IntensityCalculator.py

# -*- coding: utf-8 -*-
# 
# # MIT License
# 
# Copyright (c) 2020 Michael J Simms
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
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# The above copyright notice and this permission notice shall be included in all
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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"""Encapsulates equations for calculating or estimating the intensity of the workout."""

class IntensityCalculator(object):
    """Encapsulates equations for calculating or estimating the intensity of the workout."""

    def __init__(self):
        super(IntensityCalculator, self).__init__()

    @staticmethod
    def estimate_intensity_score_from_pace(workout_duration_secs, avg_workout_pace_meters_per_sec, threshold_pace_meters_per_hour):
        intensity_score = ((workout_duration_secs * avg_workout_pace_meters_per_sec) / threshold_pace_meters_per_hour) * 100.0
        return intensity_score

    @staticmethod
    def calculate_intensity_score_from_power(workout_duration_secs, np, ftp):
        # Sanity check.
        if ftp is None or ftp < 0.1:
            return 0.0

        # Compute the intensity score: (t * NP * IF) / (FTP * 36).
        intensity_score = (workout_duration_secs * np * (np / ftp)) / (ftp * 36)
        return intensity_score