add: ver()

Signed-off-by: Kenneth Obsequio <k80308392@gmail.com>

src/modules/admin/pages/library/units/ViewLibraryUnit.jsx

@@ -0,0 +1,237 @@
+import { useEffect, useState } from "react";
+import { useNavigate, useParams, Link } from "react-router-dom";
+import {
+  ArrowLeft, House, Plus, Link2, Unlink, Pencil,
+  ChevronUp, ChevronDown, Clock, ClipboardList, PlusCircle,
+  LayoutTemplate, BookOpen,
+} from "lucide-react";
+
+import { useLibrary } from "@/contexts/AdminLibraryContext";
+import { PageMeta } from "@/contexts/MetadataContext";
+import AppBreadcrumb from "@/components/generic/Breadcrumb/AppBreadcrumb";
+import AttachLessonsDialog from "../../../components/library/AttachLessonsDialog";
+import { Button } from "@/components/ui/button";
+import { Badge } from "@/components/ui/badge";
+import { Spinner } from "@/components/ui/spinner";
+import { formatDuration } from "@/utils/timestamp.util";
+
+export default function ViewLibraryUnit() {
+  const navigate = useNavigate();
+  const { unitId } = useParams();
+  const {
+    fetchUnit, unit, loading,
+    attachLessonsToUnit, detachLessonFromUnit, reorderUnitLessons,
+  } = useLibrary();
+
+  const [initializing, setInitializing] = useState(true);
+  const [attachOpen, setAttachOpen] = useState(false);
+
+  useEffect(() => {
+    (async () => {
+      await fetchUnit(unitId);
+      setInitializing(false);
+    })();
+  }, [unitId]);
+
+  const items = [
+    { label: "Home", icon: <House className="size-4" />, to: "/admin" },
+    { label: "Units", to: "/admin/units" },
+    { label: unit?.title ?? "..." },
+  ];
+
+  const lessons = unit?.lessons ?? [];
+  const courses = unit?.courses ?? [];
+
+  const moveLesson = async (index, direction) => {
+    const target = index + direction;
+    if (target < 0 || target >= lessons.length) return;
+    const reordered = [...lessons];
+    [reordered[index], reordered[target]] = [reordered[target], reordered[index]];
+    await reorderUnitLessons(unitId, reordered.map((l) => l.lesson_id));
+    fetchUnit(unitId);
+  };
+
+  const handleDetach = async (lessonId) => {
+    await detachLessonFromUnit(unitId, lessonId);
+    fetchUnit(unitId);
+  };
+
+  const handleAttach = async (lessonIds) => {
+    await attachLessonsToUnit(unitId, lessonIds);
+    fetchUnit(unitId);
+  };
+
+  if (initializing) {
+    return (
+      <div className="flex items-center justify-center h-64">
+        <Spinner className="h-6 w-6" />
+      </div>
+    );
+  }
+
+  return (
+    <section className="bg-muted h-full">
+      <PageMeta title={unit ? `${unit.title} - Units - STARR` : undefined} />
+      <div className="lg:container lg:mx-auto lg:px-0 flex flex-col items-start px-4">
+        <div className="flex flex-col gap-2 my-6">
+          <AppBreadcrumb items={items} />
+        </div>
+
+        <div className="w-full space-y-6 pb-10">
+
+          {/* ── Unit header ── */}
+          <div className="bg-card rounded-xl border p-6 space-y-4">
+            <div className="flex items-start justify-between gap-4">
+              <div>
+                <h6 className="text-xs tracking-widest mb-1">STANDALONE UNIT</h6>
+                <h1 className="text-xl font-semibold">{unit?.title}</h1>
+                {unit?.description && (
+                  <p className="text-sm text-muted-foreground mt-0.5">{unit.description}</p>
+                )}
+              </div>
+              <div className="flex gap-2 shrink-0">
+                <Button size="sm" variant="outline" onClick={() => navigate(`/admin/units/${unitId}/edit`)}>
+                  <Pencil className="h-3.5 w-3.5 mr-1.5" /> Edit
+                </Button>
+                {unit?.quiz ? (
+                  <Button size="sm" variant="outline" onClick={() => navigate(`/admin/units/${unitId}/quiz/view`)}>
+                    <ClipboardList className="h-3.5 w-3.5 mr-1.5" /> View Quiz
+                  </Button>
+                ) : (
+                  <Button size="sm" variant="outline" onClick={() => navigate(`/admin/units/${unitId}/quiz/edit`)}>
+                    <PlusCircle className="h-3.5 w-3.5 mr-1.5" /> Create Quiz
+                  </Button>
+                )}
+              </div>
+            </div>
+
+            {/* Stats row */}
+            <div className="grid grid-cols-2 lg:grid-cols-4 gap-3">
+              <div className="bg-muted/60 rounded-lg p-3 space-y-1">
+                <p className="text-xs text-muted-foreground uppercase tracking-wide font-medium">Lessons</p>
+                <p className="font-semibold text-sm">{lessons.length}</p>
+              </div>
+              <div className="bg-muted/60 rounded-lg p-3 space-y-1">
+                <p className="text-xs text-muted-foreground uppercase tracking-wide font-medium">Duration</p>
+                <p className="font-semibold text-sm">{formatDuration(unit?.duration_seconds ?? 0)}</p>
+              </div>
+              <div className="bg-muted/60 rounded-lg p-3 space-y-1">
+                <p className="text-xs text-muted-foreground uppercase tracking-wide font-medium">Quiz</p>
+                <p className="font-semibold text-sm">{unit?.quiz ? unit.quiz.title || "Unit Quiz" : "None"}</p>
+              </div>
+              <div className="bg-muted/60 rounded-lg p-3 space-y-1">
