csv interface minor update to use the csv exceptions for errors

src/corelibs/csv_handling/csv_interface.py

@@ -7,6 +7,9 @@ from typing import Any, Sequence
 from pathlib import Path
 from collections import Counter
 import csv
+from corelibs.exceptions.csv_exceptions import (
+    NoCsvReader, CompulsoryCsvHeaderCheckFailed, CsvHeaderDataMissing
+)
 
 DELIMITER = ","
 QUOTECHAR = '"'
@@ -50,17 +53,19 @@ class CsvWriter:
             csv.DictWriter[str] | None: _description_
         """
         # if header order is set, make sure all header value fields exist
+        if not self.header:
+            raise CsvHeaderDataMissing("No header data available to write CSV file")
         header_values = self.header
         if header_order is not None:
             if Counter(header_values) != Counter(header_order):
-                raise ValueError(
+                raise CompulsoryCsvHeaderCheckFailed(
                     "header order does not match header values: "
                     f"{', '.join(header_values)} != {', '.join(header_order)}"
                 )
             header_values = header_order
         # no duplicates
         if len(header_values) != len(set(header_values)):
-            raise ValueError(f"Header must have unique values only: {', '.join(header_values)}")
+            raise CompulsoryCsvHeaderCheckFailed(f"Header must have unique values only: {', '.join(header_values)}")
         try:
             fp = open(
                 self.__file_name,
@@ -76,7 +81,7 @@ class CsvWriter:
             csv_file_writer.writeheader()
             return csv_file_writer
         except OSError as err:
-            raise ValueError(f"Could not open CSV file for writing: {err}") from err
+            raise NoCsvReader(f"Could not open CSV file for writing: {err}") from err
 
     def write_csv(self, line: dict[str, str]) -> None:
         """
@@ -135,14 +140,16 @@ class CsvReader:
                 quoting=self.__quoting,
             )
             self.header = csv_file_reader.fieldnames
+            if not self.header:
+                raise CsvHeaderDataMissing("No header data available in CSV file")
             if self.__header_check is not None:
                 header_diff = set(self.__header_check).difference(set(self.header or []))
                 if header_diff:
-                    raise ValueError(
+                    raise CompulsoryCsvHeaderCheckFailed(
                         f"CSV header does not match expected header: {', '.join(header_diff)} missing"
                     )
             return csv_file_reader
         except OSError as err:
-            raise ValueError(f"Could not open CSV file for reading: {err}") from err
+            raise NoCsvReader(f"Could not open CSV file for reading: {err}") from err
 
 # __END__