A configurable search and feed bot for the website e926.net.

In order to have the bot post to a channel, a feed must be created using `!feed set` and an optional mentioned channel.
Any extra text afterwards is used to set a filter, based on the default search terms, except slightly modified

 - `!feed set (wolf feral) | dragon` would post every new image that is both tagged `wolf` and `feral` or has the `dragon` tag.
 - `!feed set *_legs` would post every new image that has a tag that ends with `_legs`.

You can also set server wide filters as well, which are applied in addition to channel filters

 - `!feed server set -human` would filter out every image in all channels that contains the `human` tag.

When a new image is uploaded to e926, it will be posted to the channel if it passes the filter on the channel.
If a channel is marked SFW, an automatic filter will be added, excluding any mature content.
Filter grammar:
 - `rating: [s|q|e]`
 - `user: <the uploader's username>`
 - `type: <a filetype (jpg, png, gif)>`
 - `<tag>`

Complex tags:
  Tags which contain any of the characters `-|:()` must either have these values escaped with \\ or quotes.
  The correct way of filtering for `pokémon_(species)` is one of:
   - "pokémon_(species)"
   - 'pokémon_(species)'
   - pokémon_\\(species\\)

You can also set server wide filters as well, which are applied in addition to channel filters
 - `!feed server set -human` would filter out every image in all channels that contains the `human` tag.


Filters can be combined together using AND (` `), OR (`|`), NOT (`-`) and BRACKETS (`()`), in reverse priority order.

Feeds can be created in DMs using this group of commands.

Searching:

Search with `!search <filter>`. Results are posted 3 at a time and can be posted individually by reacting with the corresponding digit.
To scroll, use the left and right arrow reactions as appropriate.

Ordering searches:

Searches can be sorted with the `order` keyword. Valid ways to order searches are as follows:
 - score
 - score_asc
 - id
 - id_asc
 - fav_count
 - fav_count_asc
 - file_size
 - file_size_asc
 - random
 
You may use multiple `order` keywords. `order: score order: fav_count` will sort the results firstly by score and then fav_count, resulting in the highest scored image first and when a tie for score occurs, sort by fav_count instead.
`_asc` sorts in reverse, which may have unintended consequences, especially when used with `score`.

Hearts:
When reposted, the bot will react with a blue heart. 
React also to have the bot DM you the image posted. 
This works on any individually posted message, including feeds.

Rate limiting: 
Searching is an expensive operation to perform.
Thus it is limited to 5 pages unless you vote for the bot on DBL, this gives you unlimited pages to view for 24 hours and supports the bot.


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