scanDiagnosticsToJson function

Map<String, Object> scanDiagnosticsToJson(List<ScanDiagnostic> diagnostics)

Serializes diagnostics to the same JSON structure used by dart run saropa_lints scan --format json.

Schema:

• version: 1 (int)
• diagnostics: list of objects with: filePath, line, column, ruleName, severity, problemMessage, correctionMessage (optional)
• summary: object with totalCount, byFile (map filePath -> count), byRule (map ruleName -> count)

Implementation

Map<String, Object> scanDiagnosticsToJson(List<ScanDiagnostic> diagnostics) {
  final list = diagnostics
      .map(
        (d) => <String, Object?>{
          'filePath': d.filePath,
          'line': d.line,
          'column': d.column,
          'ruleName': d.ruleName,
          'severity': d.severity,
          'problemMessage': d.problemMessage,
          'correctionMessage': d.correctionMessage,
        },
      )
      .toList();

  final byFile = <String, int>{};
  final byRule = <String, int>{};
  for (final d in diagnostics) {
    byFile[d.filePath] = (byFile[d.filePath] ?? 0) + 1;
    byRule[d.ruleName] = (byRule[d.ruleName] ?? 0) + 1;
  }

  return <String, Object>{
    kScanJsonVersion: 1,
    kScanJsonDiagnostics: list,
    kScanJsonSummary: <String, Object>{
      kScanJsonTotalCount: diagnostics.length,
      kScanJsonByFile: byFile,
      kScanJsonByRule: byRule,
    },
  };
}