fda3f43e7c
This stops the ui being blocked while the resource is opened. The wait ensures that resources are reclaimed when the process finishes while aerc is still running.
121 lines
2.9 KiB
Go
121 lines
2.9 KiB
Go
package msg
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import (
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"bufio"
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"errors"
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"net/url"
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"strings"
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"git.sr.ht/~sircmpwn/aerc/lib"
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"git.sr.ht/~sircmpwn/aerc/models"
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"git.sr.ht/~sircmpwn/aerc/widgets"
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)
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// Unsubscribe helps people unsubscribe from mailing lists by way of the
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// List-Unsubscribe header.
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type Unsubscribe struct{}
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func init() {
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register(Unsubscribe{})
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}
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// Aliases returns a list of aliases for the :unsubscribe command
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func (Unsubscribe) Aliases() []string {
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return []string{"unsubscribe"}
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}
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// Complete returns a list of completions
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func (Unsubscribe) Complete(aerc *widgets.Aerc, args []string) []string {
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return nil
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}
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// Execute runs the Unsubscribe command
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func (Unsubscribe) Execute(aerc *widgets.Aerc, args []string) error {
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if len(args) != 1 {
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return errors.New("Usage: unsubscribe")
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}
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widget := aerc.SelectedTab().(widgets.ProvidesMessage)
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msg, err := widget.SelectedMessage()
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if err != nil {
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return err
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}
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headers := msg.RFC822Headers
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if !headers.Has("list-unsubscribe") {
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return errors.New("No List-Unsubscribe header found")
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}
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methods := parseUnsubscribeMethods(headers.Get("list-unsubscribe"))
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aerc.Logger().Printf("found %d unsubscribe methods", len(methods))
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for _, method := range methods {
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aerc.Logger().Printf("trying to unsubscribe using %v", method)
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switch method.Scheme {
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case "mailto":
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return unsubscribeMailto(aerc, method)
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case "http", "https":
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return unsubscribeHTTP(method)
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default:
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aerc.Logger().Printf("skipping unrecognized scheme: %s", method.Scheme)
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}
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}
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return errors.New("no supported unsubscribe methods found")
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}
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// parseUnsubscribeMethods reads the list-unsubscribe header and parses it as a
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// list of angle-bracket <> deliminated URLs. See RFC 2369.
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func parseUnsubscribeMethods(header string) (methods []*url.URL) {
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r := bufio.NewReader(strings.NewReader(header))
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for {
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// discard until <
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_, err := r.ReadSlice('<')
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if err != nil {
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return
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}
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// read until <
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m, err := r.ReadSlice('>')
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if err != nil {
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return
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}
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m = m[:len(m)-1]
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if u, err := url.Parse(string(m)); err == nil {
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methods = append(methods, u)
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}
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}
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}
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func unsubscribeMailto(aerc *widgets.Aerc, u *url.URL) error {
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widget := aerc.SelectedTab().(widgets.ProvidesMessage)
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acct := widget.SelectedAccount()
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defaults := map[string]string{
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"To": u.Opaque,
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"Subject": u.Query().Get("subject"),
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}
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composer, err := widgets.NewComposer(
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aerc,
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acct,
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aerc.Config(),
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acct.AccountConfig(),
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acct.Worker(),
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"",
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defaults,
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models.OriginalMail{},
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)
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if err != nil {
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return err
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}
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composer.SetContents(strings.NewReader(u.Query().Get("body")))
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tab := aerc.NewTab(composer, "unsubscribe")
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composer.OnHeaderChange("Subject", func(subject string) {
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if subject == "" {
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tab.Name = "unsubscribe"
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} else {
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tab.Name = subject
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}
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tab.Content.Invalidate()
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})
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return nil
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}
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func unsubscribeHTTP(u *url.URL) error {
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lib.OpenFile(u.String(), nil)
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return nil
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}
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