Hi everyone I was thinking of creating a backend module that has functione for a note taking app (search, sort, etc). So anyone can implement a ui on top of it.
I have some basic understanding of rust (made a just-working chip-8 emulator). But I’ve never used SQL or other database.
Is this plausible? Is there a similar project that I can use as reference? What are the mistakes I should avoid?


Plausible? Absolutely. The questions are what and why?
For notes, it seems like most people have settled on one of three things: org-mode, markdown, or free form plain text. There are some closed source tools that use a proprietary format, but fuck them.
So then the question becomes what does the backend do? Provide a way to query notes for links, topics, and todos? Keep a versioning system? Synchonization? Something else? Answer those questions and you have a project.
For references, take a look at nb, Joplin, Logseq, org-mode, anytype.