This adds support for retrieving partial header and body blocks straight from the email, and
therefore support to pull the References header from a message (which, for some reason, IMAP
doesn't support or include in the FETCH ENVELOPE command). This is necessary for email conversations (#3808).
This required a change to the database schema, meaning old databases will need to be blown
away before starting.
The entire database module now uses Transactions in order to guarantee atomicity of all
operations. However, due to limitations in SQLHeavy and its implementation of async, we
can't use it (and SQLite's) transactional models. This patch introduces a rather hamhanded
transactional model where the entire database is locked for each request using a
NonblockingMutex. This is the safest approach, but certainly not an optimal one. When
SQLHeavy's code is in place, hopefully we can rip this out with a minimum of fuss.
Needed to rethink storage strategies as I researched this and realized that a true scarce database -- where the database is sparsely populated both in columns and rows -- is not feasible due to IMAP's UID rules. The strategy now means that the database rows are contiguous from the highest (newest) message to the oldest *requested by the user*. This is a better situation than having to download the UID for the entire folder.
The code base is growing much faster than expected, faster than Shotwell it seems (not necessarily line count, but files and necessary organization of the library vs. Shotwell's initial flat directory). After some thought decided to move to a more standard Vala/GTK naming scheme of all lowercase with dashes for spaces starting with namespace (minus the "geary-", unless the class was in the topmost namespace). Three motivations:
1. Often confusing when working on code to see three "Folder.vala" in the gedit tabs: one IMAP, one SQLite, and one the interface definition.
2. This paves the way for waf integration, as right now we're held up using it because it barfs on projects with two files of the same name in different directories.
3. I find the CamelCase in the file browser becoming hard on the eyes, and this scheme seems a little more browsable.
2011-06-27 11:24:39 -07:00
Renamed from src/engine/sqlite/MessageTable.vala (Browse further)
