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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 options
import "time"
// CountOptions represents all possible options to the Count() function.
type CountOptions struct {
Collation *Collation // Specifies a collation
Hint interface{} // The index to use
Limit *int64 // The maximum number of documents to count
MaxTime *time.Duration // The maximum amount of time to allow the operation to run
Skip *int64 // The number of documents to skip before counting
}
// Count returns a pointer to a new CountOptions
func Count() *CountOptions {
return &CountOptions{}
}
// SetCollation specifies a collation
// Valid for server versions >= 3.4
func (co *CountOptions) SetCollation(c *Collation) *CountOptions {
co.Collation = c
return co
}
// SetHint specifies the index to use
func (co *CountOptions) SetHint(h interface{}) *CountOptions {
co.Hint = h
return co
}
// SetLimit specifies the maximum number of documents to count
func (co *CountOptions) SetLimit(i int64) *CountOptions {
co.Limit = &i
return co
}
// SetMaxTime specifies the maximum amount of time to allow the operation to run
func (co *CountOptions) SetMaxTime(d time.Duration) *CountOptions {
co.MaxTime = &d
return co
}
// SetSkip specifies the number of documents to skip before counting
func (co *CountOptions) SetSkip(i int64) *CountOptions {
co.Skip = &i
return co
}
// MergeCountOptions combines the argued CountOptions into a single CountOptions in a last-one-wins fashion
func MergeCountOptions(opts ...*CountOptions) *CountOptions {
countOpts := Count()
for _, co := range opts {
if co == nil {
continue
}
if co.Collation != nil {
countOpts.Collation = co.Collation
}
if co.Hint != nil {
countOpts.Hint = co.Hint
}
if co.Limit != nil {
countOpts.Limit = co.Limit
}
if co.MaxTime != nil {
countOpts.MaxTime = co.MaxTime
}
if co.Skip != nil {
countOpts.Skip = co.Skip
}
}
return countOpts
}
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