Function extractNoteInfo

src/utils/helpers.ts:514–601

(
	app: App,
	content: string,
	path: string,
	file?: TFile,
	fieldMapper?: FieldMapper
)

 * Extracts note information from a note file's content
 */
export function extractNoteInfo(
	app: App,
	content: string,
	path: string,
	file?: TFile,
	fieldMapper?: FieldMapper
): {
	title: string;
	tags: string[];
	path: string;
	createdDate?: string;
	lastModified?: number;
} | null {
	let title = path.split("/").pop()?.replace(".md", "") || "Untitled";
	let tags: string[] = [];
	let createdDate: string | undefined = undefined;
	let lastModified: number | undefined = file?.stat.mtime;

	// Try to extract note info from frontmatter using native metadata cache
	if (file) {
		const metadata = app.metadataCache.getFileCache(file);
		const frontmatter = metadata?.frontmatter;

		if (frontmatter) {
			if (frontmatter.title) {
				title = frontmatter.title;
			}

			if (frontmatter.tags && Array.isArray(frontmatter.tags)) {
				tags = frontmatter.tags;
			}

			// Extract creation date using field mapper if available
			if (fieldMapper) {
				const dateCreatedField = fieldMapper.toUserField("dateCreated");
				if (frontmatter[dateCreatedField]) {
					createdDate = frontmatter[dateCreatedField];
				}
			} else {
				// Fallback to common field names when no field mapper provided
				if (frontmatter.dateCreated) {
					createdDate = frontmatter.dateCreated;
				} else if (frontmatter.created) {
					createdDate = frontmatter.created;
				}
			}
		}
	}

	// Look for first heading in the content as a fallback title
	if (title === "Untitled") {
		const headingMatch = content.match(/^#\s+(.+)$/m);
		if (headingMatch && headingMatch[1]) {
			title = headingMatch[1].trim();
		}
	}

	// If no creation date in frontmatter, use file creation time