Initial commit

hooks/use-mobile.ts

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+import * as React from "react"
+
+const MOBILE_BREAKPOINT = 768
+
+export function useIsMobile() {
+  const [isMobile, setIsMobile] = React.useState<boolean | undefined>(undefined)
+
+  React.useEffect(() => {
+    const mql = window.matchMedia(`(max-width: ${MOBILE_BREAKPOINT - 1}px)`)
+    const onChange = () => {
+      setIsMobile(window.innerWidth < MOBILE_BREAKPOINT)
+    }
+    mql.addEventListener("change", onChange)
+    setIsMobile(window.innerWidth < MOBILE_BREAKPOINT)
+    return () => mql.removeEventListener("change", onChange)
+  }, [])
+
+  return !!isMobile
+}

hooks/usePlaylist.ts

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+'use client';
+import { useEffect, useState } from 'react';
+
+type Playlist = any;
+
+export function usePlaylist(id?: string) {
+  const [playlist, setPlaylist] = useState<Playlist | null>(null);
+  const [isLoading, setIsLoading] = useState<boolean>(!!id);
+  const [error, setError] = useState<any>(null);
+
+  useEffect(() => {
+    if (!id) {
+      setPlaylist(null);
+      setIsLoading(false);
+      setError(null);
+      return;
+    }
+
+    let cancelled = false;
+    setIsLoading(true);
+    setError(null);
+
+    fetch(`/api/playlists/${id}`)
+      .then(async (res) => {
+        if (!res.ok) throw new Error(`HTTP ${res.status}`);
+        const json = await res.json();
+        if (!cancelled) setPlaylist(json.playlist ?? null);
+      })
+      .catch((err) => {
+        if (!cancelled) setError(err);
+      })
+      .finally(() => {
+        if (!cancelled) setIsLoading(false);
+      });
+
+    return () => {
+      cancelled = true;
+    };
+  }, [id]);
+
+  return { playlist, isLoading, error };
+}

hooks/usePlaylists.ts

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+'use client';
+import { useEffect, useState } from 'react';
+
+type Subject = any;
+
+export function usePlaylists() {
+  const [subjects, setSubjects] = useState<Subject[]>([]);
+  const [isLoading, setIsLoading] = useState(true);
+  const [error, setError] = useState<any>(null);
+
+  useEffect(() => {
+    let cancelled = false;
+    setIsLoading(true);
+    setError(null);
+
+    fetch('/api/playlists')
+      .then(async (res) => {
+        if (!res.ok) throw new Error(`HTTP ${res.status}`);
+        const json = await res.json();
+        if (!cancelled) {
+          setSubjects(json.subjects ?? []);
+        }
+      })
+      .catch((err) => {
+        if (!cancelled) setError(err);
+      })
+      .finally(() => {
+        if (!cancelled) setIsLoading(false);
+      });
+
+    return () => {
+      cancelled = true;
+    };
+  }, []);
+
+  return { subjects, isLoading, error };
+}

hooks/useVideo.ts

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+'use client';
+import { useEffect, useState } from 'react';
+
+type Video = any;
+
+export function useVideo(id?: string) {
+  const [video, setVideo] = useState<Video | null>(null);
+  const [next, setNext] = useState<Video | null>(null);
+  const [isLoading, setIsLoading] = useState<boolean>(!!id);
+  const [error, setError] = useState<any>(null);
+
+  useEffect(() => {
+    if (!id) {
+      setVideo(null);
+      setNext(null);
+      setIsLoading(false);
+      setError(null);
+      return;
+    }
+
+    let cancelled = false;
+    setIsLoading(true);
+    setError(null);
+
+    fetch(`/api/videos/${id}`)
+      .then(async (res) => {
+        if (!res.ok) throw new Error(`HTTP ${res.status}`);
+        const json = await res.json();
+        if (!cancelled) {
+          setVideo(json.video ?? null);
+          setNext(json.next ?? null);
+        }
+      })
+      .catch((err) => {
+        if (!cancelled) setError(err);
+      })
+      .finally(() => {
+        if (!cancelled) setIsLoading(false);
+      });
+
+    return () => {
+      cancelled = true;
+    };
+  }, [id]);
+
+  return { video, next, isLoading, error };
+}