Added webapp Dashboard + logic to interact with server.

Signed-off-by: Sebastien Douheret <sebastien.douheret@iot.bzh>

3 files changed, 173 insertions, 128 deletions

diff --git a/lib/xdsconfig/config.go b/lib/xdsconfig/config.go
index 854d383..9cff862 100644
--- a/lib/xdsconfig/config.go
+++ b/lib/xdsconfig/config.go
@@ -2,6 +2,8 @@ package xdsconfig
 
 import (
 	"fmt"
+	"io"
+	"path/filepath"
 
 	"os"
 
@@ -12,14 +14,20 @@ import (
 
 // Config parameters (json format) of /config command
 type Config struct {
-	Version       string `json:"version"`
-	APIVersion    string `json:"apiVersion"`
-	VersionGitTag string `json:"gitTag"`
+	Version       string
+	APIVersion    string
+	VersionGitTag string
+	Options       Options
+	FileConf      FileConfig
+	Log           *logrus.Logger
+	LogVerboseOut io.Writer
+}
 
-	// Private / un-exported fields
-	HTTPPort string         `json:"-"`
-	FileConf *FileConfig    `json:"-"`
-	Log      *logrus.Logger `json:"-"`
+// Options set at the command line
+type Options struct {
+	ConfigFile string
+	LogLevel   string
+	LogFile    string
 }
 
 // Config default values
@@ -32,39 +40,75 @@ const (
 func Init(ctx *cli.Context, log *logrus.Logger) (*Config, error) {
 	var err error
 
+	defaultWebAppDir := "${EXEPATH}/www"
+	defaultSTHomeDir := "${HOME}/.xds/agent/syncthing-config"
+
 	// Define default configuration
 	c := Config{
 		Version:       ctx.App.Metadata["version"].(string),
 		APIVersion:    DefaultAPIVersion,
 		VersionGitTag: ctx.App.Metadata["git-tag"].(string),
 
-		HTTPPort: "8010",
-		FileConf: &FileConfig{
-			LogsDir: "/tmp/logs",
+		Options: Options{
+			ConfigFile: ctx.GlobalString("config"),
+			LogLevel:   ctx.GlobalString("log"),
+			LogFile:    ctx.GlobalString("logfile"),
+		},
+
+		FileConf: FileConfig{
+			HTTPPort:  "8800",
+			WebAppDir: defaultWebAppDir,
+			LogsDir:   "/tmp/logs",
+			// SEB XDSAPIKey: "1234abcezam",
+			ServersConf: []XDSServerConf{
+				XDSServerConf{
+					URL:       "http://localhost:8000",
+					ConnRetry: 10,
+				},
+			},
 			SThgConf: &SyncThingConf{
-				Home: "${HOME}/.xds/agent/syncthing-config",
+				Home: defaultSTHomeDir,
 			},
 		},
 		Log: log,
 	}
 
 	// config file settings overwrite default config
-	c.FileConf, err = updateConfigFromFile(&c, ctx.GlobalString("config"))
+	err = readGlobalConfig(&c, c.Options.ConfigFile)
 	if err != nil {
 		return nil, err
 	}
 
+	// Handle where Logs are redirected:
+	//  default 'stdout' (logfile option default value)
+	//  else use file (or filepath) set by --logfile option
+	//  that may be overwritten by LogsDir field of config file
+	logF := c.Options.LogFile
+	logD := c.FileConf.LogsDir
+	if logF != "stdout" {
+		if logD != "" {
+			lf := filepath.Base(logF)
+			if lf == "" || lf == "." {
+				lf = "xds-agent.log"
+			}
+			logF = filepath.Join(logD, lf)
+		} else {
+			logD = filepath.Dir(logF)
+		}
+	}
+	if logD == "" || logD == "." {
+		logD = "/tmp/xds/logs"
+	}
+	c.Options.LogFile = logF
+	c.FileConf.LogsDir = logD
+
 	if c.FileConf.LogsDir != "" && !common.Exists(c.FileConf.LogsDir) {
 		if err := os.MkdirAll(c.FileConf.LogsDir, 0770); err != nil {
 			return nil, fmt.Errorf("Cannot create logs dir: %v", err)
 		}
 	}
+	c.Log.Infoln("Logs file:      ", c.Options.LogFile)
 	c.Log.Infoln("Logs directory: ", c.FileConf.LogsDir)
 
