🐘 Added PostgreSQL

p.s. tested basic functionality, but can still have bugs

README.md

@@ -93,6 +93,8 @@ You should also change settings for database connection. Supported database back
 Example: `"./storage.db"`
 - `mongodb` - MongoDB database. Connection string should be a valid MongoDB connection string.  
 Example: `"mongodb://127.0.0.1:27017/dbname"`
+- `postgres` - PostgreSQL database. Database must be created manually (tables will be created automatically). Connection string should be a valid PostgreSQL connection string.
+Example: `"postgres://user:password@localhost:5432/dbname"`
 
 Run the bot:
 ```

package.json

@@ -29,6 +29,7 @@
     "mongodb": "^5.7.0",
     "nodemon": "^3.0.1",
     "opusscript": "^0.1.0",
+    "pg": "^8.11.2",
     "sqlite3": "^5.1.6"
   },
   "devDependencies": {

src/database/postgres.js

@@ -0,0 +1,138 @@
+const DatabaseContext = require('../types/db_context');
+const { Client } = require('pg');
+const config = require('../../config.json');
+
+module.exports = class PostgresContext extends DatabaseContext {
+    async init() {
+        this.logger.info('Database', '🐘 Connecting to PostgreSQL database...');
+        this.client = new Client(this.connection_string);
+        await this.client.connect();
+
+        // Create tables if they don't exist
+        const createTable = async (name, columns) => {
+            const res = await this.client.query(`SELECT to_regclass('${name}')`);
+            if (!res.rows[0].to_regclass) {
+                await this.client.query(`CREATE TABLE ${name} (${columns})`);
+            }
+        }
+
+        await createTable('guilds', 'id BIGINT PRIMARY KEY, prefix TEXT, language TEXT, xp_enabled BOOLEAN, automod_enabled BOOLEAN, welcome_channel BIGINT, welcome_msg TEXT, log_channel BIGINT');
+        await createTable('users', 'id BIGINT, guild_id BIGINT, xp BIGINT, PRIMARY KEY (id, guild_id)');
+        await createTable('profiles', 'id BIGINT PRIMARY KEY, description TEXT, color TEXT');
+        await createTable('custom_commands', 'guild_id BIGINT, command_name TEXT, response TEXT, PRIMARY KEY (guild_id, command_name)');
+        await createTable('stats', 'commands_executed BIGINT, slash_commands BIGINT');
+    }
+
+    close() {
+        this.client.end();
+    }
+
+    async getGuilds() {
+        const guilds = await this.client.query('SELECT * FROM guilds');
+        return guilds.rows;
+    }
+    async getGuild(guild_id) {
+        const guild = await this.client.query('SELECT * FROM guilds WHERE id = $1', [guild_id]);
+        return guild.rows[0];
+    }
+    async createGuild(guild_id) {
+        const guild = {
+            id: guild_id,
+            prefix: config.bot.prefix,
+            language: config.default_language,
+            xp_enabled: config.bot.xp.enabled ? 1 : 0,
+            automod_enabled: config.bot.automod.enabled ? 1 : 0,
+            welcome_channel: null,
+            welcome_msg: null,
+            log_channel: null,
+        };
+
+        await this.client.query('INSERT INTO guilds (id, prefix, language, xp_enabled, automod_enabled, welcome_channel, welcome_msg, log_channel) VALUES ($1, $2, $3, $4, $5, $6, $7, $8)', [guild.id, guild.prefix, guild.language, guild.xp_enabled, guild.automod_enabled, guild.welcome_channel, guild.welcome_msg, guild.log_channel]);
+
+        return guild;
+    }
+    async updateGuild(guild) {
+        await this.client.query('UPDATE guilds SET prefix = $1, language = $2, xp_enabled = $3, automod_enabled = $4, welcome_channel = $5, welcome_msg = $6, log_channel = $7 WHERE id = $8', [guild.prefix, guild.language, guild.xp_enabled, guild.automod_enabled, guild.welcome_channel, guild.welcome_msg, guild.log_channel, guild.id]);
+    }
+    async deleteGuild(guild_id) {
+        await this.client.query('DELETE FROM guilds WHERE id = $1', [guild_id]);
+    }
+
