refact: print_error and prompt_title

lua/telekasten/utils/files.lua

@@ -1,5 +1,6 @@
 local M = {}
 
+-- Checks if file exists
 function M.file_exists(fname)
     if fname == nil then
         return false
@@ -14,4 +15,28 @@ function M.file_exists(fname)
     end
 end
 
+-- Prompts the user for a note title
+function M.prompt_title(ext, defaultFile, callback)
+    local canceledStr = "__INPUT_CANCELLED__"
+
+    vim.ui.input({
+        prompt = "Title: ",
+        cancelreturn = canceledStr,
+        completion = "file",
+        default = defaultFile,
+    }, function(title)
+        if not title then
+            title = ""
+        end
+        if title == canceledStr then
+            vim.cmd("echohl WarningMsg")
+            vim.cmd("echomsg 'Note creation cancelled!'")
+            vim.cmd("echohl None")
+        else
+            title = strip_extension(title, ext)
+            callback(title)
+        end
+    end)
+end
+
 return M