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node_modules/@11ty/eleventy-fetch/src/Sources.js

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+class Sources {
+	static isFullUrl(url) {
+		try {
+			if(url instanceof URL) {
+				return true;
+			}
+
+			new URL(url);
+			return true;
+		} catch (e) {
+			// invalid url OR already a local path
+			return false;
+		}
+	}
+
+	static isValidSource(source) {
+		// String (url?)
+		if(typeof source === "string") {
+			return true;
+		}
+		if(this.isValidComplexSource(source)) {
+			return true;
+		}
+		return false;
+	}
+
+	static isValidComplexSource(source) {
+		// Async/sync Function
+		if(typeof source === "function") {
+			return true;
+		}
+		if(typeof source === "object") {
+			// Raw promise
+			if(typeof source.then === "function") {
+				return true;
+			}
+			// anything string-able
+			if(typeof source.toString === "function") {
+				return true;
+			}
+		}
+		return false;
+	}
+
+	static getInvalidSourceError(source, errorCause) {
+		return new Error("Invalid source: must be a string, function, or Promise. If a function or Promise, you must provide a `toString()` method or an `options.requestId` unique key. Received: " + source, { cause: errorCause });
+	}
+}
+
+module.exports = Sources;