Add feature to hold configs in filesystem

This patch adds feature to hold config files
on filesystem and adds all unit tests to have
enough coverage for milestones.

Change-Id: Icd6f3dc93e0f419500f82f0a6ccd62e500dfc918
Issue-ID: MUSIC-42
Signed-off-by: Shashank Kumar Shankar <shashank.kumar.shankar@intel.com>

1 files changed, 173 insertions, 0 deletions

diff --git a/src/dkv/api/registrationHandlers.go b/src/dkv/api/registrationHandlers.go
new file mode 100644
index 0000000..1c50b33
--- /dev/null
+++ b/src/dkv/api/registrationHandlers.go
@@ -0,0 +1,173 @@
+/*
+ * Copyright 2018 Intel Corporation, Inc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package api
+
+import (
+	"encoding/json"
+	"errors"
+	"github.com/gorilla/mux"
+	"net/http"
+)
+
+type CreateRegisterServiceBody struct {
+	Domain string `json:"domain"`
+}
+
+type CreateServiceSubdomainBody struct {
+	Subdomain string `json:"subdomain"`
+}
+
+func ValidateCreateRegisterServiceBody(body CreateRegisterServiceBody) error {
+	if body.Domain == "" {
+		return errors.New("Domain not set. Please set domain in POST.")
+	}
+	if body.Domain == "default" {
+		return errors.New("Domain not allowed. Please set another domain in POST.")
+	}
+	return nil
+}
+
+/*
+	TODO(sshank): Add validations to check if tokens/sub-domains/files indeed
+	exist in the token_service JSON or in the directory. This is to avoid the service
+	returning the file system errors to the user.
+*/
+
+func HandleServiceCreate(w http.ResponseWriter, r *http.Request) {
+	var body CreateRegisterServiceBody
+
+	decoder := json.NewDecoder(r.Body)
+	err := decoder.Decode(&body)
+
+	if err != nil {
+		GenerateResponse(w, r, http.StatusBadRequest, "Empty body.")
+		return
+	}
+
+	err = ValidateCreateRegisterServiceBody(body)
+
+	if err != nil {
+		GenerateResponse(w, r, http.StatusBadRequest, string(err.Error()))
+		return
+	}
+
+	token, err := Directory.CreateService(body)
+
+	if err != nil {
+		GenerateResponse(w, r, http.StatusInternalServerError, string(err.Error()))
+	} else {
+		GenerateResponse(w, r, http.StatusOK, "Registration Successful. Token: "+token)
+	}
+}
+
+func HandleServiceGet(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	token := vars["token"]
+
+	if token == "" {
+		GenerateResponse(w, r, http.StatusBadRequest, "Token not present in path.")
+		return
+	}
+
+	service, found, err := Directory.FindService(token)
+
+	if err != nil {
+		GenerateResponse(w, r, http.StatusInternalServerError, string(err.Error()))
+	} else {
+		if found == true {
+			GenerateResponse(w, r, http.StatusOK, service)
+		} else {
+			GenerateResponse(w, r, http.StatusNotFound, "Service for Token:"+token+"not found.")
+		}
+
+	}
+}
+
+func HandleServiceDelete(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	token := vars["token"]
+
+	if token == "default" {
+		GenerateResponse(w, r, http.StatusNotAcceptable, "Default delete not allowed.")
+		return
+	}
+
+	err := Directory.RemoveService(token)
+
+	if err != nil {
+		GenerateResponse(w, r, http.StatusInternalServerError, string(err.Error()))
+	} else {
+		GenerateResponse(w, r, http.StatusOK, "Deletion of service is successful.")
+	}
+}
+
+func HandleServiceSubdomainCreate(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	token := vars["token"]
+
+	var body CreateServiceSubdomainBody
+
+	decoder := json.NewDecoder(r.Body)
+	err := decoder.Decode(&body)
+
+	if err != nil {
+		GenerateResponse(w, r, http.StatusBadRequest, "Empty body.")
+		return
+	}
+
+	if body.Subdomain == "" {
+		GenerateResponse(w, r, http.StatusBadRequest, "Subdomain not found in POST.")
+		return
+	}
+
+	err = Directory.CreateServiceSubdomain(token, body.Subdomain)
+
+	if err != nil {
+		GenerateResponse(w, r, http.StatusInternalServerError, string(err.Error()))
+	} else {
+		GenerateResponse(w, r, http.StatusOK, "Subdomain creation success with token: "+token)
+	}
+
+}
+
+func HandleServiceSubdomainGet(w http.ResponseWriter, r *http.Request) {
+	// TODO(sshank): This will list all subdomain in a service.
+}
+
+func HandleServiceSubdomainDelete(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	token := vars["token"]
+	subdomain := vars["subdomain"]
+
+	if token == "" {
+		GenerateResponse(w, r, http.StatusBadRequest, "Token not passed.")
+		return
+	}
+
+	if token == "default" && subdomain == "" {
+		GenerateResponse(w, r, http.StatusNotAcceptable, "Not allowerd.")
+		return
+	}
+
+	err := Directory.RemoveServiceSubdomain(token, subdomain)
+
+	if err != nil {
+		GenerateResponse(w, r, http.StatusInternalServerError, string(err.Error()))
+	} else {
+		GenerateResponse(w, r, http.StatusOK, "Deletion of service is successful.")
+	}
+}