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Diffstat (limited to 'plugins/caldav')
-rw-r--r--plugins/caldav/caldav.go61
-rw-r--r--plugins/caldav/plugin.go71
-rw-r--r--plugins/caldav/public/calendar.html25
-rw-r--r--plugins/caldav/routes.go66
4 files changed, 223 insertions, 0 deletions
diff --git a/plugins/caldav/caldav.go b/plugins/caldav/caldav.go
new file mode 100644
index 0000000..1c043e9
--- /dev/null
+++ b/plugins/caldav/caldav.go
@@ -0,0 +1,61 @@
+package koushincaldav
+
+import (
+ "fmt"
+ "net/http"
+ "net/url"
+
+ "git.sr.ht/~emersion/koushin"
+ "github.com/emersion/go-webdav/caldav"
+)
+
+var errNoCalendar = fmt.Errorf("caldav: no calendar found")
+
+type authRoundTripper struct {
+ upstream http.RoundTripper
+ session *koushin.Session
+}
+
+func (rt *authRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
+ rt.session.SetHTTPBasicAuth(req)
+ return rt.upstream.RoundTrip(req)
+}
+
+func newClient(u *url.URL, session *koushin.Session) (*caldav.Client, error) {
+ rt := authRoundTripper{
+ upstream: http.DefaultTransport,
+ session: session,
+ }
+ c, err := caldav.NewClient(&http.Client{Transport: &rt}, u.String())
+ if err != nil {
+ return nil, fmt.Errorf("failed to create CalDAV client: %v", err)
+ }
+
+ return c, nil
+}
+
+func getCalendar(u *url.URL, session *koushin.Session) (*caldav.Client, *caldav.Calendar, error) {
+ c, err := newClient(u, session)
+ if err != nil {
+ return nil, nil, err
+ }
+
+ principal, err := c.FindCurrentUserPrincipal()
+ if err != nil {
+ return nil, nil, fmt.Errorf("failed to query CalDAV principal: %v", err)
+ }
+
+ calendarHomeSet, err := c.FindCalendarHomeSet(principal)
+ if err != nil {
+ return nil, nil, fmt.Errorf("failed to query CalDAV calendar home set: %v", err)
+ }
+
+ calendars, err := c.FindCalendars(calendarHomeSet)
+ if err != nil {
+ return nil, nil, fmt.Errorf("failed to find calendars: %v", err)
+ }
+ if len(calendars) == 0 {
+ return nil, nil, errNoCalendar
+ }
+ return c, &calendars[0], nil
+}
diff --git a/plugins/caldav/plugin.go b/plugins/caldav/plugin.go
new file mode 100644
index 0000000..1915646
--- /dev/null
+++ b/plugins/caldav/plugin.go
@@ -0,0 +1,71 @@
+package koushincaldav
+
+import (
+ "fmt"
+ "net/http"
+ "net/url"
+
+ "git.sr.ht/~emersion/koushin"
+)
+
+func sanityCheckURL(u *url.URL) error {
+ req, err := http.NewRequest(http.MethodOptions, u.String(), nil)
+ if err != nil {
+ return err
+ }
+
+ resp, err := http.DefaultClient.Do(req)
+ if err != nil {
+ return err
+ }
+ resp.Body.Close()
+
+ // Servers might require authentication to perform an OPTIONS request
+ if resp.StatusCode/100 != 2 && resp.StatusCode != http.StatusUnauthorized {
+ return fmt.Errorf("HTTP request failed: %v %v", resp.StatusCode, resp.Status)
+ }
+ return nil
+}
+
+func newPlugin(srv *koushin.Server) (koushin.Plugin, error) {
+ u, err := srv.Upstream("caldavs", "caldav+insecure", "https", "http+insecure")
+ if _, ok := err.(*koushin.NoUpstreamError); ok {
+ return nil, nil
+ } else if err != nil {
