From 783e2d8765bc6d2860ec02adaecd67efa4a6ac4e Mon Sep 17 00:00:00 2001
From: Niels Simenon <niels.simenon@gmail.com>
Date: Sat, 7 Jul 2018 00:58:15 +0200
Subject: [PATCH] Added byte truncate script to repo. Fixed yargs not enforcing
 choices.

---
 src/cli.js                  |  4 ++--
 src/utils/truncate-bytes.js | 23 +++++++++++++++++++++++
 2 files changed, 25 insertions(+), 2 deletions(-)
 create mode 100644 src/utils/truncate-bytes.js

diff --git a/src/cli.js b/src/cli.js
index fcf66e1..3acbd05 100644
--- a/src/cli.js
+++ b/src/cli.js
@@ -59,11 +59,11 @@ function getArgs() {
         })
         .option('after-indexed', {
             describe: 'Only include posts after the oldest or the latest entry in the index',
-            options: ['oldest', 'latest'],
+            choices: ['oldest', 'latest'],
         })
         .option('before-indexed', {
             describe: 'Only include posts before the oldest or the latest entry in the index',
-            options: ['oldest', 'latest'],
+            choices: ['oldest', 'latest'],
         })
         .option('redownload', {
             describe: 'Ignore index file and force a redownload of everything in the selection. Does not affect [before|after]-indexed',
diff --git a/src/utils/truncate-bytes.js b/src/utils/truncate-bytes.js
new file mode 100644
index 0000000..d7c9927
--- /dev/null
+++ b/src/utils/truncate-bytes.js
@@ -0,0 +1,23 @@
+'use strict';
+
+function truncateBytes(str, limit) {
+    if (Buffer.from(str).length <= limit) {
+        return str;
+    }
+
+    let acc = '';
+
+    for (let i = 0; i < str.length; i++) {
+        const newString = acc + str.charAt(i);
+
+        if (Buffer.from(newString).length > limit) {
+            break;
+        }
+
+        acc = newString;
+    }
+
+    return acc;
+}
+
+module.exports = truncateBytes;