vareversat / gics

Go module implementing the RFC5545 standard, facilitating the creation and use of iCalendars on the Internet

GICS 📅

Warning

There is still plenty work to do on this project. This package may be uses in a production environment at your own risks !

This project is intended to implement the RFC5545 - Internet Calendaring and Scheduling Core Object Specification ( you can find the Request Of Comments here)

The genesis 🧠

I decided to create this go module because existing options didn't meet my needs or were no longer maintained.

Main features 🚀

Here the main features this module offers (some are already available ✅ and some are still in WIP state 🟧)

• ✅ Create an iCalendar object
  • ✅ With VEVENT components
  • ✅ With VALARM components
  • ✅ With VJOURNAL components
  • ✅ With VFREEBUSY components
  • ✅ With VTIMEZONE components
  • ✅ With VTODO components
• 🟧 Make use of all properties available
• 🟧 Make use of all types available
• 🟧 Parse an iCalendar file
• ✅ Write in an iCalendar file

Installation

To install gics, use the go get command:

go get github.com/vareversat/gics

Type representations

Type name	Go type
BINARY	string (base64 representation)
BOOLEAN	bool
CAL-ADDRESS	uri.URL
DATE	time.Time
DATE-TIME	time.Time
DURATION	string
FLOAT	float32
INTEGER	int32
PERIOD	time.Time / time.Time
RECUR	complex
TEXT	string
TIME	time.Time
URI	uri.URL
UTC-OFFSET	string

Example

• Create and display an iCalendar

package main

import (
  "github.com/vareversat/gics"
  "github.com/vareversat/gics/components"
  "github.com/vareversat/gics/properties"
  "github.com/vareversat/gics/types"
  "os"
  "time"
)

func main() {
  // Create an array of VEVENT component
  calendarComponents := components.CalendarComponents{}
  // Create a VEVENT component
  c := components.NewEventCalendarComponent(
    properties.NewUidProperty("My_EVENT"),
    properties.NewDateTimeStampProperty(time.Now().UTC()),
    []components.AlarmCalendarComponent{}, // Empty VALARM
    properties.NewDateTimeStartProperty(time.Now(), types.WithUtcTime),
    properties.NewDescriptionProperty("This is an event of my calendar !"))
  calendarComponents = append(calendarComponents, c)

  // Create an iCalendar with the previously created VEVENT
  calendar, err := gics.NewCalendar(calendarComponents,
    "-//Valentin REVERSAT//https://github.com/vareversat/gics//FR",
    "PUBLISH",
    "2.0")
  if err != nil {
    panic(err)
  } else {
    // Print the iCalendar in the stdout
    calendar.SerializeToICSFormat(os.Stdout)
  }
}