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/*
* 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 rb
import (
"bytes"
"encoding/json"
"io/ioutil"
"os"
"path/filepath"
"github.com/onap/multicloud-k8s/src/k8splugin/internal/db"
"encoding/base64"
"log"
pkgerrors "github.com/pkg/errors"
)
// ConfigTemplate contains the parameters needed for ConfigTemplates
type ConfigTemplate struct {
TemplateName string `json:"template-name"`
Description string `json:"description"`
ChartName string
}
// ConfigTemplateManager is an interface exposes the resource bundle ConfigTemplate functionality
type ConfigTemplateManager interface {
CreateOrUpdate(rbName, rbVersion string, p ConfigTemplate, update bool) error
Get(rbName, rbVersion, templateName string) (ConfigTemplate, error)
List(rbName, rbVersion string) ([]ConfigTemplate, error)
Delete(rbName, rbVersion, templateName string) error
Upload(rbName, rbVersion, templateName string, inp []byte) error
}
// ConfigTemplateKey is key struct
type ConfigTemplateKey struct {
RBName string `json:"rb-name"`
RBVersion string `json:"rb-version"`
TemplateName string `json:"template-name"`
}
// We will use json marshalling to convert to string to
// preserve the underlying structure.
func (dk ConfigTemplateKey) String() string {
out, err := json.Marshal(dk)
if err != nil {
return ""
}
return string(out)
}
// ConfigTemplateClient implements the ConfigTemplateManager
// It will also be used to maintain some localized state
type ConfigTemplateClient struct {
storeName string
tagMeta string
tagContent string
}
// NewConfigTemplateClient returns an instance of the ConfigTemplateClient
// which implements the ConfigTemplateManager
func NewConfigTemplateClient() *ConfigTemplateClient {
return &ConfigTemplateClient{
storeName: "rbdef",
tagMeta: "confdefmetadata",
tagContent: "confdefcontent",
}
}
// CreateOrUpdate an entry for the resource bundle ConfigTemplate in the database
func (v *ConfigTemplateClient) CreateOrUpdate(rbName, rbVersion string, p ConfigTemplate, update bool) error {
log.Printf("[ConfigiTemplate]: create %s", rbName)
// Name is required
if p.TemplateName == "" {
return pkgerrors.New("Name is required for Resource Bundle ConfigTemplate")
}
//Check if ConfigTemplate already exists
_, err := v.Get(rbName, rbVersion, p.TemplateName)
if err == nil && !update {
return pkgerrors.New(" ConfigTemplate already exists for this Definition")
}
if err != nil && update {
return pkgerrors.New(" ConfigTemplate does not exist for this Definition")
}
//Check if provided resource bundle information is valid
_, err = NewDefinitionClient().Get(rbName, rbVersion)
if err != nil {
return pkgerrors.Errorf("Invalid Resource Bundle ID provided: %s", err.Error())
}
key := ConfigTemplateKey{
RBName: rbName,
RBVersion: rbVersion,
TemplateName: p.TemplateName,
}
if update {
err = db.DBconn.Update(v.storeName, key, v.tagMeta, p)
if err != nil {
return pkgerrors.Wrap(err, "Updating ConfigTemplate DB Entry")
}
} else {
err = db.DBconn.Create(v.storeName, key, v.tagMeta, p)
if err != nil {
return pkgerrors.Wrap(err, "Creating ConfigTemplate DB Entry")
}
}
return nil
}
// Get returns the Resource Bundle ConfigTemplate for corresponding ID
func (v *ConfigTemplateClient) Get(rbName, rbVersion, templateName string) (ConfigTemplate, error) {
key := ConfigTemplateKey{
RBName: rbName,
RBVersion: rbVersion,
TemplateName: templateName,
}
value, err := db.DBconn.Read(v.storeName, key, v.tagMeta)
if err != nil {
return ConfigTemplate{}, pkgerrors.Wrap(err, "Get ConfigTemplate")
}
//value is a byte array
if value != nil {
template := ConfigTemplate{}
err = db.DBconn.Unmarshal(value, &template)
if err != nil {
return ConfigTemplate{}, pkgerrors.Wrap(err, "Unmarshaling ConfigTemplate Value")
}
return template, nil
}
return ConfigTemplate{}, pkgerrors.New("Error getting ConfigTemplate")
}
// List returns the Resource Bundle ConfigTemplate for corresponding ID
func (v *ConfigTemplateClient) List(rbName, rbVersion string) ([]ConfigTemplate, error) {
//Get all config templates
