GitLab

* A1111 import: Set VAE name

This patch sets the VAE name for the `VAELoader` when present in the png
metadata.

* A1111 import: Skip all hashes

When importing from A1111 the parsing assumes that values of a key will
never contain a ":", which is not correct.

There are 2 cases where we can have ":" in the value:

- Inside a string. E.g.:
  Lora hashes: "xl_more_art-full_v1: fe3b4816be83, add-detail-xl: 9c783c8ce46c"

- When the value is a json dictionary. E.g.:
  Hashes: {"vae": "63aeecb90f", "embed:negativeXL_D": "fff5d51ab6"}

This patch changes how we parse the metadata to take those 2 cases into
account and also skips the following additional keys that are present in
some Forge images:

- Version
- VAE hash
- TI hashes
- Lora hashes
- Hashes

* A1111 import: Parse Hires steps

This patch parses the `Hires steps` parameter that is part of the High
Resolution Upscale configuration when it  is present, and fallbacks to
the one from the `samplerNode` (like the code currently does) if it's
not present.