add @ suggestion popup

src/app/new/components/index.ts

@@ -2,3 +2,4 @@ export * from './articleCoverUploader';
 export * from './mediaUploader';
 export * from './mentionPopup';
 export * from './mentionPopupItem';
+export * from './mentionList';

src/app/new/components/mentionList.tsx

@@ -0,0 +1,104 @@
+import * as Avatar from '@radix-ui/react-avatar';
+import { minidenticon } from 'minidenticons';
+import { Ref, forwardRef, useEffect, useImperativeHandle, useState } from 'react';
+import { twMerge } from 'tailwind-merge';
+
+import { NDKCacheUserProfile } from '@utils/types';
+
+type MentionListRef = {
+  onKeyDown: (props: { event: Event }) => boolean;
+};
+
+const List = (
+  props: {
+    items: NDKCacheUserProfile[];
+    command: (arg0: { id: string }) => void;
+  },
+  ref: Ref<unknown>
+) => {
+  const [selectedIndex, setSelectedIndex] = useState(0);
+
+  const selectItem = (index) => {
+    const item = props.items[index];
+    if (item) {
+      props.command({ id: item.pubkey });
+    }
+  };
+
+  const upHandler = () => {
+    setSelectedIndex((selectedIndex + props.items.length - 1) % props.items.length);
+  };
+
+  const downHandler = () => {
+    setSelectedIndex((selectedIndex + 1) % props.items.length);
+  };
+
+  const enterHandler = () => {
+    selectItem(selectedIndex);
+  };
+
+  useEffect(() => setSelectedIndex(0), [props.items]);
+
+  useImperativeHandle(ref, () => ({
+    onKeyDown: ({ event }) => {
+      if (event.key === 'ArrowUp') {
+        upHandler();
+        return true;
+      }
+
+      if (event.key === 'ArrowDown') {
+        downHandler();
+        return true;
+      }
+
+      if (event.key === 'Enter') {
+        enterHandler();
+        return true;
+      }
+
+      return false;
+    },
+  }));
+
+  return (
+    <div className="flex w-[200px] flex-col overflow-y-auto rounded-lg border border-neutral-200 bg-neutral-50 p-2 shadow-lg shadow-neutral-500/20 dark:border-neutral-800 dark:bg-neutral-950 dark:shadow-neutral-300/50">
+      {props.items.length ? (
+        props.items.map((item, index) => (
+          <button
+            key={index}
+            onClick={() => selectItem(index)}
+            className={twMerge(
+              'inline-flex h-11 items-center gap-2 rounded-md px-2',
+              index === selectedIndex ? 'bg-neutral-100 dark:bg-neutral-900' : ''
+            )}
+          >
+            <Avatar.Root className="h-8 w-8 shrink-0">
+              <Avatar.Image
+                src={item.image}
+                alt={item.name}
+                loading="lazy"
+                decoding="async"
+                className="h-8 w-8 rounded-md"
+              />
+              <Avatar.Fallback delayMs={150}>
+                <img
+                  src={
+                    'data:image/svg+xml;utf8,' +
+                    encodeURIComponent(minidenticon(item.name, 90, 50))
+                  }
+                  alt={item.name}
+                  className="h-8 w-8 rounded-md bg-black dark:bg-white"
+                />
+              </Avatar.Fallback>
+            </Avatar.Root>
+            <h5 className="max-w-[150px] truncate text-sm font-medium">{item.name}</h5>
+          </button>
+        ))
+      ) : (
+        <div className="text-center text-sm font-medium">No result</div>
+      )}
+    </div>
+  );
+};
+
+export const MentionList = forwardRef<MentionListRef>(List);