Tag

Termasuk bagian Dasar-Dasar Node.js dalam perjalanan Node.js di Coddy. Pelajaran 24 dari 24.

Tag untuk mengelompokkan catatan: #shop pada setiap catatan belanja, #home pada catatan lainnya.

Pisahkan catatan menjadi kata-kata dan simpan kata yang diawali dengan #; slice(1) menghapus #. Hitung dengan object, lalu urutkan key-nya:

const colors = ['red', 'blue', 'red'];
const counts = {};
for (const c of colors) {
    counts[c] = (counts[c] ?? 0) + 1;
}
Object.keys(counts).sort().forEach((c) => console.log(`${c}: ${counts[c]}`));
// blue: 1, red: 2

Di shell pada laptop, # memulai komentar, jadi tulis catatan dengan tag di dalam tanda kutip.

Tantangan

Mudah

Kata yang diawali dengan # adalah tag sebuah catatan.
tags mencetak satu baris untuk setiap tag, seperti shop: 2, diurutkan berdasarkan nama, tanpa #.
Jika tidak ada tag sama sekali, perintah ini mencetak No tags yet.

Jalankan node notes.js add "Buy milk #shop", tambahkan dua catatan bertag lainnya, lalu jalankan tags.

Coba sendiri

// Alat catatanmu dimulai di sini.
import { rmSync } from 'node:fs';
import path from 'node:path';
import { formatNote } from './format.js';
import stats from './legacy/stats.cjs';
import pkg from './package.json' with { type: 'json' };
import store from './store.js';

const [command, ...words] = process.argv.slice(2);
const text = words.join(' ');

store.on('added', (note, n) => {
    console.log(`Saved note ${n}.`);
});

const noteNumber = (word) => {
    const n = Number(word);
    if (!Number.isInteger(n) || n < 1 || n > store.notes.length) {
        console.error(`No note ${word}`);
        process.exit(1);
    }
    return n;
};

if (command === 'add') {
    await store.add(text);
} else if (command === 'list') {
    const owner = process.env.NOTES_OWNER ?? 'you';
    console.log(`Notes for ${owner}`);
    if (store.notes.length === 0) {
        console.log('No notes yet');
    }
    const lines = store.notes.map((note, i) => formatNote(i + 1, note));
    if (store.settings.sort === 'newest') {
        lines.reverse();
    }
    lines.forEach((line) => console.log(line));
} else if (command === 'where') {
    const file = path.join(process.cwd(), 'notes.json');
    console.log(file);
    console.log(path.basename(file));
} else if (command === 'stats') {
    console.log(`${store.notes.length} notes, ${stats.countWords(store.notes)} words`);
} else if (command === 'done') {
    const removed = await store.remove(noteNumber(words[0]));
    console.log(`Done: ${removed}`);
} else if (command === 'remind') {
    const note = store.notes[noteNumber(words[0]) - 1];
    let count = 3;
    const timer = setInterval(() => {
        if (count > 0) {
            console.log(count);
            count -= 1;
        } else {
            console.log(note);
            clearInterval(timer);
        }
    }, 200);
} else if (command === 'import') {
    let input = '';
    for await (const chunk of process.stdin) {
        input += chunk;
    }
    const lines = input
        .split('\n')
        .map((line) => line.trim())
        .filter((line) => line !== '');
    for (const line of lines) {
        await store.add(line);
    }
    console.log(`Imported ${lines.length} notes.`);
} else if (command === 'version') {
    console.log(`${pkg.name} ${pkg.version}`);
} else if (command === 'search') {
    const word = text.toLowerCase();
    let found = 0;
    store.notes.forEach((note, i) => {
        if (note.toLowerCase().includes(word)) {
            console.log(formatNote(i + 1, note));
            found += 1;
        }
    });
    if (found === 0) {
        console.log(`No notes match ${text}`);
    }
} else if (command === 'clear') {
    rmSync('notes.json', { force: true });
    console.log('Deleted notes.json');
} else {
    if (command) {
        console.error(`Unknown command: ${command}`);
    }
    console.error('Usage: node notes.js <command> [words]');
    process.exit(1);
}