facebook-birthday-responder.js

const facebook = require("facebook-chat-api");
const birthdayWishes = require("./birthday-wishes.json");
const schedule = require("node-schedule");
const fs = require("fs");

function sendGreetings() {
  facebook(
    { email: process.env.USERNAME, password: process.env.PASSWORD },
    (error, api) => {
      if (error) throw error;
      // fs.writeFileSync("appstate.json", JSON.stringify(api.getAppState()));

      api.getFriendsList((error, friends) => {
        if (error) throw error;
        let friendsWithBirthdays = friends.filter(friend => {
          return friend.isBirthday === true && friend.userID !== "0";
        });
        console.log(friendsWithBirthdays);
        friendsWithBirthdays.forEach(friend => {
          api.sendMessage(
            {
              body: birthdayWishes[0]
            },
            friend.userID,
            (error, messageInfo) => {
              if (error) throw error;
              console.log(
                "Sent birthday greeting to",
                friend.fullName,
                messageInfo
              );
            }
          );
        });
      });
    }
  );
}

let notifier = schedule.scheduleJob("0 10 * * *", sendGreetings);

@bsodmike birthday-wishes.json would just be [ "text" ].