yq/pkg/yqlib/lib.go

package yqlib

import (
	"fmt"

	logging "gopkg.in/op/go-logging.v1"
	yaml "gopkg.in/yaml.v3"
)

type UpdateCommand struct {
	Command string
	Path    string
	Value   *yaml.Node
}

type YqLib interface {
	DebugNode(node *yaml.Node)
	Get(rootNode *yaml.Node, path string) ([]MatchingNode, error)
	Update(rootNode *yaml.Node, updateCommand UpdateCommand) error
	New(path string) yaml.Node
}

type lib struct {
	navigator DataNavigator
	parser    PathParser
	log       *logging.Logger
}

func NewYqLib(l *logging.Logger) YqLib {
	return &lib{
		parser: NewPathParser(),
		log:    l,
	}
}

func (l *lib) DebugNode(node *yaml.Node) {
	navigator := NewDataNavigator(l.log, false)
	navigator.DebugNode(node)
}

func (l *lib) Get(rootNode *yaml.Node, path string) ([]MatchingNode, error) {
	var paths = l.parser.ParsePath(path)
	navigator := NewDataNavigator(l.log, true)
	return navigator.Get(rootNode, paths)
}

func (l *lib) New(path string) yaml.Node {
	var paths = l.parser.ParsePath(path)
	navigator := NewDataNavigator(l.log, false)
	newNode := yaml.Node{Kind: navigator.GuessKind(paths, 0)}
	return newNode
}

func (l *lib) Update(rootNode *yaml.Node, updateCommand UpdateCommand) error {
	navigator := NewDataNavigator(l.log, false)
	l.log.Debugf("%v to %v", updateCommand.Command, updateCommand.Path)
	switch updateCommand.Command {
	case "update":
		var paths = l.parser.ParsePath(updateCommand.Path)
		return navigator.Update(rootNode, paths, updateCommand.Value)
	case "delete":
		var paths = l.parser.ParsePath(updateCommand.Path)
		return navigator.Delete(rootNode, paths)
	default:
		return fmt.Errorf("Unknown command %v", updateCommand.Command)
	}

}