439 lines
16 KiB
TypeScript
439 lines
16 KiB
TypeScript
import React, { useRef, useState, useEffect } from "react";
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import { ArrowDown, Check, BookOpen, AlertTriangle, Zap } from "lucide-react";
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import { PracticeFromDataset } from "../../../components/lessons/LessonShell";
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import {
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FORM_STRUCTURE_EASY,
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FORM_STRUCTURE_MEDIUM,
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} from "../../../data/rw/form-structure-sense";
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import ClauseBreakdownWidget, {
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type ClauseExample,
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} from "../../../components/lessons/ClauseBreakdownWidget";
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import DecisionTreeWidget, {
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type TreeScenario,
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type TreeNode,
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} from "../../../components/lessons/DecisionTreeWidget";
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interface LessonProps {
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onFinish?: () => void;
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}
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// ── Clause Breakdown data ──────────────────────────────────────────────────
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const CLAUSE_EXAMPLES: ClauseExample[] = [
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{
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title: "Parallel Structure — List",
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segments: [
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{
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text: "The program requires",
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type: "subject",
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label: "Subject + Verb",
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},
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{ text: " attending lectures", type: "conjunction", label: "Gerund: ✓" },
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{ text: ",", type: "punct" },
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{
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text: " completing assignments",
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type: "conjunction",
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label: "Gerund: ✓",
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},
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{ text: ",", type: "punct" },
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{ text: " and", type: "conjunction", label: "FANBOYS" },
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{
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text: " passing the final exam",
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type: "conjunction",
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label: "Gerund: ✓ — all match",
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},
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{ text: ".", type: "punct" },
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],
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},
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{
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title: "Misplaced Modifier",
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segments: [
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{
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text: "Running through the park",
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type: "modifier",
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label: "Modifier: describes who is running",
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},
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{ text: ",", type: "punct" },
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{
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text: " the sunset",
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type: "subject",
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label: "⚠ 'The sunset' can't run — modifier is misplaced!",
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},
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{ text: " was beautiful", type: "verb", label: "" },
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{ text: ".", type: "punct" },
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],
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},
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{
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title: "Dangling Modifier — Fixed",
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segments: [
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{
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text: "Running through the park",
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type: "modifier",
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label: "Modifier: describes who is running",
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},
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{ text: ",", type: "punct" },
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{
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text: " she",
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type: "subject",
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label: "✓ 'She' is the one running — modifier now matches",
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},
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{ text: " watched the sunset", type: "verb", label: "" },
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{ text: ".", type: "punct" },
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],
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},
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];
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// ── Decision Tree data ─────────────────────────────────────────────────────
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const STRUCTURE_TREE: TreeNode = {
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id: "root",
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question: "Is this a PARALLELISM or MODIFIER problem?",
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hint: "Parallelism: a list where elements don't match in form. Modifier: a descriptive phrase that's attached to the wrong noun.",
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yesLabel: "Parallelism — list items don't match",
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noLabel: "Modifier — descriptive phrase in wrong place",
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yes: {
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id: "parallelism",
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question: "What grammatical form do MOST items in the list use?",
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hint: "Identify the form of the majority: nouns? gerunds (-ing)? infinitives (to-)? adjectives?",
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yesLabel: "Gerunds (-ing forms) dominate",
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noLabel: "Nouns, infinitives, or adjectives dominate",
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yes: {
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id: "parallel-gerunds",
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result:
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"✓ Convert ALL list items to gerunds (-ing). 'The program requires attending, completing, and passing' — all match.",
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resultType: "correct",
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ruleRef: "[verb]-ing, [verb]-ing, and [verb]-ing",
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},
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no: {
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id: "parallel-other",
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question: "Are the items a mix of infinitives (to-verb) and other forms?",
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yesLabel: "Yes — some 'to-verb', some don't match",
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noLabel: "No — nouns or adjectives are mixed",
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yes: {
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id: "parallel-infinitives",
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result:
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"✓ Convert ALL list items to infinitives (to + verb): 'to attend, to complete, and to pass.'",
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resultType: "correct",
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ruleRef: "to [verb], to [verb], and to [verb]",
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},
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no: {
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id: "parallel-nouns",
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result:
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"✓ Make all items the same part of speech — all nouns, all adjectives, or all the same structure. The parallelism rule: match the form of the first item.",
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resultType: "correct",
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ruleRef: "[noun], [noun], and [noun] — all same form",
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},
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},
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},
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no: {
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id: "modifier",
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question:
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"Is the modifier at the BEGINNING of the sentence (before the comma)?",
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hint: "Opening modifiers like 'Running through the park,' must be immediately followed by the noun/pronoun they describe.",
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yesLabel: "Yes — opens the sentence before a comma",
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noLabel: "No — modifier is elsewhere in the sentence",
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yes: {
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id: "opening-modifier",
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question:
