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API Reference

Activity streams module for stream data management.

This module provides activity stream data operations, including retrieval, creation, and transformation of heart rate, power, cadence, elevation, speed, pace, and map streams.

Exports
  • CRUD: get_activity_streams, get_activities_streams, get_public_activity_streams, get_activity_stream_by_type, get_public_activity_stream_by_type, create_activity_streams
  • Utils: transform_activity_streams, transform_activity_streams_hr, is_stream_hidden, filter_visible_streams
  • Schemas: ActivityStreams
  • Models: ActivityStreams (ORM model)
  • Constants: STREAM_TYPE_HR, STREAM_TYPE_POWER, STREAM_TYPE_CADENCE, STREAM_TYPE_ELEVATION, STREAM_TYPE_SPEED, STREAM_TYPE_PACE, STREAM_TYPE_MAP

ActivityStreams

Bases: BaseModel

Schema for activity stream data.

Attributes:

Name Type Description
id StrictInt | None

Unique stream identifier.
activity_id StrictInt

Parent activity identifier.
stream_type StrictInt

Stream type code (1-7).
stream_waypoints list[dict]

Waypoint data points.
strava_activity_stream_id StrictInt | None

Strava stream ID.
hr_zone_percentages dict | None

HR zone breakdown.
Source code in backend/app/activities/activity_streams/schema.py 
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class ActivityStreams(BaseModel):
    """
    Schema for activity stream data.

    Attributes:
        id: Unique stream identifier.
        activity_id: Parent activity identifier.
        stream_type: Stream type code (1-7).
        stream_waypoints: Waypoint data points.
        strava_activity_stream_id: Strava stream ID.
        hr_zone_percentages: HR zone breakdown.
    """

    model_config = ConfigDict(
        from_attributes=True,
    )

    id: StrictInt | None = None
    activity_id: StrictInt
    stream_type: StrictInt
    stream_waypoints: list[dict]
    strava_activity_stream_id: StrictInt | None = None
    hr_zone_percentages: dict | None = None

ActivityStreamsModel

Bases: Base

ORM model for activity stream data.

Attributes:

Name Type Description
id Mapped[int]

Primary key, auto-incremented.
activity_id Mapped[int]

FK to the parent activity.
stream_type Mapped[int]

Stream type integer code.
stream_waypoints Mapped[list]

JSON waypoint data.
strava_activity_stream_id Mapped[int | None]

Strava stream ID.
Source code in backend/app/activities/activity_streams/models.py 
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class ActivityStreams(Base):
    """
    ORM model for activity stream data.

    Attributes:
        id: Primary key, auto-incremented.
        activity_id: FK to the parent activity.
        stream_type: Stream type integer code.
        stream_waypoints: JSON waypoint data.
        strava_activity_stream_id: Strava stream ID.
    """

    __tablename__ = "activities_streams"

    id: Mapped[int] = mapped_column(
        primary_key=True,
        autoincrement=True,
    )
    activity_id: Mapped[int] = mapped_column(
        ForeignKey(
            "activities.id",
            ondelete="CASCADE",
        ),
        nullable=False,
        index=True,
        comment=(
            "Activity ID that the activity"
            " stream belongs"
        ),
    )
    stream_type: Mapped[int] = mapped_column(
        nullable=False,
        comment=(
            "Stream type (1-HR, 2-Power,"
            " 3-Cadence, 4-Elevation,"
            " 5-Velocity, 6-Pace, 7-lat/lon)"
        ),
    )
    stream_waypoints: Mapped[list] = mapped_column(
        JSON,
        nullable=False,
        comment="Store waypoints data",
    )
    strava_activity_stream_id: Mapped[
        int | None
    ] = mapped_column(
        nullable=True,
        comment="Strava activity stream ID",
    )

    # Define a relationship to the Activity model
    activity: Mapped["Activity"] = relationship(
        back_populates="activities_streams",
    )

create_activity_streams 

create_activity_streams(activity_streams, db)

Bulk create activity streams.

