Implement recommend meta

@@ -28,10 +28,34 @@ function onMessage(message, replyToken) {
     if(message.type != 'text')
         return;
     
-    if(message.text.indexOf('아이템') >= 0)
+    if(message.text.indexOf('아이템') >= 0) {
         recommendItem(message.text.split(' ')[0], replyToken);
+        return;
+    }
     
-    
+    let keywords = [
+        '추천덱',
+        '추천메타',
+        '덱추천',
+        '메타추천',
+        '메타덱',
+        '추천시너지',
+        '메타시너지',
+        '시너지추천'
+    ];
+
+    let isMeta = false;
+    let textOnly = message.text.replace(' ', '');
+    for(let k of keywords) {
+        if(textOnly.indexOf(k) >= 0)
+            isMeta = true;
+    }
+    if(isMeta) {
+        recommendMeta(replyToken);
+        return;
+    }
+
+    replyMessage(replyToken, [{type: 'text', text: '수행할 수 없는 명령입니다.'}]);
 }
 
 function recommendItem(charAlias, replyToken) {
@@ -43,12 +67,71 @@ function recommendItem(charAlias, replyToken) {
         else
             reply = `${results[0].alias}의 추천 아이템은 ${results.map(e => e.name).join(', ')} 입니다.`;
 
-        axios.post('https://api.line.me/v2/bot/message/reply', {
-            replyToken: replyToken,
-            messages: [{type: 'text', text: reply}]
-        }, {
-            headers: {'Authorization': channelToken}
+        replyMessage(replyToken, [{type: 'text', text: reply}]);
+    });
+}
+
+async function recommendMeta(replyToken) {
+    let sql = 'SELECT * FROM decks ORDER BY `count` DESC LIMIT 0,3';
+    let [results] = await pool.query(sql);
+    let messages = [];
+
+    for(let row of results) {
+        let chars = [];
+        sql = 'SELECT `alias` FROM character_aliases WHERE character_id=? AND is_name=1';
+        for(let i = 1; i <= 8; i++) {
+            [results] = await pool.query(sql, [row[`character_${i}`]]);
+            chars.push(results[0].alias);
+        }
+    
+        let traitCnt = new Map();
+        traitCnt.set(row.chosen, 1);
+
+        let checked = new Set();
+    
+        sql = 'SELECT trait FROM character_traits WHERE character_id=?';
+        for(let i = 0; i <= 8; i++) {
+            if(checked.has(row[`character_${i}`]))
+                continue;
+
+            [results] = await pool.query(sql, [row[`character_${i}`]]);
+    
+            for(let t of results) {
+                if(traitCnt.has(t.trait))
+                    traitCnt.set(t.trait, traitCnt.get(t.trait) + 1);
+                else
+                    traitCnt.set(t.trait, 1);
+            }
+
+            checked.add(row[`character_${i}`]);
+        }
+    
+        let traits = [];
+        sql = 'SELECT t.name, l.count FROM traits t JOIN trait_levels l ON t.id=l.trait_id WHERE t.id=? AND l.count <= ? ORDER BY l.count DESC LIMIT 1';
+        for(let [key, value] of traitCnt.entries()) {
+            [results] = await pool.query(sql, [key, value]);
+            if(results.length == 0)
+                continue;
+
+            traits.push(`${results[0].count}${results[0].name}`);
+        };
+
+        [results] = await pool.query('SELECT `name` FROM traits WHERE `id`=?', [row.chosen]);
+        messages.push({
+            type: 'text',
+            text: traits.join(', ') + '\n' + chars.join(', ') + '\n' + '선택받은 자: ' + results[0].name
         });
+    }
+
+    replyMessage(replyToken, messages);
+}
+
+function replyMessage(replyToken, messages) {
+    axios.post('https://api.line.me/v2/bot/message/reply', {
+        replyToken: replyToken,
+        messages: messages
+    }, {
+        headers: {'Authorization': channelToken}
     });
 }