107 lines
2.2 KiB
Go
107 lines
2.2 KiB
Go
package definition
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// Emoji is a data structure that holds a single emoji.
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type Emoji struct {
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// Name is a name of this emoji.
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Name string
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// ShortNames is a shorter representation of this emoji.
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ShortNames []string
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// Unicode is an unicode representation of this emoji.
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Unicode []rune
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}
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// NewEmoji returns a new Emoji.
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func NewEmoji(name string, unicode []rune, shortNames ...string) Emoji {
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if len(shortNames) == 0 {
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panic("Emoji must have at least 1 short name.")
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}
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if len(unicode) == 0 {
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unicode = []rune{0xFFFD}
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}
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return Emoji{
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Name: name,
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ShortNames: shortNames,
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Unicode: unicode,
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}
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}
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// IsUnicode returns true if this emoji is defined in unicode, otherwise false.
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func (em *Emoji) IsUnicode() bool {
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return !(len(em.Unicode) == 1 && em.Unicode[0] == 0xFFFD)
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}
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// Emojis is a collection of emojis.
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type Emojis interface {
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// Get returns (*Emoji, true) if found mapping associated with given short name, otherwise (nil, false).
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Get(shortName string) (*Emoji, bool)
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// Add adds new emojis to this collection.
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Add(Emojis)
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// Clone clones this collection.
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Clone() Emojis
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}
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type emojis struct {
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list []Emoji
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m map[string]*Emoji
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children []Emojis
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}
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// NewEmojis returns a new Emojis.
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func NewEmojis(es ...Emoji) Emojis {
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m := &emojis{
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list: es,
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m: map[string]*Emoji{},
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children: []Emojis{},
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}
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for i := range es {
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emoji := &m.list[i]
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for _, s := range emoji.ShortNames {
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m.m[s] = emoji
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}
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}
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return m
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}
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func (m *emojis) Add(emojis Emojis) {
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m.children = append(m.children, emojis)
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}
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func (m *emojis) Clone() Emojis {
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es := &emojis{
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list: m.list,
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m: m.m,
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children: make([]Emojis, len(m.children)),
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}
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copy(es.children, m.children)
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return es
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}
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func (m *emojis) Get(shortName string) (*Emoji, bool) {
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v, ok := m.m[shortName]
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if ok {
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return v, ok
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}
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for _, es := range m.children {
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v, ok := es.Get(shortName)
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if ok {
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return v, ok
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}
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}
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return nil, false
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}
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// EmojisOption sets options for Emojis.
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type EmojisOption func(Emojis)
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// WithEmojis is an EmojisOption that adds emojis to the Emojis.
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func WithEmojis(emojis ...Emoji) EmojisOption {
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return func(m Emojis) {
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m.Add(NewEmojis(emojis...))
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}
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}
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