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- 'use strict'
- const { AbandonedError } = require('../../errors')
- const geWindow = require('./ge-window')
- /**
- * Given a `msgID` and a set of `abandoned` messages, remove any abandoned
- * messages that existed _prior_ to the specified `msgID`. For example, let's
- * assume the server has sent 3 messages:
- *
- * 1. A search message.
- * 2. An abandon message for the search message.
- * 3. A new search message.
- *
- * When the response for message #1 comes in, if it does, it will be processed
- * normally due to the specification. Message #2 will not receive a response, or
- * if the server does send one since the spec sort of allows it, we won't do
- * anything with it because we just discard that listener. Now the response
- * for message #3 comes in. At this point, we will issue a purge of responses
- * by passing in `msgID = 3`. This result is that we will remove the tracking
- * for message #1.
- *
- * @param {integer} msgID An upper bound for the messages to be purged.
- * @param {Map} abandoned A set of abandoned messages. Each message is an object
- * `{ age: <id>, cb: <func> }` where `age` was the current message id when the
- * abandon message was sent.
- */
- module.exports = function purgeAbandoned (msgID, abandoned) {
- abandoned.forEach((val, key) => {
- if (geWindow(val.age, msgID) === false) return
- val.cb(new AbandonedError('client request abandoned'))
- abandoned.delete(key)
- })
- }
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