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updateone.go
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updateone.go
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// Copyright (C) MongoDB, Inc. 2017-present.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may
// not use this file except in compliance with the License. You may obtain
// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
package findopt
import (
"time"
"reflect"
"github.com/mongodb/mongo-go-driver/core/option"
"github.com/mongodb/mongo-go-driver/core/session"
"github.com/mongodb/mongo-go-driver/mongo/mongoopt"
)
var updateOneBundle = new(UpdateOneBundle)
// UpdateOne represents all passable params for the updateOne() function.
type UpdateOne interface {
updateOne()
}
// UpdateOneOption represents the options for the updateOne() function.
type UpdateOneOption interface {
UpdateOne
ConvertUpdateOneOption() option.FindOneAndUpdateOptioner
}
// UpdateOneSession is the session for the updateOne() function
type UpdateOneSession interface {
UpdateOne
ConvertUpdateOneSession() *session.Client
}
// UpdateOneBundle is a bundle of FindOneAndUpdate options
type UpdateOneBundle struct {
option UpdateOne
next *UpdateOneBundle
}
// BundleUpdateOne bundles FindOneAndUpdate options
func BundleUpdateOne(opts ...UpdateOne) *UpdateOneBundle {
head := updateOneBundle
for _, opt := range opts {
newBundle := UpdateOneBundle{
option: opt,
next: head,
}
head = &newBundle
}
return head
}
func (uob *UpdateOneBundle) updateOne() {}
// ConvertUpdateOneOption implements the UpdateOne interface
func (uob *UpdateOneBundle) ConvertUpdateOneOption() option.FindOneAndUpdateOptioner { return nil }
// ArrayFilters adds an option to specify which array elements an update should apply.
func (uob *UpdateOneBundle) ArrayFilters(filters ...interface{}) *UpdateOneBundle {
bundle := &UpdateOneBundle{
option: ArrayFilters(filters...),
next: uob,
}
return bundle
}
// BypassDocumentValidation adds an option to allow the write to opt-out of document-level validation
func (uob *UpdateOneBundle) BypassDocumentValidation(b bool) *UpdateOneBundle {
bundle := &UpdateOneBundle{
option: BypassDocumentValidation(b),
next: uob,
}
return bundle
}
// Collation adds an option to specify a collation.
func (uob *UpdateOneBundle) Collation(collation *mongoopt.Collation) *UpdateOneBundle {
bundle := &UpdateOneBundle{
option: Collation(collation),
next: uob,
}
return bundle
}
// MaxTime adds an option to specify the max time to allow the query to run.
func (uob *UpdateOneBundle) MaxTime(d time.Duration) *UpdateOneBundle {
bundle := &UpdateOneBundle{
option: MaxTime(d),
next: uob,
}
return bundle
}
// Projection adds an option to limit the fields returned for all documents.
func (uob *UpdateOneBundle) Projection(projection interface{}) *UpdateOneBundle {
bundle := &UpdateOneBundle{
option: Projection(projection),
next: uob,
}
return bundle
}
// ReturnDocument adds an option to specify whether to return the updated or original document.
func (uob *UpdateOneBundle) ReturnDocument(rd mongoopt.ReturnDocument) *UpdateOneBundle {
bundle := &UpdateOneBundle{
option: ReturnDocument(rd),
next: uob,
}
return bundle
}
// Sort adds an option to specify the order in which to return results.
func (uob *UpdateOneBundle) Sort(sort interface{}) *UpdateOneBundle {
bundle := &UpdateOneBundle{
option: Sort(sort),
next: uob,
}
return bundle
}
// Upsert adds an option to specify whether to create a new document if no document matches the query.
func (uob *UpdateOneBundle) Upsert(b bool) *UpdateOneBundle {
bundle := &UpdateOneBundle{
option: Upsert(b),
next: uob,
}
return bundle
}
// Calculates the total length of a bundle, accounting for nested bundles.
func (uob *UpdateOneBundle) bundleLength() int {
if uob == nil {
return 0
}
bundleLen := 0
for ; uob != nil; uob = uob.next {
if uob.option == nil {
continue
}
if converted, ok := uob.option.(*UpdateOneBundle); ok {
// nested bundle
bundleLen += converted.bundleLength()
continue
}
if _, ok := uob.option.(FindSessionOpt); !ok {
bundleLen++
}
}
return bundleLen
}
// Unbundle unwinds and deduplicates the options used to create it and those
// added after creation into a single slice of options.
//
// The deduplicate parameter is used to determine if the bundle is just flattened or
// if we actually deduplicate options.
//
// Since a FindBundle can be recursive, this method will unwind all recursive FindBundles.
func (uob *UpdateOneBundle) Unbundle(deduplicate bool) ([]option.FindOneAndUpdateOptioner, *session.Client, error) {
options, sess, err := uob.unbundle()
if err != nil {
return nil, nil, err
}
if !deduplicate {
return options, sess, nil
}
// iterate backwards and make dedup slice
optionsSet := make(map[reflect.Type]struct{})
for i := len(options) - 1; i >= 0; i-- {
currOption := options[i]
optionType := reflect.TypeOf(currOption)
if _, ok := optionsSet[optionType]; ok {
// option already found
options = append(options[:i], options[i+1:]...)
continue
}
optionsSet[optionType] = struct{}{}
}
return options, sess, nil
}
// Helper that recursively unwraps bundle into slice of options
func (uob *UpdateOneBundle) unbundle() ([]option.FindOneAndUpdateOptioner, *session.Client, error) {
if uob == nil {
return nil, nil, nil
}
var sess *session.Client
listLen := uob.bundleLength()
options := make([]option.FindOneAndUpdateOptioner, listLen)
index := listLen - 1
for listHead := uob; listHead != nil; listHead = listHead.next {
if listHead.option == nil {
continue
}
// if the current option is a nested bundle, Unbundle it and add its options to the current array
if converted, ok := listHead.option.(*UpdateOneBundle); ok {
nestedOptions, s, err := converted.unbundle()
if err != nil {
return nil, nil, err
}
if s != nil && sess == nil {
sess = s
}
// where to start inserting nested options
startIndex := index - len(nestedOptions) + 1
// add nested options in order
for _, nestedOp := range nestedOptions {
options[startIndex] = nestedOp
startIndex++
}
index -= len(nestedOptions)
continue
}
switch t := listHead.option.(type) {
case UpdateOneOption:
options[index] = t.ConvertUpdateOneOption()
index--
case UpdateOneSession:
if sess == nil {
sess = t.ConvertUpdateOneSession()
}
}
}
return options, sess, nil
}
// String implements the Stringer interface
func (uob *UpdateOneBundle) String() string {
if uob == nil {
return ""
}
str := ""
for head := uob; head != nil && head.option != nil; head = head.next {
if converted, ok := head.option.(*UpdateOneBundle); ok {
str += converted.String()
continue
}
if conv, ok := head.option.(UpdateOneOption); !ok {
str += conv.ConvertUpdateOneOption().String() + "\n"
}
}
return str
}