add #tag in Note automatically to frontmatter tags

[eist76]

🚀 The feature, motivation and pitch

similar to the functionality to add the title to the frontmatter alias (see below), i would like to automatically add all '#tag' tags in the note itself to the frontmatter tags automatically:

note_frontmatter_func = function(note)
    -- Add the title of the note as an alias.
    if note.title then
      note:add_alias(note.title)
    end

I was able to make this functionality work by adding the following to my obsidian.lua file for my lazy config - this is probably not very beautiful but shows the intention i guess:

-- Function to extract tags from the text
local function extract_tags(text)
	local tags = {}
	for tag in text:gmatch("#([%w-]+)") do
		table.insert(tags, tag)
	end
	return tags
end

-- Function to add tags to frontmatter
local function add_tags_to_frontmatter(note)
	local bufnr = vim.api.nvim_get_current_buf()
	local lines = vim.api.nvim_buf_get_lines(bufnr, 0, -1, false)
	local tags = extract_tags(table.concat(lines, "\n"))

	-- Add the title of the note as an alias.
	if note.title then
		note:add_alias(note.title)
	end

	-- Merge existing tags with new tags, ensuring existing tags are prioritized
	local all_tags = note.tags or {}
	local unique_tags = {}
	local final_tags = {}

	-- Add existing frontmatter tags first
	for _, tag in ipairs(all_tags) do
		table.insert(final_tags, tag)
		unique_tags[tag] = true
	end

	-- Add new tags from the text, ensuring no duplicates
	for _, tag in ipairs(tags) do
		if not unique_tags[tag] then
			table.insert(final_tags, tag)
			unique_tags[tag] = true
		end
	end

	local out = { id = note.id, aliases = note.aliases, tags = final_tags }

	-- `note.metadata` contains any manually added fields in the frontmatter.
	-- So here we just make sure those fields are kept in the frontmatter.
	if note.metadata ~= nil and not vim.tbl_isempty(note.metadata) then
		for k, v in pairs(note.metadata) do
			out[k] = v
		end
	end

	return out
end

and then changed the following line in the opts block:
note_frontmatter_func = function(note)
to
note_frontmatter_func = add_tags_to_frontmatter,

i was wondering if this functionality could be added to the plugin and then just be enabled through a configuration setting.

Alternatives

No response

Additional context

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