Added more props to caldav todos

Featurecreep.md

@@ -195,6 +195,7 @@ Sorry for some of them being in German, I'll tranlate them at some point.
   * [ ] Check if only needed things are queried from the db when accessing dav (for ex. no need to get all tasks when we actually only need the title)
   * [x] Fix OPTIONS Requests to the rest of the api being broken
   * [ ] Parse all props defined in rfc5545
+    * [ ] COMPLETED -> Need to actually save the time the task was completed
   * [ ] Tests
 
 ### Refactor 

docs/content/doc/usage/caldav.md

@@ -0,0 +1,53 @@
+---
+date: "2019-05-12:00:00+01:00"
+title: "Caldav"
+draft: false
+type: "doc"
+menu:
+  sidebar:
+    parent: "usage"
+---
+
+# Caldav
+
+Vikunja supports managing tasks via the [caldav VTODO](https://tools.ietf.org/html/rfc5545#section-3.6.2) extension.
+
+## URLs
+
+// TODO
+
+## Supported properties
+
+Vikunja currently supports the following properties:
+
+* `UID`
+* `SUMMARY`
+* `DESCRIPTION`
+* `PRIORITY`
+* `COMPLETED`
+* `DUE`
+* `DTSTART`
+* `DURATION`
+* `ORGANIZER`
+* `RELATED-TO`
+* `CREATED`
+* `DTSTAMP`
+* `LAST-MODIFIED`
+
+Vikunja **does currently not** support these properties:
+
+* `ATTACH`
+* `CATEGORIES`
+* `CLASS`
+* `COMMENT`
+* `GEO`
+* `LOCATION`
+* `PERCENT-COMPLETE`
+* `RESOURCES`
+* `STATUS`
+* `CONTACT`
+* `RECURRENCE-ID`
+* `URL`
+* Recurrence
+* `SEQUENCE`
+

pkg/caldav/caldav.go

@@ -19,6 +19,7 @@ package caldav
 import (
 	"code.vikunja.io/api/pkg/models"
 	"code.vikunja.io/api/pkg/utils"
+	"fmt"
 	"strconv"
 	"time"
 )
@@ -47,9 +48,12 @@ type Todo struct {
 	CompletedUnix int64
 	Organizer     *models.User
 	Priority      int64 // 0-9, 1 is highest
+	RelatedToUID  string
 
-	StartUnix int64
-	EndUnix   int64
+	StartUnix   int64
+	EndUnix     int64
+	DueDateUnix int64
+	Duration    time.Duration
 
 	CreatedUnix int64
 	UpdatedUnix int64 // last-mod
@@ -147,6 +151,26 @@ COMPLETED: ` + makeCalDavTimeFromUnixTime(t.CompletedUnix)
 ORGANIZER;CN=:` + t.Organizer.Username
 		}
 
+		if t.RelatedToUID != "" {
+			caldavtodos += `
+RELATED-TO:` + t.RelatedToUID
+		}
+
+		if t.DueDateUnix != 0 {
+			caldavtodos += `
+DUE:` + makeCalDavTimeFromUnixTime(t.DueDateUnix)
+		}
+
+		if t.CreatedUnix != 0 {
+			caldavtodos += `
+CREATED:` + makeCalDavTimeFromUnixTime(t.CreatedUnix)
+		}
+
+		if t.Duration != 0 {
+			caldavtodos += `
+DURATION:PT` + fmt.Sprintf("%.6f", t.Duration.Hours()) + `H` + fmt.Sprintf("%.6f", t.Duration.Minutes()) + `M` + fmt.Sprintf("%.6f", t.Duration.Seconds()) + `S`
+		}
+
 		caldavtodos += `
 PRIORITY:` + strconv.Itoa(int(t.Priority))
 

pkg/routes/caldav/parsing.go

@@ -82,9 +82,17 @@ func parseTaskFromVTODO(content string) (vTask *models.ListTask, err error) {
 	// FIXME: add more values to tasks
 	// @see https://tools.ietf.org/html/rfc5545#section-3.8
 	vTask = &models.ListTask{
-		Text:     task["SUMMARY"],
-		Priority: priority,
-		UID:      task["UID"],
+		Text:        task["SUMMARY"],
+		Description: task["DESCRIPTION"],
+		Priority:    priority,
+		UID:         task["UID"],
+
+		//DueDateUnix: task["DUE"],
+		//COMPLETED (datetime)
+		//StartDateUnix: task["DTSTART"]
+		// DURATION (startdate - enddate)
+		// DTSTAMP (last modified)
+
 	}
 
 	return