工程名称下拉项获取兼容.md文件，同时新增自定义答案合成类

backend/app/engine/loaders/markdownReader.py

@@ -13,6 +13,8 @@ class ChunkMarkdownReader(MarkdownReader):
     ) -> None:
         self._chunkSize = chunkSize
         self._tokenizer = get_tokenizer()
+        self._colheader = ''
+        self._rows = []
         super().__init__(*args,**kwargs)
 
     def markdown_to_tups(self, markdown_text: str) -> List[Tuple[Optional[str], str]]:
@@ -34,6 +36,8 @@ class ChunkMarkdownReader(MarkdownReader):
                 tokensNum =  headerSize
                 current_lines.clear()
             current_lines.append(line)
+            if strTitle!='' and strheader!='':
+                self._rows.append(line)
 
             if line == '\n' or line == '\r':
                 if tokensNum > self._chunkSize:
@@ -43,10 +47,12 @@ class ChunkMarkdownReader(MarkdownReader):
                 current_lines.clear()
                         
             if line.startswith("|---"):
+                self._colheader = current_lines[0]
                 strheader = "\n".join(current_lines) 
                 headerSize= headerSize + self._token_size(strheader)  
                 current_lines.clear() 
 
+
         if len(current_lines) > 0:
             if len(markdown_tups) == 0:
                 markdown_tups.append((strTitle + strheader , "\n".join(current_lines)))
@@ -62,4 +68,22 @@ class ChunkMarkdownReader(MarkdownReader):
         ]
 
     def _token_size(self, text: str) -> int:
-        return len(self._tokenizer(text))
+        return len(self._tokenizer(text))
+    
+    def findValue(self,expression:str,Field:str):
+        cols = self._colheader.split('|')
+        cols =  [item for item in cols if item]
+
+        for row in self._rows:
+            rowtrs = row.split('|')
+            rowdatas =  [item for item in rowtrs if item and (item!='\r' or item!='\n')]
+            if len(rowdatas) == 0:
+                continue
+            gData = {}
+            for cName,rValue in zip(cols,rowdatas):
+                gData[cName] = rValue
+            if eval(expression,gData):
+                return gData[Field]
+        return ''
+
+