From 361fbb69f1879341135a47ea34c37425a332d9ac Mon Sep 17 00:00:00 2001
From: Niels Simenon <niels.simenon@gmail.com>
Date: Wed, 18 Apr 2018 02:05:30 +0200
Subject: [PATCH] Added title limit setting and cleaned up README

---
 README.md      | 16 ++++++++++++----
 interpolate.js |  6 +++---
 2 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/README.md b/README.md
index 0c1bf88..7ec76b0 100644
--- a/README.md
+++ b/README.md
@@ -17,27 +17,35 @@ The default configuration aims to be sensible, and the application may be used w
 Path patterns dictate where and how a file will be saved. Various variables and options are available, and you may use subdirectories divided by `/`.
 
 ### Variables
+#### Post
 * `$postId`: The ID of the reddit post
 * `$postTitle`: The title of the reddit post
 * `$postUser`: The user that submitted the post, almost always equivalent to the `--user` command line argument
 * `$postDate`: The submission date of the reddit post, formatted by the `dateformat` configuration described below
 * `$postIndex`: The index of the post according to the sort method
+
+#### Album
 * `$albumId`: The ID of the media host album
 * `$albumTitle`: The title of the media host album
 * `$albumDescription`: The description of the media host album
 * `$albumDate`: The submission date of the media host album, formatted by the `dateformat` configuration described below
+
+#### Item (individual image, video or text)
 * `$itemId`: The ID of the individual image or video
 * `$itemTitle`: The title of the individual image or video
 * `$itemDescription`: The description of the individual image or video
 * `$itemDate`: The submission date of the individual image or video, formatted by the `dateformat` configuration described below
 * `$itemIndex`: The index of the individual image or video in an album, offset by the `indexOffset` configuration described below
-* `$ext`: The extension of the file. Must typically be included, but may be omitted for self (text) posts on Unix systems
+* `$ext`: The extension of the medium. Must typically be included, but may be omitted for self (text) posts on Unix systems
 
-### Date format
+### `dateFormat`
 Affects the representation of `$postDate`, `$albumDate` and `$itemDate` and defaults to `YYYYMMDD`. See [this documentation](https://date-fns.org/v1.29.0/docs/format) for an overview of all available tokens.
 
-### Index offset
+### `titleLimit`
+Titles can sometimes be longer than you prefer your filenames to be, or even overflow the operating system's limit (255 bytes for Linux). This property cuts off titles at a fixed number of characters.
+
+### `indexOffset`
 Arrays start at 0, but as to not tire myself out debating the matter, you may offset it my any numerical value you like. Affects the `$itemIndex` variable for album items.
 
-### Slash substitute
+### `slashSubstitute`
 The patterns represent Unix file paths, and a `/` therefore indicates a new directory. You may freely use directories in your paths, but titles or descriptions may contain a `/` that is not supposed to create a new directory. All instances of `/` in a variable value will be replaced with the configured slash substitute.
diff --git a/interpolate.js b/interpolate.js
index 415680d..6f759aa 100644
--- a/interpolate.js
+++ b/interpolate.js
@@ -15,7 +15,7 @@ function interpolate(path, post, item) {
 
     const vars = {
         $postId: post.id,
-        $postTitle: post.title,
+        $postTitle: (post.title || '').slice(0, config.patterns.titleLength),
         $postUser: post.user,
         $postDate: dateFns.format(post.datetime, dateFormat),
         $postIndex: post.index + config.patterns.indexOffset
@@ -24,7 +24,7 @@ function interpolate(path, post, item) {
     if(post.content.album) {
         Object.assign(vars, {
             $albumId: post.content.album.id,
-            $albumTitle: post.content.album.title,
+            $albumTitle: (post.content.album.title || '').slice(0, config.patterns.titleLength),
             $albumDescription: post.content.album.description,
             $albumDate: dateFns.format(post.content.album.datetime, dateFormat)
         });
@@ -33,7 +33,7 @@ function interpolate(path, post, item) {
     if(item) {
         Object.assign(vars, {
             $itemId: item.id,
-            $itemTitle: item.title,
+            $itemTitle: (item.title || '').slice(0, config.patterns.titleLength),
             $itemDescription: item.description,
             $itemDate: dateFns.format(item.datetime, dateFormat),
             $itemIndex: item.index + config.patterns.indexOffset,