traverse()

in packages/cdk-graph/src/core/utils.ts [169:226]
55 lines of code
9 McCabe index (conditional complexity)

  traverse(from).forEach(function (this: traverse.TraverseContext) {
    switch (this.key) {
      case ReferenceTypeEnum.ATTRIBUTE: {
        const [logicalId, attribute] = this.node as [string, string];
        references.push({
          source,
          referenceType: ReferenceTypeEnum.ATTRIBUTE,
          target: logicalId,
          value: attribute,
        });
        this.block();
        break;
      }
      case ReferenceTypeEnum.REF: {
        if (typeof this.node === "string") {
          if (!IGNORE_REF_PATTERN.test(this.node)) {
            references.push({
              source,
              referenceType: ReferenceTypeEnum.REF,
              target: this.node as string,
            });
          }
        } else {
          console.warn(`Found non-string "Ref"`, this.node);
        }
        this.block();
        break;
      }
      case ReferenceTypeEnum.IMPORT: {
        // "Fn::ImportValue": "Ada:ExportsOutputFnGetAttCommonStackA8F9EE77OutputsAdaCommonStackCounterTable5D6ADA16ArnED1AF27F"
        // "Fn::ImportValue": "Stage-Ada:ExportsOutputFnGetAttCommonStackA8F9EE77OutputsAdaCommonStackCounterTable5D6ADA16ArnED1AF27F"
        references.push({
          source,
          referenceType: ReferenceTypeEnum.IMPORT,
          // NB: remove stage - separator
          target: (this.node as string).replace("-", ""),
        });
        this.block();
        break;
      }
      case "Fn::Join": {
        if (
          Array.isArray(this.node) &&
          this.node.flatMap(String).join("").startsWith("arn:")
        ) {
          const potentialImportArn = {
            "Fn::Join": this.node,
          };
          references.push({
            source,
            referenceType: ReferenceTypeEnum.IMPORT_ARN,
            target: tokenizeImportArn(potentialImportArn),
          });
        }
        break;
      }
    }
  });