Support multi search providers

- add `providers` option in search widget, value is array of provider name, like: `[google, bing]`

src/components/widgets/search/search.jsx

@@ -1,7 +1,8 @@
-import { useState } from "react";
+import { useState, useEffect, Fragment } from "react";
 import { useTranslation } from "next-i18next";
 import { FiSearch } from "react-icons/fi";
 import { SiDuckduckgo, SiMicrosoftbing, SiGoogle, SiBaidu, SiBrave } from "react-icons/si";
+import { Listbox, Transition } from "@headlessui/react";
 
 export const searchProviders = {
   google: {
@@ -36,21 +37,59 @@ export const searchProviders = {
   },
 };
 
+function classNames(...classes) {
+  return classes.filter(Boolean).join(" ");
+}
+
+function useProviderState() {
+  const key = "search-name";
+
+  const [value, setValue] = useState(providers.google);
+  useEffect(() => {
+    const storedName = localStorage.getItem(key);
+    let storedProvider = null;
+    if (storedName) {
+      storedProvider = Object.values(providers).find((el) => el.name === storedName);
+      if (storedProvider) {
+        setValue(storedProvider);
+      }
+    }
+  }, []);
+
+  return [
+    value,
+    (val) => {
+      setValue(val);
+      localStorage.setItem(key, val.name);
+    },
+  ];
+}
+
+function getAvailableProviderIds(options) {
+  if (options.providers && Array.isArray(options.providers)) {
+    return Object.keys(providers).filter((value) => options.providers.includes(value));
+  }
+  return null;
+}
+
 export default function Search({ options }) {
   const { t } = useTranslation();
 
   const provider = searchProviders[options.provider];
   const [query, setQuery] = useState("");
+  const [selectedProvider, setSelectedProvider] = useProviderState();
 
-  if (!provider) {
+  const availableProviderIds = getAvailableProviderIds(options);
+  if (!provider && !availableProviderIds) {
     return null;
   }
 
   function handleSubmit(event) {
     const q = encodeURIComponent(query);
 
-    if (provider.url) {
-      window.open(`${provider.url}${q}`, options.target || "_blank");
+    const url = provider ? provider.url : selectedProvider.url;
+    if (url) {
+      window.open(`${url}${q}`, options.target || "_blank");
     } else {
       window.open(`${options.url}${q}`, options.target || "_blank");
     }
@@ -60,6 +99,73 @@ export default function Search({ options }) {
     setQuery("");
   }
 
+  const multiProviders = () => (
+    <Listbox as="div" value={selectedProvider} onChange={setSelectedProvider} className="relative text-left">
+      <div>
+        <Listbox.Button
+          className="
+      absolute right-0.5 bottom-0.5 rounded-r-md px-4 py-2 border-1
+      text-white font-medium text-sm
+      bg-theme-600/40 dark:bg-white/10
+      focus:ring-theme-500 dark:focus:ring-white/50"
+        >
+          <selectedProvider.icon className="text-white w-3 h-3" />
+          <span className="sr-only">{t("search.search")}</span>
+        </Listbox.Button>
+      </div>
+
+      <Transition
+        as={Fragment}
+        enter="transition ease-out duration-100"
+        enterFrom="transform opacity-0 scale-95"
+        enterTo="transform opacity-100 scale-100"
+        leave="transition ease-in duration-75"
+        leaveFrom="transform opacity-100 scale-100"
+        leaveTo="transform opacity-0 scale-95"
+      >
+        <Listbox.Options
+          className="absolute right-0 z-10 mt-1 origin-top-right rounded-md 
+          bg-theme-100 dark:bg-theme-600 shadow-lg 
+          ring-1 ring-black ring-opacity-5 focus:outline-none"
+        >
+          <div className="flex flex-col">
+            {availableProviderIds.map((providerId) => {
+              const p = providers[providerId];
+              return (
+                <Listbox.Option key={providerId} value={p} as={Fragment}>
+                  {({ active }) => (
+                    <li
+                      className={classNames(
+                        "rounded-md cursor-pointer",
+                        active ? "bg-theme-600/10 dark:bg-white/10 dark:text-gray-900" : "dark:text-gray-100"
+                      )}
+                    >
+                      <p.icon className="h-4 w-4 mx-4 my-2" />
+                    </li>
+                  )}
+                </Listbox.Option>
+              );
+            })}
+          </div>
+        </Listbox.Options>
+      </Transition>
+    </Listbox>
+  );
+
+  const singleProvider = () => (
+    <button
+      type="submit"
+      className="
+        absolute right-0.5 bottom-0.5 rounded-r-md px-4 py-2 border-1
+        text-white font-medium text-sm
+        bg-theme-600/40 dark:bg-white/10
+        focus:ring-theme-500 dark:focus:ring-white/50"
+    >
+      <provider.icon className="text-white w-3 h-3" />
+      <span className="sr-only">{t("search.search")}</span>
+    </button>
+  );
+
   return (
     <form className="flex-col relative h-8 my-4 min-w-fit grow first:ml-0 ml-4" onSubmit={handleSubmit}>
       <div className="flex absolute inset-y-0 left-0 items-center pl-3 pointer-events-none w-full text-theme-800 dark:text-white" />
@@ -82,17 +188,7 @@ export default function Search({ options }) {
         // eslint-disable-next-line jsx-a11y/no-autofocus
         autoFocus={options.focus}
       />
-      <button
-        type="submit"
-        className="
-        absolute right-0.5 bottom-0.5 rounded-r-md px-4 py-2 border-1
-        text-white font-medium text-sm
-        bg-theme-600/40 dark:bg-white/10
-        focus:ring-theme-500 dark:focus:ring-white/50"
-      >
-        <provider.icon className="text-white w-3 h-3" />
-        <span className="sr-only">{t("search.search")}</span>
-      </button>
+      {provider ? singleProvider() : multiProviders()}
     </form>
   );
 }