Adding status and command files

console/command.go

@@ -0,0 +1,60 @@
+package console
+
+
+import (
+	"fmt"
+	"reflect"
+	"path/filepath"
+)
+
+
+
+// Console Command interface
+type Commander interface {
+	FromArgs(args []string)	error 		// Load data from os arguments or flag.Args()
+	usage(string)		string		// usage message
+	defaults()		error		// set default field values
+	idxArgsToFields()	map[int]string	// field's index position in command arguments
+	RpcMethod()		string		// Method which should be called remotely
+	RpcParams()		interface{}	// Parameters to send out on rpc
+	RpcResult()		interface{}	// Only requirement is to have a String method to print on console
+}
+
+
+// Set command fields based on indexes defined in default()
+func CmdFieldsFromArgs( cmd Commander, args []string ) {
+	for idx := range args {
+		fldName, hasIdx := cmd.idxArgsToFields()[idx]
+		if !hasIdx {
+			continue
+		}
+		// field defined to be set by os.Args index
+		if fld := reflect.ValueOf(cmd).Elem().FieldByName(fldName); fld.Kind() == reflect.String {
+			fld.SetString(args[idx])
+		} else if fld.Kind() == reflect.Int {
+			fld.SetInt(1) // Placeholder for future usage of data types other than strings
+		}
+	}
+}
+
+// Process args and return right command Value or error
+func GetCommandValue( args []string ) ( Commander, error ) {
+	if len(args) < 2 {
+                return nil, fmt.Errorf( "usage: %s <command>\n", filepath.Base(args[0]) )
+        }
+        cmd := args[1]
+        var cmdVal Commander
+	switch cmd {
+	case "status":
+		cmdVal = &CmdStatus{}
+	case "get_balance":
+		cmdVal = &CmdGetBalance{}
+	default:
+		return nil, fmt.Errorf( "usage: %s <command>\n", filepath.Base(args[0]) )
+	}
+	if err := cmdVal.FromArgs(args); err != nil {
+		return nil, err
+        }
+	return cmdVal, nil
+}
+