feat: export a wallet in json

CHANGELOG.md

@@ -12,6 +12,7 @@ Which is based on [Keep A Changelog](http://keepachangelog.com/)
 - Use go module to get this software
 - Generate random password
 - Print the expiration time of TOTP code
+- Export a wallet in json
 
 ## Changed
 

gpm/cli.go

@@ -254,3 +254,14 @@ func (c *Cli) copyEntry() {
     }
   }
 }
+
+func (c *Cli) ExportWallet() {
+  c.loadWallet()
+
+  data, err := c.Wallet.Export()
+  if err != nil {
+    c.error(fmt.Sprintf("%s", err))
+  }
+
+  fmt.Println(data)
+}

gpm/main.go

@@ -37,6 +37,7 @@ var(
   DIGIT   = flag.Bool("digit", false, "use digit to generate a random password")
   LETTER  = flag.Bool("letter", false, "use letter to generate a random password")
   SPECIAL = flag.Bool("special", false, "use special chars to generate a random password")
+  EXPORT  = flag.Bool("export", false, "export a wallet in json format")
   HELP    = flag.Bool("help", false, "print this help message")
 )
 
@@ -61,5 +62,7 @@ func Run() {
     cli.updateEntry()
   } else if *DELETE {
     cli.deleteEntry()
+  } else if *EXPORT {
+    cli.ExportWallet()
   }
 }

gpm/wallet.go

@@ -189,3 +189,13 @@ func (w *Wallet) UpdateEntry(entry Entry) error {
 
   return fmt.Errorf("unknown error during the update")
 }
+
+// Export a wallet to json
+func (w *Wallet) Export() (string, error) {
+  data, err := json.Marshal(&w.Entries)
+  if err != nil {
+    return "", err
+  }
+
+  return string(data), nil
+}