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Correctly generate backpagination tokens for events which have the same depth (#996)

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* Correctly generate backpagination tokens for events which have the same depth

With tests. Unfortunately the code around here is hard to understand.
There will be a subsequent PR which fixes this up now that we have a test
harness in place.

* Add postgres impl

* More linting

* Fix psql statement so it actually works
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Kegsay 2020-05-01 11:01:34 +01:00 • committed by GitHub
parent e15f6676ac
commit b28674435e
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10 changed files with 238 additions and 80 deletions
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10
syncapi/types/types.go
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@ -64,8 +64,14 @@ const (
// /sync or /messages, for example.
type PaginationToken struct {
//Position StreamPosition
Type PaginationTokenType
PDUPosition StreamPosition
Type PaginationTokenType
// For /sync, this is the PDU position. For /messages, this is the topological position (depth).
// TODO: Given how different the positions are depending on the token type, they should probably be renamed
// or use different structs altogether.
PDUPosition StreamPosition
// For /sync, this is the EDU position. For /messages, this is the stream (PDU) position.
// TODO: Given how different the positions are depending on the token type, they should probably be renamed
// or use different structs altogether.
EDUTypingPosition StreamPosition
}