README

This module uses hooks provided by ProcessWire to catch page edits and stores history data in a series of custom database tables, so that it can be later retrieved, reviewed, and restored.

Note that at module settings you can define which specific fieldtypes and fields to track and for which templates tracking values should be enabled. Right out of the box tracking is disabled for all templates and fields.

While editing a page with version control enabled, revision toggle (link which opens list of previous revisions) is shown for fields with earlier revisions available. From this list user can select a revision and rollback value of the field to that specific revision.

Supported fieldtypes and inputfields

All native ProcessWire fieldtypes and inputfields, apart from those that either don't directly store values at all (repeaters fields, fieldsets) or only store hashed values (password), should be supported by the time of this writing:

Email
Datetime
Text (regular and multi-language)
Textarea (regular and multi-language)
Page Title (regular and multi-language)
Checkbox
Integer
Float
URL
Page
Module
File
Image
Selector
Options

Supported third party fieldtypes:

ProFields Textareas

If a specific fieldtype isn't listed here, it doesn't necessarily mean that it's not supported; it just hasn't been tested yet. If you know a fieldtype that works properly with this module but isn't included here, please inform the author of this module via GitHub.

You can enable support for any installed fieldtypes locally by modifying the "Compatible fieldtypes" setting, which can be found under "Advanced Settings" in module configuration screen.

Following inputfields are confirmed to be supported:

TinyMCE
CKEditor (regular and inline mode)
Text (+ other inputfields using <input> HTML element, such as Email)
Textarea (+ other inputfields using regular <textarea> HTML element)
Select
File
Image
Selector

Requirements

Please note that this module requires ProcessWire 2.4.1 or a later version. If you're still running an earlier version of ProcessWire and would like to have a similar feature, please take a look at the Version Control for Text Fields module: https://github.com/teppokoivula/VersionControlForTextFields.

Getting started

Copy (or clone with git) VersionControl folder to /site/modules/, go to Admin > Modules, hit "Check for new modules" and install Version Control. Supporting modules Process Version Control and Page Snapshot are installed automatically.

After installing this module you need to configure it before anything really starts happening. Most configuration options (essentially templates and fields this module is switched on for) can be found from Admin > Modules > Version Control (module config.) Minor settings can be found from related Process modules config: Admin > Modules > Process Version Control.

Diff Match and Patch

The Diff Match and Patch libraries offer robust algorithms to perform the operations required for synchronizing plain text. In the scope of current module, the JavaScript implementation of Diff Match and Patch is used to render diff between different revisions of a field value.

Diff Match and Patch is copyright (c) 2006 Google Inc. and released under the Apache License, Version 2.0. For more information about this library, please visit http://code.google.com/p/google-diff-match-patch/.

License

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

(See included LICENSE file for full license text.)

teppokoivula / version-control

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