From 4c71a9ac539a5923387b61efb0fc70d8d21f1a03 Mon Sep 17 00:00:00 2001 From: Tis5813 Date: Wed, 1 Apr 2026 23:40:19 +0200 Subject: [PATCH 1/3] completed task-2 --- task-1/queries.sql | 9 + task-2/data/flashcards.db | Bin 0 -> 16384 bytes task-2/migrate.js | 25 ++ task-2/package-lock.json | 467 ++++++++++++++++++++++++++++++++++ task-2/setup.sql | 14 + task-2/src/database.js | 63 +++-- task-2/src/example_output.txt | 32 +++ task-2/src/new_output.txt | 32 +++ 8 files changed, 622 insertions(+), 20 deletions(-) create mode 100644 task-2/data/flashcards.db create mode 100644 task-2/migrate.js create mode 100644 task-2/package-lock.json create mode 100644 task-2/setup.sql create mode 100644 task-2/src/example_output.txt create mode 100644 task-2/src/new_output.txt diff --git a/task-1/queries.sql b/task-1/queries.sql index fecf7ad..2697071 100644 --- a/task-1/queries.sql +++ b/task-1/queries.sql @@ -1,11 +1,20 @@ ---- 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.)_ + -- **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.)_ -- **Question 5** — Add yourself as a new author. Use your real name, or make one up. 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a/task-2/src/database.js +++ b/task-2/src/database.js @@ -20,24 +20,30 @@ const db = new Database(DB_FILE); // ---------------------------------------------------------------- export function getAllDecks() { - // TODO: return all rows from the decks table - throw new Error('Not implemented'); + return db.prepare(`SELECT * FROM decks`).all(); } export function getDeckById(id) { - // TODO: return the deck row with the given id, or null if not found - throw new Error('Not implemented'); + const row = db.prepare(`SELECT * FROM decks WHERE id = ?`).get(id); + return row || null; } export function addDeck(name, description) { - // TODO: insert a new deck and return the new row (including its id) - throw new Error('Not implemented'); + const result = db + .prepare(`INSERT INTO decks (name, description) VALUES (?, ?)`) + .run(name, description || null); + + return db + .prepare(`SELECT * FROM decks WHERE id = ?`) + .get(result.lastInsertRowid); } 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 result = db + .prepare(`DELETE FROM decks WHERE id = ?`) + .run(deckId); + + return result.changes > 0; } // ---------------------------------------------------------------- @@ -45,23 +51,40 @@ export function deleteDeck(deckId) { // ---------------------------------------------------------------- export function getAllCardsForDeck(deckId) { - // TODO: return all card rows whose deckId matches - throw new Error('Not implemented'); + return db + .prepare(`SELECT * FROM cards WHERE deck_id = ?`) + .all(deckId); } 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 result = db + .prepare(` + INSERT INTO cards (question, answer, learned, deck_id) + VALUES (?, ?, 0, ?) + `) + .run(question, answer, deckId); + + return db + .prepare(`SELECT * FROM cards WHERE id = ?`) + .get(result.lastInsertRowid); } 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'); + const result = db + .prepare(`UPDATE cards SET learned = 1 WHERE id = ?`) + .run(cardId); + + if (result.changes === 0) return null; + + return db + .prepare(`SELECT * FROM cards WHERE id = ?`) + .get(cardId); } 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 result = db + .prepare(`DELETE FROM cards WHERE id = ?