async function getPackageFsPath()

in src/explorerCommands/new.ts [146:185]
37 lines of code
10 McCabe index (conditional complexity)

async function getPackageFsPath(node: DataNode): Promise<string | undefined> {
    if (node.nodeData.kind === NodeKind.Project) {
        const childrenNodes: DataNode[] = await node.getChildren() as DataNode[];
        const packageRoots: any[] = childrenNodes.filter((child) => {
            return child.nodeData.kind === NodeKind.PackageRoot;
        });
        if (packageRoots.length < 1) {
            // This might happen for an invisible project with "_" as its root
            const packageNode: DataNode | undefined = childrenNodes.find((child) => {
                return child.nodeData.kind === NodeKind.Package;
            });
            if (!packageNode && node.uri) {
                // This means the .java files are in the default package.
                return Uri.parse(node.uri).fsPath;
            } else if (packageNode?.uri) {
                return getPackageRootPath(Uri.parse(packageNode.uri).fsPath, packageNode.name);
            }
            return "";
        } else if (packageRoots.length === 1) {
            return Uri.parse(packageRoots[0].uri).fsPath;
        } else {
            const options: ISourceRootPickItem[] = packageRoots.map((root) => {
                return {
                    label: root.name,
                    fsPath: Uri.parse(root.uri).fsPath,
                };
            });
            const choice: ISourceRootPickItem | undefined = await window.showQuickPick(options, {
                    placeHolder: "Choose a source folder",
                    ignoreFocusOut: true,
                },
            );
            return choice?.fsPath;
        }
    } else if (node.nodeData.kind === NodeKind.PrimaryType) {
        return node.uri ? path.dirname(Uri.parse(node.uri).fsPath) : "";
    }

    return node.uri ? Uri.parse(node.uri).fsPath : "";
}