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package templates
import (
"bytes"
"os/exec"
"strings"
"text/template"
"time"
)
var version string
// SetVersion initializes the aerc version displayed in template functions
func SetVersion(v string) {
version = v
}
// wrap allows to chain wrapText
func wrap(lineWidth int, text string) string {
return wrapText(text, lineWidth)
}
func wrapLine(text string, lineWidth int) string {
words := strings.Fields(text)
if len(words) == 0 {
return text
}
var wrapped strings.Builder
wrapped.WriteString(words[0])
spaceLeft := lineWidth - wrapped.Len()
for _, word := range words[1:] {
if len(word)+1 > spaceLeft {
wrapped.WriteRune('\n')
wrapped.WriteString(word)
spaceLeft = lineWidth - len(word)
} else {
wrapped.WriteRune(' ')
wrapped.WriteString(word)
spaceLeft -= 1 + len(word)
}
}
return wrapped.String()
}
func wrapText(text string, lineWidth int) string {
text = strings.ReplaceAll(text, "\r\n", "\n")
text = strings.TrimRight(text, "\n")
lines := strings.Split(text, "\n")
var wrapped strings.Builder
for _, line := range lines {
switch {
case line == "":
// deliberately left blank
case line[0] == '>':
// leave quoted text alone
wrapped.WriteString(line)
default:
wrapped.WriteString(wrapLine(line, lineWidth))
}
wrapped.WriteRune('\n')
}
return wrapped.String()
}
// quote prepends "> " in front of every line in text
func quote(text string) string {
text = strings.ReplaceAll(text, "\r\n", "\n")
text = strings.TrimRight(text, "\n")
lines := strings.Split(text, "\n")
var quoted strings.Builder
for _, line := range lines {
if line == "" {
quoted.WriteString(">\n")
continue
}
quoted.WriteString("> ")
quoted.WriteString(line)
quoted.WriteRune('\n')
}
return quoted.String()
}
// cmd allow to parse reply by shell command
// text have to be passed by cmd param
// if there is error, original string is returned
func cmd(cmd, text string) string {
var out bytes.Buffer
c := exec.Command("sh", "-c", cmd)
c.Stdin = strings.NewReader(text)
c.Stdout = &out
err := c.Run()
if err != nil {
return text
}
return out.String()
}
func toLocal(t time.Time) time.Time {
return time.Time.In(t, time.Local)
}
var templateFuncs = template.FuncMap{
"quote": quote,
"wrapText": wrapText,
"wrap": wrap,
"dateFormat": time.Time.Format,
"toLocal": toLocal,
"exec": cmd,
"version": func() string { return version },
}
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