Add xxx_installer::upgrade($version) method so that upgrade stanzas
are separate from install stanzas. In the old code, to do an upgrade
meant that you had to re-evolve everything from the initial install
because we'd step through each version's changes. But what we really
want is for the initial install to start off in the perfect initial
state, and the upgrades to do the work behind the scenes. So now the
install() function gets things set up properly the first time, and the
upgrade() function does any work to catch you up to the latest code.
See gallery_installer.php for a good example.
Install: <module>_installer::install() is called, any necessary tables
are created.
Activate: <module>_installer::activate() is called. Module
controllers are routable, helpers are accessible, etc. The module is
in use.
Deactivate: <module>_installer::deactivate() is called. Module code
is not accessible or routable. Module is *not* in use, but its tables
are still around.
Uninstall: <module>_installer::uninstall() is called. Module is
completely removed from the database.
Admin > Modules will install and activate modules, but will only
deactivate (will NOT uninstall modules).
File_Structure_Test to make sure we don't regress.
According to the PHP docs, the "public" keyword is implied on static
functions, so remove it. Also, require private static functions to
start with an _.
http://php.net/manual/en/language.oop5.visibility.php
this to show a "your thumbs/resizes are out of date" message whenever
we change the graphics rules. Tweak watermark module to add graphics
rules whenever we make a change, which triggers the graphics module to
add the permanent message.
Track a set of rules in Graphics_Rule_Model which specify how we turn
original images into thumbnails and resizes. There's one set of rules
that applies to every image in the Gallery.
Track the state of thumbs and resizes with a "dirty" bit. The new
graphics helper manages the rules and can rebuild the thumbs and
resizes for any images that are considered "dirty".
Introduce the concept of an "album cover" which is an item that an
album points to. We'll use that item as the source for the album's
thumbnail/resize.
Conflated with this change (sorry!) I also changed the Var table to
use module_name instead of module_id. This may be marginally less
efficient, but it's much easier to follow in the database.
