Freezmo: self-hosted notes-to-activities study app
Next.js 15 app that turns photos, PDFs, DOCX/PPTX and text into a swipeable feed of AI-generated activities (flashcards, multiple choice, true/false, fill-in-the-blank, matching, ordering, short answer) using the user's own Ollama models. Highlights: - All AI calls run in server route handlers; the browser never talks to Ollama. - Bring-your-own-key mode (default): the key lives only in the browser and is sent per-request; server, local-daemon and shared-key modes also supported. - Client-side document extraction (pdf.js, mammoth, jszip) with scanned-PDF page rendering for the vision model; notes stay in their original language. - ChatGPT-style shell: collapsible sidebar / mobile drawer, neutral token-based light + dark themes, folder organisation, PWA (manifest, SW, offline page). - Strict JSON validation with zod + auto-repair, rate limiting, and request guards (cross-origin, body-size, API-key sanitising). - setup.sh bootstraps deps, .env.local and a production build. Gitignore excludes .env*, the generated pdf.js worker and local scratch files.
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components/activities/ShortAnswer.tsx
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189
components/activities/ShortAnswer.tsx
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"use client";
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import { useEffect, useRef, useState } from "react";
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import { ApiError, gradeAnswer } from "@/lib/client-api";
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import type { Activity } from "@/lib/schemas";
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import { cn } from "@/lib/utils";
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import { Button, Spinner } from "@/components/ui";
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import {
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ActivityHeader,
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FeedbackPanel,
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Hint,
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PromptCard,
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QuestionText,
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type ActivityComponentProps,
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} from "./shared";
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type ShortAnswerActivity = Extract<Activity, { type: "short_answer" }>;
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type GradeState =
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| { status: "idle" }
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| { status: "grading" }
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| { status: "graded"; correct: boolean; feedback: string; missing: string[] }
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| { status: "error"; message: string }
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| { status: "self-check" };
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export function ShortAnswer({ activity, active, language, onAnswered, onNext, isLast }: ActivityComponentProps<ShortAnswerActivity>) {
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const [value, setValue] = useState("");
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const [state, setState] = useState<GradeState>({ status: "idle" });
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const textareaRef = useRef<HTMLTextAreaElement>(null);
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useEffect(() => {
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if (active && state.status === "idle") {
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const timer = window.setTimeout(() => textareaRef.current?.focus(), 350);
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return () => window.clearTimeout(timer);
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}
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}, [active, state.status]);
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const grade = async () => {
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if (!value.trim() || state.status === "grading") return;
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setState({ status: "grading" });
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try {
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const result = await gradeAnswer({
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question: activity.question,
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referenceAnswer: activity.referenceAnswer,
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keyPoints: activity.keyPoints,
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userAnswer: value.trim(),
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language,
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});
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setState({
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status: "graded",
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correct: result.correct,
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feedback: result.feedback,
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missing: result.missing,
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});
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onAnswered(result.correct, { userAnswer: value.trim() });
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} catch (error) {
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setState({
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status: "error",
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message:
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error instanceof ApiError
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? error.message
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: "Grading failed. Check that Ollama is reachable and try again.",
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});
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}
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};
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const selfCheck = (correct: boolean) => {
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setState({ status: "graded", correct, feedback: "Self-checked — you judged this one yourself.", missing: [] });
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onAnswered(correct, { userAnswer: value.trim() });
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};
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return (
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<>
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<ActivityHeader type="short_answer" topic={activity.topic} />
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<PromptCard>
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<QuestionText>{activity.question}</QuestionText>
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</PromptCard>
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<label className="sr-only" htmlFor={`answer-${activity.id}`}>
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Your answer
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</label>
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<textarea
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id={`answer-${activity.id}`}
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ref={textareaRef}
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value={value}
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onChange={(event) => setValue(event.target.value)}
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onKeyDown={(event) => {
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event.stopPropagation();
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if (event.key === "Enter" && (event.metaKey || event.ctrlKey)) {
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event.preventDefault();
