Outbox type: Make `sender_id` required; add optional `stream_id`.#4667

Merged

chrisbobbe merged 9 commits into

zulip:masterfrom

chrisbobbe:pr-outbox-sender-stream-ids

May 10, 2021

Commits on May 10, 2021

migrations [nfc]: Comment on what migration 28 was for.
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types: Make `sender_id` on `Outbox` required.
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types [nfc]: Put `sender_id` along with its friends.
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getHtmlPieceDescriptors tests: Add invariant before reading `x.isBrief`.
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getHtmlPieceDescriptors tests: Start type-checking, use example data.
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getHtmlPieceDescriptors: Use Outbox's `sender_id`, now that we can.
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types: Express Outbox as `PmOutbox | StreamOutbox`.
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exampleData [nfc]: Make `makeOutboxMessage` specific to `StreamOutbox`es.
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types: Add optional `stream_id` to `StreamOutbox`.
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