<dc:creator>GNU social development team</dc:creator>
<pubDate>Fri, 13 Aug 2021 13:37:42 +0100</pubDate></item>
<item><title>
Updates: Improve the Attachments system
</title><description><![CDATA[
<p>With the milestone "Port Media system from v2" we had ported the existing
attachment system. The fact is that this system wasn't good enough.</p>
<p>It's always important to start with the original code as that allows us
to review past decisions and understand all the corner cases.</p>
<p>Sadly, what motivated us to re-design the attachment system was the
non-considered corner cases.</p>
<p>Key commits:</p>
<ul>
<li><ahref="https://code.undefinedhackers.net/GNUsocial/gnu-social/commit/32ad5dbd74ebb369c4b3ed688e1fb78464fabe49">32ad5dbd74 - [ENTITY] Split Attachment in various new entities</a></li>
<li><ahref="https://code.undefinedhackers.net/GNUsocial/gnu-social/commit/c381e58d3307e7dd07abeb9cf5b3998e34f5bd48">c381e58d33 - [ENTITY] Refactor RemoteURL entities to Link</a></li>
</ul>
<p>The reasoning leading to these entities and structure is detailed in our
different books. These are automatically generated from the <ahref="https://code.undefinedhackers.net/GNUsocial/gnu-social/src/branch/v3/docs">source</a> using <ahref="https://rust-lang.github.io/mdBook/">mdBook</a>.</p>
<li>The <ahref="https://docs.gnusocial.rocks/developer">Developer</a> is both intended to guide third-party plugin developers and to make it easier of contributing to the code.</li>
<li>The <ahref="https://docs.gnusocial.rocks/designer">Designer</a> is the most recent of the four and came from a necessity of keeping some standardization between templates and ensuring the same principles are kept in mind when designing new themes.</li>
<ahref="https://code.undefinedhackers.net/GNUsocial/gnu-social/src/branch/v3/tests">tests</a>. And the coverage is available <ahref="https://coverage.gnusocial.rocks/">here</a>. At the time of writing the coverage has 98.76% code lines tested.</p>
<p>File Storage in GNU social is used for avatars, for notes containing
attachments, and for notes containing links (in which case is an Embed preview).
Notes can be created by local users or fetched from remote actors. Filehash is
used to reduce file duplication.</p>
<p>When a user shares a Link that uses OpenGraph tags or has an OEmbed provider,
the <ahref="https://code.undefinedhackers.net/GNUsocial/gnu-social/src/branch/v3/plugins/Embed">Embed plugin</a> generates a preview for it that may contain a thumbnail.</p>
<p>When a user shares a Link to an image, the <ahref="https://code.undefinedhackers.net/GNUsocial/gnu-social/src/branch/v3/plugins/StoreRemoteMedia">StoreRemoteMedia plugin</a> can fetch the
file and make it available as an attachment, and will generate a thumbnail.</p>
<p>When an image, video, or other file type is uploaded or retrieved, an Attachment
<li><ahref="https://code.undefinedhackers.net/GNUsocial/gnu-social/src/branch/v3/plugins/ImageEncoder">ImageEncoder</a>: Allows to compress, validate, rescale, and sanitize images using VIPS.</li>
<li><ahref="https://code.undefinedhackers.net/GNUsocial/gnu-social/src/branch/v3/plugins/VideoEncoder">VideoEncoder</a>: Allows to rescale gifs using FFMpeg.</li>
<p>Another helpful plugin is <ahref="https://code.undefinedhackers.net/GNUsocial/gnu-social/src/branch/v3/plugins/FileQuota">FileQuota</a> which ensures a user stays under the file quota.</p>