 	return &c, nil
 }
-
-// UpdateAll Update the current configuration
-func (c *Config) UpdateAll(newCfg Config) error {
-	return fmt.Errorf("Not Supported")
-}
diff --git a/lib/xdsconfig/configfile.go b/lib/xdsconfig/configfile.go
new file mode 100644
index 0000000..a47038b
--- /dev/null
+++ b/lib/xdsconfig/configfile.go
@@ -0,0 +1,112 @@
+package xdsconfig
+
+import (
+	"encoding/json"
+	"os"
+	"path"
+
+	common "github.com/iotbzh/xds-common/golib"
+)
+
+type SyncThingConf struct {
+	BinDir     string `json:"binDir"`
+	Home       string `json:"home"`
+	GuiAddress string `json:"gui-address"`
+	GuiAPIKey  string `json:"gui-apikey"`
+}
+
+type XDSServerConf struct {
+	URL       string `json:"url"`
+	ConnRetry int    `json:"connRetry"`
+
+	// private/not exported fields
+	ID            string `json:"-"`
+	APIBaseURL    string `json:"-"`
+	APIPartialURL string `json:"-"`
+}
+
+type FileConfig struct {
+	HTTPPort  string `json:"httpPort"`
+	WebAppDir string `json:"webAppDir"`
+	LogsDir   string `json:"logsDir"`
+	// SEB A SUP ? XDSAPIKey string         `json:"xds-apikey"`
+	ServersConf []XDSServerConf `json:"xdsServers"`
+	SThgConf    *SyncThingConf  `json:"syncthing"`
+}
+
+// readGlobalConfig reads configuration from a config file.
+// Order to determine which config file is used:
+//  1/ from command line option: "--config myConfig.json"
+//  2/ $HOME/.xds/agent/agent-config.json file
+//  3/ <current_dir>/agent-config.json file
+//  4/ <executable dir>/agent-config.json file
+
+func readGlobalConfig(c *Config, confFile string) error {
+
+	searchIn := make([]string, 0, 3)
+	if confFile != "" {
+		searchIn = append(searchIn, confFile)
+	}
+	if homeDir := common.GetUserHome(); homeDir != "" {
+		searchIn = append(searchIn, path.Join(homeDir, ".xds", "agent", "agent-config.json"))
+	}
+
+	searchIn = append(searchIn, "/etc/xds-agent/agent-config.json")
+
+	searchIn = append(searchIn, path.Join(common.GetExePath(), "agent-config.json"))
+
+	var cFile *string
+	for _, p := range searchIn {
+		if _, err := os.Stat(p); err == nil {
+			cFile = &p
+			break
+		}
+	}
+	if cFile == nil {
+		c.Log.Infof("No config file found")
+		return nil
+	}
+
+	c.Log.Infof("Use config file: %s", *cFile)
+
+	// TODO move on viper package to support comments in JSON and also
+	// bind with flags (command line options)
+	// see https://github.com/spf13/viper#working-with-flags
+
+	fd, _ := os.Open(*cFile)
+	defer fd.Close()
+
+	// Decode config file content and save it in a first variable
+	fCfg := FileConfig{}
+	if err := json.NewDecoder(fd).Decode(&fCfg); err != nil {
+		return err
+	}
+
+	// Decode config file content and overwrite default settings
+	fd.Seek(0, 0)
+	json.NewDecoder(fd).Decode(&c.FileConf)
+
+	// Disable Syncthing support when there is no syncthing field in config
+	if fCfg.SThgConf == nil {
+		c.FileConf.SThgConf = nil
+	}
+
+	// Support environment variables (IOW ${MY_ENV_VAR} syntax) in agent-config.json
+	vars := []*string{
+		&c.FileConf.LogsDir,
+		&c.FileConf.WebAppDir,
+	}
+	if c.FileConf.SThgConf != nil {
+		vars = append(vars, &c.FileConf.SThgConf.Home,
+			&c.FileConf.SThgConf.BinDir)
+	}
