utils.py

def convert_to_chartjs_format(input_data):
    """
    Converts input data into a Chart.js compatible format.

    Parameters:
    - input_data (dict): The input data containing chart information.

    Returns:
    - dict: A dictionary formatted for Chart.js.
    """
    # Determine the chart type, defaulting to 'line' if not specified
    chart_type = input_data.get('type', 'line')

    # Extract data points
    data_points = input_data.get('data', [])

    # Check if data_points is a list and has at least one item
    if isinstance(data_points, list) and data_points:
        # Extract the first dictionary to determine label and data keys
        first_item = data_points[0]
        if isinstance(first_item, dict) and len(first_item) >= 2:
            # Get the first two keys
            keys = list(first_item.keys())
            label_key = keys[0]
            data_key = keys[1]

            # Extract labels and data
            labels = [item.get(label_key) for item in data_points]
            data = [item.get(data_key) for item in data_points]

            # Create the Chart.js compatible structure
            chartjs_data = {
                "type": chart_type,
                "data": {
                    "labels": labels,
                    "datasets": [
                        {
                            "label": data_key,
                            "data": data
                        }
                    ]
                }
            }

            return chartjs_data

    # Return an empty structure if input data is not as expected
    return {
        "type": chart_type,
        "data": {
            "labels": [],
            "datasets": []
        }
    }