mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-11-25 13:16:40 +00:00
1e7b32490d
This allows for building GoToSocial with [SQLite transpiled to WASM](https://github.com/ncruces/go-sqlite3) and accessed through [Wazero](https://wazero.io/).
355 lines
9.1 KiB
Go
355 lines
9.1 KiB
Go
package sqlite3
|
|
|
|
import (
|
|
"math"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/ncruces/go-sqlite3/internal/util"
|
|
"github.com/ncruces/julianday"
|
|
)
|
|
|
|
// TimeFormat specifies how to encode/decode time values.
|
|
//
|
|
// See the documentation for the [TimeFormatDefault] constant
|
|
// for formats recognized by SQLite.
|
|
//
|
|
// https://sqlite.org/lang_datefunc.html
|
|
type TimeFormat string
|
|
|
|
// TimeFormats recognized by SQLite to encode/decode time values.
|
|
//
|
|
// https://sqlite.org/lang_datefunc.html#time_values
|
|
const (
|
|
TimeFormatDefault TimeFormat = "" // time.RFC3339Nano
|
|
|
|
// Text formats
|
|
TimeFormat1 TimeFormat = "2006-01-02"
|
|
TimeFormat2 TimeFormat = "2006-01-02 15:04"
|
|
TimeFormat3 TimeFormat = "2006-01-02 15:04:05"
|
|
TimeFormat4 TimeFormat = "2006-01-02 15:04:05.000"
|
|
TimeFormat5 TimeFormat = "2006-01-02T15:04"
|
|
TimeFormat6 TimeFormat = "2006-01-02T15:04:05"
|
|
TimeFormat7 TimeFormat = "2006-01-02T15:04:05.000"
|
|
TimeFormat8 TimeFormat = "15:04"
|
|
TimeFormat9 TimeFormat = "15:04:05"
|
|
TimeFormat10 TimeFormat = "15:04:05.000"
|
|
|
|
TimeFormat2TZ = TimeFormat2 + "Z07:00"
|
|
TimeFormat3TZ = TimeFormat3 + "Z07:00"
|
|
TimeFormat4TZ = TimeFormat4 + "Z07:00"
|
|
TimeFormat5TZ = TimeFormat5 + "Z07:00"
|
|
TimeFormat6TZ = TimeFormat6 + "Z07:00"
|
|
TimeFormat7TZ = TimeFormat7 + "Z07:00"
|
|
TimeFormat8TZ = TimeFormat8 + "Z07:00"
|
|
TimeFormat9TZ = TimeFormat9 + "Z07:00"
|
|
TimeFormat10TZ = TimeFormat10 + "Z07:00"
|
|
|
|
// Numeric formats
|
|
TimeFormatJulianDay TimeFormat = "julianday"
|
|
TimeFormatUnix TimeFormat = "unixepoch"
|
|
TimeFormatUnixFrac TimeFormat = "unixepoch_frac"
|
|
TimeFormatUnixMilli TimeFormat = "unixepoch_milli" // not an SQLite format
|
|
TimeFormatUnixMicro TimeFormat = "unixepoch_micro" // not an SQLite format
|
|
TimeFormatUnixNano TimeFormat = "unixepoch_nano" // not an SQLite format
|
|
|
|
// Auto
|
|
TimeFormatAuto TimeFormat = "auto"
|
|
)
|
|
|
|
// Encode encodes a time value using this format.
|
|
//
|
|
// [TimeFormatDefault] and [TimeFormatAuto] encode using [time.RFC3339Nano],
|
|
// with nanosecond accuracy, and preserving any timezone offset.
|
|
//
|
|
// This is the format used by the [database/sql] driver:
|
|
// [database/sql.Row.Scan] will decode as [time.Time]
|
|
// values encoded with [time.RFC3339Nano].
|
|
//
|
|
// Time values encoded with [time.RFC3339Nano] cannot be sorted as strings
|
|
// to produce a time-ordered sequence.
|
|
//
|
|
// Assuming that the time zones of the time values are the same (e.g., all in UTC),
|
|
// and expressed using the same string (e.g., all "Z" or all "+00:00"),
|
|
// use the TIME [collating sequence] to produce a time-ordered sequence.
|
|
//
|
|
// Otherwise, use [TimeFormat7] for time-ordered encoding.
|
|
//
|
|
// Formats [TimeFormat1] through [TimeFormat10]
|
|
// convert time values to UTC before encoding.
|
|
//
|
|
// Returns a string for the text formats,
|
|
// a float64 for [TimeFormatJulianDay] and [TimeFormatUnixFrac],
|
|
// or an int64 for the other numeric formats.
