Files
htwkalender/backend/service/ical/icalFileGeneration.go

101 lines
3.2 KiB
Go

package ical
import (
"htwkalender/model"
"htwkalender/service/functions"
"htwkalender/service/names"
"time"
"github.com/jordic/goics"
)
// IcalModel local type for EmitICal function
type IcalModel struct {
Events model.Events
Mapping map[string]model.FeedCollection
}
// EmitICal implements the interface for goics
func (icalModel IcalModel) EmitICal() goics.Componenter {
europeTime, _ := time.LoadLocation("Europe/Berlin")
c := goics.NewComponent()
c.SetType("VCALENDAR")
c.AddProperty("VERSION", "2.0")
c.AddProperty("CALSCAL", "GREGORIAN")
c.AddProperty("TZID", "Europe/Berlin")
c.AddProperty("X-WR-CALNAME", "HTWK Kalender")
c.AddProperty("X-WR-TIMEZONE", "Europe/Berlin")
c.AddProperty("X-LIC-LOCATION", "Europe/Berlin")
for _, event := range icalModel.Events {
mapEntry, mappingFound := icalModel.Mapping[event.UUID]
s := goics.NewComponent()
s.SetType("VEVENT")
k, v := goics.FormatDateTime("DTEND;TZID=Europe/Berlin", event.End.Time().Local().In(europeTime))
s.AddProperty(k, v)
k, v = goics.FormatDateTime("DTSTART;TZID=Europe/Berlin", event.Start.Time().Local().In(europeTime))
s.AddProperty(k, v)
if mappingFound {
addPropertyIfNotEmpty(s, "SUMMARY", replaceNameIfUserDefined(&event, mapEntry))
addAlarmIfSpecified(s, event, mapEntry)
} else {
addPropertyIfNotEmpty(s, "SUMMARY", event.Name)
}
addPropertyIfNotEmpty(s, "DESCRIPTION", generateDescription(event))
addPropertyIfNotEmpty(s, "LOCATION", event.Rooms)
c.AddComponent(s)
}
return c
}
// if reminder is specified in the configuration for this event, an alarm will be added to the event
func addAlarmIfSpecified(s *goics.Component, event model.Event, mapping model.FeedCollection) {
if mapping.Reminder {
a := goics.NewComponent()
a.SetType("VALARM")
a.AddProperty("TRIGGER", "-PT15M")
a.AddProperty("ACTION", "DISPLAY")
a.AddProperty("DESCRIPTION", "Next course: "+replaceNameIfUserDefined(&event, mapping)+" in "+event.Rooms)
s.AddComponent(a)
}
}
// replaceNameIfUserDefined replaces the name of the event with the user defined name if it is not empty
// all contained template strings will be replaced with the corresponding values from the event
func replaceNameIfUserDefined(event *model.Event, mapping model.FeedCollection) string {
if !functions.OnlyWhitespace(mapping.UserDefinedName) {
return names.ReplaceTemplateSubStrings(mapping.UserDefinedName, *event)
}
return event.Name
}
// AddPropertyIfNotEmpty adds a property to the component if the value is not empty
// or contains only whitespaces
func addPropertyIfNotEmpty(component *goics.Component, key string, value string) {
if !functions.OnlyWhitespace(value) {
component.AddProperty(key, value)
}
}
func generateDescription(event model.Event) string {
var description string
if !functions.OnlyWhitespace(event.Notes) {
description += "Notizen: " + event.Notes + "\n"
}
if !functions.OnlyWhitespace(event.Prof) {
description += "Prof: " + event.Prof + "\n"
}
if !functions.OnlyWhitespace(event.Course) {
description += "Gruppe: " + event.Course + "\n"
}
if !functions.OnlyWhitespace(event.EventType) {
description += "Typ: " + event.EventType + event.Compulsory + "\n"
}
return description
}