@wordpress/hooks/build-module/createAddHook.js

WordPress hooks library.

// packages/hooks/src/createAddHook.ts
import validateNamespace from "./validateNamespace";
import validateHookName from "./validateHookName";
function createAddHook(hooks, storeKey) {
  return function addHook(hookName, namespace, callback, priority = 10) {
    const hooksStore = hooks[storeKey];
    if (!validateHookName(hookName)) {
      return;
    }
    if (!validateNamespace(namespace)) {
      return;
    }
    if ("function" !== typeof callback) {
      console.error("The hook callback must be a function.");
      return;
    }
    if ("number" !== typeof priority) {
      console.error(
        "If specified, the hook priority must be a number."
      );
      return;
    }
    const handler = { callback, priority, namespace };
    if (hooksStore[hookName]) {
      const handlers = hooksStore[hookName].handlers;
      let i;
      for (i = handlers.length; i > 0; i--) {
        if (priority >= handlers[i - 1].priority) {
          break;
        }
      }
      if (i === handlers.length) {
        handlers[i] = handler;
      } else {
        handlers.splice(i, 0, handler);
      }
      hooksStore.__current.forEach((hookInfo) => {
        if (hookInfo.name === hookName && hookInfo.currentIndex >= i) {
          hookInfo.currentIndex++;
        }
      });
    } else {
      hooksStore[hookName] = {
        handlers: [handler],
        runs: 0
      };
    }
    if (hookName !== "hookAdded") {
      hooks.doAction(
        "hookAdded",
        hookName,
        namespace,
        callback,
        priority
      );
    }
  };
}
var createAddHook_default = createAddHook;
export {
  createAddHook_default as default
};
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