Merge branch 'server' into 'master'

BE-API 최종구현

## BACKEND API 최종구현

- calcDistance 구현  
 ( 넘어온 word에 대해서 1. 원본/  2. 특수기호, 영어, 숫자 제거 / 3. 특수기호, 영어, 숫자 표준화  
각각의 disassenbled 된 단어들로 db 욕설들과 유사도 검사 => 최소 값 검증)

See merge request !2

+
+const e = require('express');
+const levenshtein = require('js-levenshtein');
+const db = require('../model/db');
+const {calcDistance} = require('../service/calcDistance');
+const {getProfanity} = require('../service/query');
+const {standardize, removeSpecial} = require('../service/standardization');
+
+
+exports.calcDistance = async (req, res, next) => {
+    const { word } = req.body;
+  
+    const profanityList = await getProfanity();
+  
+    let specialRemoved = removeSpecial(word);
+    let specialNotRemoved = word;
+    
+    specialRemoved = standardize(specialRemoved);
+    specialNotRemoved = standardize(specialNotRemoved);
+
+    const rareResult = calcDistance(word, profanityList);
+    const specialRemovedResult = calcDistance(specialRemoved, profanityList);
+    const specialNotRemovedResult = calcDistance(specialNotRemoved, profanityList);
+
+    const minResult = Math.min(rareResult, specialRemovedResult, specialNotRemovedResult);
+
+    if (minResult <= 1){
+        res.status(200).json({success : true, isProfanity : "YES"});
+    }else{
+        res.status(200).json({success : true, isProfanity : "NO"});
+    }
+  };
\ No newline at end of file

@@ -2,16 +2,15 @@ const mysql = require('mysql2/promise');
 const dotenv = require('dotenv');
 const path = require('path');
 
-dotenv.config({path:path.join(__dirname, "../.env")});
+dotenv.config({ path: path.join(__dirname, '../.env') });
 
-const db = mysql
-  .createPool({
-    host: process.env.DB_HOST,
-    user: process.env.DB_USER,
-    port: process.env.DB_PORT,
-    password: process.env.DB_PASSWORD,
-    database: process.env.DB_DATABASE,
-    connectionLimit: 10,
-  });
+const db = mysql.createPool({
+  host: process.env.DB_HOST,
+  user: process.env.DB_USER,
+  port: process.env.DB_PORT,
+  password: process.env.DB_PASSWORD,
+  database: process.env.DB_DATABASE,
+  connectionLimit: 10,
+});
 
 module.exports = db;

@@ -14,6 +14,7 @@
     "hangul-js": "^0.2.6",
     "http-errors": "~1.6.3",
     "jade": "~1.11.0",
+    "js-levenshtein": "^1.1.6",
     "morgan": "~1.9.1",
     "mysql2": "^2.2.5"
   },

@@ -2,9 +2,9 @@ const express = require('express');
 
 const router = express.Router();
 
+const { calcDistance } = require('../controller/calcDistance');
+
 /* GET home page. */
-router.post('/checkProfanity', (req, res) => {
-  res.send('hello');
-});
+router.post('/checkProfanity', calcDistance);
 
 module.exports = router;

+/* eslint-disable no-restricted-syntax */
+const levenshtein = require('js-levenshtein');
+const Hangul = require('hangul-js');
+
+exports.calcDistance = (word, profanityList) => {
+  let leastLevenshtein = 1000;
+
+  for (const profanity of profanityList[0]) {
+    let compareWord = Hangul.disassemble(profanity.content);
+    compareWord = compareWord.join('');
+    if (leastLevenshtein > levenshtein(word, compareWord)) {
+      leastLevenshtein = levenshtein(word, compareWord);
+    }
+  }
+
+  return leastLevenshtein;
+};

+const db = require('../model/db');
+
+exports.getProfanity = async () => {
+  const selectResult = await db.query("SELECT DISTINCT content from profanity");
+
+  return selectResult;
+};

