chore: initialize project

src/hooks/demo.useChat.ts

@@ -0,0 +1,62 @@
+import { useEffect, useRef } from 'react'
+import { useLiveQuery } from '@tanstack/react-db'
+
+import { messagesCollection, type Message } from '#/db-collections'
+
+import type { Collection } from '@tanstack/react-db'
+
+function useStreamConnection(
+  url: string,
+  collection: Collection<any, any, any>,
+) {
+  const loadedRef = useRef(false)
+
+  useEffect(() => {
+    const fetchData = async () => {
+      if (loadedRef.current) return
+      loadedRef.current = true
+
+      const response = await fetch(url)
+      const reader = response.body?.getReader()
+      if (!reader) {
+        return
+      }
+
+      const decoder = new TextDecoder()
+      while (true) {
+        const { done, value } = await reader.read()
+        if (done) break
+        for (const chunk of decoder
+          .decode(value, { stream: true })
+          .split('\n')
+          .filter((chunk) => chunk.length > 0)) {
+          collection.insert(JSON.parse(chunk))
+        }
+      }
+    }
+    fetchData()
+  }, [])
+}
+
+export function useChat() {
+  useStreamConnection('/demo/db-chat-api', messagesCollection)
+
+  const sendMessage = (message: string, user: string) => {
+    fetch('/demo/db-chat-api', {
+      method: 'POST',
+      body: JSON.stringify({ text: message.trim(), user: user.trim() }),
+    })
+  }
+
+  return { sendMessage }
+}
+
+export function useMessages() {
+  const { data: messages } = useLiveQuery((q) =>
+    q.from({ message: messagesCollection }).select(({ message }) => ({
+      ...message,
+    })),
+  )
+
+  return messages as Message[]
+}