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package nostr
// Tag represents a single Nostr tag, which is an array of strings.
// The first element is the tag key, followed by its values.
type Tag []string
// Key returns the tag key (first element), or empty string if tag is empty.
func (t Tag) Key() string {
if len(t) == 0 {
return ""
}
return t[0]
}
// Value returns the first value (second element), or empty string if not present.
func (t Tag) Value() string {
if len(t) < 2 {
return ""
}
return t[1]
}
// Tags represents a collection of tags.
type Tags []Tag
// Find returns the first tag matching the given key, or nil if not found.
func (tags Tags) Find(key string) Tag {
for _, tag := range tags {
if tag.Key() == key {
return tag
}
}
return nil
}
// FindAll returns all tags matching the given key.
func (tags Tags) FindAll(key string) Tags {
var result Tags
for _, tag := range tags {
if tag.Key() == key {
result = append(result, tag)
}
}
return result
}
// GetD returns the value of the "d" tag, used for addressable events.
func (tags Tags) GetD() string {
tag := tags.Find("d")
if tag == nil {
return ""
}
return tag.Value()
}
// ContainsValue checks if any tag with the given key contains the specified value.
func (tags Tags) ContainsValue(key, value string) bool {
for _, tag := range tags {
if tag.Key() == key && tag.Value() == value {
return true
}
}
return false
}
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