slack2 0.27.0

slack realtime messaging client: https://api.slack.com/bot-users
Documentation 
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# Changelog

## 0.25.0

- Add `Goodbye` event which indicates that Slack is shutting down the socket and the client should reconnect
- Add `with_native_tls` and `with_rustls` features. At least one must be selected, default is `with_native_tls`
- Update example to post a message in response to the `Hello` event which indicates the socket is ready

## 0.24.0

- Update to `slack_api v0.23.0`

## 0.23.0

- Update to `slack_api v0.22.0`
  - Reqwest 0.10.0 (blocking)
  - Tungstenite 0.9.2
  - url 2.1.0
- 2018 edition source

## 0.22.0

- Update to `slack_api v0.21.0`
  - Reqwest 0.9.0
  - Tungstenite 0.6.0

## 0.21.0

- Update to `slack_api v0.20.0`
  - channel.priority is a number
  - Reqwest 0.8.5

## 0.20.0

- Update to `slack_api v0.19.0`
  - Adds some user/user_profile and channel info

## 0.19.0


- Update to `slack_api v0.18.0`
  - Adds message threading fields to api types
- Update serde to `1.0.0` **breaking change, your serde must be ~1.0.0**

## 0.18.0


Update to `slack_api v0.17.0`

## 0.17.1


Update to `slack_api v0.16.1` 

## 0.17.0


Thanks to https://github.com/compressed this release has a large amount of
important fixes and breaking changes. 

- Updates to support new `slack-api` version and remove dependencies on openssl `0.7.x` and hyper
`0.9.x`.

### Breaking Changes


- Replaced `websocket` with `tungstenite`. This change moves from `openssl` to `native-tls`.
- Updated to `slack-api` version `0.16.0`. This changes many of the re-exported types
from the `slack-api` crate.
- Replaced `rustc_serialize` with `serde`. This change was needed because the new `slack-api` uses
`serde`.
- Replaced `hyper` with `reqwest`.
- Removed `on_ping` from `EventHander`. Websocket pings are handled internally.
- `EventHander::on_event` passes in the `Event` directly. Any errors are logged using the `log`
crate. The raw json string argument has been removed.
- Removed `WsMessage::Ping` variant.
- Removed `Error` variants: `Error::JsonDecode` and `Error::JsonEncode`.
- All `Sender` related functions have been moved directly to `Sender`. `RtmClient::Client::sender()`
gives a reference to the `Sender`.
- The following `RtmClient` functions have been **removed**:
  - `post_message`, `update_message`, `delete_message`
  - `mark`
  - `set_topic`
  - `set_purpose`
  - `add_reaction` replaces `add_reaction_file` and `add_reaction_file_comment`
  - `im_open`, `im_close`, `im_history`, `im_list`, `im_mark`
  - `channels_history`
  - `get_name`
  - `get_id`
- Some `Event` variants are now inside a `Box` for performance reasons (see:
https://github.com/Manishearth/rust-clippy/wiki#large_enum_variant).
- `Event::MessageSent` and `Event::MessageError` expose new interior structs: `MessageSent` and
`MessageError` respectively.

## 0.16.0

- Retry receive message on EAGAIN (jwilm) (#61)
- Change type signatures of handlers to take Event instead of &Event (pinkisemils) (#62)
- Add send typing api and cleanup get_channel_id (vampolo) (#65)

## 0.15.0

- Add async message sending API thanks to https://github.com/jwilm

## 0.14.0

- Update dependencies thanks to https://github.com/jgulotta
- Update usage information for example thanks to https://github.com/wezm

## 0.13.0

- Thanks to https://github.com/squidpickles and https://github.com/dten respectively: add unnoficial events to handle message sending success and error, and add timeout on the rtm sockeckt.

### Compatibility Changes

- Two new Events: `MessageSent` and `MessageError`
- The RtmClient now has a 70 second timeout on the socket. This will be adjusted in the future.

