Method invoke_

src/service/action-impl.js:671–737

* @param {!ActionInvocation} invocation * @return {?Promise} * @private

(invocation)

   * @private
   */
  invoke_(invocation) {
    const {method, tagOrTarget} = invocation;

    // Check that this action is allowlisted (if a allowlist is set).
    if (this.allowlist_) {
      if (!isActionAllowlisted(invocation, this.allowlist_)) {
        this.error_(
          `"${tagOrTarget}.${method}" is not allowlisted ${JSON.stringify(
            this.allowlist_
          )}.`
        );
        return null;
      }
    }

    // Handle global targets e.g. "AMP".
    const globalTarget = this.globalTargets_[tagOrTarget];
    if (globalTarget) {
      return globalTarget(invocation);
    }

    // Subsequent handlers assume that invocation target is an Element.
    const node = dev().assertElement(invocation.node);

    // Handle global actions e.g. "<any-element-id>.toggle".
    const globalMethod = this.globalMethodHandlers_[method];
    if (globalMethod && invocation.satisfiesTrust(globalMethod.minTrust)) {
      return globalMethod.handler(invocation);
    }

    // Handle element-specific actions.
    const lowerTagName = node.tagName.toLowerCase();
    if (isAmpTagName(lowerTagName)) {
      if (node.enqueAction) {
        node.enqueAction(invocation);
      } else {
        this.error_(`Unrecognized AMP element "${lowerTagName}".`, node);
      }
      return null;
    }

    // Special non-AMP elements with AMP ID or known supported actions.
    const nonAmpActions = NON_AMP_ELEMENTS_ACTIONS_[lowerTagName];
    // TODO(dvoytenko, #7063): switch back to `target.id` with form proxy.
    const targetId = node.getAttribute('id') || '';
    if (
      isAmpTagName(targetId) ||
      (nonAmpActions && nonAmpActions.indexOf(method) > -1)
    ) {
      const handler = node[ACTION_HANDLER_];
      if (handler) {
        handler(invocation);
      } else {
        node[ACTION_QUEUE_] = node[ACTION_QUEUE_] || [];
        node[ACTION_QUEUE_].push(invocation);
      }
      return null;
    }