diff --git a/.vscode/settings.json b/.vscode/settings.json index 0c13e99..8b97c5c 100644 --- a/.vscode/settings.json +++ b/.vscode/settings.json @@ -1,6 +1,10 @@ { "editor.inlineSuggest.enabled": false, "github.copilot.enable": { - "javascript": false + "*": true, + "plaintext": false, + "markdown": false, + "scminput": false, + "javascript": true } } diff --git a/task-1/books_library.db b/task-1/books_library.db index 88b0418..1d976b9 100644 Binary files a/task-1/books_library.db and b/task-1/books_library.db differ diff --git a/task-1/queries.sql b/task-1/queries.sql index fecf7ad..57ba531 100644 --- a/task-1/queries.sql +++ b/task-1/queries.sql @@ -1,20 +1,53 @@ ---- Queries -- **Question 1** — List the title and published year of every book in the `'Science Fiction'` genre, ordered by published year (oldest first). +SELECT title,published_year FROM books +WHERE genre = 'Science Fiction' +ORDER BY published_year ASC; + -- **Question 2** — Show every book published before 1950. Display the title and year only. +SELECT title,published_year FROM books +WHERE published_year < 1950; + + -- **Question 3** — Show every book in the database along with its author's full name. Combine `first_name` and `last_name` into a single column called `author`. _(Hint: you will need a JOIN.)_ +SELECT + b.title, + a.first_name || ' ' || a.last_name AS author +FROM books b +INNER JOIN authors a ON a.id = b.author_id; + -- **Question 4** — List all books written by Stephen King. Show the title and published year, ordered by year. _(Hint: JOIN the two tables and filter on the author's name.)_ +SELECT + b.title, + b.published_year, + a.first_name || ' ' || a.last_name AS author +FROM books b +INNER JOIN authors a ON a.id = b.author_id +WHERE a.first_name || ' ' || a.last_name = 'Stephen King' +ORDER BY published_year; + + -- **Question 5** — Add yourself as a new author. Use your real name, or make one up. Pick any nationality and birth year. +INSERT INTO authors (first_name, last_name, nationality, birth_year) +VALUES ('Salem', 'Ba-Rabuod', 'Yemeni', 1990); -- **Question 6** — Add one book for the author you just inserted. It can be a real book or a made-up one. +INSERT INTO books (title, published_year, genre, author_id) +VALUES ('The Journey of Salem', 2026, 'Biography', 26); -- **Question 7** — The genre for "The Dark Tower: The Gunslinger" was entered incorrectly as `'Fantasy'`. It should be `'Horror'`. Write an UPDATE to fix it, then verify the change with a SELECT. +UPDATE books +SET genre = 'Horror' +WHERE title = 'The Dark Tower: The Gunslinger'; + -- **Question 8** — Delete the book you added in Question 6. Make sure your query targets only that specific row. +Delete from books where title = 'The Journey of Salem' AND author_id = 26; --- diff --git a/task-2/app.js b/task-2/app.js index 0c4e472..10784ec 100644 --- a/task-2/app.js +++ b/task-2/app.js @@ -12,19 +12,19 @@ import { markCardLearned, deleteCard, deleteDeck, -} from "./src/database.js"; +} from './src/database.js'; -console.log("=== Flashcard App ===\n"); +console.log('=== Flashcard App ===\n'); // 1. List all decks -console.log("All decks:"); +console.log('All decks:'); const decks = getAllDecks(); decks.forEach((deck) => { console.log(` [${deck.id}] ${deck.name} — ${deck.description}`); }); // 2. Get a single deck by id -console.log("\nLooking up deck 2:"); +console.log('\nLooking up deck 2:'); const deck2 = getDeckById(2); console.log(` Found: ${deck2.name}`); @@ -32,26 +32,26 @@ console.log(` Found: ${deck2.name}`); console.log('\nCards in "JavaScript Basics" (deck 1):'); const cards = getAllCardsForDeck(1); cards.forEach((card) => { - const status = card.learned ? "✓ learned" : "○ not yet"; + const status = card.learned ? '✓ learned' : '○ not yet'; console.log(` [${card.id}] ${status} Q: ${card.question}`); }); // 4. Add a new deck -console.log("\nAdding a new deck..."); -const newDeck = addDeck("Git & GitHub", "Version control basics"); +console.log('\nAdding a new deck...'); +const newDeck = addDeck('Git & GitHub', 'Version control basics'); console.log(` Created: [${newDeck.id}] ${newDeck.name}`); // 5. Add a card to the new deck -console.log("\nAdding a card to the new deck..."); +console.log('\nAdding a card to the new deck...'); const newCard = addCard( - "What is a commit?", - "A snapshot of your changes saved to the repository", + 'What is a commit?', + 'A snapshot of your changes saved to the repository', newDeck.id, ); console.log(` Created card [${newCard.id}]: "${newCard.question}"`); // 6. Mark a card as learned -console.log("\nMarking card 1 as learned..."); +console.log('\nMarking card 1 as learned...'); const updated = markCardLearned(1); console.log(` Card 1 learned status is now: ${updated.learned}`); @@ -65,4 +65,4 @@ console.log(`\nDeleting deck ${newDeck.id}...