refactor: update frontmatter block removal function

Author: decaf-dev

src/main.ts

@@ -1,5 +1,5 @@
 import { MarkdownView, Notice, Plugin, TFile, normalizePath } from "obsidian";
-import { escapeInvalidFileNameChars, findFrontmatterEndIndex, trimForFileName } from "./utils";
+import { escapeInvalidFileNameChars, removeFrontmatterBlock, trimForFileName } from "./utils";
 import NoteSplitterSettingsTab from "./obsidian/note-splitter-settings-tab";
 
 interface NoteSplitterSettings {
@@ -61,14 +61,9 @@ export default class NoteSplitterPlugin extends Plugin {
 			return;
 		}
 
-		const fileData = await this.app.vault.cachedRead(file);
-		const frontmatterEndIndex = findFrontmatterEndIndex(fileData);
+		const data = await this.app.vault.cachedRead(file);
 
-		let dataWithoutFrontmatter = fileData;
-		//Ignore frontmatter
-		if (frontmatterEndIndex !== -1) {
-			dataWithoutFrontmatter = dataWithoutFrontmatter.slice(frontmatterEndIndex + 1);
-		}
+		const dataWithoutFrontmatter = removeFrontmatterBlock(data);
 		if (dataWithoutFrontmatter === "") {
 			new Notice("No content to split.");
 			return;

src/utils.ts

@@ -1,17 +1,7 @@
-export const findFrontmatterEndIndex = (value: string) => {
+export const removeFrontmatterBlock = (data: string) => {
 	// Define the regular expression for the frontmatter block
-	const regex = /^---\n([\s\S]*?)\n---/;
-
-	// Execute the regex on the string
-	const match = regex.exec(value);
-
-	// If a match is found, return the index where the block ends
-	if (match) {
-		// The ending index is the starting index of the match plus its length
-		return match[0].length;
-	}
-	// If no match is found, return -1
-	return -1;
+	const FRONTMATTER_REGEX = /^---\n([\s\S]*?)\n---/;
+	return data.replace(FRONTMATTER_REGEX, "").trim();
 };
 
 /**