奇遇随机添加权重

game-server/app/util/util.ts

@@ -48,17 +48,19 @@ import { GOOD_TYPE } from '../consts/consts';
           let [gid, count, frequency] = arr;
           if(isNaN(gid) || isNaN(count)) throw new Error('格式错误');
           result = { gid: parseInt(gid), count: parseInt(count), frequency: parseInt(frequency) };
+          break;
         }
         case 'eventSuitLevel': {
           let [min, max] = arr;
           if(isNaN(min) || isNaN(max)) throw new Error('格式错误');
           result = { min: parseInt(min), max: parseInt(max) };
-
+          break;
         }
         case 'attribute': {
           let [id, value] = arr;
           if(isNaN(id) || isNaN(value)) throw new Error('格式错误');
           result = { id: parseInt(id), value: parseInt(value) };
+          break;
         }
       }
       return result;
@@ -170,3 +172,21 @@ export function decodeIdCntArrayStr(str: string, multi: number) {
     return ce;
   }
 
+
+  export function getRandomWithWeight(randomList: any) {
+    let len = randomList.reduce((pre, cur) => {
+        return pre + cur.weight||1;
+    }, 0);
+    let index = Math.floor(Math.random() * len);
+    let result = { dic: null, index: -1 };
+    for(let i = 0; i < randomList.length; i++) {
+        let {weight = 0} = randomList[i];
+        if(index < weight) {
+          result.dic = randomList[i]; 
+          result.index = i;
+          break;
+        }
+        index -= weight;
+    }
+    return result
+}