before delete 3software

backend/_old/v8/include/db.js

@@ -0,0 +1,46 @@
+const fs = require('fs')
+const crypto = require('crypto')
+const sqlite3 = require('better-sqlite3')
+
+const db = sqlite3(`./data/db.sqlite`)
+db.pragma('journal_mode = WAL')
+db.pragma('foreign_keys = on')
+
+db.exec(fs.readFileSync('./data/init.sql', 'utf8'))
+
+db.function('generate_key', (id, time) => {
+	return [
+		'KEY',
+		Buffer.from(time + '').toString('base64'),	
+		crypto.createHash('md5').update(`sa${time}-${id}lt`).digest('hex')
+	].join('-')
+})
+
+process.on('exit', () => db.close())
+process.on('SIGHUP', () => process.exit(128 + 1))
+process.on('SIGINT', () => process.exit(128 + 2))
+process.on('SIGTERM', () => process.exit(128 + 15))
+
+db.prepareUpdate = function (table, columns, data, where) {
+	const dataColumns = columns.filter(col => col in data)
+	if (dataColumns.length == 0)
+		throw Error('SQLite Error: No data to update')
+
+	return db.prepare(`update "${table}" ` +
+		`set ` + dataColumns.map(col => `"${col}" = :${col}`).join(', ') + 
+		` where ` + where.map(col => `"${col}" = :${col}`).join(' and ')) 		
+}
+
+db.prepareUpsert = function (table, columns, data, where) {
+	const dataColumns = columns.filter(col => col in data)
+	if (dataColumns.length == 0)
+		throw Error('SQLite Error: No data to update')
+
+	return db.prepare(
+		`insert into "${table}" (` + [...dataColumns, ...where].join(', ') + `) values (:` + [...dataColumns, ...where].join(', :') +
+		`) on conflict (` + where.join(',')  + `) do update ` +
+		`set ` + dataColumns.map(col => `"${col}" = :${col}`).join(', ') + 
+		` where ` + where.map(col => `"${col}" = :${col}`).join(' and '))		
+}
+
+module.exports = db