mirror of
https://github.com/diamondburned/arikawa.git
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331ec59dec
This commit gets rid of contain-it-all structs and instead opt for interface union types containing underlying concrete types with no overloading. The code is much more verbose by doing this, but the API is much nicer to use. The only disadvantage in that regard is the interface assertion being too verbose and risky for users at times.
111 lines
2.9 KiB
Go
111 lines
2.9 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/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.
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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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