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"Does the word immediately AFTER the comma refer to who/what is doing the action in the modifier?",
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yesLabel: "Yes — it matches",
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noLabel: "No — it doesn't make sense (dangling modifier)",
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yes: {
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id: "modifier-correct",
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result:
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"✓ The modifier is correctly placed. It immediately precedes the noun it describes.",
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resultType: "correct",
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ruleRef: "[Modifier phrase], [the noun it describes] [verb]...",
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},
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no: {
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id: "dangling-modifier",
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result:
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"⚠ Dangling modifier! The noun after the comma must be the one performing the action in the phrase. Fix: rewrite so the correct subject follows the comma.",
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resultType: "warning",
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ruleRef: "Fix: '[Modifier], [WHO is doing it] [verb]'",
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},
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},
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no: {
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id: "mid-sentence-modifier",
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result:
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"⚠ Misplaced modifier! The modifier should be placed immediately next to what it describes. Move it closer to the word it modifies.",
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resultType: "warning",
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ruleRef: "Place modifier directly next to the word it describes",
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},
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},
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};
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const TREE_SCENARIOS: TreeScenario[] = [
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{
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label: "Sentence 1",
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sentence:
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"The program requires attending lectures, to complete assignments, and passing the final.",
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tree: STRUCTURE_TREE,
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},
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{
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label: "Sentence 2",
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sentence:
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"Having reviewed all the evidence, a verdict was reached by the jury.",
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tree: STRUCTURE_TREE,
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},
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{
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label: "Sentence 3",
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sentence: "She enjoys hiking, to read, and cooking on weekends.",
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tree: STRUCTURE_TREE,
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},
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];
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// ── Lesson component ───────────────────────────────────────────────────────
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const EBRWSentenceStructureLesson: React.FC<LessonProps> = ({ onFinish }) => {
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const [activeSection, setActiveSection] = useState(0);
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const sectionsRef = useRef<(HTMLElement | null)[]>([]);
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useEffect(() => {
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const observers: IntersectionObserver[] = [];
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sectionsRef.current.forEach((el, idx) => {
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if (!el) return;
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const obs = new IntersectionObserver(
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([entry]) => {
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if (entry.isIntersecting) setActiveSection(idx);
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},
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{ threshold: 0.3 },
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);
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obs.observe(el);
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observers.push(obs);
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});
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return () => observers.forEach((o) => o.disconnect());
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}, []);
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const scrollToSection = (index: number) => {
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setActiveSection(index);
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sectionsRef.current[index]?.scrollIntoView({ behavior: "smooth" });
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};
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const SectionMarker = ({
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index,
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title,
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icon: Icon,
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}: {
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index: number;
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title: string;
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icon: React.ElementType;
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}) => {
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const isActive = activeSection === index;
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const isPast = activeSection > index;
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return (
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<button
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onClick={() => scrollToSection(index)}
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className={`flex items-center gap-3 p-3 w-full rounded-lg text-left transition-all ${isActive ? "bg-purple-50" : "hover:bg-slate-50"}`}
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>
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<div
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className={`w-8 h-8 rounded-full flex items-center justify-center shrink-0
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${isActive ? "bg-purple-600 text-white" : isPast ? "bg-purple-400 text-white" : "bg-slate-200 text-slate-500"}`}
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>
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{isPast ? (
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<Check className="w-4 h-4" />
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) : (
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<Icon className="w-4 h-4" />
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)}
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</div>
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<p
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className={`text-sm font-bold ${isActive ? "text-purple-900" : "text-slate-600"}`}
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>
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{title}
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</p>
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</button>
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);
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};
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return (
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<div className="flex flex-col lg:flex-row min-h-screen">
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<aside className="w-full lg:w-64 lg:fixed lg:top-14 lg:bottom-0 lg:overflow-y-auto p-4 border-r border-slate-200 bg-slate-50 z-0 hidden lg:block">
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<nav className="space-y-2 pt-6">
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<SectionMarker index={0} title="Structure Anatomy" icon={BookOpen} />
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<SectionMarker
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index={1}
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title="Decision Tree Lab"
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icon={AlertTriangle}
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/>
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<SectionMarker index={2} title="Practice Questions" icon={Zap} />
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</nav>
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</aside>
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<div className="flex-1 lg:ml-64 p-6 md:p-12 max-w-4xl mx-auto">
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{/* Section 0 — Concept + Clause Breakdown */}
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<section
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ref={(el) => {
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sectionsRef.current[0] = el;
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}}
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className="min-h-screen flex flex-col justify-center mb-24 pt-20 lg:pt-0"
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>
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<div className="inline-flex items-center gap-2 bg-purple-100 text-purple-700 px-3 py-1 rounded-full text-xs font-bold uppercase tracking-wider mb-4 w-fit">
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Standard English Conventions
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</div>
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<h2 className="text-4xl font-extrabold text-slate-900 mb-2">
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Sentence Structure
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</h2>
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<p className="text-lg text-slate-500 mb-8">
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See how sentences are built — then learn exactly where parallelism
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breaks and modifiers go wrong.
