Initial commit: StudyOS platform

client/src/hooks/useProgress.js

@@ -0,0 +1,74 @@
+import { useState, useCallback, useEffect } from 'react';
+import { getProgress, updateProgress, resetProgressTopic } from '../lib/api';
+
+function calcPercentage(row) {
+  if (!row || row.exercises_done === 0) return 0;
+  return Math.round((row.exercises_correct / row.exercises_done) * 100);
+}
+
+export default function useProgress() {
+  const [progress, setProgress] = useState([]);
+  const [error, setError] = useState(null);
+
+  const refresh = useCallback(async () => {
+    try {
+      const rows = await getProgress();
+      setProgress(
+        rows.map((r) => ({
+          ...r,
+          percentage: calcPercentage(r),
+        }))
+      );
+      setError(null);
+    } catch (err) {
+      console.error('[useProgress] refresh error:', err.message);
+      setError(err.message);
+    }
+  }, []);
+
+  useEffect(() => {
+    refresh();
+  }, [refresh]);
+
+  const updateExercise = useCallback(
+    async (topic, correct) => {
+      try {
+        const row = await updateProgress(topic, correct);
+        setProgress((prev) => {
+          const idx = prev.findIndex((p) => p.topic === topic);
+          const enriched = { ...row, percentage: calcPercentage(row) };
+          if (idx >= 0) {
+            const next = [...prev];
+            next[idx] = enriched;
+            return next;
+          }
+          return [...prev, enriched];
+        });
+        setError(null);
+      } catch (err) {
+        console.error('[useProgress] update error:', err.message);
+        setError(err.message);
+      }
+    },
+    []
+  );
+
+  const resetTopic = useCallback(async (topic) => {
+    try {
+      await resetProgressTopic(topic);
+      setProgress((prev) => prev.filter((p) => p.topic !== topic));
+      setError(null);
+    } catch (err) {
+      console.error('[useProgress] reset error:', err.message);
+      setError(err.message);
+    }
+  }, []);
+
+  return {
+    progress,
+    error,
+    refresh,
+    updateExercise,
+    resetTopic,
+  };
+}