Update order_handler, fix json_order_converter

examples/restbucks/src/domain/json_order_converter.e

@@ -6,73 +6,64 @@
 
 class
 	JSON_ORDER_CONVERTER
-
 inherit
 	JSON_CONVERTER
-
 create
 	make
-
 feature -- Initialization
-
 	make
 		do
 			create object.make ("","","")
 		end
-
 feature	 -- Access
-
 	 object : ORDER
 
-	 value: detachable JSON_OBJECT
 
+	 value : detachable JSON_OBJECT
 feature -- Conversion
 
 	from_json (j: attached  like value): detachable like object
             -- Convert from JSON value. Returns Void if unable to convert
        local
-            s_name, s_key, s_option: detachable STRING_32
+            lstr1, lstr2, lstr3 : detachable STRING_32
-            q: INTEGER_8
+            q: detachable INTEGER_8
             o: ORDER
             i : ITEM
-            l_array : detachable LIST [JSON_VALUE]
+            l_val : detachable JSON_ARRAY
+            l_array : detachable ARRAYED_LIST[JSON_VALUE]
+            jv : detachable JSON_OBJECT
             is_valid_from_json : BOOLEAN
         do
             is_valid_from_json := True
+            lstr1 ?= json.object (j.item (id_key), Void)
+            lstr2 ?= json.object (j.item (location_key), Void)
+            lstr3 ?= json.object (j.item (status_key), Void)
+            l_val ?= j.item (items_key)
 
-            s_name   ?= json.object (j.item (id_key), Void)
+         	create o.make (lstr1, lstr2, lstr3)
-            s_key    ?= json.object (j.item (location_key), Void)
-            s_option ?= json.object (j.item (status_key), Void)
 
-         	create o.make (s_name, s_key, s_option)
+			if l_val /= void then
-
-			if attached {JSON_ARRAY} j.item (items_key) as l_val then
 				l_array := l_val.array_representation
 				from
 					l_array.start
 				until
 					l_array.after
 				loop
-					if attached {JSON_OBJECT} l_array.item_for_iteration as jv then
+					jv ?= l_array.item_for_iteration
-						if attached {INTEGER_8} json.object (jv.item (quantity_key), Void) as l_integer then
+					if jv /= Void then
-							q := l_integer
+						lstr1 ?= json.object (jv.item (name_key), Void)
-						else
+    	        		lstr2 ?= json.object (jv.item (size_key), Void)
-							q := 0
+    	        		lstr3 ?= json.object (jv.item (option_key), Void)
-						end
+						q     ?= json.object (jv.item (quantity_key),Void)
-
+						if lstr1/= Void and then lstr2 /= Void and then lstr3 /= Void then
-						s_name   ?= json.object (jv.item (id_key), Void)
+							if is_valid_item_customization(lstr1,lstr2,lstr3,q) then
-						s_key    ?= json.object (jv.item (location_key), Void)
+								create i.make (lstr1, lstr2,lstr3, q)
-						s_option ?= json.object (jv.item (status_key), Void)
-
-						if s_name /= Void and s_key /= Void and s_option /= Void then
-							if is_valid_item_customization (s_name, s_key, s_option,q) then
-								create i.make (s_name, s_key, s_option, q)
 								o.add_item (i)
 							else
-								is_valid_from_json := False
+								is_valid_from_json := false
 							end
 						else
-							is_valid_from_json := False
+							is_valid_from_json := false
 						end
 					end
 
@@ -84,6 +75,7 @@ feature -- Conversion
 			else
 				Result := o
 			end
+
 	    end
 
     to_json (o: like object): like value
@@ -116,7 +108,6 @@ feature -- Conversion
         end
 
  feature {NONE} -- Implementation
-
 	id_key: JSON_STRING
         once
             create Result.make_json ("id")
@@ -156,12 +147,12 @@ feature -- Conversion
     		create Result.make_json ("quantity")
     	end
 
+
     option_key : JSON_STRING
 
     	once
     		create Result.make_json ("option")
     	end
-
 feature -- Validation
 
 	is_valid_item_customization ( name :  STRING_32; size: STRING_32; option :  STRING_32; quantity :  INTEGER_8  ) : BOOLEAN

