Move everything under the login dir

src/login/lib/useDownloadTerms.ts

@@ -0,0 +1,49 @@
+import { useEffect } from "react";
+import { memoize } from "keycloakify/tools/memoize";
+import { fallbackLanguageTag } from "keycloakify/login/i18n/i18n";
+import { useConst } from "keycloakify/tools/useConst";
+import { useConstCallback } from "keycloakify/tools/useConstCallback";
+import { assert } from "tsafe/assert";
+import { Evt } from "evt";
+import { KcContext } from "../kcContext";
+
+export const evtTermMarkdown = Evt.create<string | undefined>(undefined);
+
+export type KcContextLike = {
+    pageId: KcContext["pageId"];
+    locale?: {
+        currentLanguageTag: string;
+    };
+};
+
+assert<KcContext extends KcContextLike ? true : false>();
+
+/** Allow to avoid bundling the terms and download it on demand*/
+export function useDownloadTerms(params: {
+    kcContext: KcContextLike;
+    downloadTermMarkdown: (params: { currentLanguageTag: string }) => Promise<string>;
+}) {
+    const { kcContext } = params;
+
+    const { downloadTermMarkdownMemoized } = (function useClosure() {
+        const { downloadTermMarkdown } = params;
+
+        const downloadTermMarkdownConst = useConstCallback(downloadTermMarkdown);
+
+        const downloadTermMarkdownMemoized = useConst(() =>
+            memoize((currentLanguageTag: string) => downloadTermMarkdownConst({ currentLanguageTag }))
+        );
+
+        return { downloadTermMarkdownMemoized };
+    })();
+
+    useEffect(() => {
+        if (kcContext.pageId !== "terms.ftl") {
+            return;
+        }
+
+        downloadTermMarkdownMemoized(kcContext.locale?.currentLanguageTag ?? fallbackLanguageTag).then(
+            thermMarkdown => (evtTermMarkdown.state = thermMarkdown)
+        );
+    }, []);
+}