Merge branch 'feature/220524_nodejs_orm_model' into 'main'

Feature/220524 nodejs orm model

# nodejs 서버 유저 및 키워드 database connection 및 모델 생성 및 쿼리 함수

## database connection

1. Sequelize ORM 사용하여 db connection

## Model

1. User model 생성
2. Keyword model 생성
3. User-Keyword many to many 관계 생성

## Query

- addKeyword
  - 키워드 추가 함수 `INPUT: {keyword, userId}`
  - 유저 id 기반으로 키워드 추가 및 연결 테이블 레코드 생성

- deleteKeyword
  - 키워드 삭제 함수 `INPUT: {userId, keyword}`
  - 유저 id 기반으로 연결 테이블 레코드 삭제

- getKeywordsByUserId
  - 유저가 등록한 키워드 조회 함수 `INPUT: {userId}`
  - 유저 id 기반으로 연결된 모든 키워드 조회

- getUsersByKeyword
  - 키워드를 등록환 유저 조회 함수 `INPUT: {keyword}`
  - 키워드 기반으로 연결된 모든 유저 조회

- getAllUsers
  - 등록된 모든 유저 조회 함수 `INPUT: {NONE}`

- getAllKeywords
  - 등록된 모든 키워드 조회 함수 `INPUT: {NONE}`

See merge request !17

+let database = module.exports = {};
+
+const db = require("../models")
+const User = db.user
+const Keyword = db.keyword
+const UserKeyword = db.userKeyword
+
+
+database.addKeyword = async function(keyword, userId) {
+
+    const u = await User.findOrCreate({
+        where: {
+            userId: userId
+        }
+    })
+
+    const k = await Keyword.findOrCreate({
+        where: {
+            keyword: keyword
+        }
+    })
+
+    await UserKeyword.findOrCreate({
+        where: {
+            userId: u[0].id,
+            keywordId: k[0].id
+        }
+    })
+}
+
+database.deleteKeyword = async function(userId, keyword) {
+
+    const u = await User.findOrCreate({
+        where: {
+            userId: userId
+        }
+    })
+
+    const k = await Keyword.findOrCreate({
+        where: {
+            keyword: keyword
+        }
+    })
+
+    await UserKeyword.destroy({
+        where: {
+            userId: u[0].id,
+            keywordId: k[0].id
+        }
+    })
+}
+
+database.getKeywordsByUserId = async function(userId) {
+
+    const keywords = await Keyword.findAll({
+        attributes: ['keyword'],
+        where: {
+            '$user.userId$': userId
+        },
+        include: [{
+            attributes: [],
+            model: User,
+            as: 'user'
+        }],
+        raw: true
+    })
+
+    let result = []
+    for (let i = 0; i < keywords.length; i++) {
+        result.push(keywords[i].keyword)
+    }
+
+    return result
+}
+
+database.getUsersByKeyword = async function(keyword) {
+
+    const users = await User.findAll({
+        attributes: ['userId'],
+        where: {
+            '$keyword.keyword$': keyword
+        },
+        include: [{
+            attributes: [],
+            model: Keyword,
+            as: 'keyword'
+        }],
+        raw: true
+    })
+
+    let result = []
+    for (let i = 0; i < users.length; i++) {
+        result.push(users[i].userId)
+    }
+
+    return result
+}
+
+database.getAllUsers = async function() {
+
+    const users = await User.findAll({
+        raw: true
+    })
+
+    let result = []
+    for (let i = 0; i < users.length; i++) {
+        result.push(users[i].userId)
+    }
+
+    return result
+}
+
+database.getAllKeywords = async function() {
+
+    const keywords = await Keyword.findAll({
+        raw: true
+    })
+
+    let result = []
+    for (let i = 0; i< keywords.length; i++) {
+        result.push(keywords[i].keyword)
+    }
+
+    console.log(result)
+    return result
+}
\ No newline at end of file

@@ -3,13 +3,35 @@ const line = require("@line/bot-sdk");
 const setFlexMessage = require("./apis/setFlexMessage");
 const fs = require("fs");
 
