Set node in org-node-capture-target with proposed title

When capturing via org-protocol, we first set te proposed title and id. In this case, check if there is an existing node, otherwise this function errors trying to open the file or buffer as one or both already exist. This stops the org-protocol capture from silently "doing nothing", and allows you to add notes to an existing captured node if desired. This allows me to use it with a workflow based on `org-roam` (without desiring to use `fake-roam`) ```elisp (defun my-org-node-protocol-open-ref (info) "Process an org-protocol://roam-ref?ref= style url with INFO. It opens or creates a note with the given ref. javascript:location.href = \\='org-protocol://roam-ref?template=r&ref=\\='+ \\ encodeURIComponent(location.href) + \\='&title=\\=' + \\ encodeURIComponent(document.title) + \\='&body=\\=' + \\ encodeURIComponent(window.getSelection())" (unless (plist-get info :ref) (user-error "No ref key provided")) (let ((ref (plist-get info :ref)) (title (plist-get info :title)) (body (plist-get info :body))) (setq my-org-node-ref-capture-ref ref) (setq my-org-node-ref-capture-title title) (setq my-org-node-ref-capture-body body) (setq org-node-ask-directory (file-truename "~/Sync/org/roam/references")) ) (unwind-protect (org-capture nil "r") (setq my-org-node-ref-capture-ref nil) (setq my-org-node-ref-capture-title nil) (setq my-org-node-ref-capture-body nil)) (setq org-node-ask-directory (file-truename "~/Sync/org/roam"))) (push '("org-roam-ref" :protocol "roam-ref" :function my-org-node-protocol-open-ref :kill-client t ;; If I use C-g to abort, do not wait in protocol handler ) org-protocol-protocol-alist) ``` The "r" capture template is set to call ```elisp (defun my-org-node-capture-target () (when my-org-node-ref-capture-title (setq org-node-proposed-title my-org-node-ref-capture-title) ;; must set ID too, there is an expectation of it in org-node (setq org-node-proposed-id (org-id-new))) (unwind-protect (org-node-capture-target) (setq org-node-proposed-title nil) (setq org-node-proposed-id nil))) ```