|
|
//
|
|
// https://sqlite.org/lang_datefunc.html
|
|
//
|
|
// [collating sequence]: https://sqlite.org/datatype3.html#collating_sequences
|
|
func (f TimeFormat) Encode(t time.Time) any {
|
|
switch f {
|
|
// Numeric formats
|
|
case TimeFormatJulianDay:
|
|
return julianday.Float(t)
|
|
case TimeFormatUnix:
|
|
return t.Unix()
|
|
case TimeFormatUnixFrac:
|
|
return float64(t.Unix()) + float64(t.Nanosecond())*1e-9
|
|
case TimeFormatUnixMilli:
|
|
return t.UnixMilli()
|
|
case TimeFormatUnixMicro:
|
|
return t.UnixMicro()
|
|
case TimeFormatUnixNano:
|
|
return t.UnixNano()
|
|
// Special formats.
|
|
case TimeFormatDefault, TimeFormatAuto:
|
|
f = time.RFC3339Nano
|
|
// SQLite assumes UTC if unspecified.
|
|
case
|
|
TimeFormat1, TimeFormat2,
|
|
TimeFormat3, TimeFormat4,
|
|
TimeFormat5, TimeFormat6,
|
|
TimeFormat7, TimeFormat8,
|
|
TimeFormat9, TimeFormat10:
|
|
t = t.UTC()
|
|
}
|
|
return t.Format(string(f))
|
|
}
|
|
|
|
// Decode decodes a time value using this format.
|
|
//
|
|
// The time value can be a string, an int64, or a float64.
|
|
//
|
|
// Formats [TimeFormat8] through [TimeFormat10]
|
|
// (and [TimeFormat8TZ] through [TimeFormat10TZ])
|
|
// assume a date of 2000-01-01.
|
|
//
|
|
// The timezone indicator and fractional seconds are always optional
|
|
// for formats [TimeFormat2] through [TimeFormat10]
|
|
// (and [TimeFormat2TZ] through [TimeFormat10TZ]).
|
|
//
|
|
// [TimeFormatAuto] implements (and extends) the SQLite auto modifier.
|
|
// Julian day numbers are safe to use for historical dates,
|
|
// from 4712BC through 9999AD.
|
|
// Unix timestamps (expressed in seconds, milliseconds, microseconds, or nanoseconds)
|
|
// are safe to use for current events, from at least 1980 through at least 2260.
|
|
// Unix timestamps before 1980 and after 9999 may be misinterpreted as julian day numbers,
|
|
// or have the wrong time unit.
|
|
//
|
|
// https://sqlite.org/lang_datefunc.html
|
|
func (f TimeFormat) Decode(v any) (time.Time, error) {
|
|
switch f {
|
|
// Numeric formats.
|
|
case TimeFormatJulianDay:
|
|
switch v := v.(type) {
|
|
case string:
|
|
return julianday.Parse(v)
|
|
case float64:
|
|
return julianday.FloatTime(v), nil
|
|
case int64:
|
|
return julianday.Time(v, 0), nil
|
|
default:
|
|
return time.Time{}, util.TimeErr
|
|
}
|
|
|
|
case TimeFormatUnix, TimeFormatUnixFrac:
|
|
if s, ok := v.(string); ok {
|
|
f, err := strconv.ParseFloat(s, 64)
|
|
if err != nil {
|
|
return time.Time{}, err
|
|
}
|
|
v = f
|
|
}
|
|
switch v := v.(type) {
|
|
case float64:
|
|
sec, frac := math.Modf(v)
|
|
nsec := math.Floor(frac * 1e9)
|
|
return time.Unix(int64(sec), int64(nsec)).UTC(), nil
|
|
case int64:
|
|
return time.Unix(v, 0).UTC(), nil
|
|
default:
|
|
return time.Time{}, util.TimeErr
|
|
}
|
|
|
|
case TimeFormatUnixMilli:
|
|
if s, ok := v.(string); ok {
|
|
i, err := strconv.ParseInt(s, 10, 64)
|
|
if err != nil {
|
|
return time.Time{}, err
|
|
}
|
|
v = i
|
|
}
|
|
switch v := v.(type) {
|
|
case float64:
|
|
return time.UnixMilli(int64(math.Floor(v))).UTC(), nil
|
|
case int64:
|
|
return time.UnixMilli(v).UTC(), nil
|
|
default:
|
|
return time.Time{}, util.TimeErr
|
|
}
|
|
|
|
case TimeFormatUnixMicro:
|
|
if s, ok := v.(string); ok {
|
|
i, err := strconv.ParseInt(s, 10, 64)
|
|
if err != nil {
|
|
return time.Time{}, err
|
|
}
|
|
v = i
|
|
}
|
|
switch v := v.(type) {
|
|
case float64:
|
|
return time.UnixMicro(int64(math.Floor(v))).UTC(), nil
|
|
case int64:
|
|
return time.UnixMicro(v).UTC(), nil
|
|
default:
|
|
return time.Time{}, util.TimeErr
|
|
}
|
|
|
|
case TimeFormatUnixNano:
|
|
if s, ok := v.(string); ok {
|
|
i, err := strconv.ParseInt(s, 10, 64)
|
|
if err != nil {
|
|
return time.Time{}, util.TimeErr
|
|
}
|
|
v = i
|
|
}
|
|
switch v := v.(type) {
|
|
case float64:
|
|
return time.Unix(0, int64(math.Floor(v))).UTC(), nil
|
|
case int64:
|
|
return time.Unix(0, v).UTC(), nil
|
|
default:
|
|
return time.Time{}, util.TimeErr
|
|
}
|
|
|
|
// Special formats.
