Adopt SummerCMS v0.1.1 admin features

Datepickers on native time.Time / lagoon.Date fields, file uploads on
materials, readings and class sessions managed from the course form
(course_id made nullable).

controllers/api/json.go

@@ -2,6 +2,15 @@ package api
 
 import "git.golem15.com/jakub/sm-bm-plugin/models"
 
+// idOf is the value of an optional id, 0 when it is nil. The API serves only
+// sessions and readings that have a course, so their course_id is set.
+func idOf(id *uint) uint {
+	if id == nil {
+		return 0
+	}
+	return *id
+}
+
 // courseRef is the short form of a course embedded in other records.
 type courseRef struct {
 	ID       uint    `json:"id"`
@@ -83,7 +92,7 @@ type meetingJSON struct {
 }
 
 func newMeetingJSON(m models.Meeting, sessions int64) meetingJSON {
-	return meetingJSON{ID: m.ID, Number: m.Number, StartsOn: string(m.StartsOn), EndsOn: string(m.EndsOn), Notes: m.Notes, SessionsCount: sessions}
+	return meetingJSON{ID: m.ID, Number: m.Number, StartsOn: m.StartsOn.String(), EndsOn: m.EndsOn.String(), Notes: m.Notes, SessionsCount: sessions}
 }
 
 // sessionJSON is one class session with its course.
@@ -104,10 +113,10 @@ type sessionJSON struct {
 func newSessionJSON(s models.ClassSession) sessionJSON {
 	out := sessionJSON{
 		ID:        s.ID,
-		CourseID:  s.CourseID,
+		CourseID:  idOf(s.CourseID),
 		MeetingID: s.MeetingID,
-		StartsAt:  string(s.StartsAt),
-		EndsAt:    string(s.EndsAt),
+		StartsAt:  models.FormatDateTime(s.StartsAt),
+		EndsAt:    models.FormatDateTime(s.EndsAt),
 		Room:      s.Room,
 		Kind:      s.Kind,
 		Notes:     s.Notes,
@@ -146,7 +155,7 @@ func newDeadlinesJSON(rows []models.Deadline) []deadlineJSON {
 		out = append(out, deadlineJSON{
 			ID:          d.ID,
 			Title:       d.Title,
-			DueAt:       string(d.DueAt),
+			DueAt:       models.FormatDateTime(d.DueAt),
 			Kind:        d.Kind,
 			Description: d.Description,
 			CourseID:    d.CourseID,
@@ -212,7 +221,7 @@ func newMaterialListJSON(m models.Material, files int64) materialListJSON {
 		FilesCount: files,
 	}
 	if m.PublishedAt != nil {
-		out.PublishedAt = string(*m.PublishedAt)
+		out.PublishedAt = models.FormatDateTime(*m.PublishedAt)
 	}
 	return out
 }