mirror of
https://blitiri.com.ar/repos/chasquid
synced 2026-10-29 15:02:30 +00:00
Alberto Bertogli
8d763f450d
This is a follow-up on the `go fix` run in commit
0210c5fd92.
That commit recorded the automated updates.
This one applies further simplifications that are mechanical and do not
involve logic changes, but are outside of what `go fix` did.
It also removes some now-obsolete comments and statements.
53 lines
1.2 KiB
Go
53 lines
1.2 KiB
Go
// Package envelope implements functions related to handling email envelopes
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// (basically tuples of (from, to, data).
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package envelope
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import (
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"fmt"
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"strings"
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"blitiri.com.ar/go/chasquid/internal/set"
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)
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// Split an user@domain address into user and domain.
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func Split(addr string) (string, string) {
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user, domain, _ := strings.Cut(addr, "@")
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return user, domain
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}
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// UserOf user@domain returns user.
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func UserOf(addr string) string {
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user, _ := Split(addr)
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return user
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}
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// DomainOf user@domain returns domain.
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func DomainOf(addr string) string {
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_, domain := Split(addr)
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return domain
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}
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// DomainIn checks that the domain of the address is on the given set.
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func DomainIn(addr string, locals *set.String) bool {
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domain := DomainOf(addr)
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if domain == "" {
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return true
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}
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return locals.Has(domain)
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}
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// AddHeader adds (prepends) a MIME header to the message.
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func AddHeader(data []byte, k, v string) []byte {
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if len(v) > 0 {
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// If the value contains newlines, indent them properly.
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if v[len(v)-1] == '\n' {
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v = v[:len(v)-1]
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}
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v = strings.ReplaceAll(v, "\n", "\n\t")
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}
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header := []byte(fmt.Sprintf("%s: %s\n", k, v))
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return append(header, data...)
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}
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