package diagram

import (
	"errors"
	"fmt"
	"sync"
)

// GraphOverview define struct of storage all circuit diagram topologic data
var GraphOverview sync.Map

// GetGraphMap define func of get circuit diagram topologic data by pageID
func GetGraphMap(pageID int64) (*Graph, error) {
	value, ok := GraphOverview.Load(pageID)
	if !ok {
		return nil, fmt.Errorf("can not find graph by pageID:%d", pageID)
	}
	graph, ok := value.(*Graph)
	if !ok {
		return nil, errors.New("convert to graph struct failed")
	}
	return graph, nil
}