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notes how to implement reconnecting and status reporting
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# Reconnecting
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# Reconnecting
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`HomeServerApi` notifies `Reconnecter` of network call failure
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`Reconnecter` listens for online/offline event
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`Reconnecter` polls `/versions` with a `RetryDelay` (implemented as ExponentialRetryDelay, also used by SendScheduler if no retry_after_ms is given)
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`Reconnecter` emits an event when sync and message sending should retry
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`Sync` listen to `Reconnecter`
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`Sync` notifies when the catchup sync has happened
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`Reconnecter` has state:
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- disconnected (and retrying at x seconds from timestamp)
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- reconnecting (call /versions, and if successful /sync)
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- connected
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`Reconnecter` has a method to try to connect now
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`SessionStatus` can be:
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- disconnected (and retrying at x seconds from timestamp)
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- reconnecting
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- connected (and syncing)
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- doing catchup sync
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- sending x / y messages
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rooms should report how many messages they have queued up, and each time they sent one?
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`SendReporter` (passed from `Session` to `Room`, passed down to `SendQueue`), with:
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- setPendingEventCount(roomId, count)
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`Session` listens to `Reconnecter` to update it's status, but perhaps we wait to send messages until catchup sync is done
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