fromJsonString static method

ImportResult fromJsonString(String jsonContent, { String schemaName = 'ImportedData', })

Imports from a JSON string

Implementation

static ImportResult fromJsonString(
  String jsonContent, {
  String schemaName = 'ImportedData',
}) {
  try {
    final decoded = jsonDecode(jsonContent);

    List<Map<String, dynamic>> dataList;
    if (decoded is List) {
      dataList = decoded
          .map((e) => Map<String, dynamic>.from(e as Map))
          .toList();
    } else if (decoded is Map) {
      dataList = [Map<String, dynamic>.from(decoded)];
    } else {
      return ImportResult(
        schema: _createEmptySchema(schemaName),
        data: [],
        rowCount: 0,
        error: 'Invalid JSON format',
      );
    }

    if (dataList.isEmpty) {
      return ImportResult(
        schema: _createEmptySchema(schemaName),
        data: [],
        rowCount: 0,
        error: 'Empty JSON',
      );
    }

    // Extract the fields from the first object
    final firstItem = dataList.first;
    final fields = <FieldDefinition>[];

    firstItem.forEach((key, value) {
      fields.add(
        FieldDefinition(
          name: key,
          displayName: _formatDisplayName(key),
          type: _inferType(value),
          isRequired: false,
        ),
      );
    });

    final schema = _ImportedDataSchema(
      name: schemaName,
      displayName: schemaName,
      description: 'Schema imported from JSON',
      fields: fields,
      sampleData: firstItem,
    );

    return ImportResult(
      schema: schema,
      data: dataList,
      rowCount: dataList.length,
    );
  } catch (e) {
    return ImportResult(
      schema: _createEmptySchema(schemaName),
      data: [],
      rowCount: 0,
      error: 'Error parsing the JSON: $e',
    );
  }
}