+                <p className="text-xs text-muted-foreground uppercase tracking-wide font-medium">Used In</p>
+                <p className="font-semibold text-sm">
+                  {courses.length > 0 ? `${courses.length} course${courses.length === 1 ? "" : "s"}` : "Standalone"}
+                </p>
+              </div>
+            </div>
+
+            {/* Attached courses */}
+            {courses.length > 0 && (
+              <div className="flex flex-wrap items-center gap-2 pt-1">
+                <span className="text-xs text-muted-foreground uppercase tracking-wide font-medium">Courses:</span>
+                {courses.map((c) => (
+                  <Link key={c.course_id} to={`/admin/courses/${c.course_id}/view`}>
+                    <Badge variant="secondary" className="hover:bg-muted cursor-pointer">
+                      <BookOpen className="h-3 w-3 mr-1" /> {c.title}
+                    </Badge>
+                  </Link>
+                ))}
+              </div>
+            )}
+          </div>
+
+          {/* ── Lessons manager ── */}
+          <div className="bg-card rounded-xl border">
+            <div className="flex items-center justify-between p-4 border-b">
+              <div>
+                <h2 className="font-semibold">Lessons</h2>
+                <p className="text-xs text-muted-foreground">
+                  Lessons are standalone too — attach existing ones or create new. Order here is this unit's order.
+                </p>
+              </div>
+              <div className="flex gap-2">
+                <Button size="sm" variant="outline" onClick={() => setAttachOpen(true)}>
+                  <Link2 className="h-3.5 w-3.5 mr-1.5" /> Attach Existing
+                </Button>
+                <Button size="sm" onClick={() => navigate(`/admin/lessons/add?unit_id=${unitId}`)}>
+                  <Plus className="h-3.5 w-3.5 mr-1.5" /> New Lesson
+                </Button>
+              </div>
+            </div>
+
+            {lessons.length === 0 ? (
+              <p className="text-sm text-muted-foreground text-center py-10">
+                No lessons attached yet — attach one from the library or create a new one.
+              </p>
+            ) : (
+              <div className="divide-y">
+                {lessons.map((l, i) => (
+                  <div key={l.lesson_id} className="flex items-center gap-3 px-4 py-3">
+                    <span className="text-xs font-mono text-muted-foreground w-6 text-right shrink-0">
+                      {i + 1}.
+                    </span>
+                    <div className="flex flex-col gap-0.5 shrink-0">
+                      <button
+                        type="button"
+                        className="text-muted-foreground hover:text-foreground disabled:opacity-30"
+                        disabled={i === 0 || loading}
+                        onClick={() => moveLesson(i, -1)}
+                        aria-label="Move up"
+                      >
+                        <ChevronUp className="h-3.5 w-3.5" />
+                      </button>
+                      <button
+                        type="button"
+                        className="text-muted-foreground hover:text-foreground disabled:opacity-30"
+                        disabled={i === lessons.length - 1 || loading}
+                        onClick={() => moveLesson(i, 1)}
+                        aria-label="Move down"
+                      >
+                        <ChevronDown className="h-3.5 w-3.5" />
+                      </button>
+                    </div>
+                    <div className="flex-1 min-w-0">
+                      <p className="text-sm font-medium truncate">{l.title}</p>
+                      {l.description && (
+                        <p className="text-xs text-muted-foreground truncate">{l.description}</p>
+                      )}
+                    </div>
+                    <Badge variant="secondary" className="text-xs shrink-0 tabular-nums">
+                      <Clock className="h-3 w-3 mr-1" /> {formatDuration(l.duration_seconds ?? 0)}
+                    </Badge>
+                    <Button
+                      size="sm" variant="ghost"
+                      onClick={() => navigate(`/admin/lessons/${l.lesson_id}/page`)}
+                      title="Page Builder"
+                    >
+                      <LayoutTemplate className="h-3.5 w-3.5" />
+                    </Button>
+                    <Button
+                      size="sm" variant="ghost"
+                      className="text-destructive hover:text-destructive"
+                      onClick={() => handleDetach(l.lesson_id)}
+                      disabled={loading}
+                      title="Detach from unit (lesson stays in library)"
+                    >
+                      <Unlink className="h-3.5 w-3.5" />
+                    </Button>
+                  </div>
+                ))}
+              </div>
+            )}
+          </div>
+        </div>
+      </div>
+
+      <AttachLessonsDialog
+        open={attachOpen}
+        onOpenChange={setAttachOpen}
+        attachedLessonIds={lessons.map((l) => l.lesson_id)}
+        onAttach={handleAttach}
+        loading={loading}
+      />
+    </section>
+  );
+}