Seed code for Routing Manager (ric-plt/rtmgr).

[ric-plt/rtmgr.git] / pkg / sdl / file.go

diff --git a/pkg/sdl/file.go b/pkg/sdl/file.go
new file mode 100644 (file)
index 0000000..11c3350
--- /dev/null
+++ b/pkg/sdl/file.go
@@ -0,0 +1,74 @@
+/*
+==================================================================================
+  Copyright (c) 2019 AT&T Intellectual Property.
+  Copyright (c) 2019 Nokia
+
+   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.
+==================================================================================
+*/
+/*
+  Mnemonic:    file.go
+  Abstract:    File SDL implementation. Only for testing purpose.
+  Date:                16 March 2019
+*/
+
+package sdl
+
+import (
+       "encoding/json"
+       "errors"
+       "io/ioutil"
+       "os"
+       "rtmgr"
+)
+
+/*
+Reads the content of the rt.json file
+Parses the JSON content and loads each xApp entry into an xApp object
+Returns an array os xApp object
+*/
+func fileReadAll(file string) (*[]rtmgr.XApp, error) {
+       rtmgr.Logger.Debug("Invoked file.fileReadAll")
+       rtmgr.Logger.Debug("file.fileReadAll opens file: " + file)
+       var xapps *[]rtmgr.XApp
+       jsonFile, err := os.Open(file)
+       if err != nil {
+               return nil, errors.New("cannot open the file due to: " + err.Error())
+       }
+       defer jsonFile.Close()
+       byteValue, err := ioutil.ReadAll(jsonFile)
+       if err != nil {
+               return nil, errors.New("cannot read the file due to: " + err.Error())
+       }
+       err = json.Unmarshal(byteValue, &xapps)
+       if err != nil {
+               return nil, errors.New("cannot parse data due to: " + err.Error())
+       }
+       rtmgr.Logger.Debug("file.fileReadAll returns: %v", xapps)
+       return xapps, nil
+}
+
+func fileWriteAll(file string, xapps *[]rtmgr.XApp) error {
+       rtmgr.Logger.Debug("Invoked file.fileWriteAll")
+       rtmgr.Logger.Debug("file.fileWriteAll writes into file: " + file)
+       rtmgr.Logger.Debug("file.fileWriteAll writes data: %v", (*xapps))
+       byteValue, err := json.Marshal(xapps)
+       if err != nil {
+               return errors.New("cannot convert data due to: " + err.Error())
+       }
+       err = ioutil.WriteFile(file, byteValue, 0644)
+       if err != nil {
+               return errors.New("cannot write file due to: " + err.Error())
+       }
+       return nil
+}