meteor__coursera-meteor-2/client/chat_message.js

Template.chat_message.helpers({
  sender: function () {
    const me = Meteor.userId();

    let result;
    if (this.message.sender === me) {
      if (me) {
        result = Meteor.user();
      }
      else {
        result = {
          profile: {
            username: "Anonymous",
            avatar: "anonymous.png"
          }
        };
      }
    }
    else if (this.message.sender === this.other._id) {
      result = this.other;
    }
    else {
      result = {
        profile: {
          username: `Unknown user ${this.message.sender}.`,
          avatar: "ghost.png"
        }
      };
    }
    console.log("returning", result);
    return result;
  }
});