Support COMMAND DOCS

packages/client/lib/commands/COMMAND_DOCS.ts

@@ -0,0 +1,38 @@
+import { RedisCommandArguments } from '.';
+import { pushVerdictArguments } from './generic-transformers';
+
+export const IS_READ_ONLY = true;
+
+export function transformArguments(keys: string | Array<string>): RedisCommandArguments {
+    return pushVerdictArguments(['COMMAND', 'DOCS'], keys);
+}
+
+type CommandDocumentation = {
+    summary: string;
+    since: string;
+    group: string;
+    complexity: string;
+    history?: Array<string>;
+};
+
+type CommandDocsReply = Array<[CommandName: string, CommandDocumentation: CommandDocumentation]>;
+
+export function transformReply(rawReply: Array<any>): CommandDocsReply {
+    const replyArray:CommandDocsReply = []
+
+    for (let i = 0; i < rawReply.length; i++) {
+        
+        replyArray.push([
+            rawReply[i++], // The name of the command
+            {
+                summary: rawReply[i][1],
+                since: rawReply[i][3],
+                group: rawReply[i][5],
+                complexity: rawReply[i][7],
+                history: rawReply[i][8] == 'history' ? rawReply[i][9] : null
+            }
+        ]);
+    }
+
+    return replyArray;
+}