changed: make form updates propagate quicker in offline-capable views,

kobotoolbox#156

CHANGELOG.md

@@ -2,8 +2,11 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http:https://semver.org/).
 
-[Unreleased]
+[1.20.2] - 2015-11-02
 ---------------------
+##### Changed
+- Make form updates propagate quicker in offline webform views.
+
 ##### Fixed
 - Themes with hyphen in name do not register.
 - A label or hint that contains a \<span\> element without other markdown is not rendered as HTML.

package.json

@@ -2,7 +2,7 @@
  "name": "enketo-express",
  "description": "A simplified version of Enketo Smart Paper that requires a constant connection to the server.",
  "homepage": "",
- "version": "1.20.1",
+ "version": "1.20.2",
  "main": "./app.js",
  "repository": {
  "type": "git",

public/js/src/module/form-cache.js

@@ -16,7 +16,6 @@ function init( survey ) {
  return get( survey );
  } )
  .then( function( result ) {
-
  if ( result ) {
  return result;
  } else {
@@ -45,10 +44,13 @@ function remove( survey ) {
 function _setUpdateIntervals( survey ) {
  hash = survey.hash;
 
- // when it's pretty certain that the form has been rendered, check for form update
+ // Check for form update upon loading.
+ // Note that for large Xforms where the XSL transformation takes more than 30 seconds, 
+ // the first update make take 20 minutes to propagate to the browser of the very first user(s) 
+ // that open the form right after the XForm update.
  setTimeout( function() {
  _updateCache( survey );
- }, 3 * 60 * 1000 );
+ }, 30 * 1000 );
  // check for form update every 20 minutes
  setInterval( function() {
  _updateCache( survey );
@@ -194,7 +196,7 @@ function _updateCache( survey ) {
  connection.getFormPartsHash( survey )
  .then( function( version ) {
  if ( hash === version ) {
- console.debug( 'Cached survey is up to date!' );
+ console.debug( 'Cached survey is up to date!', hash );
  } else {
  console.debug( 'Cached survey is outdated! old:', hash, 'new:', version );
  return connection.getFormParts( survey )