From b6354128c0307b9b0329ac22032ee20af532d4da Mon Sep 17 00:00:00 2001
From: Mayuran Visakan <mayuran.k.v@gmail.com>
Date: Wed, 30 Aug 2023 22:14:18 +0100
Subject: [PATCH] Readd files

---
 src/External/ExecuteCode/CodeBlockArgs.ts | 54 +++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 src/External/ExecuteCode/CodeBlockArgs.ts

diff --git a/src/External/ExecuteCode/CodeBlockArgs.ts b/src/External/ExecuteCode/CodeBlockArgs.ts
new file mode 100644
index 0000000..f3bb50f
--- /dev/null
+++ b/src/External/ExecuteCode/CodeBlockArgs.ts
@@ -0,0 +1,54 @@
+import {Notice} from "obsidian";
+import * as JSON5 from "json5";
+
+export type ExportType = "pre" | "post";
+
+/**
+ * Arguments for code blocks, specified next to the language identifier as JSON
+ * @example ```python {"export": "pre"}
+ * @example ```cpp {"ignoreExport": ["post"]}
+ */
+export interface CodeBlockArgs {
+	label?: string;
+	import?: string | string[];
+	export?: ExportType | ExportType[];
+	ignore?: (ExportType | "global")[] | ExportType | "global" | "all";
+}
+
+/**
+ * Get code block args given the first line of the code block.
+ *
+ * @param firstLineOfCode The first line of a code block that contains the language name.
+ * @returns The arguments from the first line of the code block.
+ */
+export function getArgs(firstLineOfCode: string): CodeBlockArgs {
+	// No args specified
+	if (!firstLineOfCode.contains("{") && !firstLineOfCode.contains("}"))
+		return {};
+	try {
+		let args = firstLineOfCode.substring(firstLineOfCode.indexOf("{") + 1).trim();
+		// Transform custom syntax to JSON5
+		args = args.replace(/=/g, ":");
+		// Handle unnamed export arg - pre / post at the beginning of the args without any arg name
+		const exports: ExportType[] = [];
+		const handleUnnamedExport = (exportName: ExportType) => {
+			let i = args.indexOf(exportName);
+			while (i !== -1) {
+				const nextChar = args[i + exportName.length];
+				if (nextChar !== "\"" && nextChar !== "'") {
+					// Remove from args string
+					args = args.substring(0, i) + args.substring(i + exportName.length + (nextChar === "}" ? 0 : 1));
+					exports.push(exportName);
+				}
+				i = args.indexOf(exportName, i + 1);
+			}
+		};
+		handleUnnamedExport("pre");
+		handleUnnamedExport("post");
+		args = `{export: ['${exports.join("', '")}'], ${args}`;
+		return JSON5.parse(args);
+	} catch (err) {
+		new Notice(`Failed to parse code block arguments from line:\n${firstLineOfCode}\n\nFailed with error:\n${err}`);
+		return {};
+	}
+}