From ad731ebc29c12b597fbb59739c2b3f45a03b4159 Mon Sep 17 00:00:00 2001
From: "Begerad, Stefan" <dialog@swingbe.de>
Date: Mon, 6 Jun 2022 13:54:29 +0200
Subject: [PATCH] feat(compare-files): initial commit

---
 compare-files/.gitignore        |  1 +
 compare-files/README.md         | 21 ++++++++++++++++++++
 compare-files/README.md.license |  5 +++++
 compare-files/files.js          | 34 +++++++++++++++++++++++++++++++++
 compare-files/index.js          | 16 ++++++++++++++++
 compare-files/package.json      | 21 ++++++++++++++++++++
 6 files changed, 98 insertions(+)
 create mode 100644 compare-files/.gitignore
 create mode 100644 compare-files/README.md
 create mode 100644 compare-files/README.md.license
 create mode 100644 compare-files/files.js
 create mode 100644 compare-files/index.js
 create mode 100644 compare-files/package.json

diff --git a/compare-files/.gitignore b/compare-files/.gitignore
new file mode 100644
index 0000000..81a38be
--- /dev/null
+++ b/compare-files/.gitignore
@@ -0,0 +1 @@
+.env*
diff --git a/compare-files/README.md b/compare-files/README.md
new file mode 100644
index 0000000..05edc4f
--- /dev/null
+++ b/compare-files/README.md
@@ -0,0 +1,21 @@
+## Overview
+Compare files
+
+## Preparation
+
+Run the following command in your favorite terminal to install dependenies.
+```
+npm i
+```
+
+## Development setup
+
+Run the following command in your favorite terminal if you fancy log messages for debugging.
+```
+export DEBUG=$DEBUG,debug
+```
+
+Run the following command in your favorite terminal to start the service in development mode.
+```
+npm run dev
+```
diff --git a/compare-files/README.md.license b/compare-files/README.md.license
new file mode 100644
index 0000000..2e76dc1
--- /dev/null
+++ b/compare-files/README.md.license
@@ -0,0 +1,5 @@
+/*
+ * SPDX-FileCopyrightText: 2022 Stefan Begerad <stefan@begerad.de>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
diff --git a/compare-files/files.js b/compare-files/files.js
new file mode 100644
index 0000000..8f00160
--- /dev/null
+++ b/compare-files/files.js
@@ -0,0 +1,34 @@
+const debug=require('debug')('files');
+const fs = require('fs');
+const fsp = fs.promises;
+
+//resolves to true or false
+async function compare(fname1, fname2) {
+    debug('fname1: '+fname1);
+    let h1, h2;
+    try {
+        h1 = await fsp.open(fname1);
+        h2 = await fsp.open(fname2);
+        const [stat1, stat2] = await Promise.all([h1.stat(), h2.stat()]);
+        if (stat1.size !== stat2.size) {
+	    debug('file size NOT equal');
+            return false;
+        }else{
+	    debug('file size equal');
+            return true;
+	}
+    } finally {
+        if (h1) {
+	    debug('h1 to be closed');
+            await h1.close();
+        }
+        if (h2) {
+	    debug('h2 to be closed');
+            await h2.close();
+        }
+    }
+}
+
+module.exports={
+    compare
+}
diff --git a/compare-files/index.js b/compare-files/index.js
new file mode 100644
index 0000000..cf592ab
--- /dev/null
+++ b/compare-files/index.js
@@ -0,0 +1,16 @@
+const debug=require('debug')('debug');
+const fs = require('fs');
+const files=require('./files');
+const path='/home/begerad/git/sib/sandbox-node/request';
+const filePathAbsOne=path+'/connect-top-dhid-1654510162870.zip';
+debug('filePathAbsOne: '+filePathAbsOne);
+const filePathAbsTwo=path+'/connect-top-dhid-1654514173016.zip';
+debug('filePathAbsTwo: '+filePathAbsTwo);
+
+//sample usage
+files.compare(filePathAbsOne,filePathAbsTwo).then(result => {
+    debug('result: '+result);
+}).catch(err => {
+    console.log(err);
+});
+debug('done.');
diff --git a/compare-files/package.json b/compare-files/package.json
new file mode 100644
index 0000000..371ef88
--- /dev/null
+++ b/compare-files/package.json
@@ -0,0 +1,21 @@
+{
+    "private": true,
+    "name": "compare-files",
+    "version": "0.0.1",
+    "description": "",
+    "main": "index.js",
+    "scripts": {
+        "dev": "nodemon index.js",
+        "test": "echo \"Error: no test specified\" && exit 1"
+    },
+    "author": "Stefan Begerad",
+    "license": "GPL-3.0",
+    "devDependencies": {
+        "nodemon": "^2.0.7"
+    },
+    "dependencies": {
+        "fs": "0.0.1-security",
+        "http": "0.0.1-security",
+        "request": "^2.88.2"
+    }
+}