refactor yaml labels, add overwrite protection

Signed-off-by: Christian Richter <crichter@owncloud.com>

ocis/pkg/command/init.go

@@ -2,16 +2,32 @@ package command
 
 import (
 	"bufio"
+	"errors"
 	"fmt"
+	"io/ioutil"
+	"log"
 	"os"
+	"path"
 	"strings"
 
 	"github.com/owncloud/ocis/ocis-pkg/config"
 	"github.com/owncloud/ocis/ocis/pkg/register"
 	cli "github.com/urfave/cli/v2"
+	"gopkg.in/yaml.v3"
+
+	accounts "github.com/owncloud/ocis/extensions/accounts/pkg/config"
+	graph "github.com/owncloud/ocis/extensions/graph/pkg/config"
+	idm "github.com/owncloud/ocis/extensions/idm/pkg/config"
 )
 
+const configFilename string = "ocis.yml"
+
 func InitCommand(cfg *config.Config) *cli.Command {
+	// TODO: remove homedir get
+	homeDir, err := os.UserHomeDir()
+	if err != nil {
+		log.Fatalf("could not get homedir")
+	}
 	return &cli.Command{
 		Name:  "init",
 		Usage: "initialise an ocis config",
@@ -21,12 +37,24 @@ func InitCommand(cfg *config.Config) *cli.Command {
 				EnvVars: []string{"OCIS_INSECURE"},
 				Value:   "ask",
 			},
+			&cli.BoolFlag{
+				Name:    "force-overwrite",
+				Aliases: []string{"f"},
+				EnvVars: []string{"OCIS_FORCE_CONFIG_OVERWRITE"},
+				Value:   false,
+			},
+			&cli.StringFlag{
+				Name: "config-path",
+				//Value: cfg.ConfigPath, // TODO: as soon as PR 3480 is merged, remove quotes
+				Value: path.Join(homeDir, ".ocis"), // TODO: this is temporary for experimenting, line above is relevant
+				Usage: "config path for the ocis runtime",
+				// Destination: &cfg.ConfigFile, // TODO: same as above
+			},
 		},
 		Action: func(c *cli.Context) error {
-			// TODO: discuss if we want overwrite protection for existing configs
 			insecureFlag := c.String("insecure")
 			if insecureFlag == "ask" {
-				answer := strings.ToLower(StringPrompt("Insecure Backends? [Yes|No]"))
+				answer := strings.ToLower(stringPrompt("Insecure Backends? [Yes|No]"))
 				if answer == "yes" || answer == "y" {
 					cfg.Proxy.InsecureBackends = true
 				} else {
@@ -39,25 +67,99 @@ func InitCommand(cfg *config.Config) *cli.Command {
 					cfg.Proxy.InsecureBackends = false
 				}
 			}
-			fmt.Println(cfg.Proxy.InsecureBackends)
+			err := createConfig(cfg.Proxy.InsecureBackends, c.Bool("force-overwrite"), c.String("config-path"))
+			if err != nil {
+				log.Fatalf("Could not create config: %s", err)
+			}
 			return nil
 		},
 	}
 }
 
-func StringPrompt(label string) string {
-	var s string
-	r := bufio.NewReader(os.Stdin)
-	for {
-		fmt.Fprint(os.Stderr, label+" ")
-		s, _ = r.ReadString('\n')
-		if s != "" {
-			break
-		}
-	}
-	return strings.TrimSpace(s)
-}
-
 func init() {
 	register.AddCommand(InitCommand)
 }
+
+func checkConfigPath(configPath string) error {
+	targetPath := path.Join(configPath, configFilename)
+	_, err := os.Stat(targetPath)
+	if err == nil {
+		return errors.New(fmt.Sprintf("Config in %s already exists", targetPath))
+	}
+	return nil
+}
+
+func createConfig(insecure, forceOverwrite bool, configPath string) error {
+	err := checkConfigPath(configPath)
+	if err != nil && forceOverwrite == false {
+		return err
+	}
+	err = os.MkdirAll(configPath, 0700)
+	if err != nil {
+		return err
+	}
+	cfg := config.Config{
+		Accounts: &accounts.Config{},
+		//Audit:    &audit.Config{},
+		//GLAuth:        &glauth.Config{},
+		//GraphExplorer: &graphExplorer.Config{},
+		Graph: &graph.Config{},
+		IDM:   &idm.Config{},
+		//IDP:           &idp.Config{},
+		//Nats:          &nats.Config{},
+		//Notifications: &notifications.Config{},
+		//OCS:           &ocs.Config{},
+		//Proxy:         &proxy.Config{},
+		//Settings:      &settings.Config{},
+		//Storage:       &storage.Config{},
+		//Thumbnails:    &thumbnails.Config{},
+		//Web:           &web.Config{},
+		//WebDAV:        &webdav.Config{},
+	}
+
+	idmServicePassword := "randomizeme"
+	idpServicePassword := "randomizeme"
+	ocisAdminServicePassword := "randomizeme"
+	revaServicePassword := "randomizeme"
+	tokenManagerJwtSecret := "randomizeme"
+
+	// TODO: generate outputs for all occurences above
+	cfg.TokenManager.JWTSecret = tokenManagerJwtSecret
+	cfg.Accounts.TokenManager.JWTSecret = tokenManagerJwtSecret
+	cfg.Graph.TokenManager.JWTSecret = tokenManagerJwtSecret
+	cfg.IDM.ServiceUserPasswords.Idm = idmServicePassword
+	cfg.IDM.ServiceUserPasswords.Idp = idpServicePassword
+	cfg.IDM.ServiceUserPasswords.OcisAdmin = ocisAdminServicePassword
+	cfg.IDM.ServiceUserPasswords.Reva = revaServicePassword
+	yamlOutput, err := yaml.Marshal(cfg)
+	if err != nil {
+		return err
+	}
+	targetPath := path.Join(configPath, configFilename)
+	err = ioutil.WriteFile(targetPath, yamlOutput, 0600)
+	if err != nil {
+		return err
+	}
+	fmt.Printf(
+		"======================================\n"+
+			" generated OCIS Config\n"+
+			"======================================\n"+
+			" configpath : %s\n"+
+			" user       : admin\n"+
+			" password   : %s\n",
+		targetPath, ocisAdminServicePassword)
+	return nil
+}
+
+func stringPrompt(label string) string {
+	input := ""
+	reader := bufio.NewReader(os.Stdin)
+	for {
+		fmt.Fprint(os.Stderr, label+" ")
+		input, _ = reader.ReadString('\n')
+		if input != "" {
+			break
+		}
+	}
+	return strings.TrimSpace(input)
+}