V5 bringing RESP3, Sentinel and TypeMapping to node-redis

RESP3 Support
   - Some commands responses in RESP3 aren't stable yet and therefore return an "untyped" ReplyUnion.
 
Sentinel

TypeMapping

Correctly types Multi commands

Note: some API changes to be further documented in v4-to-v5.md

packages/client/lib/sentinel/commands/SENTINEL_MASTER.ts

@@ -0,0 +1,12 @@
+import { RedisArgument, MapReply, BlobStringReply, Command } from '../../RESP/types';
+import { transformTuplesReply } from '../../commands/generic-transformers';
+
+export default {
+  transformArguments(dbname: RedisArgument) {
+    return ['SENTINEL', 'MASTER', dbname];
+  },
+  transformReply: {
+    2: transformTuplesReply<BlobStringReply>,
+    3: undefined as unknown as () => MapReply<BlobStringReply, BlobStringReply>
+  }
+} as const satisfies Command;

packages/client/lib/sentinel/commands/SENTINEL_MONITOR.ts

@@ -0,0 +1,8 @@
+import { RedisArgument, SimpleStringReply, Command } from '../../RESP/types';
+
+export default {
+  transformArguments(dbname: RedisArgument, host: RedisArgument, port: RedisArgument, quorum: RedisArgument) {
+    return ['SENTINEL', 'MONITOR', dbname, host, port, quorum];
+  },
+  transformReply: undefined as unknown as () => SimpleStringReply<'OK'> 
+} as const satisfies Command;

packages/client/lib/sentinel/commands/SENTINEL_REPLICAS.ts

@@ -0,0 +1,23 @@
+import { RedisArgument, ArrayReply, BlobStringReply, MapReply, Command, TypeMapping, UnwrapReply } from '../../RESP/types';
+import { transformTuplesReply } from '../../commands/generic-transformers';
+
+export default {
+  transformArguments(dbname: RedisArgument) {
+    return ['SENTINEL', 'REPLICAS', dbname];
+  },
+  transformReply: {
+    2: (reply: ArrayReply<ArrayReply<BlobStringReply>>, preserve?: any, typeMapping?: TypeMapping) => {
+      const inferred = reply as unknown as UnwrapReply<typeof reply>;
+      const initial: Array<MapReply<BlobStringReply, BlobStringReply>> = [];
+
+      return inferred.reduce(
+        (sentinels: Array<MapReply<BlobStringReply, BlobStringReply>>, x: ArrayReply<BlobStringReply>) => {
+          sentinels.push(transformTuplesReply(x, undefined, typeMapping)); 
+          return sentinels;
+        }, 
+        initial
+      );
+    },
+    3: undefined as unknown as () => ArrayReply<MapReply<BlobStringReply, BlobStringReply>>
+  }
+} as const satisfies Command;

packages/client/lib/sentinel/commands/SENTINEL_SENTINELS.ts

@@ -0,0 +1,23 @@
+import { RedisArgument, ArrayReply, MapReply, BlobStringReply, Command, TypeMapping, UnwrapReply } from '../../RESP/types';
+import { transformTuplesReply } from '../../commands/generic-transformers';
+
+export default {
+  transformArguments(dbname: RedisArgument) {
+    return ['SENTINEL', 'SENTINELS', dbname];
+  },
+  transformReply: {
+    2: (reply: ArrayReply<ArrayReply<BlobStringReply>>, preserve?: any, typeMapping?: TypeMapping) => {
+      const inferred = reply as unknown as UnwrapReply<typeof reply>;
+      const initial: Array<MapReply<BlobStringReply, BlobStringReply>> = [];
+      
+      return inferred.reduce(
+        (sentinels: Array<MapReply<BlobStringReply, BlobStringReply>>, x: ArrayReply<BlobStringReply>) => {
+          sentinels.push(transformTuplesReply(x, undefined, typeMapping)); 
+          return sentinels;
+        }, 
+        initial
+      );
+    },
+    3: undefined as unknown as () => ArrayReply<MapReply<BlobStringReply, BlobStringReply>>
+  }
+} as const satisfies Command;

packages/client/lib/sentinel/commands/SENTINEL_SET.ts

@@ -0,0 +1,19 @@
+import { RedisArgument, SimpleStringReply, Command } from '../../RESP/types';
+
+export type SentinelSetOptions = Array<{
+  option: RedisArgument;
+  value: RedisArgument;
+}>;
+
+export default {
+  transformArguments(dbname: RedisArgument, options: SentinelSetOptions) {
+    const args = ['SENTINEL', 'SET', dbname];
+
+    for (const option of options) {
+      args.push(option.option, option.value);
+    }
+
+    return args;
+  },
+  transformReply: undefined as unknown as () => SimpleStringReply<'OK'> 
+} as const satisfies Command;

packages/client/lib/sentinel/commands/index.ts

@@ -0,0 +1,19 @@
+import { RedisCommands } from '../../RESP/types';
+import SENTINEL_MASTER from './SENTINEL_MASTER';
+import SENTINEL_MONITOR from './SENTINEL_MONITOR';
+import SENTINEL_REPLICAS from './SENTINEL_REPLICAS';
+import SENTINEL_SENTINELS from './SENTINEL_SENTINELS';
+import SENTINEL_SET from './SENTINEL_SET';
+
+export default {
+  SENTINEL_SENTINELS,
+  sentinelSentinels: SENTINEL_SENTINELS,
+  SENTINEL_MASTER,
+  sentinelMaster: SENTINEL_MASTER,
+  SENTINEL_REPLICAS,
+  sentinelReplicas: SENTINEL_REPLICAS,
+  SENTINEL_MONITOR,
+  sentinelMonitor: SENTINEL_MONITOR,
+  SENTINEL_SET,
+  sentinelSet: SENTINEL_SET
+} as const satisfies RedisCommands;