 /* eslint-disable no-use-before-define */
 /* eslint-disable no-restricted-syntax */
+const { config } = require('dotenv');
 const Hangul = require('hangul-js');
 
 const standardize = (word) => {
@@ -12,7 +13,7 @@ const standardize = (word) => {
         ? standardizeConsonent(letter)
         : standardizeVowel(letter);
     } else {
-      const preLetter = index === 1 ? '' : disassembledWord[index - 1];
+      const preLetter = index === 0 ? '' : disassembledWord[index - 1];
       const nextLetter = index === disassembledWord.length - 1 ? '' : disassembledWord[index + 1];
       newLetter = isVowelSpecial(preLetter, letter, nextLetter)
         ? standardizeSpecialVowel(letter)
@@ -92,40 +93,72 @@ const isVowelSpecial = (preLetter, letter, nextLetter) => {
 
 const standardizeSpecialConsonent = (letter) => {
   switch (letter) {
-    case ('g', 'ㅑ'):
-      return 'ㅏ';
-    case ('ㅗ', 'ㅛ'):
-      return 'ㅗ';
-    case ('ㅐ', 'ㅒ', 'ㅔ', 'ㅖ', 'ㅙ', 'ㅚ', 'ㅝ', 'ㅞ'):
-      return 'ㅐ';
-    case ('ㅜ', 'ㅠ'):
-      return 'ㅜ';
-    case ('ㅓ', 'ㅕ'):
-      return 'ㅓ';
-    case ('ㅟ', 'ㅢ', 'ㅣ'):
-      return 'ㅣ';
+    case ('g', 'k', 'G', 'K'):
+      return 'ㄱ';
+    case ('b', 'v', 'B', 'V'):
+      return 'ㅂ';
+    case ('P', 'p', 'F', 'f'):
+      return 'ㅍ';
+    case ('n', 'L', 'N'):
+      return 'ㄴ';
+    case ('s', 'A', 'S', 'C', 'c'):
+      return 'ㅅ';
+    case ('d', 't', 'E'):
+      return 'ㄷ';
+    case ('o', 'O'):
+      return 'ㅇ';
+    case ('r', 'R'):
+      return 'ㄹ';
+    case ('j', 'z', 'J', 'Z'):
+      return 'ㅈ';
+    case ('m', '口', 'M'):
+      return 'ㅁ';
+    case ('h', 'H'):
+      return 'ㅎ';
     default:
       return letter;
   }
 };
 
 const standardizeSpecialVowel = (letter) => {
+  let result = '';
+
   switch (letter) {
-    case ('g', 'ㅑ'):
-      return 'ㅏ';
-    case ('ㅗ', 'ㅛ'):
-      return 'ㅗ';
-    case ('ㅐ', 'ㅒ', 'ㅔ', 'ㅖ', 'ㅙ', 'ㅚ', 'ㅝ', 'ㅞ'):
-      return 'ㅐ';
-    case ('ㅜ', 'ㅠ'):
-      return 'ㅜ';
-    case ('ㅓ', 'ㅕ'):
-      return 'ㅓ';
-    case ('ㅟ', 'ㅢ', 'ㅣ'):
-      return 'ㅣ';
+    case ('a', 'A'):
+      result = 'ㅏ';
+      break;
+    case ('u', 'U'):
+      result = 'ㅓ';
+      break;
+    case ('@', 'H'):
+      result = 'ㅐ';
+      break;
+    case ('l', 'i', 'I', '!', 1):
+      result = 'ㅣ';
+      break;
+    case '1':
+      result = 'ㅣ';
+      break;
     default:
-      return letter;
+      result = letter;
+      break;
   }
+
+  return result;
+};
+
+const removeSpecial = (word) => {
+  const numCheck = /[0-9]/g; // 숫자
+
+  const engCheck = /[a-zA-Z]/g; // 문자
+
+  const specialCheck = /[~!@#$%^&*()_+|<>?:{}]/g; // 특수문자
+
+  let result = word.replace(numCheck, '');
+  result = result.replace(engCheck, '');
+  result = result.replace(specialCheck, '');
+
+  return result;
 };
 
-module.exports = { standardize };
+module.exports = { standardize, removeSpecial };