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29 lines
826 B
Go
29 lines
826 B
Go
package driver
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import "time"
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// Convert a string in [time.RFC3339Nano] format into a [time.Time]
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// if it roundtrips back to the same string.
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// This way times can be persisted to, and recovered from, the database,
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// but if a string is needed, [database/sql] will recover the same string.
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func maybeTime(text string) (_ time.Time, _ bool) {
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// Weed out (some) values that can't possibly be
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// [time.RFC3339Nano] timestamps.
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if len(text) < len("2006-01-02T15:04:05Z") {
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return
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}
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if len(text) > len(time.RFC3339Nano) {
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return
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}
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if text[4] != '-' || text[10] != 'T' || text[16] != ':' {
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return
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}
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// Slow path.
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var buf [len(time.RFC3339Nano)]byte
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date, err := time.Parse(time.RFC3339Nano, text)
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if err == nil && text == string(date.AppendFormat(buf[:0], time.RFC3339Nano)) {
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return date, true
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}
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return
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}
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