feat: initial commit

src/hooks/use-questions.ts

@@ -0,0 +1,18 @@
+import { useQuery } from "@tanstack/react-query"
+import { supabase } from "@/lib/supabase"
+
+export function useQuestions(part: number, limit = 10) {
+  return useQuery({
+    queryKey: ["questions", part, limit],
+    queryFn: async () => {
+      const { data, error } = await supabase
+        .from("questions")
+        .select("*")
+        .eq("part", part)
+        .limit(limit)
+      if (error) throw error
+      return data
+    },
+    enabled: false, // Enabled during feature implementation
+  })
+}

src/hooks/use-vocab.ts

@@ -0,0 +1,16 @@
+import { useQuery } from "@tanstack/react-query"
+import { supabase } from "@/lib/supabase"
+
+export function useVocab(topic?: string) {
+  return useQuery({
+    queryKey: ["vocab", topic],
+    queryFn: async () => {
+      let query = supabase.from("vocab").select("*")
+      if (topic) query = query.eq("topic", topic.toLowerCase())
+      const { data, error } = await query
+      if (error) throw error
+      return data
+    },
+    enabled: false, // Enabled during feature implementation
+  })
+}

src/hooks/use-writing-check.ts

@@ -0,0 +1,28 @@
+import { useMutation } from "@tanstack/react-query"
+import { supabase } from "@/lib/supabase"
+import { canUseWritingCheck, recordWritingCheckUsage } from "@/utils/rate-limiter"
+
+interface WritingFeedback {
+  score: string
+  grammar: string[]
+  vocabulary: string[]
+  structure: string
+  improved_version: string
+  summary: string
+}
+
+export function useWritingCheck() {
+  return useMutation({
+    mutationFn: async (content: string): Promise<WritingFeedback> => {
+      if (!canUseWritingCheck()) {
+        throw new Error("Bạn đã dùng hết 3 lần kiểm tra hôm nay. Quay lại vào ngày mai!")
+      }
+      const { data, error } = await supabase.functions.invoke("writing-check", {
+        body: { content },
+      })
+      if (error) throw error
+      recordWritingCheckUsage()
+      return data as WritingFeedback
+    },
+  })
+}