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Adds an iterate method that returns a (Async)Generator #29

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Adds an iterate method that returns a (Async)Generator #29

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4c06ff6
adds iterate method for level, sqlite, indexdb
theSherwood Jan 30, 2024
d610979
updates types and adds tests
theSherwood Jan 31, 2024
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9 changes: 9 additions & 0 deletions src/database/async/AsyncTupleDatabase.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,15 @@ export class AsyncTupleDatabase implements AsyncTupleDatabaseApi {
return this.storage.scan({ ...bounds, reverse, limit })
}

iterate(
args: ScanStorageArgs = {},
txId?: TxId
): AsyncGenerator<KeyValuePair> | Generator<KeyValuePair> {
const { reverse, limit, ...bounds } = args
if (txId) this.log.read(txId, bounds)
return this.storage.iterate({ ...bounds, reverse, limit })
}

async subscribe(
args: ScanStorageArgs,
callback: AsyncCallback
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14 changes: 14 additions & 0 deletions src/database/async/AsyncTupleDatabaseClient.ts
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Expand Up @@ -6,6 +6,7 @@ import {
prependPrefixToTuple,
prependPrefixToWriteOps,
removePrefixFromTuple,
removePrefixFromTupleValuePair,
removePrefixFromTupleValuePairs,
removePrefixFromWriteOps,
} from "../../helpers/subspaceHelpers"
Expand Down Expand Up @@ -44,6 +45,19 @@ export class AsyncTupleDatabaseClient<S extends KeyValuePair = KeyValuePair>
return result as FilterTupleValuePairByPrefix<S, P>[]
}

async *iterate<T extends S["key"], P extends TuplePrefix<T>>(
args: ScanArgs<T, P> = {},
txId?: TxId
): AsyncGenerator<FilterTupleValuePairByPrefix<S, P>> {
const storageScanArgs = normalizeSubspaceScanArgs(this.subspacePrefix, args)
for await (const pair of this.db.iterate(storageScanArgs, txId)) {
yield removePrefixFromTupleValuePair(
this.subspacePrefix,
pair
) as FilterTupleValuePairByPrefix<S, P>
}
}

async subscribe<T extends S["key"], P extends TuplePrefix<T>>(
args: ScanArgs<T, P>,
callback: AsyncCallback<FilterTupleValuePairByPrefix<S, P>>
Expand Down
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