Refacture structure proposal. (#1793)

command/config-v8.go

@@ -0,0 +1,141 @@
+/*
+ * Minio Client (C) 2015 Minio, 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 command
+
+import (
+	"sync"
+
+	"github.com/minio/minio/pkg/probe"
+	"github.com/minio/minio/pkg/quick"
+)
+
+const (
+	defaultAccessKey = "YOUR-ACCESS-KEY-HERE"
+	defaultSecretKey = "YOUR-SECRET-KEY-HERE"
+)
+
+var (
+	// set once during first load.
+	cacheCfgV8 *configV8
+	// All access to mc config file should be synchronized.
+	cfgMutex = &sync.RWMutex{}
+)
+
+// hostConfig configuration of a host.
+type hostConfigV8 struct {
+	URL       string `json:"url"`
+	AccessKey string `json:"accessKey"`
+	SecretKey string `json:"secretKey"`
+	API       string `json:"api"`
+}
+
+// configV8 config version.
+type configV8 struct {
+	Version string                  `json:"version"`
+	Hosts   map[string]hostConfigV8 `json:"hosts"`
+}
+
+// newConfigV8 - new config version.
+func newConfigV8() *configV8 {
+	cfg := new(configV8)
+	cfg.Version = globalMCConfigVersion
+	cfg.Hosts = make(map[string]hostConfigV8)
+	return cfg
+}
+
+// SetHost sets host config if not empty.
+func (c *configV8) setHost(alias string, cfg hostConfigV8) {
+	if _, ok := c.Hosts[alias]; !ok {
+		c.Hosts[alias] = cfg
+	}
+}
+
+// load default values for missing entries.
+func (c *configV8) loadDefaults() {
+	// Minio server running locally.
+	c.setHost("local", hostConfigV8{
+		URL:       "http://localhost:9000",
+		AccessKey: "",
+		SecretKey: "",
+		API:       "S3v4",
+	})
+
+	// Amazon S3 cloud storage service.
+	c.setHost("s3", hostConfigV8{
+		URL:       "https://s3.amazonaws.com",
+		AccessKey: defaultAccessKey,
+		SecretKey: defaultSecretKey,
+		API:       "S3v4",
+	})
+
+	// Google cloud storage service.
+	c.setHost("gcs", hostConfigV8{
+		URL:       "https://storage.googleapis.com",
+		AccessKey: defaultAccessKey,
+		SecretKey: defaultSecretKey,
+		API:       "S3v2",
+	})
+
+	// Minio anonymous server for demo.
+	c.setHost("play", hostConfigV8{
+		URL:       "https://play.minio.io:9000",
+		AccessKey: "Q3AM3UQ867SPQQA43P2F",
+		SecretKey: "zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG",
+		API:       "S3v4",
+	})
+}
+
+// loadConfigV8 - loads a new config.
+func loadConfigV8() (*configV8, *probe.Error) {
+	cfgMutex.RLock()
+	defer cfgMutex.RUnlock()
+
+	// Cached in private global variable.
+	if cacheCfgV8 != nil {
+		return cacheCfgV8, nil
+	}
+
+	if !isMcConfigExists() {
+		return nil, errInvalidArgument().Trace()
+	}
+
+	mcCfgV8, err := quick.Load(mustGetMcConfigPath(), newConfigV8())
+	fatalIf(err.Trace(), "Unable to load mc config file ‘"+mustGetMcConfigPath()+"’.")
+
+	cfgV8 := mcCfgV8.Data().(*configV8)
+
+	// cache it.
+	cacheCfgV8 = cfgV8
+
+	return cfgV8, nil
+}
+
+// saveConfigV8 - saves an updated config.
+func saveConfigV8(cfgV8 *configV8) *probe.Error {
+	cfgMutex.Lock()
+	defer cfgMutex.Unlock()
+
+	qs, err := quick.New(cfgV8)
+	if err != nil {
+		return err.Trace()
+	}
+
+	// update the cache.
+	cacheCfgV8 = cfgV8
+
+	return qs.Save(mustGetMcConfigPath()).Trace(mustGetMcConfigPath())
+}