Org-Mode - How do I create a new file with org-capture?

I want to create an org-capture template that create a dynamic file name for capture in emacs org-mode.

I want that the name of the file takes the following form: (format-time-string "%Y-%m-%d") "-" (prompt for a name) ".txt"

Example : 2012-08-10-MyNewFile.txt

Based on this answer, I know how to dynamically create the name the file to include the date:

`(defun capture-report-date-file (path)
(expand-file-name (concat path (format-time-string "%Y-%m-%d") ".txt")))

'(("t" "todo" entry (file (capture-report-date-file  "~/path/path/name"))
"* TODO")))

This allows me to create a file 2012-08-10.txt and to insert * TODO at the first line

How could I add a prompt to complete the file name?

Solution

You'll have to use (read-string ...) in capture-report-data-file to generate the filename on the fly.

(defun capture-report-date-file (path)
  (let ((name (read-string "Name: ")))
    (expand-file-name (format "%s-%s.txt"
                              (format-time-string "%Y-%m-%d")
                              name) path)))

'(("t"
   "todo"
   entry
   (file (capture-report-date-file  "~/path/path/name"))
   "* TODO")))

This will prompt on capture for the file name, and then open the capture buffer will be created.