chores(doc): Update documentation (#2145)

* Update app architecture with typesense

* Update readme

* Added local search

* replace diagram

* Update search page

docs/src/theme/SearchBar/index.js

@@ -0,0 +1,114 @@
+import React, { useRef, useCallback, useState } from "react";
+import classnames from "classnames";
+import { useHistory } from "@docusaurus/router";
+import useDocusaurusContext from "@docusaurus/useDocusaurusContext";
+import { usePluginData } from '@docusaurus/useGlobalData';
+import useIsBrowser from "@docusaurus/useIsBrowser";
+const Search = props => {
+  const initialized = useRef(false);
+  const searchBarRef = useRef(null);
+  const [indexReady, setIndexReady] = useState(false);
+  const history = useHistory();
+  const { siteConfig = {} } = useDocusaurusContext();
+  const isBrowser = useIsBrowser();
+  const { baseUrl } = siteConfig;
+  const initAlgolia = (searchDocs, searchIndex, DocSearch) => {
+      new DocSearch({
+        searchDocs,
+        searchIndex,
+        baseUrl,
+        inputSelector: "#search_input_react",
+        // Override algolia's default selection event, allowing us to do client-side
+        // navigation and avoiding a full page refresh.
+        handleSelected: (_input, _event, suggestion) => {
+          const url = suggestion.url || "/";
+          // Use an anchor tag to parse the absolute url into a relative url
+          // Alternatively, we can use new URL(suggestion.url) but its not supported in IE
+          const a = document.createElement("a");
+          a.href = url;
+          // Algolia use closest parent element id #__docusaurus when a h1 page title does not have an id
+          // So, we can safely remove it. See https://github.com/facebook/docusaurus/issues/1828 for more details.
+
+          history.push(url);
+        }
+      });
+  };
+
+  const pluginData = usePluginData('docusaurus-lunr-search');
+  const getSearchDoc = () =>
+    process.env.NODE_ENV === "production"
+      ? fetch(`${baseUrl}${pluginData.fileNames.searchDoc}`).then((content) => content.json())
+      : Promise.resolve([]);
+
+  const getLunrIndex = () =>
+    process.env.NODE_ENV === "production"
+      ? fetch(`${baseUrl}${pluginData.fileNames.lunrIndex}`).then((content) => content.json())
+      : Promise.resolve([]);
+
+  const loadAlgolia = () => {
+    if (!initialized.current) {
+      Promise.all([
+        getSearchDoc(),
+        getLunrIndex(),
+        import("./DocSearch"),
+        import("./algolia.css")
+      ]).then(([searchDocs, searchIndex, { default: DocSearch }]) => {
+        if (searchDocs.length === 0) {
+          return;
+        }
+        initAlgolia(searchDocs, searchIndex, DocSearch);
+        setIndexReady(true);
+      });
+      initialized.current = true;
+    }
+  };
+
+  const toggleSearchIconClick = useCallback(
+    e => {
+      if (!searchBarRef.current.contains(e.target)) {
+        searchBarRef.current.focus();
+      }
+
+      props.handleSearchBarToggle && props.handleSearchBarToggle(!props.isSearchBarExpanded);
+    },
+    [props.isSearchBarExpanded]
+  );
+
+  if (isBrowser) {
+    loadAlgolia();
+  }
+
+  return (
+    <div className="navbar__search" key="search-box">
+      <span
+        aria-label="expand searchbar"
+        role="button"
+        className={classnames("search-icon", {
+          "search-icon-hidden": props.isSearchBarExpanded
+        })}
+        onClick={toggleSearchIconClick}
+        onKeyDown={toggleSearchIconClick}
+        tabIndex={0}
+      />
+      <input
+        id="search_input_react"
+        type="search"
+        placeholder={indexReady ? 'Search' : 'Loading...'}
+        aria-label="Search"
+        className={classnames(
+          "navbar__search-input",
+          { "search-bar-expanded": props.isSearchBarExpanded },
+          { "search-bar": !props.isSearchBarExpanded }
+        )}
+        onClick={loadAlgolia}
+        onMouseOver={loadAlgolia}
+        onFocus={toggleSearchIconClick}
+        onBlur={toggleSearchIconClick}
+        ref={searchBarRef}
+        disabled={!indexReady}
+      />
+    </div>
+  );
+};
+
+export default Search;