Merge: Added contributing guidelines and link from readme

[nit.git] / src / web / web_base.nit

diff --git a/src/web/web_base.nit b/src/web/web_base.nit
index ec9bf75..fcaac53 100644 (file)
--- a/src/web/web_base.nit
+++ b/src/web/web_base.nit
@@ -51,6 +51,42 @@ class ModelHandler
        end
 end
 
+# Specific handler for nitweb API.
+abstract class APIHandler
+       super ModelHandler
+
+       # The JSON API does not filter anything by default.
+       #
+       # So we can cache the model view.
+       var view: ModelView is lazy do
+               var view = new ModelView(model)
+               view.min_visibility = private_visibility
+               view.include_fictive = true
+               view.include_empty_doc = true
+               view.include_attribute = true
+               view.include_test_suite = true
+               return view
+       end
+
+       # Try to load the mentity from uri with `/:id`.
+       #
+       # Send 400 if `:id` is null.
+       # Send 404 if no entity is found.
+       # Return null in both cases.
+       fun mentity_from_uri(req: HttpRequest, res: HttpResponse): nullable MEntity do
+               var id = req.param("id")
+               if id == null then
+                       res.error 400
+                       return null
+               end
+               var mentity = find_mentity(view, id)
+               if mentity == null then
+                       res.error 404
+               end
+               return mentity
+       end
+end
+
 # A NitView is rendered by an action.
 interface NitView
        # Renders this view and returns something that can be written to a HTTP response.