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refactor: split out grabbing state to reduce cyclo complexity

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This commit is contained in:
Kegan Dougal 2020-03-17 16:43:45 +00:00
parent 137b58a8a9
commit 5f7ff41ed9
1 changed files with 30 additions and 26 deletions
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56
roomserver/query/query.go
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@ -637,12 +637,6 @@ func (r *RoomserverQueryAPI) QueryStateAndAuthChain(
request *api.QueryStateAndAuthChainRequest,
response *api.QueryStateAndAuthChainResponse,
) error {
// TODO: get the correct room version
roomState, err := state.GetStateResolutionAlgorithm(state.StateResolutionAlgorithmV1, r.DB)
if err != nil {
return err
}
response.QueryStateAndAuthChainRequest = *request
roomNID, err := r.DB.RoomNID(ctx, request.RoomID)
if err != nil {
@ -653,30 +647,12 @@ func (r *RoomserverQueryAPI) QueryStateAndAuthChain(
}
response.RoomExists = true
prevStates, err := r.DB.StateAtEventIDs(ctx, request.PrevEventIDs)
stateEvents, err := r.loadStateAtEventIDs(ctx, request.PrevEventIDs)
if err != nil {
switch err.(type) {
case types.MissingEventError:
return nil
default:
return err
}
return err
}
response.PrevEventsExist = true
// Look up the currrent state for the requested tuples.
stateEntries, err := roomState.LoadCombinedStateAfterEvents(
ctx, prevStates,
)
if err != nil {
return err
}
stateEvents, err := r.loadStateEvents(ctx, stateEntries)
if err != nil {
return err
}
// add the auth event IDs for the current state events too
var authEventIDs []string
authEventIDs = append(authEventIDs, request.AuthEventIDs...)
@ -707,6 +683,34 @@ func (r *RoomserverQueryAPI) QueryStateAndAuthChain(
return err
}
func (r *RoomserverQueryAPI) loadStateAtEventIDs(ctx context.Context, eventIDs []string) ([]gomatrixserverlib.Event, error) {
// TODO: get the correct room version
roomState, err := state.GetStateResolutionAlgorithm(state.StateResolutionAlgorithmV1, r.DB)
if err != nil {
return nil, err
}
prevStates, err := r.DB.StateAtEventIDs(ctx, eventIDs)
if err != nil {
switch err.(type) {
case types.MissingEventError:
return nil, nil
default:
return nil, err
}
}
// Look up the currrent state for the requested tuples.
stateEntries, err := roomState.LoadCombinedStateAfterEvents(
ctx, prevStates,
)
if err != nil {
return nil, err
}
return r.loadStateEvents(ctx, stateEntries)
}
// getAuthChain fetches the auth chain for the given auth events. An auth chain
// is the list of all events that are referenced in the auth_events section, and
// all their auth_events, recursively. The returned set of events contain the