## 0.12.2

- Thanks to https://github.com/squidpickles handle new reconnect_url events, and rewrite event API to use match instead of if/else branches. Also change dev-dependencies to specific versions to comply with crates.io

## 0.12.1

- overhaul websocket teardown logic.

## 0.12.0

- Overhauled event parsing and added Event type, updated the EventHandler api, updated dependencies, added Error::Utf8 for utf8 decoding errors, rustfmt-ed the sources, various bugfixes.

### Compatibility Changes

- EventHandler's on_receive is now on_event with a different signature that takes the raw json string as well as the result of parsing the Event, for less library-user parsing and greater flexibility.
- RtmClient's get_outs method has been removed, and the type of the channel used for passing messages between the working threads has changed.


## 0.11.0

- Bugfix changes the color field of User to `Option<String>`, see: https://github.com/BenTheElder/slack-rs/issues/22

## 0.10.1

- Massive overhaul, implement support for almost all of the bots api, stronger error handling and lots of tests. Thanks a ton to https://github.com/mthjones, see https://github.com/BenTheElder/slack-rs/pull/17 for the main overhaul.

### Compatibility Changes

Methods that previously returned `Result<String,Error>` now return a typed `Result<Some_Slack_Response_Type, Error>`:

- `RtmClient::post_message` now returns `Result<api::chat::PostMessageResponse, Error>`
- `RtmClient::delete_message` now returns `Result<api::chat::DeleteResponse, Error>`
- `RtmClient::mark` now returns `Result<api::channels::MarkResponse, Error>`
- `RtmClient::set_topic` now returns `Result<api::channels::SetTopicResponse, Error>`
- `RtmClient::set_purpose` now returns `Result<api::channels::SetPurposeResponse, Error>`
- `RtmClient::add_reaction_timestamp` now returns `Result<api::reactions::AddResponse, Error>`
- `RtmClient::add_reaction_file` now returns `Result<api::reactions::AddResponse, Error>`
- `RtmClient::add_reaction_file_comment` now returns `Result<api::reactions::AddResponse, Error>`
- `RtmClient::update_message` now returns `Result<api::chat::UpdateResponse, Error>`
- `RtmClient::im_open` now returns `Result<api::im::OpenResponse, Error>`
- `RtmClient::channels_history` now returns `Result<api::channels::HistoryResponse, Error>`
- `RtmClient::im_close` now returns `Result<api::im::CloseResponse, Error>`
- `RtmClient::im_history` now returns `Result<api::im::HistoryResponse, Error>`
- `RtmClient::im_list` now returns `Result<api::im::ListResponse, Error>`
- `RtmClient::im_mark` now returns `Result<api::im::MarkResponse, Error>`

Forthcoming releases will see the implementation of the remaining files.upload and some convenient helpers such as a message builder can be expected in a later release, and the Error::Api will expose Slack api error types more strongly in a forthcoming release.

## 0.9.2

- Add channels_history via https://github.com/jeehoonkang https://github.com/BenTheElder/slack-rs/pull/16

## 0.9.1

- With help from: https://github.com/mthjones, overhaul error handling and refactor, improve api support.
- Introduced slack::error::Error
- Added a number of bots api methods
- Fixed bug where setPurpose called setTopic instead [!]

## 0.8.3

- Moved example to examples dir thanks to https://github.com/mthjones: https://github.com/BenTheElder/slack-rs/pull/9

## 0.8.2

- Fix https://github.com/BenTheElder/slack-rs/issues/8

## 0.8.1

- Add some web api methods, add methods to map names to ids.
- TODO: expect the error type overhaul to be pushed back to 0.9.X

### Compatibility Changes

- RtmClient::new now takes the bot token/api_key and login, login_and_run do not.

## 0.7.2

- Bugfix via https://github.com/Farthen: https://github.com/BenTheElder/slack-rs/pull/6

## 0.7.1

- Cleaned up the api and json handling.
- TODO: expect better error handling in 0.8.X

### Compatibility Changes

- 'MessageHandler' is now 'EventHandler' and all of the slack data structs have been updated to match the api as closely as possible.

## 0.6.1

- Updated to stable rust.