pionize

'use strict';

const Promise = require('bluebird');
const fs = require('fs');
const crypto = require('crypto');
const gm = require('gm').subClass({imageMagick: true});
var base64 = require('node-base64-image');
const _ = require('lodash');

function ImageServiceService() {

pionize

fs.readdir(source, function (err, files) {
  if (err) {
    console.log('Error finding files: ' + err)
  } else {
    files.forEach(function (filename, fileIndex) {
      console.log(filename)
      gm(source + filename).size(function (err, values) {
        if (err) {
          console.log('Error identifying file size: ' + err)
        } else {

pionize

var Promise = require('bluebird');  
var fs = require('fs');  
Promise.promisifyAll(fs);
var myFile = '/tmp/test';  
fs.readFileAsync(myFile, 'utf8').then(function(txt) {  
    txt = txt + '\nAppended something!';
    fs.writeFile(myFile, txt);
}).then(function() {
    console.log('Appended text!');
}).catch(function(err) {

pionize

db.allDocs({
  include_docs: true,
  attachments: true
}).then(function (result) {
  var docs = result.rows;
  docs.forEach(function(element) {
    localdb.put(element.doc).then(function(response) {
      alert("Pulled doc with id " + element.doc._id + " and added to local db.");
    }).catch(function (err) {
      if (err.name == 'conflict') {

pionize

db.allDocs(...).then(function (resultOfAllDocs) {
  return localdb.put(...);
}).then(function (resultOfPut) {
  return localdb.get(...);
}).then(function (resultOfGet) {
  return localdb.put(...);
}).catch(function (err) {
  console.log(err);
});

pionize

// I want to remove() all docs
db.allDocs({include_docs: true}).then(function (result) {
  result.rows.forEach(function (row) {
    db.remove(row.doc);  
  });
}).then(function () {
  // I believe all docs have been removed()
});

pionize

db.allDocs({include_docs: true}).then(function (result) {
  return Promise.all(result.rows.map(function (row) {
    return db.remove(row.doc);
  }));
}).then(function (arrayOfResults) {
  // All docs have really been removed() now!
});

pionize

somePromise().then(function () {
  return anotherPromise();
}).then(function () {
  return yetAnotherPromise();
}).catch(console.log.bind(console));

pionize

// using Bluebird Promise
const Promise = require('bluebird');

new Promise(function (resolve, reject) {
  fs.readFile('myfile.txt', function (err, file) {
    if (err) {
      return reject(err);
    }
    resolve(file);
  });

pionize

somePromise().then(function () {
  someOtherPromise();
}).then(function () {/* ... */});