Function parseGsapScript

packages/parsers/src/gsapParser.ts:1203–1238

(script: string)

// ── Public API ──────────────────────────────────────────────────────────────

export function parseGsapScript(script: string): ParsedGsap {
  try {
    const { detection, timelineVar, located } = parseGsapAst(script);
    const ref: TimelineRef = detection.ref ?? { kind: "identifier", name: "tl" };
    const animations = located.map((l) => l.animation);

    const declPattern =
      ref.kind === "identifier"
        ? `(?:const|let|var)\\s+${timelineVar}\\s*=\\s*gsap\\.timeline\\s*\\([^)]*\\)\\s*;?`
        : `${escapeRegExp(timelineVar)}\\s*=\\s*gsap\\.timeline\\s*\\([^)]*\\)\\s*;?`;
    const timelineMatch = script.match(new RegExp(`^[\\s\\S]*?${declPattern}`));
    const fallbackPreamble =
      ref.kind === "identifier"
        ? `const ${timelineVar} = gsap.timeline({ paused: true });`
        : `${timelineVar} = gsap.timeline({ paused: true });`;
    const preamble = timelineMatch?.[0] ?? fallbackPreamble;

    const lastCallIdx = script.lastIndexOf(`${timelineVar}.`);
    let postamble = "";
    if (lastCallIdx !== -1) {
      const afterLast = script.slice(lastCallIdx);
      const endOfCall = afterLast.indexOf(";");
      if (endOfCall !== -1) {
        postamble = script.slice(lastCallIdx + endOfCall + 1).trim();
      }
    }

    const result: ParsedGsap = { animations, timelineVar, preamble, postamble };
    if (detection.timelineCount > 1) result.multipleTimelines = true;
    if (detection.timelineCount > 0 && detection.ref === null)
      result.unsupportedTimelinePattern = true;
    return result;
  } catch {
    return { animations: [], timelineVar: "tl", preamble: "", postamble: "" };
  }
}

// ── In-place AST mutation helpers ───────────────────────────────────────────
//