create timestamps of every new line when journalling (for tracking the development of symptoms over time for example, or a low friction timestamped journal)

line_timestamp_journal.lua

-- plugin/finished_line_logger.lua
local journal_file = os.getenv("HOME") .. "/nvim-journal.txt"

local function append_to_journal(line, timestamp)
    local file = io.open(journal_file, "a")
    if file then
        file:write(string.format("%s|%s\n", line, timestamp))
        file:close()
    else
        print("Error: Could not open journal file")
    end
end

local last_line = ""
local last_line_num = 0

vim.api.nvim_create_autocmd({"CursorMovedI"}, {
    pattern = {"*.tmd"},
    callback = function()
        local current_line = vim.api.nvim_get_current_line()
        local cursor = vim.api.nvim_win_get_cursor(0)
        local current_line_num = cursor[1]

        if current_line_num ~= last_line_num and last_line ~= "" then
            local timestamp = os.date("%Y-%m-%d %H:%M:%S")
            append_to_journal(last_line, timestamp)
            last_line = ""
        end

        last_line = current_line
        last_line_num = current_line_num
    end,
})