fix: Correctly extract decision when used with prefix

src/lib/base/GenerateBuilder.ts

@@ -1,10 +1,14 @@
 ///<reference path="AbstractBuilder.ts"/>
+let fs = require('fs')
 import { AbstractBuilder } from './AbstractBuilder'
 
+import Config from '../Config'
 import Utils from '../utils'
 import getAdrFiles from '../helpers/getAdrFiles'
 import * as walkSync from 'walk-sync'
 
+let savePath = Config.getSavePath()
+
 export class GenerateBuilder implements AbstractBuilder {
   path: string
   files: walkSync.Entry[]
@@ -23,12 +27,11 @@ export class GenerateBuilder implements AbstractBuilder {
     let bodyString = this.bodyString
     this.files.forEach(function (file) {
       let fileName = file.relativePath
-      let fileNameLength = fileName.length
-      let numberLength = Utils.getNumberLength(fileName) + '-'.length
-      let markdownWithPrefixLength = '.md'.length
       let index = Utils.getIndexByString(fileName)
+      let fileData = fs.readFileSync(savePath + fileName, 'utf8')
+      let firstLine = fileData.split('\n')[0]
       if (index) {
-        let decision = fileName.substring(numberLength, fileNameLength - markdownWithPrefixLength)
+        let decision = firstLine.replace(/#\s\d+\.\s/g, '')
         handleBody(index, decision, file, bodyString, files.length)
       }
     })

src/lib/utils.ts

@@ -91,8 +91,10 @@ function generateFileName (originFileName) {
 }
 
 function getNumberLength (fileName: string): number {
-  let numberLength = fileName.split('-')[0]
-  return numberLength.length
+  let numberLength = fileName
+    .substring(Config.getPrefix().length)
+    .split('-')[0]
+  return Config.getPrefix().length + numberLength.length
 }
 
 function getIndexByString (fileName: string): number {