Expand cluster READ_COMMANDS with additional read-only commands and reorganize the list of commands by category (#3845)

* Updating the list with commands allowed to be sent to the read-only cluster replica nodes

* Applying review comment

Author: petyaslavova

redis/commands/cluster.py

@@ -51,20 +51,40 @@
 # https://redis.io/commands
 READ_COMMANDS = frozenset(
     [
+        # Bit Operations
         "BITCOUNT",
+        "BITFIELD_RO",
         "BITPOS",
+        # Scripting
         "EVAL_RO",
         "EVALSHA_RO",
-        "EXISTS",
-        "GEODIST",
-        "GEOHASH",
-        "GEOPOS",
-        "GEORADIUS",
-        "GEORADIUSBYMEMBER",
+        "FCALL_RO",
+        # Key Operations
+        "DBSIZE",
         "DIGEST",
+        "DUMP",
+        "EXISTS",
+        "EXPIRETIME",
+        "PEXPIRETIME",
+        "KEYS",
+        "SCAN",
+        "PTTL",
+        "RANDOMKEY",
+        "TTL",
+        "TYPE",
+        # String Operations
         "GET",
         "GETBIT",
         "GETRANGE",
+        "MGET",
+        "STRLEN",
+        "LCS",
+        # Geo Operations
+        "GEODIST",
+        "GEOHASH",
+        "GEOPOS",
+        "GEOSEARCH",
+        # Hash Operations
         "HEXISTS",
         "HGET",
         "HGETALL",
@@ -73,26 +93,69 @@
         "HMGET",
         "HSTRLEN",
         "HVALS",
-        "KEYS",
+        "HRANDFIELD",
+        "HEXPIRETIME",
+        "HPEXPIRETIME",
+        "HTTL",
+        "HPTTL",
+        "HSCAN",
+        # List Operations
         "LINDEX",
+        "LPOS",
         "LLEN",
         "LRANGE",
-        "MGET",
-        "PTTL",
-        "RANDOMKEY",
+        # Set Operations
         "SCARD",
         "SDIFF",
         "SINTER",
+        "SINTERCARD",
         "SISMEMBER",
+        "SMISMEMBER",
         "SMEMBERS",
         "SRANDMEMBER",
-        "STRLEN",
         "SUNION",
-        "TTL",
+        "SSCAN",
+        # Sorted Set Operations
         "ZCARD",
         "ZCOUNT",
+        "ZDIFF",
+        "ZINTER",
+        "ZINTERCARD",
+        "ZLEXCOUNT",
+        "ZMSCORE",
+        "ZRANDMEMBER",
         "ZRANGE",
+        "ZRANGEBYLEX",
+        "ZRANGEBYSCORE",
+        "ZRANK",
+        "ZREVRANGE",
+        "ZREVRANGEBYLEX",
+        "ZREVRANGEBYSCORE",
+        "ZREVRANK",
+        "ZSCAN",
         "ZSCORE",
+        "ZUNION",
+        # Stream Operations
+        "XLEN",
+        "XPENDING",
+        "XRANGE",
+        "XREAD",
+        "XREVRANGE",
+        # JSON Module
+        "JSON.ARRINDEX",
+        "JSON.ARRLEN",
+        "JSON.GET",
+        "JSON.MGET",
+        "JSON.OBJKEYS",
+        "JSON.OBJLEN",
+        "JSON.RESP",
+        "JSON.STRLEN",
+        "JSON.TYPE",
+        # RediSearch Module
+        "FT.EXPLAIN",
+        "FT.INFO",
+        "FT.PROFILE",
+        "FT.SEARCH",
     ]
 )