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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 | 1x 1x 1x 1x 1x 4x 4x 4x 4x 4x | import { Logger } from "../../../logger";
import { IRequest } from "../../../server/request";
import { DataType } from "../../data/data-type";
import { Database } from "../../data/database";
import { DatabaseValue } from "../../data/database-value";
import { RedisToken } from "../../protocol/redis-token";
import { IRespCommand } from "../resp-command";
/**
* ### Available since 1.0.0.
* ### SREM key member [member ...]
*
* Remove the specified members from the set stored at key. Specified members that are not a
* member of this set are ignored. If key does not exist, it is treated as an empty set and
* this command returns 0.
*
* An error is returned when the value stored at key is not a set.
* ### Return value
* Integer reply: the number of members that were removed from the set, not including non
* existing members.
* ### History
* >= 2.4: Accepts multiple member arguments. Redis versions older than 2.4 can only remove a
* set member per call.
* ### Examples
* ```
* redis> SADD myset "one"
* (integer) 1
* redis> SADD myset "two"
* (integer) 1
* redis> SADD myset "three"
* (integer) 1
* redis> SREM myset "one"
* (integer) 1
* redis> SREM myset "four"
* (integer) 0
* redis> SMEMBERS myset
* 1) "three"
* 2) "two"
* redis>
* ```
*/
export class SRemCommand extends IRespCommand {
public DbDataType = DataType.SET
public maxParams = -1
public minParams = 2
public name = "srem"
private logger: Logger = new Logger(module.id);
public execSync(request: IRequest, db: Database): RedisToken {
this.logger.debug(
`${request.getCommand()}.execute(%s)`,
...request.getParams()
);
const key: string = request.getParam(0),
dbKey: DatabaseValue = db.get(key);
if (!dbKey) {
this.logger.debug(`Key ${key} does not exist. Returning ZERO`);
return RedisToken.integer(0);
}
let results: number = 0;
for (let index = 1; index < request.getParams().length; index++) {
const member = request.getParam(index);
this.logger.debug(`Checking key ${key} for member ${member}`);
if (dbKey.getSet().has(member)) {
this.logger.debug(`Removing member ${member} from key ${key}`);
dbKey.getSet().delete(member);
++results;
}
}
if (results > 0) {
if (dbKey.getSet().size > 0) {
this.logger.debug(
`Saving updated set ${key} as %s`,
...dbKey.getSet()
);
db.put(
key,
dbKey
);
} else {
this.logger.debug(`Removing empty set ${key}`);
db.remove(key);
}
}
return RedisToken.integer(results);
}
}
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