builder.py

# rgb: 2025_06_16_21_27-mastlab-yao-0001
# radardata: 2025_06_16_21_27-mastlab-yao-1400-2D-2-2-0001-076-5.90
# depth:  2025_06_16_21_27-mastlab-yao-0001
#
import os
import polars as pl
import re


def build_table(data_root):
    depth_table = build_single_table(data_root, "depthdata", parse_depth_data)
    radar_table = build_single_table(data_root, "radardata", parse_radar_data)
    rgbdata_table = build_single_table(data_root, "rgbdata", parse_rgbdata_data)

    t1 = depth_table.join(
        rgbdata_table,
        left_on=["id", "index_depth", "sub_index_depth"],
        right_on=["id", "index_rgb", "sub_index_rgb"],
    ).rename({"index_depth": "index_frame", "sub_index_depth": "sub_index_frame"})

    assert_columns_equal(t1, "time", "time_right")
    t1 = t1.drop("time_right")

    print(t1["index_frame"])

    print(t1)
    # print(t1.columns)

    data_table = t1.join(
        radar_table,
        left_on=["id", "index_frame"],
        right_on=["id", "index_radar"],
        how="inner",
    )

    assert_columns_equal(data_table, "time", "time_right")
    data_table = data_table.drop("time_right")

    return data_table


def assert_columns_equal(df, col1, col2):
    """Assert that two columns have identical values"""
    are_equal = (df[col1] == df[col2]).all()
    assert are_equal, f"Columns {col1} and {col2} are not identical"
    print(f"✓ Columns {col1} and {col2} are identical")


def build_single_table(data_root, source_relatvie_root, parse_func):
    data = []
    for file_name in os.listdir(os.path.join(data_root, source_relatvie_root)):
        if (
            file_name.endswith(".npy")
            or file_name.endswith(".npz")
            or file_name.endswith(".mat")
        ):
            try:
                parsed_data = parse_func(source_relatvie_root, file_name)
                data.append(parsed_data)
            except ValueError as e:
                print(f"Error parsing {file_name}: {e}")
    return pl.DataFrame(data)


def parse_depth_data(source_relatvie_root, file_name):
    """
    769E33E0_2025_06_16_21_27-mastlab-yao-0001-1.npy
    """
    base_name = file_name.split(".")[0]

    # Parse the base name to extract the relevant information
    parts = base_name.split("-")
    if len(parts) != 5:
        raise ValueError(
            "Base name format is incorrect. Expected format: YYYY_MM_DD_HH_MM-<other_info>-<other_info>-<other_info>"
        )

    id, time_part = split_id_time(parts[0])
    return dict(
        id=id,
        time=time_part,
        location_depth=parts[1],
        subject_depth=parts[2],
        index_depth=int(parts[3]),
        sub_index_depth=int(parts[4]),
        file_path_depth=os.path.join(
            source_relatvie_root, file_name
        ),  # Use the relative path
    )


def parse_radar_data(source_relatvie_root, file_name):
    """
    769E33E0_2025_06_16_21_27-mastlab-yao-1400-2D-2-2-0001-076-5.90.mat
    """
    base_name = file_name.split(".")[0]
    # Parse the base name to extract the relevant information
    parts = base_name.split("-")
    if len(parts) != 10:
        raise ValueError(
            "Base name format is incorrect. Expected format: XXXXXXXX_YYYY_MM_DD_HH_MM-<other_info>-<other_info>-<other_info>-<other_info>-<other_info>-<other_info>"
        )
    id, time_part = split_id_time(parts[0])
    return dict(
        id=id,
        time=time_part,
        location_radar=parts[1],
        subject_radar=parts[2],
        length_radar_cube=int(parts[3]),
        dimension_radar=parts[4],
        window_size_radar=int(parts[5]),
        window_stride_radar=int(parts[6]),
        index_radar=int(parts[7]),
        selected_range_bin=int(parts[8]),
        enthrophy=float(parts[9]),
        file_path_radar=os.path.join(
            source_relatvie_root,
            file_name,  # Use the relative path
        ),
    )


def parse_rgbdata_data(source_relatvie_root, file_name):
    """
    769E33E0_2025_06_16_21_27-mastlab-yao-0001-1.npy
    """

    base_name = file_name.split(".")[0]

    # Parse the base name to extract the relevant information
    parts = base_name.split("-")
    if len(parts) != 5:
        raise ValueError(
            "Base name format is incorrect. Expected format: xxxx_YYYY_MM_DD_HH_MM-<other_info>-<other_info>-<other_info>-<other_info>"
        )
    id, time_part = split_id_time(parts[0])

    return dict(
        id=id,
        time=time_part,
        location_rgb=parts[1],
        subject_rgb=parts[2],
        index_rgb=int(parts[3]),
        sub_index_rgb=int(parts[4]),
        file_path_rgb=os.path.join(
            source_relatvie_root, file_name
        ),  # Use the relative path
    )


def split_id_time(part):
    pattern = r"^([0-9A-F]+)_(\d{4}_\d{2}_\d{2}_\d{2}_\d{2})$"
    id_part, time_part = part.split("_", 1)
    match = re.match(pattern, part)
    if match:
        id_part = match.group(1)
        time_part = match.group(2)
        return id_part, time_part
    else:
        raise ValueError("String format is incorrect")


if __name__ == "__main__":
    data_root = os.path.dirname(os.path.abspath(__file__))
    data_table = build_table(data_root)
    print(data_table)
    print(data_table.columns)
    # data_table.write_parquet("./train.parquet")
    data_table.write_parquet("./train.parquet")