`); const deckDeleted = deleteDeck(newDeck.id); console.log(` Deleted: ${deckDeleted}`); -console.log("\n=== Done ==="); +console.log('\n=== Done ==='); diff --git a/task-2/data/flashcards.db b/task-2/data/flashcards.db new file mode 100644 index 0000000..42476fd Binary files /dev/null and b/task-2/data/flashcards.db differ diff --git a/task-2/migrate.js b/task-2/migrate.js new file mode 100644 index 0000000..eb4e79d --- /dev/null +++ b/task-2/migrate.js @@ -0,0 +1,33 @@ +import fs from 'node:fs'; +import Database from 'better-sqlite3'; + +const data = fs.readFileSync('data/data.json', 'utf-8'); +const content = JSON.parse(data); + +const dataMigrate = new Database('data/flashcards.db'); + +const insertDecks = dataMigrate.prepare(` + INSERT INTO decks (name, description) + VALUES (@name, @description) +`); + +for (const deck of content.decks) { + insertDecks.run({ + name: deck.name, + description: deck.description, + }); +} + +const insertCards = dataMigrate.prepare(` + INSERT INTO cards (question, answer, learned, deck_id) + VALUES (@question, @answer, @learned, @deck_id) +`); + +for (const card of content.cards) { + insertCards.run({ + question: card.question, + answer: card.answer, + learned: card.learned ? 1 : 0, + deck_id: card.deckId, + }); +} diff --git a/task-2/package-lock.json b/task-2/package-lock.json new file mode 100644 index 0000000..72fc35b --- /dev/null +++ b/task-2/package-lock.json @@ -0,0 +1,467 @@ +{ + "name": "flashcard-app", + "version": "1.0.0", + "lockfileVersion": 3, + "requires": true, + "packages": { + "": { + "name": "flashcard-app", + "version": "1.0.0", + "dependencies": { + "better-sqlite3": "^12.8.0" + } + }, + "node_modules/base64-js": { + 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-20,24 +20,36 @@ const db = new Database(DB_FILE); // ---------------------------------------------------------------- export function getAllDecks() { - // TODO: return all rows from the decks table - throw new Error('Not implemented'); + const decks = db.prepare('SELECT * FROM decks').all(); + return decks; } export function getDeckById(id) { - // TODO: return the deck row with the given id, or null if not found - throw new Error('Not implemented'); + const query = db.prepare('SELECT * FROM decks WHERE id = ?'); + const deck = query.get(id); + return deck; } export function addDeck(name, description) { - // TODO: insert a new deck and return the new row (including its id) - throw new Error('Not implemented'); + const insertDecks = db.prepare(` + INSERT INTO decks (name, description) + VALUES (@name, @description) +`); + const info = insertDecks.run({ + name: name, + description: description, + }); + + return { + id: info.lastInsertRowid, + name: name, + description: description, + }; } export function deleteDeck(deckId) { - // TODO: delete the deck with the given id - // return true if a row was deleted, false otherwise - throw new Error('Not implemented'); + const info = db.prepare('DELETE FROM decks WHERE id = ?').run(deckId); + return info.changes > 0; } // ---------------------------------------------------------------- @@ -45,23 +57,42 @@ export function deleteDeck(deckId) { // ---------------------------------------------------------------- export function getAllCardsForDeck(deckId) { - // TODO: return all card rows whose deckId matches - throw new Error('Not implemented'); + const query = db.prepare( + `SELECT id, question, answer, learned, deck_id AS deckId FROM cards WHERE deck_id = ?`, + ); + const cards = query.all(deckId); + return cards; } export function addCard(question, answer, deckId) { - // TODO: insert a new card and return the new row (including its id) - throw new Error('Not implemented'); + const insertCards = db.prepare(` + INSERT INTO cards (question, answer, deck_id) + VALUES (@question, @answer, @deckId)`); + + const info = insertCards.run({ + question: question, + answer: answer, + deckId: deckId, + }); + + return { + id: info.lastInsertRowid, + question: question, + answer: answer, + deckId: deckId, + }; } export function markCardLearned(cardId) { - // TODO: set learned = 1 for the card with the given id - // return the updated row, or null if not found - throw new Error('Not implemented'); + db.prepare('UPDATE cards SET learned = 1 WHERE id = ?').run(cardId); + const card = db.prepare('SELECT * FROM cards WHERE id = ?').get(cardId); + if (!card) return null; + card.learned = true; + return card; } export function deleteCard(cardId) { - // TODO: delete the card with the given id - // return true if a row was deleted, false otherwise - throw new Error('Not implemented'); + const deleteCard = db.prepare('DELETE FROM cards WHERE id = ?'); + const info = deleteCard.run(cardId); + return info.changes > 0; }