Don't write frontmatter to file if it is empty

[UtkarshVerma]

🚀 The feature, motivation and pitch

Currently, the plugin exposes note_frontmatter_func which is of the type fun(note:obsidian.Note):table. The table is prepended to the current buffer on save.

Now, when the table is empty, this results in an unnecessary addition of empty frontmatter at the top of the file.

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Other text....

I think it would be more intuitive if we checked the returned table using vim.tbl_isempty() and only inject the frontmatter if it has some content.

Alternatives

To not affect the defaults, if that is desirable, we could change the type of note_frontmatter_func to fun(note:obsidian.Note):table?.

The nil value would indicate that there is no frontmatter and that it should be removed from the current file.

Additional context

No response

[epwalsh]

@UtkarshVerma I agree this would make sense. If you want to make a PR, I believe you'd just have to modify Note:frontmatter_lines() to return an empty list when vim.tbl_isempty():

obsidian.nvim/lua/obsidian/note.lua

Line 582 in 1c2921e

Note.frontmatter_lines = function(self, eol, frontmatter)