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</p>
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{/* Rule summary grid */}
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<div className="grid grid-cols-1 sm:grid-cols-2 gap-4 mb-8">
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{[
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{
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num: 1,
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rule: "Parallelism in Lists",
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desc: "All list items must match: all gerunds, all infinitives, all nouns, etc.",
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},
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{
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num: 2,
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rule: "Parallel Comparisons",
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desc: "'more X than Y' — X and Y must be the same type (comparing like to like).",
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},
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{
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num: 3,
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rule: "Opening Modifier Rule",
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desc: "The noun immediately after a comma must be what the modifier describes.",
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},
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{
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num: 4,
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rule: "Squinting Modifiers",
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desc: "A modifier must be placed unambiguously next to what it modifies.",
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},
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].map((r) => (
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<div
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key={r.num}
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className="bg-purple-50 border border-purple-200 rounded-xl p-4"
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>
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<div className="flex items-center gap-2 mb-1">
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<span className="w-6 h-6 rounded-full bg-purple-600 text-white flex items-center justify-center text-xs font-bold shrink-0">
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{r.num}
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</span>
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<span className="font-bold text-purple-900 text-sm">
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{r.rule}
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</span>
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</div>
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<p className="text-xs text-slate-600 ml-8">{r.desc}</p>
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</div>
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))}
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</div>
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{/* Clause Breakdown */}
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<h3 className="text-xl font-bold text-slate-800 mb-3">
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Sentence Anatomy
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</h3>
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<p className="text-sm text-slate-500 mb-4">
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Hover over any colored span to see its label. Use the tabs to switch
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between examples.
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</p>
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<ClauseBreakdownWidget
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examples={CLAUSE_EXAMPLES}
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accentColor="purple"
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/>
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{/* SAT Traps */}
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<h3 className="text-xl font-bold text-slate-800 mt-8 mb-4">
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Common SAT Traps
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</h3>
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<div className="space-y-3 mb-8">
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{[
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{
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label: "Subtle Parallelism Break",
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desc: "'researching, to analyze, and write' — the break ('to analyze') looks acceptable but breaks the gerund pattern.",
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},
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{
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label: "Dangling Modifier",
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desc: "'Having reviewed the evidence, a verdict was reached' — the verdict didn't review anything. The jury did.",
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},
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{
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label: "Squinting Modifier",
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desc: "A modifier placed between two clauses so it's unclear which one it modifies.",
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},
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].map((t) => (
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<div
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key={t.label}
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className="flex gap-3 bg-red-50 border border-red-200 rounded-xl px-4 py-3"
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>
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<AlertTriangle className="w-4 h-4 text-red-500 shrink-0 mt-0.5" />
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<div>
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<p className="text-sm font-bold text-red-800">{t.label}</p>
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<p className="text-xs text-slate-600 mt-0.5">{t.desc}</p>
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</div>
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</div>
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))}
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</div>
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<div className="mt-2 bg-purple-900 text-white rounded-2xl p-5">
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<p className="font-bold mb-1">Golden Rule</p>
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<p className="text-sm text-purple-100">
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Parallel structure and modifiers both follow one principle: every
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part of a sentence must connect clearly and consistently to what
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it describes or lists. Mismatch in form or placement = SAT error.
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</p>
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</div>
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<button
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onClick={() => scrollToSection(1)}
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className="mt-12 group flex items-center text-purple-600 font-bold hover:text-purple-800 transition-colors"
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>
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Next: Decision Tree Lab{" "}
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<ArrowDown className="ml-2 w-5 h-5 group-hover:translate-y-1 transition-transform" />
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</button>
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</section>
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{/* Section 1 — Decision Tree */}
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<section
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ref={(el) => {
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sectionsRef.current[1] = el;
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}}
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className="min-h-screen flex flex-col justify-center mb-24"
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>
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<h2 className="text-4xl font-extrabold text-slate-900 mb-2">
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Decision Tree Lab
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</h2>
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<p className="text-lg text-slate-500 mb-8">
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Work through the grammar logic one question at a time. Click your
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answer at each step.
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</p>
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<DecisionTreeWidget scenarios={TREE_SCENARIOS} accentColor="purple" />
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<button
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onClick={() => scrollToSection(2)}
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className="mt-12 group flex items-center text-purple-600 font-bold hover:text-purple-800 transition-colors"
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>
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Next: Practice Questions{" "}
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<ArrowDown className="ml-2 w-5 h-5 group-hover:translate-y-1 transition-transform" />
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</button>
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</section>
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{/* Section 2 — Quiz */}
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<section
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ref={(el) => {
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sectionsRef.current[2] = el;
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}}
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className="min-h-screen flex flex-col justify-center mb-24"
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>
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<h2 className="text-4xl font-extrabold text-slate-900 mb-6">
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Practice Questions
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</h2>
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{FORM_STRUCTURE_EASY.slice(6, 8).map((q) => (
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<PracticeFromDataset key={q.id} question={q} color="purple" />
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))}
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{FORM_STRUCTURE_MEDIUM.slice(3, 4).map((q) => (
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<PracticeFromDataset key={q.id} question={q} color="purple" />
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))}
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<div className="mt-8 text-center">
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<button
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onClick={onFinish}
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className="px-6 py-3 bg-purple-900 text-white font-bold rounded-full hover:bg-purple-700 transition-colors"
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>
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Finish Lesson ✓
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</button>
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</div>
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</section>
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</div>
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</div>
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);
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};
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export default EBRWSentenceStructureLesson;
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