examples/restbucks/src/resource/order_handler.e

@@ -41,41 +41,39 @@ feature -- HTTP Methods
 			-- If the GET request is not SUCCESS, we response with
 			-- 404 Resource not found
 		local
-			joc : JSON_ORDER_CONVERTER
-			l_order : detachable ORDER
-			jv : detachable JSON_VALUE
 			id :  STRING
-			uri : LIST [READABLE_STRING_32]
-			h : EWF_HEADER
 		do
 			if attached req.orig_path_info as orig_path then
-				uri := orig_path.split ('/')
+				id := get_order_id_from_path (orig_path)
-				id := uri.at (3)
+				if attached retrieve_order (id) as l_order then
-				create joc.make
+					compute_response_get (ctx, req, res, l_order)
-				json.add_converter(joc)
-				if db_access.orders.has_key (id) then
-					l_order := db_access.orders.item (id)
-					jv ?= json.value (l_order)
-					if attached jv as j then
-						create h.make
-						h.put_status ({HTTP_STATUS_CODE}.ok)
-						h.put_content_type ("application/json")
-						if attached req.request_time as time then
-							h.add_header ("Date:" +time.formatted_out ("ddd,[0]dd mmm yyyy [0]hh:[0]mi:[0]ss.ff2") + " GMT")
-						end
-						if l_order /= Void then
-							h.add_header ("Etag: " + l_order.etag)
-						end
-						res.set_status_code ({HTTP_STATUS_CODE}.ok)
-						res.write_headers_string (h.string)
-						res.write_string (j.representation)
-					end
 				else
 					handle_resource_not_found_response ("The following resource" + orig_path + " is not found ", ctx, req, res)
 				end
 			end
 		end
 
+	compute_response_get (ctx: C; req: WGI_REQUEST; res: WGI_RESPONSE_BUFFER; l_order : ORDER)
+		local
+			h: EWF_HEADER
+			l_msg : STRING
+		do
+			create h.make
+			h.put_status ({HTTP_STATUS_CODE}.ok)
+			h.put_content_type_application_json
+			if attached {JSON_VALUE} json.value (l_order) as jv then
+				l_msg := jv.representation
+				h.put_content_length (l_msg.count)
+				if attached req.request_time as time then
+					h.add_header ("Date:" + time.formatted_out ("ddd,[0]dd mmm yyyy [0]hh:[0]mi:[0]ss.ff2") + " GMT")
+				end
+				res.set_status_code ({HTTP_STATUS_CODE}.ok)
+				res.write_headers_string (h.string)
+				res.write_string (l_msg)
+			end
+		end
+
+
 	do_put (ctx: C; req: WGI_REQUEST; res: WGI_RESPONSE_BUFFER)
 		local
 			l_post: STRING
@@ -118,15 +116,13 @@ feature -- HTTP Methods
 
 	do_delete (ctx: C; req: WGI_REQUEST; res: WGI_RESPONSE_BUFFER)
 		local
-			uri: LIST [READABLE_STRING_32]
 			id: STRING
 			h : EWF_HEADER
 		do
 			fixme ("TODO handle an Internal Server Error")
 			fixme ("Refactor the code, create new abstractions")
 			if  attached req.orig_path_info as orig_path then
-				uri := orig_path.split ('/')
+				id := get_order_id_from_path (orig_path)
-				id := uri.at (3)
 				if  db_access.orders.has_key (id) then
 					delete_order( id)
 					create h.make
@@ -148,7 +144,7 @@ feature -- HTTP Methods
 			-- POST is used for creation and the server determines the URI
 			-- of the created resource.
 			-- If the request post is SUCCESS, the server will create the order and will response with
-			-- HTTP_RESPONSE 201 CREATED
+			-- HTTP_RESPONSE 201 CREATED, the Location header will contains the newly created order's URI
 			-- if the request post is not SUCCESS, the server will response with
 			-- HTTP_RESPONSE 400 BAD REQUEST, the client send a bad request
 			-- HTTP_RESPONSE 500 INTERNAL_SERVER_ERROR, when the server can deliver the request
@@ -170,8 +166,13 @@ feature -- HTTP Methods
 			h: EWF_HEADER
 			l_msg : STRING
 			l_location :  STRING
+			joc : JSON_ORDER_CONVERTER
 		do
 			create h.make
+
+			create joc.make
+			json.add_converter(joc)
+
 			h.put_status ({HTTP_STATUS_CODE}.created)
 			h.put_content_type_application_json
 			if attached {JSON_VALUE} json.value (l_order) as jv then
@@ -190,8 +191,21 @@ feature -- HTTP Methods
 			end
 		end
 
+feature {NONE} -- URI helper methods
+
+	get_order_id_from_path ( a_path: READABLE_STRING_32) : STRING
+		do
+				Result := a_path.split ('/').at(3)
+		end
+
 feature {NONE} -- Implementation Repository Layer
 
+	retrieve_order ( id : STRING) : detachable ORDER
+		-- get the order by id if it exist, in other case, Void
+		do
+			Result := db_access.orders.item (id)
+		end
+
 	save_order (an_order: ORDER)
 			-- save the order to the repository
 		local
@@ -227,8 +241,8 @@ feature {NONE} -- Implementation Repository Layer
 			-- extract an object Order from the request, or Void
 			-- if the request is invalid
 		local
-			joc : JSON_ORDER_CONVERTER
 			parser : JSON_PARSER
+			joc : JSON_ORDER_CONVERTER
 		do
 			create joc.make
 			json.add_converter(joc)