@tanstack/db/dist/esm/query/compiler/expressions.js

A reactive client store for building super fast apps on sync

import { Value, getPropRefSourceAlias, PropRef, getPropRefPropertyPath, Func } from "../ir.js";
function getSourceAliasesFromExpression(expr) {
  switch (expr.type) {
    case `ref`: {
      const sourceAlias = getPropRefSourceAlias(expr) ?? expr.path[0];
      return new Set(sourceAlias ? [sourceAlias] : []);
    }
    case `func`: {
      const sourceAliases = /* @__PURE__ */ new Set();
      for (const arg of expr.args) {
        for (const alias of getSourceAliasesFromExpression(arg)) {
          sourceAliases.add(alias);
        }
      }
      return sourceAliases;
    }
    default:
      return /* @__PURE__ */ new Set();
  }
}
function normalizeExpressionPaths(whereClause, collectionAlias) {
  const tpe = whereClause.type;
  if (tpe === `val`) {
    return new Value(whereClause.value);
  } else if (tpe === `ref`) {
    const path = whereClause.path;
    const sourceAlias = getPropRefSourceAlias(whereClause);
    if (Array.isArray(path)) {
      if (sourceAlias === collectionAlias) {
        return new PropRef(getPropRefPropertyPath(whereClause));
      } else if (sourceAlias !== void 0) {
        return new PropRef(path, sourceAlias);
      } else if (path[0] === collectionAlias && path.length > 1) {
        return new PropRef(path.slice(1));
      } else if (path.length === 1 && path[0] !== void 0) {
        return new PropRef([path[0]]);
      }
    }
    return new PropRef(Array.isArray(path) ? path : [String(path)]);
  } else {
    const args = [];
    for (const arg of whereClause.args) {
      const convertedArg = normalizeExpressionPaths(
        arg,
        collectionAlias
      );
      args.push(convertedArg);
    }
    return new Func(whereClause.name, args);
  }
}
function normalizeOrderByPaths(orderBy, collectionAlias) {
  const normalizedOrderBy = orderBy.map((clause) => {
    const basicExp = normalizeExpressionPaths(
      clause.expression,
      collectionAlias
    );
    return {
      ...clause,
      expression: basicExp
    };
  });
  return normalizedOrderBy;
}
export {
  getSourceAliasesFromExpression,
  normalizeExpressionPaths,
  normalizeOrderByPaths
};
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