meteor__coursera-meteor-2/client/main.js

// code that is only sent to the client
// main.js is loaded last:
// http://docs.meteor.com/#/full/structuringyourapp

// subscribe to read data
Meteor.subscribe("documents");
Meteor.subscribe("editingUsers");

Template.editor.helpers({
  // Return the id of the first document you can find.
  docid: function () {
    setupCurrentDocument();
    return Session.get("docid");
  },
  // Configure the CodeMirror editor.
  config: function () {
    return function (editor) {
      editor.setOption("lineNumbers", true);
      editor.setOption("theme", "cobalt");
      editor.setOption("mode", "html");
      // Set a callback that gets triggered whenever the user
      // makes a change in the code editing window.
      editor.on("change", function (cmEditor /* , info */) {
        let $preview = $("#viewer_iframe");
        // Send the current code over to the iframe for rendering.
        $preview.contents().find("html").html(cmEditor.getValue());
        Meteor.call("addEditingUser", Session.get("docid"));
      });
    };
  }
});

Template.editingUsers.helpers({
  // Retrieve a list of users that are editing this document.
  users: function () {
    let doc = Documents.findOne({ _id: Session.get("docid") });
    if (!doc) {
      // Give up.
      return null;
    }
    let eUsers = EditingUsers.findOne({ docId: doc._id });
    if (!eUsers) {
      // Give up.
      return null;
    }
    let users = new Array();
    let i = 0;
    for (let userId in eUsers.users) {
      users[i] = fixObjectsKeys(eUsers.users[userId]);
      users[i]._id = userId;
      i++;
    }
    return users;
  }
});

Template.navbar.helpers({
  // Retrieve a list of documents.
  documents: function () {
    return Documents.find();
  }
});

Template.docMeta.helpers({
  // Find current document.
  document: function () {
    return Documents.findOne({ _id: Session.get("docid") });
  },
  // Test if a user is allowed to edit current doc.
  canEdit: function () {
    let doc = Documents.findOne({ _id: Session.get("docid") });
    return doc && doc.owner === Meteor.userId();
  },
  isPrivate: function () {
    let doc = Documents.findOne({ _id: Session.get("docid") });
    return !!(doc.isPrivate);
  }
});

Template.editableText.helpers({
  // Test if a user is allowed to edit current doc.
  userCanEdit: function (doc, collection) {
    Meteor._debug("userCanEdit", doc, collection);
    // Can edit if the document is owned by me.
    doc = Documents.findOne({
      _id: Session.get("docid"),
      owner: Meteor.userId()
    });
    return !!doc;
  }
});

Template.navbar.events({
  // Add doc button.
  "click .js-add-doc": function (event) {
    event.preventDefault();
    // User not available.
    if (!Meteor.user()) {
      alert("You need to login first!");
    }
    else {
      // They are logged in... lets insert a doc.
      Meteor.call("addDoc", function (err, res) {
        if (!err) {
          console.log("addDoc res", res);
          Session.set("docid", res);
        }
      });
    }
  },

  // Load doc button.
  "click .js-load-doc": function (event) {
    // This contains a complete document.
    Session.set("docid", this._id);
  }
});

Template.docMeta.events({
  // Change document privacy.
  "click .js-tog-private": function (event) {
    // They are logged in... lets insert a doc.
    const docid = Session.get("docid");
    if (docid) {
      const doc = { _id: docid, isPrivate: event.target.checked };
      Meteor.call("updateDocPrivacy", doc);
    }
  }
});

// Helper to make sure a doc is available.
function setupCurrentDocument() {
  let doc;
  // No docid set yet.
  if (!Session.get("docid")) {
    doc = Documents.findOne();
    if (doc) {
      Session.set("docid", doc._id);
    }
  }
}

// This renames object keys by removing hyphens to make them compatible
// with spacebars.
function fixObjectsKeys(obj) {
  let newObj = {};
  for (let key in obj) {
    if (obj.hasOwnProperty(key)) {
      const key2 = key.replace("-", "");
      newObj[key2] = obj[key];
    }
  }
  return newObj;
}