Hi Robert,

Not sure what you want to do after opening but I have some code that
extracts a time range out of a date tree.  Maybe you can reuse the
searching parts ...


(defun mp26/org-find-headline-prefix-in-buffer (heading &optional buffer 
  "Find node with heading-prefix HEADING in BUFFER.
Return a marker to the heading if it was found, or nil if not.
If POS-ONLY is set, return just the position instead of a marker.

The heading prefix must match as prefix of the full headline.  It
may have a TODO keyword, a priority cookie and tags in the
standard locations."
  (with-current-buffer (or buffer (current-buffer))
        (goto-char (point-min))
        (let (case-fold-search)
          (if (re-search-forward
               (format org-complex-heading-regexp-format
                       (concat (regexp-quote heading) ".*")) nil t)
              (if pos-only
                  (match-beginning 0)
                (move-marker (make-marker) (match-beginning 0)))))))))

(defun mp26/org-week-from-journal ()
  "Insert a copy of the current week from the journal."
    (with-current-buffer "Journal.org<Daten>"
      (loop for days in '(-6 -5 -4 -3 -2 -1 0)
            (let* ((date (calendar-current-date days))
                    (format "%d-%02d-%02d"
                            (nth 2 date) (nth 0 date) (nth 1 date))))
              (setq pos (mp26/org-find-headline-prefix-in-buffer
                         date-string nil t))
              (when pos
                (goto-char pos)
                (car kill-ring)))))

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