| import type { TuitionLessonSeed } from "./physicsLessonSeeds"; |
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| export type LessonObjective = { |
| id: string; |
| statement: string; |
| kind: "concept" | "formula" | "application" | "board_answer"; |
| }; |
|
|
| function stableObjectiveId(seed: TuitionLessonSeed, index: number): string { |
| return `${seed.chapterId}:${seed.missionId}:OBJ${index + 1}`; |
| } |
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| function explainableStatement(value: string): string { |
| const trimmed = value.trim().replace(/[.]+$/, ""); |
| if (!trimmed) return "Explain the source-backed lesson idea."; |
| if (/^(explain|define|describe|compare|calculate|derive|write|identify|use|solve)\b/i.test(trimmed)) { |
| return `${trimmed}.`; |
| } |
| if (/^master\b/i.test(trimmed)) return `${trimmed.replace(/^master\b/i, "Explain")}.`; |
| if (/^understand\b/i.test(trimmed)) return `${trimmed.replace(/^understand\b/i, "Explain")}.`; |
| return `Explain ${trimmed}.`; |
| } |
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|
| function missionIdea(seed: TuitionLessonSeed): string { |
| return seed.missionTitle.replace(/^M\d+\s*:\s*/i, "").trim() || seed.chapterTitle; |
| } |
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| function isGenericBlockHeading(value: string): boolean { |
| return /^(understanding|exam focus|remember|quick recap|key points?|in brief)\b/i.test(value.trim()); |
| } |
|
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| export function objectivesForLessonSeed(seed: TuitionLessonSeed): LessonObjective[] { |
| const statements: Array<Omit<LessonObjective, "id">> = [ |
| { kind: "concept", statement: explainableStatement(seed.goal) }, |
| { kind: "concept", statement: `Explain the key idea in ${missionIdea(seed)}.` }, |
| ]; |
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| for (const block of seed.teach.explanationBlocks.slice(0, 3)) { |
| if (block.heading.trim() && !isGenericBlockHeading(block.heading)) { |
| statements.push({ kind: "concept", statement: explainableStatement(block.heading) }); |
| } |
| } |
|
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| for (const formula of seed.formulas.slice(0, 2)) { |
| if (formula.formula.trim()) { |
| statements.push({ |
| kind: "formula", |
| statement: `Use ${formula.formula.trim()} with the correct symbols and units.`, |
| }); |
| } |
| } |
|
|
| if (seed.contentType === "numerical" || seed.quiz.some((question) => question.type === "numerical")) { |
| statements.push({ |
| kind: "application", |
| statement: "Solve a similar application question with the method and final unit shown.", |
| }); |
| } |
|
|
| const boardAnswer = seed.examAnswers[0]; |
| if (boardAnswer) { |
| statements.push({ |
| kind: "board_answer", |
| statement: `Write a concise ${boardAnswer.marks}-mark board answer using the required points.`, |
| }); |
| } |
|
|
| const unique = new Map<string, Omit<LessonObjective, "id">>(); |
| for (const objective of statements) { |
| const key = objective.statement.toLocaleLowerCase("en-IN"); |
| if (!unique.has(key)) unique.set(key, objective); |
| } |
|
|
| return [...unique.values()].slice(0, 6).map((objective, index) => ({ |
| ...objective, |
| id: stableObjectiveId(seed, index), |
| })); |
| } |
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|