+    async getUsers(guild_id) {
+        const users = await this.client.query('SELECT * FROM users WHERE guild_id = $1 ORDER BY xp DESC', [guild_id]);
+        return users.rows;
+    }
+    async getUser(user_id, guild_id) {
+        const user = await this.client.query('SELECT * FROM users WHERE id = $1 AND guild_id = $2', [user_id, guild_id]);
+        return user.rows[0];
+    }
+    async createUser(user) {
+        await this.client.query('INSERT INTO users (id, guild_id, xp) VALUES ($1, $2, $3)', [user.id, user.guild_id, user.xp]);
+    }
+    async updateUser(user) {
+        await this.client.query('UPDATE users SET xp = $1 WHERE id = $2 AND guild_id = $3', [user.xp, user.id, user.guild_id]);
+    }
+    async deleteUser(user_id, guild_id) {
+        await this.client.query('DELETE FROM users WHERE id = $1 AND guild_id = $2', [user_id, guild_id]);
+    }
+
+    async getProfiles() {
+        const profiles = await this.client.query('SELECT * FROM profiles');
+        return profiles.rows;
+    }
+    async getProfile(user_id) {
+        const profile = await this.client.query('SELECT * FROM profiles WHERE id = $1', [user_id]);
+        return profile.rows[0];
+    }
+    async createProfile(profile) {
+        await this.client.query('INSERT INTO profiles (id, description, color) VALUES ($1, $2, $3)', [profile.id, profile.description, profile.color]);
+    }
+    async updateProfile(profile) {
+        await this.client.query('UPDATE profiles SET description = $1, color = $2 WHERE id = $3', [profile.description, profile.color, profile.id]);
+    }
+    async deleteProfile(user_id) {
+        await this.client.query('DELETE FROM profiles WHERE id = $1', [user_id]);
+    }
+
+    async getCustomCommands(guild_id) {
+        const custom_commands = await this.client.query('SELECT * FROM custom_commands WHERE guild_id = $1', [guild_id]);
+        return custom_commands.rows;
+    }
+    async getCustomCommand(guild_id, command_name) {
+        const custom_command = await this.client.query('SELECT * FROM custom_commands WHERE guild_id = $1 AND command_name = $2', [guild_id, command_name]);
+        return custom_command.rows[0];
+    }
+    async createCustomCommand(custom_command) {
+        await this.client.query('INSERT INTO custom_commands (guild_id, command_name, response) VALUES ($1, $2, $3)', [custom_command.guild_id, custom_command.command_name, custom_command.response]);
+    }
+    async updateCustomCommand(custom_command) {
+        await this.client.query('UPDATE custom_commands SET response = $1 WHERE guild_id = $2 AND command_name = $3', [custom_command.response, custom_command.guild_id, custom_command.command_name]);
+    }
+    async deleteCustomCommand(guild_id, command_name) {
+        await this.client.query('DELETE FROM custom_commands WHERE guild_id = $1 AND command_name = $2', [guild_id, command_name]);
+    }
+
+    async getStats() {
+        const stats = await this.client.query('SELECT * FROM stats');
+        if (stats.rows.length === 0) {
+            await this.client.query('INSERT INTO stats (commands_executed, slash_commands) VALUES (0, 0)');
+            return { commands_executed: 0, slash_commands: 0 };
+        }
+        return {
+            commands_executed: parseInt(stats.rows[0].commands_executed),
+            slash_commands: parseInt(stats.rows[0].slash_commands)
+        }
+    }
+
+    async updateStats(stats) {
+        await this.client.query('UPDATE stats SET commands_executed = $1, slash_commands = $2', [stats.commands_executed, stats.slash_commands]);
+    }
+
+    async incrementCommandUsage() {
+        await this.client.query('UPDATE stats SET commands_executed = commands_executed + 1');
+    }
+
+    async incrementSlashCommandUsage() {
+        await this.client.query('UPDATE stats SET slash_commands = slash_commands + 1');
+    }
+}