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112 lines
3 KiB
Go
112 lines
3 KiB
Go
package discord
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import (
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"strconv"
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"strings"
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"time"
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)
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// Epoch is the Discord epoch constant in time.Duration (nanoseconds)
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// since Unix epoch.
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const Epoch = 1420070400000 * time.Millisecond
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// DurationSinceEpoch returns the duration from the Discord epoch to current.
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func DurationSinceEpoch(t time.Time) time.Duration {
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return time.Duration(t.UnixNano()) - Epoch
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}
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//go:generate go run ../utils/cmd/gensnowflake -o snowflake_types.go AppID AttachmentID AuditLogEntryID ChannelID CommandID EmojiID GuildID IntegrationID InteractionID MessageID RoleID StageID StickerID StickerPackID TeamID UserID WebhookID
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// Mention generates the mention syntax for this channel ID.
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func (s ChannelID) Mention() string { return "<#" + s.String() + ">" }
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// Mention generates the mention syntax for this role ID.
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func (s RoleID) Mention() string { return "<@&" + s.String() + ">" }
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// Mention generates the mention syntax for this user ID.
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func (s UserID) Mention() string { return "<@" + s.String() + ">" }
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// Snowflake is the format of Discord's ID type. It is a format that can be
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// sorted chronologically.
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type Snowflake uint64
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// NullSnowflake gets encoded into a null. This is used for
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// optional and nullable snowflake fields.
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const NullSnowflake = ^Snowflake(0)
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// NewSnowflake creates a new snowflake from the given time.
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func NewSnowflake(t time.Time) Snowflake {
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return Snowflake((DurationSinceEpoch(t) / time.Millisecond) << 22)
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}
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// ParseSnowflake parses a snowflake.
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func ParseSnowflake(sf string) (Snowflake, error) {
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if sf == "null" {
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return NullSnowflake, nil
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}
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u, err := strconv.ParseUint(sf, 10, 64)
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if err != nil {
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return 0, err
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}
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return Snowflake(u), nil
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}
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func (s *Snowflake) UnmarshalJSON(v []byte) error {
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p, err := ParseSnowflake(strings.Trim(string(v), `"`))
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if err != nil {
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return err
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}
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*s = p
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return nil
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}
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func (s Snowflake) MarshalJSON() ([]byte, error) {
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// This includes 0 and null, because MarshalJSON does not dictate when a
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// value gets omitted.
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if !s.IsValid() {
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return []byte("null"), nil
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} else {
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return []byte(`"` + strconv.FormatInt(int64(s), 10) + `"`), nil
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}
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}
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// String returns the ID, or nothing if the snowflake isn't valid.
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func (s Snowflake) String() string {
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// Check if negative.
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if !s.IsValid() {
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return ""
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}
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return strconv.FormatUint(uint64(s), 10)
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}
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// IsValid returns whether or not the snowflake is valid.
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func (s Snowflake) IsValid() bool {
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return !(int64(s) == 0 || s == NullSnowflake)
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}
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// IsNull returns whether or not the snowflake is null. This method is rarely
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// ever useful; most people should use IsValid instead.
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func (s Snowflake) IsNull() bool {
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return s == NullSnowflake
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}
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func (s Snowflake) Time() time.Time {
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unixnano := time.Duration(s>>22)*time.Millisecond + Epoch
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return time.Unix(0, int64(unixnano))
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}
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func (s Snowflake) Worker() uint8 {
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return uint8(s & 0x3E0000 >> 17)
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}
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func (s Snowflake) PID() uint8 {
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return uint8(s & 0x1F000 >> 12)
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}
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func (s Snowflake) Increment() uint16 {
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return uint16(s & 0xFFF)
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}
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