api/models/characters/edit.go

package characters

import (
	"git.aiterp.net/rpdata/api/models"
	"github.com/globalsign/mgo/bson"
)

// Edit sets the fields of metadata. Only non-empty and different fields will be set in the
// database, preventing out of order edits to two fields from conflicting
func Edit(character models.Character, name, shortName, description *string) (models.Character, error) {
	changes := bson.M{}

	if name != nil && *name != character.Name {
		character.Name = *name
		changes["name"] = *name
	}
	if shortName != nil && *shortName != character.ShortName {
		character.ShortName = *shortName
		changes["shortName"] = *shortName
	}
	if description != nil && *description != character.Description {
		character.Description = *description
		changes["description"] = *description
	}

	if len(changes) == 0 {
		return character, nil
	}

	err := collection.UpdateId(character.ID, bson.M{"$set": changes})
	if err != nil {
		return models.Character{}, err
	}

	return character, nil
}