|
|
case TimeFormatAuto:
|
|
switch s := v.(type) {
|
|
case string:
|
|
i, err := strconv.ParseInt(s, 10, 64)
|
|
if err == nil {
|
|
v = i
|
|
break
|
|
}
|
|
f, err := strconv.ParseFloat(s, 64)
|
|
if err == nil {
|
|
v = f
|
|
break
|
|
}
|
|
|
|
dates := []TimeFormat{
|
|
TimeFormat9, TimeFormat8,
|
|
TimeFormat6, TimeFormat5,
|
|
TimeFormat3, TimeFormat2, TimeFormat1,
|
|
}
|
|
for _, f := range dates {
|
|
t, err := f.Decode(s)
|
|
if err == nil {
|
|
return t, nil
|
|
}
|
|
}
|
|
}
|
|
switch v := v.(type) {
|
|
case float64:
|
|
if 0 <= v && v < 5373484.5 {
|
|
return TimeFormatJulianDay.Decode(v)
|
|
}
|
|
if v < 253402300800 {
|
|
return TimeFormatUnixFrac.Decode(v)
|
|
}
|
|
if v < 253402300800_000 {
|
|
return TimeFormatUnixMilli.Decode(v)
|
|
}
|
|
if v < 253402300800_000000 {
|
|
return TimeFormatUnixMicro.Decode(v)
|
|
}
|
|
return TimeFormatUnixNano.Decode(v)
|
|
case int64:
|
|
if 0 <= v && v < 5373485 {
|
|
return TimeFormatJulianDay.Decode(v)
|
|
}
|
|
if v < 253402300800 {
|
|
return TimeFormatUnixFrac.Decode(v)
|
|
}
|
|
if v < 253402300800_000 {
|
|
return TimeFormatUnixMilli.Decode(v)
|
|
}
|
|
if v < 253402300800_000000 {
|
|
return TimeFormatUnixMicro.Decode(v)
|
|
}
|
|
return TimeFormatUnixNano.Decode(v)
|
|
default:
|
|
return time.Time{}, util.TimeErr
|
|
}
|
|
|
|
case
|
|
TimeFormat2, TimeFormat2TZ,
|
|
TimeFormat3, TimeFormat3TZ,
|
|
TimeFormat4, TimeFormat4TZ,
|
|
TimeFormat5, TimeFormat5TZ,
|
|
TimeFormat6, TimeFormat6TZ,
|
|
TimeFormat7, TimeFormat7TZ:
|
|
s, ok := v.(string)
|
|
if !ok {
|
|
return time.Time{}, util.TimeErr
|
|
}
|
|
return f.parseRelaxed(s)
|
|
|
|
case
|
|
TimeFormat8, TimeFormat8TZ,
|
|
TimeFormat9, TimeFormat9TZ,
|
|
TimeFormat10, TimeFormat10TZ:
|
|
s, ok := v.(string)
|
|
if !ok {
|
|
return time.Time{}, util.TimeErr
|
|
}
|
|
t, err := f.parseRelaxed(s)
|
|
if err != nil {
|
|
return time.Time{}, err
|
|
}
|
|
return t.AddDate(2000, 0, 0), nil
|
|
|
|
default:
|
|
s, ok := v.(string)
|
|
if !ok {
|
|
return time.Time{}, util.TimeErr
|
|
}
|
|
if f == "" {
|
|
f = time.RFC3339Nano
|
|
}
|
|
return time.Parse(string(f), s)
|
|
}
|
|
}
|
|
|
|
func (f TimeFormat) parseRelaxed(s string) (time.Time, error) {
|
|
fs := string(f)
|
|
fs = strings.TrimSuffix(fs, "Z07:00")
|
|
fs = strings.TrimSuffix(fs, ".000")
|
|
t, err := time.Parse(fs+"Z07:00", s)
|
|
if err != nil {
|
|
return time.Parse(fs, s)
|
|
}
|
|
return t, nil
|
|
}
|
|
|
|
// Scanner returns a [database/sql.Scanner] that can be used as an argument to
|
|
// [database/sql.Row.Scan] and similar methods to
|
|
// decode a time value into dest using this format.
|
|
func (f TimeFormat) Scanner(dest *time.Time) interface{ Scan(any) error } {
|
|
return timeScanner{dest, f}
|
|
}
|
|
|
|
type timeScanner struct {
|
|
*time.Time
|
|
TimeFormat
|
|
}
|
|
|
|
func (s timeScanner) Scan(src any) error {
|
|
var ok bool
|
|
var err error
|
|
if *s.Time, ok = src.(time.Time); !ok {
|
|
*s.Time, err = s.Decode(src)
|
|
}
|
|
return err
|
|
}
|