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const mariadb = require("mariadb");
const bcrypt = require("bcrypt");
const nanoid = require("nanoid");
const fs = require("fs").promises;
class DB {
constructor() {
this.pool = mariadb.createPool({
host: process.env.DBHost,
user: process.env.DBUser,
password: process.env.DBPassword,
database: process.env.DBName,
});
}
connect() {
return this.pool.getConnection();
}
async init() {
const tables = await this.getTables();
for (const table of tables) if (table && table.length > 1) await this.query(table);
console.info("Database initialized!");
const res = await this.query("SELECT id FROM users LIMIT 1");
if (res.length === 0) await this.initValues();
}
async initValues() {
await this.query("INSERT INTO types (name) VALUES ('pupil'), ('teacher')");
await this.query(
"INSERT INTO class (name) VALUES ('TGM13.1'), ('TGM13.2'), ('TGTM13.1'), ('TGI13.1'), ('TGI13.2'), ('teacher')",
);
await this.initPolls();
await this.initMottovote();
await this.initProfiles();
await this.initQuestions();
await this.initUsers();
}
async resetAll() {
await this.regenerateTables();
await this.initValues();
}
async regenerateTables() {
const drops = await fs.readFile(__dirname + "/drop.sql", "utf8");
for (const stmt of drops.split(";")) if (stmt && stmt.length > 1) await this.query(stmt);
const tables = await this.getTables();
for (const table of tables) if (table && table.length > 1) await this.query(table);
}
async resetQuotes() {
const tables = await this.getTables();
await this.query("DROP TABLE IF EXISTS quotes");
await this.query(tables[3]);
}
async resetProfiles() {
const tables = await this.getTables();
await this.query("DROP TABLE IF EXISTS profile_comments");
await this.query("DROP TABLE IF EXISTS profile_answers");
await this.query("DROP TABLE IF EXISTS profile_questions");
await this.query("DROP TABLE IF EXISTS profile_input_types");
await this.query(tables[8]);
await this.query(tables[9]);
await this.query(tables[10]);
await this.query(tables[11]);
await this.initProfiles();
}
async initProfiles() {
const types = ["number", "file", "date", "text", "color"];
for (const type of types) {
try {
await this.query("INSERT INTO profile_input_types (type) VALUES (?)", type);
} catch (e) {
continue;
}
}
const data = await fs.readFile(__dirname + "/profile.txt", "utf8");
const questions = data.split("\n");
for (const question of questions) {
if (question) {
const [q, type] = question.split(" - ");
await this.query("INSERT INTO profile_questions (question, question_type) VALUE (?, ?)", [
q,
types.indexOf(type) + 1,
]).catch(() => console.log("Profile question already exists!"));
}
}
}
async resetMottovote() {
const tables = await this.getTables();
await this.query("DROP TABLE IF EXISTS motto_votes");
await this.query("DROP TABLE IF EXISTS mottos");
await this.query(tables[6]);
await this.query(tables[7]);
await this.initMottovote();
}
async initMottovote() {
const data = await fs.readFile(__dirname + "/mottos.txt", "utf8");
const mottos = data.split("\n");
for (const motto of mottos) {
const [name, desc] = motto.split(" - ");
if (motto) {
await this.query("INSERT INTO mottos (name, description) VALUES (?, ?)", [name, desc]).catch(() =>
console.log("Vote option already exists!"),
);
}
}
}
async resetPolls() {
const tables = await this.getTables();
await this.query("DROP TABLE IF EXISTS ranking_questions");
await this.query("DROP TABLE IF EXISTS ranking_answers");
await this.query(tables[4]);
await this.query(tables[5]);
await this.initPolls();
}
async initPolls() {
const data = await fs.readFile(__dirname + "/poll.txt", "utf8");
const parts = data.split("--");
for (const [i, part] of parts.entries()) {
const questions = part.split("\n");
for (const question of questions) {
if (question) {
await this.query("INSERT INTO ranking_questions (question, type_id) VALUE (?,?)", [
question,
i + 1,
]).catch(() => console.log("Poll question already exists!"));
}
}
}
}
async initUsers() {
const data = await fs.readFile(__dirname + "/names.csv", "utf8");
const classes = data.split("--");
const userPasswords = {};
console.log("Generating users");
for (const [classIndex, clazz] of classes.entries()) {
const students = clazz.split("\n");
userPasswords[classIndex] = [];
for (const student of students) {
// Fix undefined
if (student && student.length > 3) {
const [_, surname, name] = student.split(",");
const names = name.split(" ");
const middlename = names.length > 1 && names[1] ? names.slice(1).join(" ") : null;
let username = surname.toLowerCase().slice(0, 6);
if (middlename) username += middlename[0].toLowerCase();
username += names[0].toLowerCase().slice(0, 2);
const pwd = nanoid.nanoid(8);
const password = await bcrypt.hash(pwd, 10);
userPasswords[classIndex].push({ username, pwd });
await this.query(
"INSERT INTO users (username, name, middlename, surname, password, class_id, type_id) VALUE (?,?,?,?,?,?,?)",
[
username,
names[0].replace("\r", ""),
middlename,
surname,
password,
classIndex + 1,
classIndex + 1 === 6 ? 2 : 1,
],
);
}
}
}
await fs.writeFile(__dirname + "/users.json", JSON.stringify(userPasswords));
console.log("Initialized users!");
}
async initQuestions() {
const data = (await fs.readFile(__dirname + "/questions.txt", "utf8")).split("\n");
for (const question of data) {
try {
const [q, a] = question.split(" - ");
const { insertId } = await this.query("INSERT INTO question_questions (question) VALUE (?)", [q]);
for (const answer of a.split(",")) {
await this.query("INSERT INTO question_options (answer_option, question_id) VALUE (?,?)", [answer, insertId]);
}
} catch (e) {
console.error(e);
console.info("Question already exists!");
}
}
}
async resetQuestions() {
const tables = await this.getTables();
await this.query("DROP TABLE IF EXISTS question_answers");
await this.query("DROP TABLE IF EXISTS question_options");
await this.query("DROP TABLE IF EXISTS question_questions");
await this.query(tables[12]);
await this.query(tables[13]);
await this.query(tables[14]);
await this.initQuestions();
}
async regenerateUser(uid) {
const pwd = nanoid.nanoid(8);
const password = await bcrypt.hash(pwd, 10);
await this.query("UPDATE users SET password = ? WHERE id = ?", [password, uid]);
console.log(`New password for ${uid}: ${pwd}`);
}
async query(query, params) {
const conn = await this.connect();
try {
return await conn.query(query, params);
} finally {
conn.release();
}
}
async getTables() {
return (await fs.readFile(__dirname + "/tables.sql", "utf8")).split(";");
}
}
module.exports = new DB();
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