Added README.

README.md

@@ -0,0 +1,40 @@
+# reddit-post-dump
+
+## Installation
+`npm install`
+
+## Usage
+`node app.js --user={username}`
+
+## Configuration
+The default configuration aims to be sensible, and the application may be used without any further tweaking. However, this application came to life because I was not satisfied by the organizatory facilities of similar applications, thus a multitude of options are at your disposal as described in this document.
+
+### Patterns
+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
+* `$postId`: The ID of the reddit post
+* `$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
+
+* `$albumId`: The ID of the media host album
+* `$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
+
+* `$itemId`: The ID of the individual image or video
+* `$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 practically always be included.
+
+### Date format
+Affects the representation of `$postDate`, `$albumDate` and `$itemDate` and defaults to `YYYYMMDD`. See [this documentation](https://date-fns.org/v1.29.0/docs/format) for an overview of all available tokens.
+
+### Index offset
+Arrays start at 0, but as to not tire myself out debating the matter, you may offset it my any numerical value you like. Affects the `$itemIndex` variable for album items.
+
+### Slash substitute
+The patterns are 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.

fetchContent.js

@@ -14,7 +14,7 @@ const extensions = {
 };
 
 function interpolate(path, post, item, index) {
-    const dateFormat = config.patterns.date || 'YYYYMMDD';
+    const dateFormat = config.patterns.dateformat || 'YYYYMMDD';
 
     const vars = {
         $postId: post.id,