Download more information about sub-albums and their content

[oparoz]

From @oparoz on March 3, 2016 22:40

Feature request

User type: All

User level: All

Description

With Pictures, the first step was to download information about the whole cloud to memory, which meant that if you had thousands of files, you would run into problems on some platforms.

In order to improve the performance of Gallery, the app now loads:

• Information about all images in the current album
• Information about max 4 images in the sub-albums
• No information about albums. The name is extracted from the path leading to an image

We could improve this by downloading information about:

• all images in the current album
• all images in the sub-albums
• all sub-albums

  Benefit / value

• We could do some true conflict resolution when moving images, before having to send them to the back-end
• We could properly sort albums by date
• Name sorting for albums would actually sort the images used as representation using the full list instead of only sorting the 4 images we have
• It would make it possible to only turn albums with write permission into drop targets
• The album cover could be updated after a move

  Risk / caveats

Example A

The top album contains 20 sub-albums and 300 images Each sub-album contains 200 images

We currently load and array containing 300 + (20 x 4) = 380 references

With the new model, we would load 300 + 20 + (20 x 200) = 4320...

There may be a performance penalty when sorting or switching albums.

Sponsorship

None

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Copied from original issue: owncloud/gallery#557

[oparoz]

Retrieving additional information about sub-albums could be a first step

[oparoz]

First step implemented in #593