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81 lines
1.8 KiB
81 lines
1.8 KiB
// Copyright (C) MongoDB, Inc. 2017-present.
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may
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// not use this file except in compliance with the License. You may obtain
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// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
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// Package tag provides a way to define filters for tagged servers.
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package tag // import "go.mongodb.org/mongo-driver/tag"
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import (
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"bytes"
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"fmt"
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)
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// Tag is a name/vlaue pair.
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type Tag struct {
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Name string
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Value string
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}
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// String returns a human-readable human-readable description of the tag.
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func (tag Tag) String() string {
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return fmt.Sprintf("%s=%s", tag.Name, tag.Value)
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}
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// NewTagSetFromMap creates a new tag set from a map.
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func NewTagSetFromMap(m map[string]string) Set {
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var set Set
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for k, v := range m {
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set = append(set, Tag{Name: k, Value: v})
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}
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return set
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}
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// NewTagSetsFromMaps creates new tag sets from maps.
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func NewTagSetsFromMaps(maps []map[string]string) []Set {
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sets := make([]Set, 0, len(maps))
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for _, m := range maps {
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sets = append(sets, NewTagSetFromMap(m))
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}
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return sets
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}
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// Set is an ordered list of Tags.
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type Set []Tag
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// Contains indicates whether the name/value pair exists in the tagset.
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func (ts Set) Contains(name, value string) bool {
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for _, t := range ts {
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if t.Name == name && t.Value == value {
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return true
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}
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}
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return false
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}
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// ContainsAll indicates whether all the name/value pairs exist in the tagset.
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func (ts Set) ContainsAll(other []Tag) bool {
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for _, ot := range other {
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if !ts.Contains(ot.Name, ot.Value) {
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return false
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}
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}
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return true
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}
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// String returns a human-readable human-readable description of the tagset.
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func (ts Set) String() string {
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var b bytes.Buffer
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for i, tag := range ts {
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if i > 0 {
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b.WriteString(",")
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}
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b.WriteString(tag.String())
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}
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return b.String()
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}
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