added support of maff metadata import (url and date)

lib/single-file/single-file-core.js

@@ -336,6 +336,11 @@ this.SingleFileCore = this.SingleFileCore || (() => {
 		}
 
 		initialize() {
+			this.options.saveDate = new Date();
+			this.options.saveUrl = this.options.url;
+			if (this.options.enableMaff) {
+				this.maffMetaDataPromise = this.batchRequest.addURL(docUtil.resolveURL("index.rdf", this.options.baseURI || this.options.url), false);
+			}
 			this.maxResources = this.batchRequest.getMaxResources();
 			if (!this.options.saveRawPage && !this.options.removeFrames && this.options.framesData) {
 				this.options.framesData.forEach(frameData => this.maxResources += frameData.maxResources || 0);
@@ -377,6 +382,27 @@ this.SingleFileCore = this.SingleFileCore || (() => {
 			if (this.doc.head.querySelectorAll("*").length == 1 && metaCharset && this.doc.body.childNodes.length == 0) {
 				this.doc.head.querySelector("meta[charset]").remove();
 			}
+			if (this.maffMetaDataPromise) {
+				const maffMetaData = await this.maffMetaDataPromise;
+				if (maffMetaData && maffMetaData.content) {
+					const NAMESPACE_RDF = "http://www.w3.org/1999/02/22-rdf-syntax-ns#";
+					const maffDoc = docUtil.parseXMLContent(maffMetaData.content);
+					const originalURLElement = maffDoc.querySelector("RDF > Description > originalurl");
+					const archiveTimeElement = maffDoc.querySelector("RDF > Description > archivetime");
+					if (originalURLElement) {
+						this.options.saveUrl = originalURLElement.getAttributeNS(NAMESPACE_RDF, "resource");
+					}
+					if (archiveTimeElement) {
+						const value = archiveTimeElement.getAttributeNS(NAMESPACE_RDF, "resource");
+						if (value) {
+							const date = new Date(value);
+							if (!isNaN(date.getTime())) {
+								this.options.saveDate = new Date(value);
+							}
+						}
+					}
+				}
+			}
 			const titleElement = this.doc.querySelector("title");
 			const descriptionElement = this.doc.querySelector("meta[name=description]");
 			const authorElement = this.doc.querySelector("meta[name=author]");
@@ -399,8 +425,8 @@ this.SingleFileCore = this.SingleFileCore || (() => {
 			if (this.options.insertSingleFileComment) {
 				const infobarContent = (this.options.infobarContent || "").replace(/\\n/g, "\n").replace(/\\t/g, "\t");
 				const commentNode = this.doc.createComment("\n Page saved with SingleFile" +
-					" \n url: " + this.options.url +
-					" \n saved date: " + new Date() +
+					" \n url: " + this.options.saveUrl +
+					" \n saved date: " + this.options.saveDate +
 					(infobarContent ? " \n info: " + infobarContent : "") + "\n");
 				this.doc.documentElement.insertBefore(commentNode, this.doc.documentElement.firstChild);
 			}
@@ -1050,8 +1076,8 @@ this.SingleFileCore = this.SingleFileCore || (() => {
 
 	class ProcessorHelper {
 		static async evalTemplate(template = "", options, content, dontReplaceSlash) {
-			const date = new Date();
-			const url = docUtil.parseURL(options.url);
+			const date = options.saveDate;
+			const url = docUtil.parseURL(options.saveUrl);
 			template = await Util.evalTemplateVariable(template, "page-title", () => options.title || "No title", dontReplaceSlash);
 			template = await Util.evalTemplateVariable(template, "page-language", () => options.info.lang || "No language", dontReplaceSlash);
 			template = await Util.evalTemplateVariable(template, "page-description", () => options.info.description || "No description", dontReplaceSlash);