package main

import (
	"encoding/xml"
	"io"
)

// Config is the over all body for mapping the references to be synchronized
type Config struct {
	XMLName  xml.Name  `xml:"config"`
	SyncRefs []SyncRef `xml:"refs>ref"`
	Groups   []Group   `xml:"groups>group"`
}

// Group defines a set of references that changes will be propogated within
type Group struct {
	XMLName  xml.Name `xml:"group"`
	ID       string   `xml:"id,attr"`
	Active   bool     `xml:"active,attr"`
	Contains []string `xml:"contains>refID"`
}

// SyncRef is a reference to a location to be synchronized from/to
type SyncRef struct {
	XMLName  xml.Name `xml:"ref"`
	ID       string   `xml:"id,attr"`
	URI      string
	ReadOnly bool
	Deletes  bool
}

// ReadConfig Parses a Config from an input
func ReadConfig(r io.Reader) (*Config, error) {
	dec := xml.NewDecoder(r)
	config := Config{}
	if err := dec.Decode(&config); err != nil {
		return nil, err
	}
	return &config, nil
}

// WriteConfig marshals the Config to output w
func WriteConfig(w io.Writer, config Config) error {
	enc := xml.NewEncoder(w)
	enc.Indent("", "  ")
	return enc.Encode(config)
}