@tanstack/db/dist/esm/query/extractors.js

A reactive client store for building super fast apps on sync

import { isFunctionCall, evaluateFunction } from "./functions.js";
function extractValueFromNamespacedRow(namespacedRow, columnRef, mainTableAlias, joinedTableAlias) {
  if (columnRef.includes(`.`)) {
    const [tableAlias, colName] = columnRef.split(`.`);
    const tableData = namespacedRow[tableAlias];
    if (!tableData) {
      return null;
    }
    const value = tableData[colName];
    return value;
  } else {
    if (mainTableAlias && namespacedRow[mainTableAlias]) {
      const mainTableData = namespacedRow[mainTableAlias];
      if (typeof mainTableData === `object` && columnRef in mainTableData) {
        return mainTableData[columnRef];
      }
    }
    if (joinedTableAlias && namespacedRow[joinedTableAlias]) {
      const joinedTableData = namespacedRow[joinedTableAlias];
      if (typeof joinedTableData === `object` && columnRef in joinedTableData) {
        return joinedTableData[columnRef];
      }
    }
    for (const [_tableAlias, tableData] of Object.entries(namespacedRow)) {
      if (tableData && typeof tableData === `object` && columnRef in tableData) {
        return tableData[columnRef];
      }
    }
    return void 0;
  }
}
function evaluateOperandOnNamespacedRow(namespacedRow, operand, mainTableAlias, joinedTableAlias) {
  if (typeof operand === `string` && operand.startsWith(`@`)) {
    const columnRef = operand.substring(1);
    return extractValueFromNamespacedRow(
      namespacedRow,
      columnRef,
      mainTableAlias,
      joinedTableAlias
    );
  }
  if (operand && typeof operand === `object` && `col` in operand) {
    const colRef = operand.col;
    if (typeof colRef === `string`) {
      const nestedValue = extractValueFromNamespacedRow(
        namespacedRow,
        colRef,
        mainTableAlias,
        joinedTableAlias
      );
      if (nestedValue === void 0 && colRef in namespacedRow) {
        return namespacedRow[colRef];
      }
      return nestedValue;
    }
    return void 0;
  }
  if (operand && typeof operand === `object` && isFunctionCall(operand)) {
    const functionName = Object.keys(operand)[0];
    const args = operand[functionName];
    const evaluatedArgs = Array.isArray(args) ? args.map(
      (arg) => evaluateOperandOnNamespacedRow(
        namespacedRow,
        arg,
        mainTableAlias,
        joinedTableAlias
      )
    ) : evaluateOperandOnNamespacedRow(
      namespacedRow,
      args,
      mainTableAlias,
      joinedTableAlias
    );
    return evaluateFunction(
      functionName,
      evaluatedArgs
    );
  }
  if (operand && typeof operand === `object` && `value` in operand) {
    return operand.value;
  }
  return operand;
}
function extractJoinKey(row, operand, defaultTableAlias) {
  let keyValue;
  if (typeof operand === `string` && operand.startsWith(`@`)) {
    const columnRef = operand.substring(1);
    if (columnRef.includes(`.`)) {
      const [tableAlias, colName] = columnRef.split(`.`);
      if (tableAlias === defaultTableAlias) {
        keyValue = row[colName];
      } else {
        keyValue = void 0;
      }
    } else {
      keyValue = row[columnRef];
    }
  } else if (operand && typeof operand === `object` && `col` in operand) {
    const colRef = operand.col;
    if (typeof colRef === `string`) {
      if (colRef.includes(`.`)) {
        const [tableAlias, colName] = colRef.split(`.`);
        if (tableAlias === defaultTableAlias) {
          keyValue = row[colName];
        } else {
          keyValue = void 0;
        }
      } else {
        keyValue = row[colRef];
      }
    }
  } else {
    keyValue = operand;
  }
  return keyValue;
}
export {
  evaluateOperandOnNamespacedRow,
  extractJoinKey,
  extractValueFromNamespacedRow
};
//# sourceMappingURL=extractors.js.map