dbres, err := db.DBconn.ReadAll(v.storeName, v.tagMeta)
if err != nil || len(dbres) == 0 {
return []ConfigTemplate{}, pkgerrors.Wrap(err, "No Config Templates Found")
}
var results []ConfigTemplate
for key, value := range dbres {
//value is a byte array
if value != nil {
tmp := ConfigTemplate{}
err = db.DBconn.Unmarshal(value, &tmp)
if err != nil {
log.Printf("[ConfigTemplate] Error: %s Unmarshaling value for: %s", err.Error(), key)
continue
}
keyTmp := ConfigTemplateKey{
RBName: rbName,
RBVersion: rbVersion,
TemplateName: tmp.TemplateName,
}
_, err := db.DBconn.Read(v.storeName, keyTmp, v.tagMeta)
if err == nil && keyTmp.RBName == rbName && keyTmp.RBVersion == rbVersion {
results = append(results, tmp)
}
}
}
if len(results) == 0 {
return results, pkgerrors.New("No Config Templates Found for Definition and Version")
}
return results, nil
}
// Delete the Resource Bundle ConfigTemplate from database
func (v *ConfigTemplateClient) Delete(rbName, rbVersion, templateName string) error {
key := ConfigTemplateKey{
RBName: rbName,
RBVersion: rbVersion,
TemplateName: templateName,
}
err := db.DBconn.Delete(v.storeName, key, v.tagMeta)
if err != nil {
return pkgerrors.Wrap(err, "Delete ConfigTemplate")
}
err = db.DBconn.Delete(v.storeName, key, v.tagContent)
if err != nil {
return pkgerrors.Wrap(err, "Delete ConfigTemplate Content")
}
return nil
}
// Upload the contents of resource bundle into database
func (v *ConfigTemplateClient) Upload(rbName, rbVersion, templateName string, inp []byte) error {
log.Printf("[ConfigTemplate]: Upload %s", templateName)
key := ConfigTemplateKey{
RBName: rbName,
RBVersion: rbVersion,
TemplateName: templateName,
}
//ignore the returned data here.
t, err := v.Get(rbName, rbVersion, templateName)
if err != nil {
return pkgerrors.Errorf("Invalid ConfigTemplate Name provided %s", err.Error())
}
err = isTarGz(bytes.NewBuffer(inp))
if err != nil {
return pkgerrors.Errorf("Error in file format %s", err.Error())
}
chartBasePath, err := ExtractTarBall(bytes.NewBuffer(inp))
if err != nil {
return pkgerrors.Wrap(err, "Extracting Template")
}
finfo, err := ioutil.ReadDir(chartBasePath)
if err != nil {
return pkgerrors.Wrap(err, "Detecting chart name")
}
//Store the first directory with Chart.yaml found as the chart name
for _, f := range finfo {
if f.IsDir() {
//Check if Chart.yaml exists
if _, err = os.Stat(filepath.Join(chartBasePath, f.Name(), "Chart.yaml")); err == nil {
t.ChartName = f.Name()
break
}
}
}
if t.ChartName == "" {
return pkgerrors.New("Invalid template no Chart.yaml file found")
}
err = db.DBconn.Create(v.storeName, key, v.tagMeta, t)
if err != nil {
return pkgerrors.Wrap(err, "Creating ConfigTemplate DB Entry")
}
//Encode given byte stream to text for storage
encodedStr := base64.StdEncoding.EncodeToString(inp)
err = db.DBconn.Create(v.storeName, key, v.tagContent, encodedStr)
if err != nil {
return pkgerrors.Errorf("Error uploading data to db %s", err.Error())
}
return nil
}
// Download the contents of the ConfigTemplate from DB
// Returns a byte array of the contents
func (v *ConfigTemplateClient) Download(rbName, rbVersion, templateName string) ([]byte, error) {
log.Printf("[ConfigTemplate]: Download %s", templateName)
//ignore the returned data here
//Check if rb is valid
_, err := v.Get(rbName, rbVersion, templateName)
if err != nil {
return nil, pkgerrors.Errorf("Invalid ConfigTemplate Name provided: %s", err.Error())
}
key := ConfigTemplateKey{
RBName: rbName,
RBVersion: rbVersion,
TemplateName: templateName,
}
value, err := db.DBconn.Read(v.storeName, key, v.tagContent)
if err != nil {
return nil, pkgerrors.Wrap(err, "Get Resource ConfigTemplate content")
}
if value != nil {
//Decode the string from base64
out, err := base64.StdEncoding.DecodeString(string(value))
if err != nil {
return nil, pkgerrors.Wrap(err, "Decode base64 string")
}
if out != nil && len(out) != 0 {
return out, nil
}
}
return nil, pkgerrors.New("Error downloading ConfigTemplate content")
}
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