thực hiện phân quyền admin giáo viên và học sinh xong

2026-08-05 15:23:11 +07:00 · 2026-04-01 19:26:47 +07:00
parent 8546d41a26
commit 386871bd4a
14 changed files with 796 additions and 37 deletions
@@ -142,6 +142,8 @@ export default function WorkbookViewer({ pdfId }: Props) {
  const currentPageRef = useRef(1);  // mutable copy for collab callbacks
  const skipRemoteRef = useRef(false); // prevent echo-back when applying remote events
  const currentUserIdRef = useRef<number | null>(null); // populated from api.me(); used to identify own vs remote objects
+  const [userRole, setUserRole] = useState<"admin" | "teacher" | "student">("student");
+  const userRoleRef = useRef<"admin" | "teacher" | "student">("student");
  // Buffer for remote events that arrive while renderPageWithAnnotations is in progress
  const renderingRef = useRef(false);
  const pendingRemoteEvents = useRef<RemoteEvent[]>([]);
@@ -225,6 +227,8 @@ export default function WorkbookViewer({ pdfId }: Props) {
  useEffect(() => {
    api.me().then((u) => {
      currentUserIdRef.current = u.id;
+      setUserRole(u.role);
+      userRoleRef.current = u.role;
      // Assign deterministic color from preset palette based on user id
      const assigned = userIdToPresetColor(u.id);
      setPenColor(assigned);
@@ -299,11 +303,12 @@ export default function WorkbookViewer({ pdfId }: Props) {
      skipRemoteRef.current = true;
      skipObjectTracking.current = true;
      fabric.util.enlivenObjects([objJson], (objects: any[]) => {
+        const canInteract = userRoleRef.current !== "student";
        objects.forEach((obj: any) => {
          obj.collab_id = objJson.collab_id;
          obj._isRemote = true;  // don't save other users' live strokes under our account
-          obj.selectable = false;
-          obj.evented = false;
+          obj.selectable = canInteract;
+          obj.evented = canInteract;
          fc.add(obj);
        });
        fc.renderAll();
@@ -481,12 +486,13 @@ export default function WorkbookViewer({ pdfId }: Props) {
              // Mark objects from other users as remote — prevents saving them under current user
              const uid = currentUserIdRef.current;
              if (uid !== null) {
+                const canInteract = userRoleRef.current !== "student";
                // eslint-disable-next-line @typescript-eslint/no-explicit-any
                fc.getObjects().forEach((obj: any) => {
                  if (obj._owner_id != null && obj._owner_id !== uid) {
                    obj._isRemote = true;
-                    obj.selectable = false;
-                    obj.evented = false;
+                    obj.selectable = canInteract;
+                    obj.evented = canInteract;
                  }
                });
              }
@@ -512,11 +518,12 @@ export default function WorkbookViewer({ pdfId }: Props) {
            skipRemoteRef.current = true;
            skipObjectTracking.current = true;
            fabric.util.enlivenObjects([objJson], (objects: any[]) => {
+              const canInteract = userRoleRef.current !== "student";
              objects.forEach((obj: any) => {
                obj.collab_id = objJson.collab_id;
                obj._isRemote = true;
-                obj.selectable = false;
-                obj.evented = false;
+                obj.selectable = canInteract;
+                obj.evented = canInteract;
                fc.add(obj);
              });
              fc.renderAll();
@@ -618,12 +625,13 @@ export default function WorkbookViewer({ pdfId }: Props) {
            // Mark objects from other users as remote
            const uid = currentUserIdRef.current;
            if (uid !== null) {
+              const canInteract = userRoleRef.current !== "student";
              // eslint-disable-next-line @typescript-eslint/no-explicit-any
              fc.getObjects().forEach((obj: any) => {
                if (obj._owner_id != null && obj._owner_id !== uid) {
                  obj._isRemote = true;
-                  obj.selectable = false;
-                  obj.evented = false;
+                  obj.selectable = canInteract;
+                  obj.evented = canInteract;
                }
              });
            }
@@ -899,9 +907,15 @@ export default function WorkbookViewer({ pdfId }: Props) {
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        fc.on("mouse:down", (options: any) => {
          if (!options.target) return;
-          const collab_id = options.target.collab_id as string | undefined;
-          fc.remove(options.target);
-          addedObjects.current = addedObjects.current.filter(o => o !== options.target);
+          const obj = options.target as any;
+          const ownerId: number | undefined = obj._owner_id;
+          const uid = currentUserIdRef.current;
+          const role = userRoleRef.current;
+          // Students can only erase their own annotations
+          if (role === "student" && (obj._isRemote || (ownerId != null && ownerId !== uid))) return;
+          const collab_id = obj.collab_id as string | undefined;
+          fc.remove(obj);
+          addedObjects.current = addedObjects.current.filter(o => o !== obj);
          fc.renderAll();
          if (collab_id) collabSendRef.current?.objectRemove(collab_id, currentPageRef.current);
        });
@@ -947,8 +961,14 @@ export default function WorkbookViewer({ pdfId }: Props) {
          fc.isDrawingMode = false; fc.selection = false;
          fc.on("mouse:down", (options: any) => {
            if (!options.target) return;
-            const collab_id = options.target.collab_id as string | undefined;
-            fc.remove(options.target); fc.renderAll();
+            const obj = options.target as any;
+            const ownerId: number | undefined = obj._owner_id;
+            const uid = currentUserIdRef.current;
+            const role = userRoleRef.current;
+            // Students can only erase their own annotations
