117 lines
3.1 KiB
Go
117 lines
3.1 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 mailactions
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import (
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"errors"
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"html/template"
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"net/http"
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"net/url"
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"go.probo.inc/probo/pkg/mailman"
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)
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func unsubscribeGetHandler() http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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token := r.URL.Query().Get("token")
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if token == "" {
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renderPage(
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w,
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http.StatusBadRequest,
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page{
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Title: "Invalid link",
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Heading: "Invalid link",
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Body: "This unsubscribe link is missing required information. Please use the link from your email.",
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},
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)
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return
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}
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renderPage(
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w,
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http.StatusOK,
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page{
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Title: "Unsubscribe",
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Heading: "Unsubscribe from mailing list",
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Body: "Click the button below to confirm that you no longer want to receive updates.",
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Form: &form{
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ActionURL: template.URL("?token=" + url.QueryEscape(token)),
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Button: "Confirm unsubscribe",
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Danger: true,
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},
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},
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)
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}
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}
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func unsubscribePostHandler(mailmanSvc *mailman.Service, tokenSecret string) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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token := r.URL.Query().Get("token")
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if token == "" {
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renderPage(
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w,
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http.StatusBadRequest,
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page{
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Title: "Invalid link",
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Heading: "Invalid link",
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Body: "This unsubscribe link is missing required information. Please use the link from your email.",
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},
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)
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return
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}
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data, err := mailman.ValidateUnsubscribeToken(tokenSecret, token)
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if err != nil {
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renderPage(
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w,
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http.StatusUnauthorized,
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page{
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Title: "Invalid link",
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Heading: "Invalid or expired link",
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Body: "This unsubscribe link is invalid or has expired.",
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},
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)
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return
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}
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if err := mailmanSvc.UnsubscribeByEmail(r.Context(), data.MailingListID, data.Email); err != nil {
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if !errors.Is(err, mailman.ErrSubscriberNotFound) {
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renderPage(
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w,
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http.StatusInternalServerError,
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page{
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Title: "Something went wrong",
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Heading: "Something went wrong",
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Body: "We could not process your request. Please try again later.",
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},
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)
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return
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}
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}
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// Also success when already unsubscribed — unsubscribe is idempotent
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// per RFC 8058.
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renderPage(
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w,
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http.StatusOK,
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page{
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Title: "Unsubscribed",
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Heading: "You've been unsubscribed",
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Body: "You will no longer receive updates.",
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},
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)
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}
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}
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