`) + .run(cardId); + + return result.changes > 0; +} \ No newline at end of file diff --git a/task-2/src/example_output.txt b/task-2/src/example_output.txt new file mode 100644 index 0000000..36ba63d --- /dev/null +++ b/task-2/src/example_output.txt @@ -0,0 +1,32 @@ +=== Flashcard App === + +All decks: + [1] JavaScript Basics — Core JavaScript concepts + [2] SQL Fundamentals — Writing database queries + [3] HTML & CSS — Building web pages + +Looking up deck 2: + Found: SQL Fundamentals + +Cards in "JavaScript Basics" (deck 1): + [1] ✓ learned Q: What is a variable? + [2] ○ not yet Q: What does `const` mean? + [3] ✓ learned Q: What is an array? + [4] ○ not yet Q: What does `===` do? + +Adding a new deck... + Created: [4] Git & GitHub + +Adding a card to the new deck... + Created card [11]: "What is a commit?" + +Marking card 1 as learned... + Card 1 learned status is now: true + +Deleting card 11... + Deleted: true + +Deleting deck 4... + Deleted: true + +=== Done === \ No newline at end of file diff --git a/task-2/src/new_output.txt b/task-2/src/new_output.txt new file mode 100644 index 0000000..7627f0c --- /dev/null +++ b/task-2/src/new_output.txt @@ -0,0 +1,32 @@ +=== Flashcard App === + +All decks: + [1] JavaScript Basics — Core JavaScript concepts + [2] SQL Fundamentals — Writing database queries + [3] HTML & CSS — Building web pages + +Looking up deck 2: + Found: SQL Fundamentals + +Cards in "JavaScript Basics" (deck 1): + [1] ✓ learned Q: What is a variable? + [2] ○ not yet Q: What does `const` mean? + [3] ✓ learned Q: What is an array? + [4] ○ not yet Q: What does `===` do? + +Adding a new deck... + Created: [4] Git & GitHub + +Adding a card to the new deck... + Created card [11]: "What is a commit?" + +Marking card 1 as learned... + Card 1 learned status is now: 1 + +Deleting card 11... + Deleted: true + +Deleting deck 4... + Deleted: true + +=== Done === \ No newline at end of file From 07f4a2ff2cb0b47250afb6d70dd800f49c7f9457 Mon Sep 17 00:00:00 2001 From: Tis5813 Date: Fri, 3 Apr 2026 11:58:14 +0200 Subject: [PATCH 2/3] fixed task-2 --- task-2/data/flashcards.db | Bin 16384 -> 16384 bytes task-2/src/database.js | 4 +++- task-2/src/new_output.txt | 32 -------------------------------- 3 files changed, 3 insertions(+), 33 deletions(-) delete mode 100644 task-2/src/new_output.txt diff --git a/task-2/data/flashcards.db b/task-2/data/flashcards.db index 68692a31076b4842fec521a4f8919af39f253cf1..b6495c1efc39c891d92290a83a54b51824b5c686 100644 GIT binary patch delta 57 zcmZo@U~Fh$oFL7pK2gS*QGH{=J2^(q&HnN;1$YEF8JWcyQ&N+&i#a!c(Z9ySC@}f7 MjVDlA)b=$K0NYa#+W-In delta 57 zcmZo@U~Fh$oFL68JW Date: Fri, 3 Apr 2026 14:38:04 +0200 Subject: [PATCH 3/3] completed task-1 --- task-1/books_library.db | Bin 24576 -> 24576 bytes task-1/queries.sql | 24 +++++++++++++++++++++++- 2 files changed, 23 insertions(+), 1 deletion(-) diff --git a/task-1/books_library.db b/task-1/books_library.db index 88b0418c6cf5291e897c14742bfcd1b1868c352a..c9e54a4e5ee5f573ae1c9fd35470fbf031b61bc7 100644 GIT binary patch delta 221 zcmV<303!c@zyW~30gxL32ay~@1qT2wZo08#pbrBX4FHn|5HSG_v4O`792yx002dh> z0#IRgWo%Swb8cmFQgw54X<=>$!?PS6))Ee73jqTg0bzA?Xm4_J8L}|{4+t_10000o z2nLe}K*h0#ItQ}`Nd5<2G6)3#4-yXG4!aJN4t@?|4m%DC4c!f~4S@|$4H*pL46O`y 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