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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 | 1x 1x 1x 1x 1x 1x 1x 4x 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 { SortedSet } from "../../data/sorted-set";
import { RedisToken } from "../../protocol/redis-token";
import { IRespCommand } from "../resp-command";
/**
* Available since 2.0.0.
*
* ZCOUNT key min max
*
* Returns the number of elements in the sorted set at key with a score between min and max.
*
* The min and max arguments have the same semantic as described for ZRANGEBYSCORE.
*
* If the key does not exist then ZERO is returned.
*
* Note: the command has a complexity of just O(log(N)) because it uses elements ranks (see ZRANK)
* to get an idea of the range. Because of this there is no need to do a work proportional to the
* size of the range. **This may not be true for the unit-redis-ness implementation**
*
* **Return value**<br>
* Integer reply: the number of elements in the specified score range.
*/
export class ZCountCommand extends IRespCommand {
public DbDataType = DataType.ZSET
public maxParams = 3
public minParams = 3
public name = "zcount"
private DEFAULT_ERROR = "ERR min or max is not a float";
private logger: Logger = new Logger(module.id);
public execSync(request: IRequest, db: Database): RedisToken {
this.logger.debug(
`${request.getCommand()}.execute(%s)`,
...request.getParams()
);
const skey: string = request.getParam(0),
sMin: string = request.getParam(1),
sMax: string = request.getParam(2);
if (isNaN(Number(sMin)) || isNaN(Number(sMax))) {
return RedisToken.error(this.DEFAULT_ERROR);
}
let result: number = 0;
const dbKey: DatabaseValue = db.getOrDefault(
skey,
new DatabaseValue(
DataType.ZSET,
new SortedSet()
)
);
result = dbKey.getSortedSet().count(
Number(sMin),
Number(sMax)
);
return RedisToken.integer(result);
}
}
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