/" do
     pipe_through :browser
-    beacon_site "/<%= site %>", site: :<%= site %>
+    beacon_site "<%= path %>", site: :<%= site %>
   end

test/beacon/types/site_test.exs

@@ -34,4 +34,14 @@ defmodule Beacon.Types.SiteTest do
       refute Site.valid_name?("beacon_some_name")
     end
   end
+
+  describe "valid_path?/1" do
+    test "SUCCESS: Return TRUE if it is a valid path" do
+      assert Site.valid_path?("/some_name")
+    end
+
+    test "SUCCESS: Return FALSE if it is an invalid name" do
+      refute Site.valid_path?("forgot_slash_at_beginning")
+    end
+  end
 end

test/mix/tasks/install_test.exs

@@ -448,10 +448,77 @@ defmodule Mix.Tasks.Beacon.InstallTest do
         Install.run(["--site", "beacon_"])
       end
 
+      # Invalid path value
+      assert_raise Mix.Error, fn ->
+        Install.run(["--site", "blog", "--path", "forgot_slash_at_beginning"])
+      end
+
       # Invalid option
       assert_raise OptionParser.ParseError, ~r/1 error found!\n--invalid-argument : Unknown option/, fn ->
         Install.run(["--invalid-argument", "invalid"])
       end
     end)
   end
+
+  test "SUCCESS: New flag --path value updates beacon_path" do
+    Mix.Project.in_project(:my_app, ".", fn _module ->
+      Install.run(["--site", "my_site", "--path", "/some_other_path"])
+
+      # Injects beacon scope into router file
+      assert File.read!(@router_path) ==
+               """
+               defmodule MyAppWeb.Router do
+                 use MyAppWeb, :router
+
+                 pipeline :browser do
+                   plug :accepts, ["html"]
+                   plug :fetch_session
+                   plug :fetch_live_flash
+                   plug :put_root_layout, html: {MyAppWeb.Layouts, :root}
+                   plug :protect_from_forgery
+                   plug :put_secure_browser_headers
+                 end
+
+                 pipeline :api do
+                   plug :accepts, ["json"]
+                 end
+
+                 scope "/", MyAppWeb do
+                   pipe_through :browser
+
+                   get "/", PageController, :home
+                 end
+
+                 # Other scopes may use custom stacks.
+                 # scope "/api", MyAppWeb do
+                 #   pipe_through :api
+                 # end
+
+                 # Enable LiveDashboard and Swoosh mailbox preview in development
+                 if Application.compile_env(:test_app, :dev_routes) do
+                   # If you want to use the LiveDashboard in production, you should put
+                   # it behind authentication and allow only admins to access it.
+                   # If your application does not have an admins-only section yet,
+                   # you can use Plug.BasicAuth to set up some basic authentication
+                   # as long as you are also using SSL (which you should anyway).
+                   import Phoenix.LiveDashboard.Router
+
+                   scope "/dev" do
+                     pipe_through :browser
+
+                     live_dashboard "/dashboard", metrics: MyAppWeb.Telemetry
+                     forward "/mailbox", Plug.Swoosh.MailboxPreview
+                   end
+                 end
+
+                 use Beacon.Router
+
+                 scope "/" do
+                   pipe_through :browser
+                   beacon_site "/some_other_path", site: :my_site
+                 end
+               end
+               """
+    end)
+  end
 end