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iterator.go
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/
iterator.go
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package keeper
import (
"encoding/json"
"github.com/dymensionxyz/dymension/v3/x/streamer/types"
db "github.com/tendermint/tm-db"
sdk "github.com/cosmos/cosmos-sdk/types"
)
// iterator returns an iterator over all streams in the {prefix} space of state.
func (k Keeper) iterator(ctx sdk.Context, prefix []byte) sdk.Iterator {
store := ctx.KVStore(k.storeKey)
return sdk.KVStorePrefixIterator(store, prefix)
}
// StreamsIterator returns the iterator for all streams.
func (k Keeper) StreamsIterator(ctx sdk.Context) sdk.Iterator {
return k.iterator(ctx, types.KeyPrefixStreams)
}
// UpcomingStreamsIterator returns the iterator for all upcoming streams.
func (k Keeper) UpcomingStreamsIterator(ctx sdk.Context) sdk.Iterator {
return k.iterator(ctx, types.KeyPrefixUpcomingStreams)
}
// ActiveStreamsIterator returns the iterator for all active streams.
func (k Keeper) ActiveStreamsIterator(ctx sdk.Context) sdk.Iterator {
return k.iterator(ctx, types.KeyPrefixActiveStreams)
}
// FinishedStreamsIterator returns the iterator for all finished streams.
func (k Keeper) FinishedStreamsIterator(ctx sdk.Context) sdk.Iterator {
return k.iterator(ctx, types.KeyPrefixFinishedStreams)
}
// getStreamsFromIterator iterates over everything in a stream's iterator, until it reaches the end. Return all streams iterated over.
func (k Keeper) getStreamsFromIterator(ctx sdk.Context, iterator db.Iterator) []types.Stream {
streams := []types.Stream{}
defer iterator.Close() // nolint: errcheck
for ; iterator.Valid(); iterator.Next() {
streamIDs := []uint64{}
err := json.Unmarshal(iterator.Value(), &streamIDs)
if err != nil {
panic(err)
}
for _, streamID := range streamIDs {
stream, err := k.GetStreamByID(ctx, streamID)
if err != nil {
panic(err)
}
streams = append(streams, *stream)
}
}
return streams
}