blocks capable of mutating

[penta-quark-neutro]

I'm currently working on an extension with blocks that can mutate; in other words, they change their structure.
Even though I've achieved that, I'm having the problem that when I save and load a project, the modified structures are lost, even though the inputs still exist, they're just not visible.
Does anyone have any idea how to make a block save its altered state and not load the normal one when loading a project?
before saving

after saving

[milkyestway]

maybe when loading the extension you can make a little script set up all of the blocks(I don't know if you can do that)? Nethertheless it is very cool!

[penta-quark-neutro]

I've tried unsuccessfully before, but I know I haven't done enough testing; I don't really know how the blocks are loaded and created.

[LegoBrainBiker]

save any block data in extension storage and re-mutate the blocks in runtime.on("PROJECT_LOADED",...
PS I like your Boolean shadows, scratch should do that for all Booleans

[penta-quark-neutro]

How should I use runtime.on("PROJECT LOADED",...) to mutate the blocks?
From what little I could gather, I should use util.target.blocks._blocks[util.thread.peekStack()] to get the block's inputs and mutate it accordingly.

[LegoBrainBiker]

from your original post, it looks like you are already figured out mutating the block, and just need to figure out how to save those changes. what I am suggesting is that you save any mutations you made in extension storage along with the block's id, and whenever the project is loaded you apply the mutations again the same way you did the first time. alternatively, you could try to store the mutations in the block's json, but that would be more difficult. you wouldn't be able to use util because that is only available when the blocks are run, not when the project is loaded.

[CST1229]

blockly mutations CAN be used if you're willing to do some monkeypatching to add a property on the extension getInfo to actually set it (as seen in my Extendable Blocks extension)