astro/dist/core/csp/runtime.js

Astro is a modern site builder with web best practices, performance, and DX front-of-mind.

function normalizeCspResourceEntry(entry) {
  if (typeof entry === "string") {
    return { resource: entry, kind: "default" };
  }
  return { resource: entry.resource, kind: entry.kind ?? "default" };
}
function normalizeCspHashEntry(entry) {
  if (typeof entry === "string") {
    return { hash: entry, kind: "default" };
  }
  return { hash: entry.hash, kind: entry.kind ?? "default" };
}
function partitionByKind(directive) {
  const groups = {
    default: { resources: [], hashes: [] },
    element: { resources: [], hashes: [] },
    attribute: { resources: [], hashes: [] }
  };
  for (const entry of directive.resources) {
    const { resource, kind } = normalizeCspResourceEntry(entry);
    groups[kind].resources.push(resource);
  }
  for (const entry of directive.hashes) {
    const { hash, kind } = normalizeCspHashEntry(entry);
    groups[kind].hashes.push(hash);
  }
  return groups;
}
function deduplicateDirectiveValues(existingDirective, newDirective) {
  const [directiveName, ...existingValues] = existingDirective.split(/\s+/).filter(Boolean);
  const [newDirectiveName, ...newValues] = newDirective.split(/\s+/).filter(Boolean);
  if (directiveName !== newDirectiveName) {
    return void 0;
  }
  const finalDirectives = Array.from(/* @__PURE__ */ new Set([...existingValues, ...newValues]));
  return `${directiveName} ${finalDirectives.join(" ")}`;
}
function pushDirective(directives, newDirective) {
  if (directives.length === 0) {
    return [newDirective];
  }
  const finalDirectives = [];
  let matched = false;
  for (const directive of directives) {
    if (matched) {
      finalDirectives.push(directive);
      continue;
    }
    const result = deduplicateDirectiveValues(directive, newDirective);
    if (result) {
      finalDirectives.push(result);
      matched = true;
    } else {
      finalDirectives.push(directive);
    }
  }
  if (!matched) {
    finalDirectives.push(newDirective);
  }
  return finalDirectives;
}
export {
  deduplicateDirectiveValues,
  normalizeCspHashEntry,
  normalizeCspResourceEntry,
  partitionByKind,
  pushDirective
};