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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.
* ### SADD key member [member ...]
* Add the specified members to the set stored at key. Specified members that are already
* a member of this set are ignored. If key does not exist, a new set is created before
* adding the specified members.
*
* An error is returned when the value stored at key is not a set.
*
* ### Return value
* Integer reply: the number of elements that were added to the set, not including all the
* elements already present into the set.
*
* ### History
* >= 2.4: Accepts multiple member arguments. Redis versions before 2.4 are only able to add a
* single member per call. **unit-redis-ness implements the 2.4 version of this command.**
*/
export class SAddCommand extends IRespCommand {
public DbDataType = DataType.SET
public maxParams = -1
public minParams = 2
public name = "sadd"
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),
initial: DatabaseValue = db.getOrDefault(
skey,
new DatabaseValue(
DataType.SET,
new Set()
)
),
originalSet: Set<any> = initial.getSet(),
initialCount: number = originalSet.size;
this.logger.debug(`Initial key length of ${skey} is ${initialCount}`);
for (let index = 1; index < request.getParams().length; index++) {
const newValue = request.getParam(index);
if (!originalSet.has(newValue)) {
originalSet.add(newValue);
}
}
this.logger.debug(`Final key length of ${skey} is ${originalSet.size}`);
db.put(
skey,
DatabaseValue.set(originalSet)
);
return RedisToken.integer(originalSet.size - initialCount);
}
}
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