Incorporate fast resume into project

bin/cmd.js

@@ -0,0 +1 @@
+"use strict";

fastResume.js

@@ -0,0 +1,55 @@
+"use strict";
+
+const fs = require("fs");
+const b = require("bencode");
+const path = require("path");
+
+const add_fast_resume = (meta, basepath) => {
+	let files = [];
+	let fpath = path.join(basepath, meta.info.name.toString("utf8"));
+	if ("files" in meta.info) {
+		for (let file of meta.info.files) {
+			let ffpath = fpath;
+			for (let dir of file.path) {
+				ffpath = path.join(ffpath, dir.toString("utf8"));
+			}
+			let obj = { path: ffpath, size: file.length };
+			files.push(obj);
+		}
+	} else {
+		let obj = {};
+		obj.path = fpath;
+		obj.size = meta.info.length;
+		files.push(obj);
+	}
+
+	let resume = {};
+	resume.bitfield = Math.floor(meta.info.pieces.length / 20);
+	resume.files = [];
+	let piece_length = meta.info["piece length"];
+	let offset = 0;
+
+	for (let file of files) {
+		try {
+			let states = fs.statSync(file.path);
+			if (states.size != file.size) {
+				throw new Error("Files not matching!");
+			}
+			let obj = {};
+			obj.priority = 1;
+			obj.mtime = Math.floor(states.mtimeMs / 1000);
+			obj.completed =
+				Math.floor(
+					(offset + file.size + piece_length - 1) / piece_length
+				) - Math.floor(offset / piece_length);
+			resume.files.push(obj);
+			offset += file.size;
+		} catch (err) {
+			throw new Error("Files not matching!");
+		}
+	}
+	meta.libtorrent_resume = resume;
+	return meta;
+};
+
+module.exports = add_fast_resume;

index.js

@@ -1,5 +1,5 @@
 #!/usr/bin/env node
-
+"use strict";
 const parseTorrent = require("parse-torrent");
 const fs = require("fs");
 const path = require("path");

package.json

@@ -10,6 +10,7 @@
 	"license": "ISC",
 	"dependencies": {
 		"axios": "^0.19.2",
+		"bencode": "^2.0.1",
 		"chalk": "^4.1.0",
 		"minimist": "^1.2.5",
 		"parse-torrent": "^7.1.3"

yarn.lock

@@ -22,7 +22,7 @@ axios@^0.19.2:
   dependencies:
     follow-redirects "1.5.10"
 
-bencode@^2.0.0:
+bencode@^2.0.0, bencode@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/bencode/-/bencode-2.0.1.tgz#667a6a31c5e038d558608333da6b7c94e836c85b"
   integrity sha512-2uhEl8FdjSBUyb69qDTgOEeeqDTa+n3yMQzLW0cOzNf1Ow5bwcg3idf+qsWisIKRH8Bk8oC7UXL8irRcPA8ZEQ==