Function resolveActiveNoteFieldDefault

src/utils/activeNoteFieldDefault.ts:59–71

(
	app: App,
	activeFile: TFile | null | undefined,
	fieldName: string,
)

 * {@link resolveFieldDefaultFromFrontmatter}). Read-only: it never mutates a file.
 */
export function resolveActiveNoteFieldDefault(
	app: App,
	activeFile: TFile | null | undefined,
	fieldName: string,
): string | string[] | null {
	// Only Markdown notes carry frontmatter properties; a non-md active file (or
	// no active file) means "no active-derived default", matching the issue's
	// "fall back to normal {{FIELD:project}} behavior" rule.
	if (!activeFile || activeFile.extension !== "md") return null;

	const frontmatter = app.metadataCache.getFileCache(activeFile)?.frontmatter;
	return resolveFieldDefaultFromFrontmatter(frontmatter, fieldName);
}

/**
 * Converts a single frontmatter value into a default string when it is a usable