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void grade();
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}
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}}
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disabled={state.status === "grading" || state.status === "graded"}
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rows={3}
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placeholder="Type your answer in your own words…"
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className="w-full resize-none rounded-2xl border-2 border-frost-200 bg-white/90 px-4 py-3 text-[15px] font-medium text-frost-950 shadow-sm outline-none transition placeholder:text-slate-400 focus:border-frost-500 disabled:opacity-70 dark:border-white/12 dark:bg-white/[0.07] dark:text-frost-50 dark:placeholder:text-slate-400"
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/>
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{state.status === "idle" ? (
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<div className="flex items-center justify-between gap-3">
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<Hint>Ctrl/⌘ + Enter to submit.</Hint>
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<Button size="lg" onClick={() => void grade()} disabled={!value.trim()}>
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Submit answer
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</Button>
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</div>
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) : null}
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{state.status === "grading" ? (
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<div className="flex items-center gap-3 rounded-2xl border border-white/60 bg-white/50 backdrop-blur-xl px-4 py-3 text-sm font-semibold text-frost-800 dark:border-white/15 dark:bg-white/10 dark:text-frost-100">
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<Spinner className="size-5" />
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Grading your answer…
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</div>
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) : null}
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{state.status === "error" ? (
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<div className="rounded-2xl border-2 border-amber-300 bg-amber-50 p-4 text-sm text-amber-900 dark:border-amber-400/40 dark:bg-amber-400/10 dark:text-amber-100">
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<p className="font-bold">Couldn't grade that answer</p>
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<p className="mt-1">{state.message}</p>
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<div className="mt-3 flex flex-wrap gap-2">
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<Button size="sm" onClick={() => void grade()}>
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Retry
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</Button>
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<Button size="sm" variant="secondary" onClick={() => setState({ status: "self-check" })}>
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Show answer & self-check
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</Button>
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</div>
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</div>
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) : null}
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{state.status === "self-check" ? (
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<div className="card space-y-3 p-4">
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<p className="text-sm font-bold text-frost-900 dark:text-frost-100">Model answer</p>
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<p className="text-sm leading-relaxed text-frost-700 dark:text-frost-200">{activity.referenceAnswer}</p>
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<p className="text-xs text-frost-500 dark:text-frost-400">Key points: {activity.keyPoints.join(" · ")}</p>
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<div className="grid grid-cols-2 gap-3">
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<Button variant="secondary" onClick={() => selfCheck(false)}>
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😅 I missed it
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</Button>
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<Button variant="success" onClick={() => selfCheck(true)}>
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🧊 I had it right
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</Button>
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</div>
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</div>
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) : null}
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{state.status === "graded" ? (
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<>
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<div
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className={cn(
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"rounded-2xl border-2 p-3 text-sm font-semibold",
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state.correct
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? "border-emerald-300 bg-emerald-50 text-emerald-900 dark:border-emerald-400/40 dark:bg-emerald-400/10 dark:text-emerald-100"
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: "border-rose-300 bg-rose-50 text-rose-900 dark:border-rose-400/40 dark:bg-rose-400/10 dark:text-rose-100",
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)}
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>
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<p className="font-extrabold uppercase tracking-wide">
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{state.correct ? "Accepted" : "Needs work"}
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</p>
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<p className="mt-1 font-normal">{state.feedback}</p>
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{state.missing.length ? (
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<ul className="mt-2 list-inside list-disc font-normal">
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{state.missing.map((item) => (
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<li key={item}>{item}</li>
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))}
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</ul>
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) : null}
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{!state.correct ? (
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<p className="mt-2 font-normal">
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<span className="font-bold">Model answer: </span>
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{activity.referenceAnswer}
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</p>
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) : null}
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</div>
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<FeedbackPanel
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correct={state.correct}
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explanation={activity.explanation}
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xp={activity.xp}
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isLast={isLast}
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onNext={onNext}
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/>
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</>
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) : null}
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</>
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);
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}
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