@tanstack/db-ivm/dist/esm/operators/filter.js

Incremental View Maintenance for TanStack DB based on Differential Dataflow

var __typeError = (msg) => {
  throw TypeError(msg);
};
var __accessCheck = (obj, member, msg) => member.has(obj) || __typeError("Cannot " + msg);
var __privateGet = (obj, member, getter) => (__accessCheck(obj, member, "read from private field"), getter ? getter.call(obj) : member.get(obj));
var __privateAdd = (obj, member, value) => member.has(obj) ? __typeError("Cannot add the same private member more than once") : member instanceof WeakSet ? member.add(obj) : member.set(obj, value);
var __privateSet = (obj, member, value, setter) => (__accessCheck(obj, member, "write to private field"), setter ? setter.call(obj, value) : member.set(obj, value), value);
var _f;
import { LinearUnaryOperator, DifferenceStreamWriter } from "../graph.js";
import { StreamBuilder } from "../d2.js";
class FilterOperator extends LinearUnaryOperator {
  constructor(id, inputA, output, f) {
    super(id, inputA, output);
    __privateAdd(this, _f);
    __privateSet(this, _f, f);
  }
  inner(collection) {
    return collection.filter(__privateGet(this, _f));
  }
}
_f = new WeakMap();
function filter(f) {
  return (stream) => {
    const output = new StreamBuilder(
      stream.graph,
      new DifferenceStreamWriter()
    );
    const operator = new FilterOperator(
      stream.graph.getNextOperatorId(),
      stream.connectReader(),
      output.writer,
      f
    );
    stream.graph.addOperator(operator);
    return output;
  };
}
export {
  FilterOperator,
  filter
};
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