Function extractConditionsForVariable

packages/graph/src/astToSteps.ts:1291–1363

* Extract conditions that specifically reference a given variable.

(
  condition: Condition,
  variable: string,
)

 * Extract conditions that specifically reference a given variable.
 */
function extractConditionsForVariable(
  condition: Condition,
  variable: string,
): Condition | undefined {
  if (
    condition.type === "AndCondition" ||
    condition.type === "OrCondition" ||
    condition.type === "XorCondition"
  ) {
    const leftExtracted = extractConditionsForVariable(
      (condition as AndCondition | OrCondition | XorCondition).left,
      variable,
    );
    const rightExtracted = extractConditionsForVariable(
      (condition as AndCondition | OrCondition | XorCondition).right,
      variable,
    );

    const parts = [leftExtracted, rightExtracted].filter((c): c is Condition => c !== undefined);

    if (parts.length === 0) return undefined;
    if (parts.length === 1) return parts[0];
    if (condition.type === "AndCondition") {
      return {
        type: "AndCondition",
        left: parts[0]!,
        right: parts[1]!,
      } as AndCondition;
    } else if (condition.type === "OrCondition") {
      return {
        type: "OrCondition",
        left: parts[0]!,
        right: parts[1]!,
      } as OrCondition;
    } else {
      return {
        type: "XorCondition",
        left: parts[0]!,
        right: parts[1]!,
      } as XorCondition;
    }
  }

  // For simple conditions, check if they reference the target variable
  if (
    condition.type === "PropertyCondition" ||
    condition.type === "ExistsCondition" ||
    condition.type === "InCondition" ||
    condition.type === "IsNullCondition" ||
    condition.type === "RegexCondition" ||
    condition.type === "StringPredicateCondition"
  ) {
    const condVar = (
      condition as
        | PropertyCondition
        | ExistsCondition
        | InCondition
        | IsNullCondition