87 lines
2.7 KiB
Go
87 lines
2.7 KiB
Go
// Copyright (c) 2026 Probo Inc <hello@getprobo.com>.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THIS SOFTWARE.
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package mailman
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import (
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"fmt"
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"time"
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"go.probo.inc/probo/pkg/gid"
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"go.probo.inc/probo/pkg/mail"
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"go.probo.inc/probo/pkg/statelesstoken"
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)
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const (
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TokenTypeUnsubscribe = "mailing_list_unsubscribe"
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TokenTypeConfirm = "mailing_list_confirm_subscription"
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unsubscribeTokenExpiry = 365 * 24 * time.Hour
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confirmTokenExpiry = 15 * 24 * time.Hour
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)
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type UnsubscribeTokenData struct {
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MailingListID gid.GID `json:"m"`
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Email mail.Addr `json:"e"`
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}
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func newUnsubscribeToken(secret string, mailingListID gid.GID, recipientEmail mail.Addr) (string, error) {
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return statelesstoken.NewToken(
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secret,
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TokenTypeUnsubscribe,
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unsubscribeTokenExpiry,
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UnsubscribeTokenData{
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MailingListID: mailingListID,
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Email: recipientEmail,
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},
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)
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}
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func ValidateUnsubscribeToken(secret, tokenString string) (*UnsubscribeTokenData, error) {
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payload, err := statelesstoken.ValidateToken[UnsubscribeTokenData](secret, TokenTypeUnsubscribe, tokenString)
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if err != nil {
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return nil, fmt.Errorf("cannot validate unsubscribe token: %w", err)
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}
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return &payload.Data, nil
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}
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type ConfirmTokenData struct {
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MailingListID gid.GID `json:"m"`
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Email mail.Addr `json:"e"`
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}
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func newConfirmToken(secret string, mailingListID gid.GID, recipientEmail mail.Addr) (string, error) {
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return statelesstoken.NewToken(
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secret,
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TokenTypeConfirm,
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confirmTokenExpiry,
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ConfirmTokenData{
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MailingListID: mailingListID,
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Email: recipientEmail,
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},
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)
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}
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// ValidateConfirmToken validates a subscription confirmation token and returns
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// the embedded payload. Exported so the HTTP handler can use it.
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func ValidateConfirmToken(secret, tokenString string) (*ConfirmTokenData, error) {
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payload, err := statelesstoken.ValidateToken[ConfirmTokenData](secret, TokenTypeConfirm, tokenString)
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if err != nil {
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return nil, fmt.Errorf("cannot validate confirm token: %w", err)
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}
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return &payload.Data, nil
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}
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