slash command for Adding markdown text to reference

[hanipcode]

share_markdown.mp4

I was finding a way to insert notion documents into the chat context. but as I realize maybe the more simpler way to do it was to be able to share markdown text as a chat context. this way I can enter other docs as well to chat reference. well it a bit annoying to manually copy paste but I find it not that much of annoyance for me for now, here is how I do it

I realize I could also just paste into the codecompanion buffer directly, but sometime the PRD I work with contain few pages and I don't want to pollute the chat buffer. I also think a few way to extend this like ability to update the reference, but will work on it later

utils to open a markdown buffer

--- @alias TextareaCallback fun(first_line: string?, full_text: string?): nil

---@param callback TextareaCallback
function M.open_textarea(callback)
	local buf = vim.api.nvim_create_buf(false, true)
	vim.bo[buf].filetype = "markdown"
	local width = 100
	local height = 30
	local win_opts = {
		relative = "editor",
		width = width,
		height = height,
		row = (vim.o.lines - height) / 2,
		col = (vim.o.columns - width) / 2,
		style = "minimal",
		border = "rounded",
	}

	local win = vim.api.nvim_open_win(buf, true, win_opts)

	vim.api.nvim_buf_set_keymap(buf, "n", "<CR>", "", {
		callback = function()
			local lines = vim.api.nvim_buf_get_lines(buf, 0, -1, false)
			vim.api.nvim_win_close(win, true)
			callback(lines[1], table.concat(lines, "\n"))
		end,
		noremap = true,
		silent = true,
	})

	-- Optional: Esc to cancel
	vim.api.nvim_buf_set_keymap(buf, "n", "<Esc>", "", {
		callback = function()
			vim.api.nvim_win_close(win, true)
			vim.notify("Adding reference canceled")
		end,
		noremap = true,
		silent = true,
	})
end

then the slash command function

function M.slash_md_reference(chat)
	local constants = require("codecompanion.config").config.constants
	---@type TextareaCallback
	local callback = function(first_line, full_text)
		local id = "<markdown>" .. first_line .. "</markdown>"
		local prompt = [[

			The user is sharing a markdown text with you, it can be a PRD, a description of a task, or even an openapi contract. 
      if it is description of a task or a product you should follow the description there and remind the user if some implementation is not adheere to the shared document.
      if it is openapi contract you should remember it and when implementing a form of rest api call use that as reference
      Here is the content of the file
    ]]
		local content = fmt(
			[[%s:

```%s
%s
```]],
			"markdown",
			prompt,
			full_text
		)
		chat:add_message({
			role = constants.USER_ROLE,
			content = content,
		}, { reference = id, visible = false })

		chat.references:add({
			id = id,
			source = "codecompanion.strategies.chat.slash_commands.file",
		})
	end

	local fun = require("hanipcode.local.fun")
	fun.open_textarea(callback)
end