Allow procs in basepath

Author: Tim Vandecasteele

CHANGELOG.markdown

@@ -2,6 +2,7 @@
 
 * Added Rails 4 support - [@jrhe](https://github.com/jrhe).
 * Fix: document APIs at root level - [@dblock](https://github.com/dblock).
+* Added support for procs in basepath - [@tim-vandecasteele](https://github.com/tim-vandecasteele).
 
 ### 0.5.0 (March 28, 2013)
 

lib/grape-swagger.rb

@@ -70,7 +70,7 @@ def self.setup(options)
               {
                 apiVersion: api_version,
                 swaggerVersion: "1.1",
-                basePath: base_path || request.base_url,
+                basePath: parse_base_path(base_path, request),
                 operations:[],
                 apis: routes_array
               }
@@ -105,7 +105,7 @@ def self.setup(options)
               {
                 apiVersion: api_version,
                 swaggerVersion: "1.1",
-                basePath: base_path || request.base_url,
+                basePath: parse_base_path(base_path, request),
                 resourcePath: "",
                 apis: routes_array
               }
@@ -190,6 +190,10 @@ def strip_heredoc(string)
               indent = string.scan(/^[ \t]*(?=\S)/).min.try(:size) || 0
               string.gsub(/^[ \t]{#{indent}}/, '')
             end
+
+            def parse_base_path(base_path, request)
+              (base_path.is_a?(Proc) ? base_path.call(request) : base_path) || request.base_url
+            end
           end
         end
       end

spec/non_default_api_spec.rb

@@ -31,6 +31,34 @@ def app; SimpleApiWithBasePath end
     end
   end
 
+  context "overruling the basepath with a proc" do
+    before(:all) do
+      class ProcBasePathMountedApi < Grape::API
+        desc 'this gets something'
+        get '/something' do
+          {:bla => 'something'}
+        end
+      end
+
+      class SimpleApiWithProcBasePath < Grape::API
+        mount ProcBasePathMountedApi
+        add_swagger_documentation :base_path => lambda { |request| "#{request.base_url}/some_value" }
+      end
+    end
+
+    def app; SimpleApiWithProcBasePath end
+
+    it "retrieves the given base-path on /swagger_doc" do
+      get '/swagger_doc'
+      last_response.body.should == "{:apiVersion=>\"0.1\", :swaggerVersion=>\"1.1\", :basePath=>\"http://example.org/some_value\", :operations=>[], :apis=>[{:path=>\"/swagger_doc/something.{format}\"}, {:path=>\"/swagger_doc/swagger_doc.{format}\"}]}"
+    end
+
+    it "retrieves the same given base-path for mounted-api" do
+      get '/swagger_doc/something'
+      last_response.body.should == "{:apiVersion=>\"0.1\", :swaggerVersion=>\"1.1\", :basePath=>\"http://example.org/some_value\", :resourcePath=>\"\", :apis=>[{:path=>\"/something.{format}\", :operations=>[{:notes=>nil, :summary=>\"this gets something\", :nickname=>\"GET-something---format-\", :httpMethod=>\"GET\", :parameters=>[]}]}]}"
+    end
+  end
+
   context "overruling the version" do
     before(:all) do
       class ApiVersionMountedApi < Grape::API