+const { sequelize } = require('./models')
+const database = require("./apis/database");
+
+// Initialize DB connection
+sequelize.sync({ force: false })
+    .then(() => {
+        console.log('database connection complete');
+        database.addKeyword("rtx3060", "junseok")
+        database.getKeywordsByUserId("junseok")
+        database.deleteKeyword("phobyjun", "rtx3080")
+        database.getAllUsers()
+        database.getUsersByKeyword("rtx3060")
+        database.getAllKeywords()
+    })
+    .catch((err) => {
+        console.log('database connection failed');
+    });
+
+// Load .env configuration
 require("dotenv").config();
 const config = {
   channelAccessToken: process.env.channelAccessToken,
   channelSecret: process.env.channelSecret,
 };
 
+// Express app server initialization
 const app = express();
+
+// Create post request handler for chatbot
 app.post("/webhook", line.middleware(config), (req, res) => {
   Promise.all(req.body.events.map(handleEvent)).then((result) =>
     res.json(result)

+{
+  "development": {
+    "username": "root",
+    "password": "mamuri",
+    "database": "mamuri_db",
+    "host": "127.0.0.1",
+    "dialect": "mysql"
+  },
+  "test": {
+    "username": "root",
+    "password": null,
+    "database": "database_test",
+    "host": "127.0.0.1",
+    "dialect": "mysql"
+  },
+  "production": {
+    "username": "root",
+    "password": null,
+    "database": "database_production",
+    "host": "127.0.0.1",
+    "dialect": "mysql"
+  }
+}

+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const Sequelize = require('sequelize');
+const basename = path.basename(__filename);
+const env = process.env.NODE_ENV || 'development';
+const config = require(__dirname + '/../config/config.json')[env];
+const db = {};
+
+let sequelize;
+if (config.use_env_variable) {
+  sequelize = new Sequelize(process.env[config.use_env_variable], config);
+} else {
+  sequelize = new Sequelize(config.database, config.username, config.password, config);
+}
+
+fs
+  .readdirSync(__dirname)
+  .filter(file => {
+    return (file.indexOf('.') !== 0) && (file !== basename) && (file.slice(-3) === '.js');
+  })
+  .forEach(file => {
+    const model = require(path.join(__dirname, file))(sequelize, Sequelize.DataTypes);
+    db[model.name] = model;
+  });
+
+Object.keys(db).forEach(modelName => {
+  if (db[modelName].associate) {
+    db[modelName].associate(db);
+  }
+});
+
+db.sequelize = sequelize;
+db.Sequelize = Sequelize;
+
+db.user = require("./user")(sequelize, Sequelize);
+db.keyword = require("./keyword")(sequelize, Sequelize);
+db.userKeyword = sequelize.define('user_keywords');
+
+db.user.belongsToMany(db.keyword, {through: db.userKeyword, as: 'keyword'});
+db.keyword.belongsToMany(db.user, {through: db.userKeyword, as: 'user'});
+
+module.exports = db;

+module.exports = (sequelize, DataTypes) => {
+
+    return sequelize.define("keyword", {
+        id: {
+            type: DataTypes.INTEGER,
+            autoIncrement: true,
+            primaryKey: true
+        },
+        keyword: {
+            type: DataTypes.STRING,
+            allowNull: false
+        }
+    })
+}
\ No newline at end of file

+module.exports = (sequelize, DataTypes) => {
+
+    return sequelize.define("user", {
+        id: {
+            type: DataTypes.INTEGER,
+            autoIncrement: true,
+            primaryKey: true
+        },
+        userId: {
+            type: DataTypes.STRING,
+            allowNull: false
+        }
+    })
+}
\ No newline at end of file

@@ -18,6 +18,8 @@
     "@line/bot-sdk": "^7.5.0",
     "dotenv": "^16.0.1",
     "express": "^4.18.1",
-    "nodemon": "^2.0.16"
+    "mysql2": "^2.3.3",
+    "nodemon": "^2.0.16",
+    "sequelize": "^6.20.0"
   }
 }