62 lines
1.7 KiB
Go
62 lines
1.7 KiB
Go
// Package strutil provides various utilities for manipulating strings
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package strutil
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import (
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"bytes"
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"time"
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)
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// PadRight returns a new string of a specified length in which the end of the current string is padded with spaces or with a specified Unicode character.
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func PadRight(str string, length int, pad byte) string {
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if len(str) >= length {
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return str
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}
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buf := bytes.NewBufferString(str)
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for i := 0; i < length-len(str); i++ {
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buf.WriteByte(pad)
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}
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return buf.String()
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}
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// PadLeft returns a new string of a specified length in which the beginning of the current string is padded with spaces or with a specified Unicode character.
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func PadLeft(str string, length int, pad byte) string {
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if len(str) >= length {
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return str
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}
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var buf bytes.Buffer
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for i := 0; i < length-len(str); i++ {
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buf.WriteByte(pad)
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}
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buf.WriteString(str)
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return buf.String()
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}
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// Resize resizes the string with the given length. It ellipses with '...' when the string's length exceeds
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// the desired length or pads spaces to the right of the string when length is smaller than desired
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func Resize(s string, length uint) string {
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n := int(length)
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if len(s) == n {
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return s
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}
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// Pads only when length of the string smaller than len needed
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s = PadRight(s, n, ' ')
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if len(s) > n {
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b := []byte(s)
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var buf bytes.Buffer
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for i := 0; i < n-3; i++ {
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buf.WriteByte(b[i])
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}
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buf.WriteString("...")
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s = buf.String()
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}
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return s
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}
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// PrettyTime returns the string representation of the duration. It rounds the time duration to a second and returns a "---" when duration is 0
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func PrettyTime(t time.Duration) string {
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if t == 0 {
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return "---"
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}
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return (t - (t % time.Second)).String()
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}
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