+            if (role === "student" && (obj._isRemote || (ownerId != null && ownerId !== uid))) return;
+            const collab_id = obj.collab_id as string | undefined;
+            fc.remove(obj); fc.renderAll();
            if (collab_id) collabSendRef.current?.objectRemove(collab_id, currentPageRef.current);
          }); break;
      }
@@ -1031,13 +1051,33 @@ export default function WorkbookViewer({ pdfId }: Props) {
  const handleClear = useCallback(() => {
    const fc = fabricRef.current;
    if (!fc) return;
-    if (!confirm("Clear all annotations on this page?")) return;
-    fc.clear();
-    addedObjects.current = [];
-    fc.renderAll();
-    collabSendRef.current?.clear(currentPageRef.current);
-    // Push empty canvas to Redis so other users see the clear immediately on next load
-    syncTempCanvasRef.current(currentPageRef.current);
+
+    const role = userRoleRef.current;
+    const uid = currentUserIdRef.current;
+
+    if (role === "student") {
+      // Students: only remove their own objects, leave others untouched
+      if (!confirm("Xoá annotation của bạn trên trang này?")) return;
+      const toRemove = fc.getObjects().filter((o: any) => !o._isRemote && (o._owner_id == null || o._owner_id === uid));
+      toRemove.forEach((o: any) => {
+        fc.remove(o);
+        // Broadcast removal so teacher canvas updates in real time
+        const collab_id = o.collab_id as string | undefined;
+        if (collab_id) collabSendRef.current?.objectRemove(collab_id, currentPageRef.current);
+      });
+      addedObjects.current = addedObjects.current.filter(o => toRemove.indexOf(o) === -1);
+      fc.renderAll();
+      // Sync own cleared state to Redis
+      syncTempCanvasRef.current(currentPageRef.current);
+    } else {
+      // Teacher / Admin: clear everything
+      if (!confirm("Xoá tất cả annotation trên trang này?")) return;
+      fc.clear();
+      addedObjects.current = [];
+      fc.renderAll();
+      collabSendRef.current?.clear(currentPageRef.current);
+      syncTempCanvasRef.current(currentPageRef.current);
+    }
  }, []);

  // ─────────────────────────────────────────────────────────────────────────
@@ -1317,16 +1357,50 @@ export default function WorkbookViewer({ pdfId }: Props) {
              <span className={`w-1.5 h-1.5 rounded-full flex-shrink-0 ${collabConnected ? "bg-green-500" : "bg-gray-300"}`} />
              {collabUsers.length > 0 && (
                <div className="flex -space-x-1">
-                  {collabUsers.slice(0, 5).map(u => (
-                    <span
-                      key={u.user_id}
-                      title={u.username}
-                      style={{ background: u.color }}
-                      className="w-5 h-5 rounded-full border-2 border-white flex items-center justify-center text-[9px] text-white font-bold uppercase"
-                    >
-                      {u.username[0]}
-                    </span>
-                  ))}
+                  {collabUsers.slice(0, 5).map(u => {
+                    const isSelf = u.user_id === currentUserIdRef.current;
+                    const canClear = !isSelf && (userRole === "admin" || userRole === "teacher");
+                    return (
+                      <div key={u.user_id} className="relative group">
+                        <span
+                          title={u.username}
+                          style={{ background: u.color }}
+                          className="w-5 h-5 rounded-full border-2 border-white flex items-center justify-center text-[9px] text-white font-bold uppercase select-none"
+                        >
+                          {u.username[0]}
+                        </span>
+                        {canClear && (
+                          <button
+                            onClick={async () => {
+                              if (!confirm(`Xoá annotation của "${u.username}" trên trang ${currentPageRef.current}?`)) return;
+                              try {
+                                await api.clearUserAnnotation(pdfId, currentPageRef.current, u.user_id);
+                                // Remove their objects from canvas
+                                const removeFromCanvas = (fc: any) => {
+                                  const toRemove = fc.getObjects().filter((o: any) => o._owner_id === u.user_id);
+                                  toRemove.forEach((o: any) => fc.remove(o));
+                                  if (toRemove.length) fc.renderAll();
+                                };
+                                if (scrollModeRef.current === "continuous") {
+                                  pageFabricRefs.current.forEach(fc => { if (fc) removeFromCanvas(fc); });
+                                } else if (fabricRef.current) {
+                                  removeFromCanvas(fabricRef.current);
+                                }
+                                localAnnotations.current = {};
+                              } catch (e: unknown) {
+                                alert(e instanceof Error ? e.message : "Xoá thất bại.");
+                              }
+                            }}
+                            title={`Xoá annotation của ${u.username} trang này`}
+                            className="absolute -top-1.5 -right-1.5 w-3.5 h-3.5 rounded-full bg-red-500 text-white hidden group-hover:flex items-center justify-center shadow z-10"
+                            style={{ fontSize: 8 }}
+                          >
+                            ✕
+                          </button>
+                        )}
+                      </div>
+                    );
+                  })}
                  {collabUsers.length > 5 && (
                    <span className="w-5 h-5 rounded-full border-2 border-white bg-gray-400 flex items-center justify-center text-[9px] text-white font-bold">
                      +{collabUsers.length - 5}