Query mapper dsl prototype

q.go

package q

import (
	"sql"

	"github.com/google/uuid"
)

func MI(table, col string, ptr any) *MappedIdentifier {
	return &MappedIdentifier{table, col, ptr}
}

type MappedIdentifier struct {
	table string
	col   string
	ptr   any
}

type Node interface {
	Gql() string
	Db() *MappedIdentifier
	Children() []Node
}

type Foo struct {
	gql      string
	db       *MappedIdentifier
	children []Node
}

func (f *Foo) Gql() string           { return f.gql }
func (f *Foo) Db() *MappedIdentifier { return f.db }
func (f *Foo) Children() []Node      { return f.children }

type Bar struct {
	gql string
	db  *MappedIdentifier
}

func (f *Bar) Gql() string           { return f.gql }
func (f *Bar) Db() *MappedIdentifier { return f.db }
func (f *Bar) Children() []Node      { return []Node{} }

var (
	datavansRel  uuid.NullUUID
	datavansName sql.NullString
	devicesRel   uuid.NullUUID
	devicesName  sql.NullString
)

var tree Node = &Foo{
	"datavans",
	MI("datavans", "id", &datavansRel),
	[]Node{
		&Bar{"id", MI("datavans", "id", &datavansRel)},
		&Bar{"name", MI("datavans", "name", &datavansName)},
		&Foo{
			"devices",
			MI("devices", "id", &devicesRel),
			[]Node{
				&Bar{"id", MI("devices", "id", &devicesRel)},
				&Bar{"name", MI("devices", "name", &devicesName)},
			},
		},
	},
}