Function extractCompositionMetadata

packages/parsers/src/htmlParser.ts:770–792

(html: string)

}

export function extractCompositionMetadata(html: string): CompositionMetadata {
  const parser = new DOMParser();
  const doc = parser.parseFromString(html, "text/html");
  const htmlEl = doc.documentElement;
  if (!htmlEl) {
    throw new CompositionHtmlParseError(
      "extractCompositionMetadata: input HTML is empty or could not be parsed",
    );
  }

  const compositionId = htmlEl.getAttribute("data-composition-id");
  const durationStr = htmlEl.getAttribute("data-composition-duration");
  const compositionDuration = durationStr ? parseFloat(durationStr) : null;

  const variables = parseCompositionVariables(htmlEl);

  return {
    compositionId,
    compositionDuration:
      compositionDuration && isFinite(compositionDuration) ? compositionDuration : null,
    variables,
  };
}

function parseCompositionVariables(htmlEl: Element): CompositionVariable[] {
  const variablesAttr = htmlEl.getAttribute("data-composition-variables");