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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.
*
* SMOVE source destination member
*
* Move member from the set at source to the set at destination.
* **Unlike the original implementation, this operation is **NOT** atomic. The key will be removed**
* **from the source set before it is added to the destination set.**
*
* If the source set does not exist or does not contain the specified element, no operation
* is performed and 0 is returned. Otherwise, the element is removed from the source set and
* added to the destination set. When the specified element already exists in the destination
* set, it is only removed from the source set.
*
* An error is returned if source or destination does not hold a set value.
*
* **Return value**<br>
* Integer reply, specifically:
*
* 1 if the element is moved.
* 0 if the element is not a member of source and no operation was performed.
*/
export class SMoveCommand extends IRespCommand {
public DbDataType = DataType.SET
public maxParams = 3
public minParams = 3
public name = "smove"
private logger: Logger = new Logger(module.id);
public execSync(request: IRequest, db: Database): RedisToken {
this.logger.debug(
`${request.getCommand()}.execute(%s)`,
...request.getParams()
);
const skeyFrom: string = request.getParam(0),
skeyTo: string = request.getParam(1),
skeyName: string = request.getParam(2),
dbFrom: DatabaseValue = db.getOrDefault(
skeyFrom,
new DatabaseValue(
DataType.SET,
new Set()
)
),
dbTo: DatabaseValue = db.getOrDefault(
skeyTo,
new DatabaseValue(
DataType.SET,
new Set()
)
);
let result = 0;
if (dbFrom.getSet().has(skeyName)) {
dbFrom.getSet().delete(skeyName);
if (!dbTo.getSet().has(skeyName)) {
dbTo.getSet().add(skeyName);
db.put(
skeyTo,
DatabaseValue.set(dbTo.getSet())
);
result = 1;
} else {
this.logger.debug(`${skeyTo}.${skeyName} already exists`);
result = 1;
}
db.put(
skeyFrom,
DatabaseValue.set(dbFrom.getSet())
);
} else {
this.logger.debug(`Did not find ${skeyFrom}.${skeyName}`);
}
return RedisToken.integer(result);
}
}
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