React Native：如何解析ics / ical文件

Question

What is the best way to parse an ical / ics file? I have it all in a string, but I cant find a package or library that is compatible with RN. All the general JS or Node ones throw errors about the FS package missing. I am reading it in from a URL and have it all in memory so I don't even need file system access.

Answer 1

I was not able to find any such module. Here is the basic code I used to solve this issue:

var request = new XMLHttpRequest();
    request.open(
      "GET",
      "https://calendar.google.com/calendar/ical/en.usa%23holiday%40group.v.calendar.google.com/public/basic.ics",
      true
    );
    request.send(null);
    request.onreadystatechange = function() {
      if (request.readyState === 4 && request.status === 200) {
        var type = request.getResponseHeader("Content-Type");
        if (type.indexOf("text") !== 1) {
          var lines = request.responseText.split("\n");
          var events = {}
          var events_i = 0;
          for (i = 0; i < lines.length; i++) {
            if (lines[i].includes('DTSTART')) {
              var date = lines[i].split(":");
              events[events_i] = {date: date[1]};
            }
            else if (lines[i].includes('SUMMARY')) {
              var title = lines[i].split(":");
              events[events_i]["title"] = title[1];
            }
            else if (lines[i].includes('END:VEVENT')) {
              events_i++;
            }
          }
          console.log(events);
        }
      }
    };

Answer 2

Anyone looking for the answer to this question in 2019+, I've written an npm module to solve this problem! You can find it here ! ( https://github.com/Christop406/ical-parser ).

Or, if you're lazy, just run npm i cal-parser ( NOT ical-parser ).

You can use it like this:

const ical = require('cal-parser');

var parsedCal = ical.parseString(MY_ICAL_STRING);

console.log(parsedCal.calendarData); // for calendar metadata
console.log(parsedCal.events);       // for calendar events

Happy parsing!