From e438ccde89687298792584b5d43913a756201be9 Mon Sep 17 00:00:00 2001
From: Calancea Daniel <d4no0007@gmail.com>
Date: Wed, 7 Sep 2022 20:47:03 +0300
Subject: [PATCH 1/2] Added option for runtime configuration

---
 lib/open_api_spex/plug/swagger_ui.ex | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/lib/open_api_spex/plug/swagger_ui.ex b/lib/open_api_spex/plug/swagger_ui.ex
index 8e162956..1c2af612 100644
--- a/lib/open_api_spex/plug/swagger_ui.ex
+++ b/lib/open_api_spex/plug/swagger_ui.ex
@@ -12,6 +12,12 @@ defmodule OpenApiSpex.Plug.SwaggerUI do
   See the [swagger-ui configuration docs](https://swagger.io/docs/open-source-tools/swagger-ui/usage/configuration/) for details.
   Should dynamic configuration be required, the `config_url` option can be set to an API endpoint that will provide additional config.
 
+  ## Runtime Configuration
+
+  SwaggerUI also accepts functions as parameters, allowing runtime configurations.
+  Because of limitations of `router.ex` file, the functions can be defined only as: `{module, function_name}`.
+  Example: `{MyAppWeb.RuntimeConfig, :on_complete}`
+
   ## Example
 
       scope "/" do
@@ -22,6 +28,7 @@ defmodule OpenApiSpex.Plug.SwaggerUI do
           path: "/api/openapi",
           default_model_expand_depth: 3,
           display_operation_id: true
+          on_complete: {MyAppWeb.RuntimeConfig, :on_complete}
       end
 
       # Other scopes may use custom stacks.
@@ -153,6 +160,7 @@ defmodule OpenApiSpex.Plug.SwaggerUI do
   def call(conn, config) do
     csrf_token = Plug.CSRFProtection.get_csrf_token()
     config = supplement_config(config, conn)
+    config = evaluate_runtime_config(config)
     html = render(config, csrf_token)
 
     conn
@@ -203,4 +211,16 @@ defmodule OpenApiSpex.Plug.SwaggerUI do
   defp supplement_config(config, _conn) do
     config
   end
+
+  defp evaluate_runtime_config(config) do
+    Enum.into(config, %{}, fn opt -> evaluate_opt(opt) end)
+  end
+
+  defp evaluate_opt({key, {module, function_name}}) when is_atom(module) and is_atom(function_name) do
+    {key, apply(module, function_name, [])}
+  end
+
+  defp evaluate_opt(opt) do
+    opt
+  end
 end

From 966b5597a58110fe705bbe7f4db2a51b2785e0be Mon Sep 17 00:00:00 2001
From: Calancea Daniel <d4no0007@gmail.com>
Date: Wed, 7 Sep 2022 20:56:28 +0300
Subject: [PATCH 2/2] Updated plug documentation

---
 lib/open_api_spex/plug/swagger_ui.ex | 29 +++++++++++++++++++++-------
 1 file changed, 22 insertions(+), 7 deletions(-)

diff --git a/lib/open_api_spex/plug/swagger_ui.ex b/lib/open_api_spex/plug/swagger_ui.ex
index 1c2af612..f2346d8c 100644
--- a/lib/open_api_spex/plug/swagger_ui.ex
+++ b/lib/open_api_spex/plug/swagger_ui.ex
@@ -12,12 +12,6 @@ defmodule OpenApiSpex.Plug.SwaggerUI do
   See the [swagger-ui configuration docs](https://swagger.io/docs/open-source-tools/swagger-ui/usage/configuration/) for details.
   Should dynamic configuration be required, the `config_url` option can be set to an API endpoint that will provide additional config.
 
-  ## Runtime Configuration
-
-  SwaggerUI also accepts functions as parameters, allowing runtime configurations.
-  Because of limitations of `router.ex` file, the functions can be defined only as: `{module, function_name}`.
-  Example: `{MyAppWeb.RuntimeConfig, :on_complete}`
-
   ## Example
 
       scope "/" do
@@ -28,7 +22,6 @@ defmodule OpenApiSpex.Plug.SwaggerUI do
           path: "/api/openapi",
           default_model_expand_depth: 3,
           display_operation_id: true
-          on_complete: {MyAppWeb.RuntimeConfig, :on_complete}
       end
 
       # Other scopes may use custom stacks.
@@ -37,6 +30,28 @@ defmodule OpenApiSpex.Plug.SwaggerUI do
         resources "/users", MyAppWeb.UserController, only: [:index, :create, :show]
         get "/openapi", OpenApiSpex.Plug.RenderSpec, :show
       end
+
+  ## Runtime Configuration
+
+  SwaggerUI also accepts functions as parameters, allowing runtime configurations.
+  Because of limitations of `router.ex` file, the functions can be defined only as: `{module, function_name}`.
+
+  ## Example
+
+      defmodule RuntimeConfig do
+        def on_complete do
+          "function() { ui.preauthorizeApiKey("bearer", "your generated token here"); }"
+        end
+      end
+
+      scope "/" do
+        pipe_through :browser # Use the default browser stack
+
+        get "/swaggerui", OpenApiSpex.Plug.SwaggerUI,
+          path: "/api/openapi",
+          on_complete: {RuntimeConfig, :on_complete}
+      end
+
   """
   @behaviour Plug