feat(neovim): Implement markdown paste function using lua

neovim/init.lua

@@ -19,6 +19,7 @@ require("lazy").setup("plugins")
 vim.cmd([[colorscheme tokyonight]])
 
 require("core/settings")
+require("core/functions")
 require("core/autocommands")
 require("core/lsp")
 require("core/keymaps")

neovim/lua/core/functions.lua

@@ -1,21 +1,48 @@
--- TODO: convert this to lua
 -- http://lua-users.org/wiki/GettingTheTitleFromHtmlFiles
-
 -- https://benjamincongdon.me/blog/2020/06/27/Vim-Tip-Paste-Markdown-Link-with-Automatic-Title-Fetching/
 -- https://vim.fandom.com/wiki/Make_an_HTML_anchor_and_href_tag
 -- https://stackoverflow.com/questions/1115447/how-can-i-get-the-word-under-the-cursor-and-the-text-of-the-current-line-in-vim
+
+local function is_url(text)
+  local url_pattern = "^https?://[%w-_%.%?%.:/%+=&]+$"
+  return string.match(text, url_pattern) ~= nil
+end
+
 local function get_url_title(url)
-  local html = os.execute("curl -s " .. url)
-  local regex = ".*head.*<title[^>]*>%s*([^%s]*)%s*</title>"
-  local title = string.gsub(string.match(html, regex), "\n", " ")
+  local handle = io.popen("curl -s " .. url)
+  if not handle then
+    return "Error fetching URL"
+  end
+
+  local html = handle:read("*a")
+  handle:close()
+
+  if not html then
+    return "Error reading HTML"
+  end
+
+  local title = html:match("<title>(.-)</title>")
+  if title then
+    title = title:gsub("\n", " "):gsub("%s+", " ")
+  else
+    title = "No Title Found"
+  end
   return title
 end
 
 local function paste_md_link()
   local url = vim.fn.getreg('+')
+
+  if not is_url(url) then
+    print("Clipboard content is not a valid URL")
+    return
+  end
+
   local title = get_url_title(url)
-  vim.fn.put("[", title, "](", url, ")")
+  local markdown_link = string.format("[%s](%s)", title, url)
+
+  vim.api.nvim_put({ markdown_link }, 'l', true, true)
 end
 
 -- Make a keybinding (mnemonic: "mark down paste")
-vim.keymap.set('n', '<Leader>mdp', paste_md_link(), {noremap = true})
+vim.keymap.set('n', '<Leader>mdp', paste_md_link, { noremap = true, silent = true })