6a6ece03e4
A new minimal CardDAV plugin is introduced. It injects a list of e-mail addresses in the e-mail compose view. References: https://todo.sr.ht/~sircmpwn/koushin/7
117 lines
3 KiB
Go
117 lines
3 KiB
Go
package koushincarddav
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import (
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"fmt"
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"net/http"
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"net/url"
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"git.sr.ht/~emersion/koushin"
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koushinbase "git.sr.ht/~emersion/koushin/plugins/base"
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"github.com/emersion/go-vcard"
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"github.com/emersion/go-webdav/carddav"
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)
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type authRoundTripper struct {
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upstream http.RoundTripper
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session *koushin.Session
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}
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func (rt *authRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
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rt.session.SetHTTPBasicAuth(req)
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return rt.upstream.RoundTrip(req)
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}
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func newPlugin(srv *koushin.Server) (koushin.Plugin, error) {
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u, err := srv.Upstream("https", "http+insecure")
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if _, ok := err.(*koushin.NoUpstreamError); ok {
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srv.Logger().Print("carddav: no upstream server provided")
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return nil, nil
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} else if err != nil {
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return nil, fmt.Errorf("carddav: failed to parse upstream CardDAV server: %v", err)
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}
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if u.Scheme == "http+insecure" {
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u.Scheme = "http"
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}
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if u.Scheme == "" {
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s, err := carddav.Discover(u.Host)
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if err != nil {
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srv.Logger().Printf("carddav: failed to discover CardDAV server: %v", err)
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return nil, nil
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}
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u, err = url.Parse(s)
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if err != nil {
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return nil, fmt.Errorf("carddav: Discover returned an invalid URL: %v", err)
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}
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}
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srv.Logger().Printf("Configured upstream CardDAV server: %v", u)
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p := koushin.GoPlugin{Name: "carddav"}
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p.Inject("compose.html", func(ctx *koushin.Context, _data koushin.RenderData) error {
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data := _data.(*koushinbase.ComposeRenderData)
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rt := authRoundTripper{
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upstream: http.DefaultTransport,
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session: ctx.Session,
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}
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c, err := carddav.NewClient(&http.Client{Transport: &rt}, u.String())
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if err != nil {
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return fmt.Errorf("failed to create CardDAV client: %v", err)
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}
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principal, err := c.FindCurrentUserPrincipal()
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if err != nil {
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return fmt.Errorf("failed to query CardDAV principal: %v", err)
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}
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addressBookHomeSet, err := c.FindAddressBookHomeSet(principal)
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if err != nil {
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return fmt.Errorf("failed to query CardDAV address book home set: %v", err)
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}
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addressBooks, err := c.FindAddressBooks(addressBookHomeSet)
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if err != nil {
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return fmt.Errorf("failed to query CardDAV address books: %v", err)
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}
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if len(addressBooks) == 0 {
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return nil
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}
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addressBook := addressBooks[0]
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query := carddav.AddressBookQuery{
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DataRequest: carddav.AddressDataRequest{
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Props: []string{vcard.FieldFormattedName, vcard.FieldEmail},
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},
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}
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addrs, err := c.QueryAddressBook(addressBook.Path, &query)
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if err != nil {
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return fmt.Errorf("failed to query CardDAV addresses: %v", err)
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}
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// TODO: cache the results
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emails := make([]string, 0, len(addrs))
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for _, addr := range addrs {
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cardEmails := addr.Card.Values(vcard.FieldEmail)
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emails = append(emails, cardEmails...)
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}
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data.Extra["EmailSuggestions"] = emails
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return nil
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})
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return p.Plugin(), nil
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}
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func init() {
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koushin.RegisterPluginLoader(func(s *koushin.Server) ([]koushin.Plugin, error) {
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p, err := newPlugin(s)
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if err != nil {
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return nil, err
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}
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if p == nil {
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return nil, nil
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}
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return []koushin.Plugin{p}, err
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})
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}
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