+	for _, field := range vars {
+		var err error
+		*field, err = common.ResolveEnvVar(*field)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
diff --git a/lib/xdsconfig/fileconfig.go b/lib/xdsconfig/fileconfig.go
deleted file mode 100644
index efe94bf..0000000
--- a/lib/xdsconfig/fileconfig.go
+++ /dev/null
@@ -1,111 +0,0 @@
-package xdsconfig
-
-import (
-	"encoding/json"
-	"os"
-	"os/user"
-	"path"
-	"path/filepath"
-
-	common "github.com/iotbzh/xds-common/golib"
-)
-
-type SyncThingConf struct {
-	BinDir     string `json:"binDir"`
-	Home       string `json:"home"`
-	GuiAddress string `json:"gui-address"`
-	GuiAPIKey  string `json:"gui-apikey"`
-}
-
-type FileConfig struct {
-	HTTPPort  string         `json:"httpPort"`
-	LogsDir   string         `json:"logsDir"`
-	XDSAPIKey string         `json:"xds-apikey"`
-	SThgConf  *SyncThingConf `json:"syncthing"`
-}
-
-// getConfigFromFile reads configuration from a config file.
-// Order to determine which config file is used:
-//  1/ from command line option: "--config myConfig.json"
-//  2/ $HOME/.xds/agent/agent-config.json file
-//  3/ <current_dir>/agent-config.json file
-//  4/ <executable dir>/agent-config.json file
-
-func updateConfigFromFile(c *Config, confFile string) (*FileConfig, error) {
-
-	searchIn := make([]string, 0, 3)
-	if confFile != "" {
-		searchIn = append(searchIn, confFile)
-	}
-	if usr, err := user.Current(); err == nil {
-		searchIn = append(searchIn, path.Join(usr.HomeDir, ".xds", "agent", "agent-config.json"))
-	}
-
-	searchIn = append(searchIn, "/etc/xds-agent/agent-config.json")
-
-	exePath := os.Args[0]
-	ee, _ := os.Executable()
-	exeAbsPath, err := filepath.Abs(ee)
-	if err == nil {
-		exePath, err = filepath.EvalSymlinks(exeAbsPath)
-		if err == nil {
-			exePath = filepath.Dir(ee)
-		} else {
-			exePath = filepath.Dir(exeAbsPath)
-		}
-	}
-	searchIn = append(searchIn, path.Join(exePath, "agent-config.json"))
-
-	var cFile *string
-	for _, p := range searchIn {
-		if _, err := os.Stat(p); err == nil {
-			cFile = &p
-			break
-		}
-	}
-	// Use default settings
-	fCfg := *c.FileConf
-
-	// Read config file when existing
-	if cFile != nil {
-		c.Log.Infof("Use config file: %s", *cFile)
-
-		// TODO move on viper package to support comments in JSON and also
-		// bind with flags (command line options)
-		// see https://github.com/spf13/viper#working-with-flags
-
-		fd, _ := os.Open(*cFile)
-		defer fd.Close()
-		if err := json.NewDecoder(fd).Decode(&fCfg); err != nil {
-			return nil, err
-		}
-	}
-
-	// Support environment variables (IOW ${MY_ENV_VAR} syntax) in agent-config.json
-	vars := []*string{
-		&fCfg.LogsDir,
-	}
-	if fCfg.SThgConf != nil {
-		vars = append(vars, &fCfg.SThgConf.Home, &fCfg.SThgConf.BinDir)
-	}
-	for _, field := range vars {
-		var err error
-		*field, err = common.ResolveEnvVar(*field)
-		if err != nil {
-			return nil, err
-		}
-	}
-
-	// Config file settings overwrite default config
-	if fCfg.HTTPPort != "" {
-		c.HTTPPort = fCfg.HTTPPort
-	}
-
-	// Set default apikey
-	// FIXME - rework with dynamic key
-	if fCfg.XDSAPIKey == "" {
-		fCfg.XDSAPIKey = "1234abcezam"
-	}
-
-	return &fCfg, nil
-}