Add script to migrate database from MongoDB to PostgreSQL

convertdb.js

@@ -0,0 +1,76 @@
+require("dotenv").config();
+const { promisify } = require("util");
+const { writeFile } = require("fs");
+const { Pool } = require("pg");
+const pool = new Pool({
+  user: "esmbot",
+  host: "localhost",
+  database: "esmbot",
+  port: 5432
+});
+const mongoose = require("mongoose");
+mongoose.connect(process.env.MONGO, { poolSize: 10, bufferMaxEntries: 0, reconnectTries: 5000, useNewUrlParser: true, useUnifiedTopology: true });
+const guildSchema = new mongoose.Schema({
+  id: String,
+  tags: Map,
+  prefix: String,
+  warns: Map,
+  disabledChannels: [String]
+});
+const Guild = mongoose.model("Guild", guildSchema);
+
+const tweetSchema = new mongoose.Schema({
+  tweets: [String],
+  replies: [String],
+  media: [String],
+  phrases: [String],
+  games: [String],
+  characters: [String],
+  download: [String],
+  enabled: Boolean
+});
+const TweetCollection = mongoose.model("TweetCollection", tweetSchema);
+
+const globalSchema = new mongoose.Schema({
+  cmdCounts: Map
+});
+const Global = mongoose.model("Global", globalSchema);
+
+(async () => {
+  console.log("Migrating guilds...");
+  const guilds = await Guild.find();
+  try {
+    await pool.query("CREATE TABLE guilds ( guild_id VARCHAR(30) NOT NULL, tags json NOT NULL, prefix VARCHAR(15) NOT NULL, warns json NOT NULL, disabled text ARRAY NOT NULL )");
+  } catch {
+    console.log("Skipping table creation due to error...");
+  }
+  for (const guild of guilds) {
+    if ((await pool.query("SELECT * FROM guilds WHERE guild_id = $1", [guild.id])).rows.length !== 0) {
+      await pool.query("UPDATE guilds SET tags = $1, prefix = $2, warns = $3, disabled = $4 WHERE guild_id = $5", [guild.tags, guild.prefix, guild.warns, guild.disabledChannels, guild.id]);
+    } else {
+      await pool.query("INSERT INTO guilds (guild_id, tags, prefix, warns, disabled) VALUES ($1, $2, $3, $4, $5)", [guild.id, guild.tags, guild.prefix, guild.warns, guild.disabledChannels]);
+    }
+    console.log(`Migrated guild with ID ${guild.id}`);
+  }
+  console.log("Migrating Tweets...");
+  const tweets = await TweetCollection.find();
+  await promisify(writeFile)("../tweets.json", JSON.stringify(tweets, null, 2));
+  console.log("Migrating command counts...");
+  const global = await Global.findOne();
+  try {
+    await pool.query("CREATE TABLE counts ( command VARCHAR NOT NULL, count integer NOT NULL )");
+  } catch {
+    console.log("Skipping table creation due to error...");
+  }
+  console.log(global);
+  for (const [key, value] of global.cmdCounts) {
+    if ((await pool.query("SELECT * FROM counts WHERE command = $1", [key])).rows.length !== 0) {
+      await pool.query("UPDATE counts SET count = $1 WHERE command = $2", [value, key]);
+    } else {
+      await pool.query("INSERT INTO counts (command, count) VALUES ($1, $2)", [key, value]);
+    }
+    console.log(`Migrated counts for command ${key}`);
+  }
+  console.log("Done!");
+  return;
+})();