+ return nil, fmt.Errorf("caldav: failed to parse upstream caldav server: %v", err)
+ }
+ switch u.Scheme {
+ case "caldavs":
+ u.Scheme = "https"
+ case "caldav+insecure", "http+insecure":
+ u.Scheme = "http"
+ }
+ if u.Scheme == "" {
+ return nil, fmt.Errorf("caldav: discovery not yet implemented") // TODO
+ }
+
+ if err := sanityCheckURL(u); err != nil {
+ return nil, fmt.Errorf("caldav: failed to connect to CalDAV server %q: %v", u, err)
+ }
+
+ srv.Logger().Printf("Configured upstream CalDAV server: %v", u)
+
+ p := koushin.GoPlugin{Name: "caldav"}
+
+ registerRoutes(&p, u)
+
+ return p.Plugin(), nil
+}
+
+func init() {
+ koushin.RegisterPluginLoader(func(s *koushin.Server) ([]koushin.Plugin, error) {
+ p, err := newPlugin(s)
+ if err != nil {
+ return nil, err
+ }
+ if p == nil {
+ return nil, nil
+ }
+ return []koushin.Plugin{p}, err
+ })
+}
diff --git a/plugins/caldav/public/calendar.html b/plugins/caldav/public/calendar.html
new file mode 100644
index 0000000..6011f9e
--- /dev/null
+++ b/plugins/caldav/public/calendar.html
@@ -0,0 +1,25 @@
+{{template "head.html"}}
+
+<h1>koushin</h1>
+
+<p>
+ <a href="/">Back</a>
+</p>
+
+<h2>Calendar: {{.Calendar.Name}}</h2>
+
+{{if .Events}}
+ <ul>
+ {{range .Events}}
+ {{$event := index .Data.Events 0}}
+ <li>
+ <a href="/calendar/{{$event.UID | pathescape}}">{{$event.Summary}}</a>
+ ({{$event.StartDate | formatdate}} — {{$event.EndDate | formatdate}})
+ </li>
+ {{end}}
+ </ul>
+{{else}}
+ <p>No events.</p>
+{{end}}
+
+{{template "foot.html"}}
diff --git a/plugins/caldav/routes.go b/plugins/caldav/routes.go
new file mode 100644
index 0000000..acc879f
--- /dev/null
+++ b/plugins/caldav/routes.go
@@ -0,0 +1,66 @@
+package koushincaldav
+
+import (
+ "fmt"
+ "net/http"
+ "net/url"
+ "time"
+
+ "git.sr.ht/~emersion/koushin"
+ "github.com/emersion/go-webdav/caldav"
+)
+
+type CalendarRenderData struct {
+ koushin.BaseRenderData
+ Calendar *caldav.Calendar
+ Events []caldav.CalendarObject
+}
+
+func registerRoutes(p *koushin.GoPlugin, u *url.URL) {
+ p.GET("/calendar", func(ctx *koushin.Context) error {
+ // TODO: multi-calendar support
+ c, calendar, err := getCalendar(u, ctx.Session)
+ if err != nil {
+ return err
+ }
+
+ now := time.Now()
+ start := time.Date(now.Year(), now.Month(), 1, 0, 0, 0, 0, now.Location())
+ end := start.AddDate(0, 1, 0)
+
+ query := caldav.CalendarQuery{
+ CompRequest: caldav.CalendarCompRequest{
+ Name: "VCALENDAR",
+ Props: []string{"VERSION"},
+ Comps: []caldav.CalendarCompRequest{{
+ Name: "VEVENT",
+ Props: []string{
+ "SUMMARY",
+ "UID",
+ "DTSTART",
+ "DTEND",
+ "DURATION",
+ },
+ }},
+ },
+ CompFilter: caldav.CompFilter{
+ Name: "VCALENDAR",
+ Comps: []caldav.CompFilter{{
+ Name: "VEVENT",
+ Start: start,
+ End: end,
+ }},
+ },
+ }
+ events, err := c.QueryCalendar(calendar.Path, &query)
+ if err != nil {
+ return fmt.Errorf("failed to query calendar: %v", err)
+ }
+
+ return ctx.Render(http.StatusOK, "calendar.html", &CalendarRenderData{
+ BaseRenderData: *koushin.NewBaseRenderData(ctx),
+ Calendar: calendar,
+ Events: events,
+ })
+ })
+}