I wish to place text after a ## tag in an obsidian file

[sylumer]

I think this action should do what you want.

Drafts Directory: michaelw - Obsidian Journal Update

Set Up

In order for the action to work, it has to know the location of the obsidian vault you want to use.

You need to have a Drafts Bookmark set up that points to the root of your Obsidian vault. in the script, the name of the bookmark is specified as “obsidian_drafts”. You can name your bookmark the same, but if you name it something different, you MUST change the OBSIDIAN_FOLDER_BOOKMARK constant to match the name that you wish to use.

Features

• Works directly with the Markdown file, so is not opening Obsidian and relying on URL schema to drive the changes.
• Automatically trims whitespace from content.
• Will add multiple lines of content as multiple timestamped entries.
• Basic options are available as constants in the insertintoDailyNote() function.
• The default action does no processing of the draft after completion, but you could modify the standard action options to archive or trash a draft once processed if required.

Action Steps

The action consists of a single script step.

function insertIntoDailyNote(p_strJournalAddition)
{
	// Settings
	const ENTRY_SPACER = " ";
	const OBSIDIAN_FOLDER_BOOKMARK = "obsidian_drafts";
	const JOURNALPATH = "/Daily/";
	const REGEX_SECTIONS = /(.*)(## Journal\n)(.*)(\n\n\n)(.*)/gs;

	// Set up file access and get file content
	let bmObisidian = Bookmark.findOrCreate(OBSIDIAN_FOLDER_BOOKMARK);
	let fmObsidian = FileManager.createForBookmark(bmObisidian);
	let strDailyNotePath = JOURNALPATH + draft.processTemplate("[[date]]") + ".md";
	let strDailyNoteContent = fmObsidian.readString(strDailyNotePath);

	// If the daily note does not exist, log it and bail out
	if (strDailyNoteContent === undefined)
	{
		console.log(strDailyNotePath + " not found");
		return false;
	}

	// Build new content and add it to the daily note
	// - Input is processed per line and whitespace is trimmed
	// - Inserting is before the two blank lines first found after the H2 Journal heading (Markdown)
	// - Boolean success of the file updating is returned.
	let strContentToInsert =  p_strJournalAddition.split('\n').map(s => draft.processTemplate("\n[[date|%R]]") + ENTRY_SPACER + s.trim()).join("");;
	strDailyNoteContent = strDailyNoteContent.replace(REGEX_SECTIONS, "$1$2$3" + strContentToInsert + "$4$5");
	return fmObsidian.writeString(strDailyNotePath, strDailyNoteContent);
}

// Add current draft to dail note in Obsidian as journal entries
if (insertIntoDailyNote(draft.content)) app.displaySuccessMessage("Daily Note Updated");
else app.displayErrorMessage("Failed to Update Daily Note");

Testing

I have successfully tested it with a draft that meets the criteria you have specified. This has included processing both single line draft content and multi-line draft content.

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Hopefully, that covers everything.