Parameters:

Name Type Description Default
activity_streams list[ActivityStreams]

List of stream schemas.

 required
db Session

Database session.

 required

Raises:

Type Description
HTTPException

On database errors.
Source code in backend/app/activities/activity_streams/crud.py 
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def create_activity_streams(
    activity_streams: list[
        activity_streams_schema.ActivityStreams
    ],
    db: Session,
) -> None:
    """
    Bulk create activity streams.

    Args:
        activity_streams: List of stream schemas.
        db: Database session.

    Raises:
        HTTPException: On database errors.
    """
    try:
        streams = [
            activity_streams_models.ActivityStreams(
                activity_id=(
                    stream.activity_id
                ),
                stream_type=stream.stream_type,
                stream_waypoints=(
                    stream.stream_waypoints
                ),
                strava_activity_stream_id=(
                    stream
                    .strava_activity_stream_id
                ),
            )
            for stream in activity_streams
        ]

        db.add_all(streams)
        db.commit()
    except SQLAlchemyError as err:
        db.rollback()
        core_logger.print_to_log_and_console(
            "Error in"
            " create_activity_streams:"
            f" {err}",
            "error",
            exc=err,
        )
        raise HTTPException(
            status_code=(
                status
                .HTTP_500_INTERNAL_SERVER_ERROR
            ),
            detail="Internal Server Error",
        ) from err

filter_visible_streams 

filter_visible_streams(streams, activity)

Filter out streams hidden by the activity.

Parameters:

Name Type Description Default
streams list[ActivityStreams]

List of stream ORM instances.

 required
activity Activity

The activity ORM instance.

 required

Returns:

Type Description
list[ActivityStreams]

Streams that are not hidden.
Source code in backend/app/activities/activity_streams/utils.py 
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def filter_visible_streams(
    streams: list[
        activity_streams_models.ActivityStreams
    ],
    activity: activity_models.Activity,
) -> list[
    activity_streams_models.ActivityStreams
]:
    """
    Filter out streams hidden by the activity.

    Args:
        streams: List of stream ORM instances.
        activity: The activity ORM instance.

    Returns:
        Streams that are not hidden.
    """
    return [
        s
        for s in streams
        if not is_stream_hidden(
            activity, s.stream_type
        )
    ]

get_activities_streams 

get_activities_streams(activity_ids, token_user_id, db, activities=None)

Get streams for multiple activities.

Parameters:

Name Type Description Default
activity_ids list[int]

List of activity IDs.

 required
token_user_id int

Authenticated user ID.

 required
db Session

Database session.

 required
activities list[Activity] | None

Pre-fetched activity list.

 None

Returns:

Type Description
list[ActivityStreams]

List of activity streams.

Raises:

Type Description
HTTPException

On database errors.
Source code in backend/app/activities/activity_streams/crud.py 
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def get_activities_streams(
    activity_ids: list[int],
    token_user_id: int,
    db: Session,
    activities: list[
        activity_models.Activity
    ] | None = None,
) -> list[
    activity_streams_schema.ActivityStreams
]:
    """
    Get streams for multiple activities.

    Args:
        activity_ids: List of activity IDs.
        token_user_id: Authenticated user ID.
        db: Database session.
        activities: Pre-fetched activity list.

    Returns:
        List of activity streams.

    Raises:
        HTTPException: On database errors.
    """
    try:
        if not activity_ids:
            return []

        if not activities:
            stmt = select(
                activity_models.Activity
            ).where(
                activity_models.Activity.id.in_(
                    activity_ids
                )
            )
            activities = (
                db.scalars(stmt).all()
            )

        if not activities:
            return []

        activity_map = {
            a.id: a for a in activities
        }

        allowed_ids = [
            a.id
            for a in activities
            if a.user_id == token_user_id
        ]

        if not allowed_ids:
            return []

        stmt = select(
            activity_streams_models.ActivityStreams
        ).where(
            activity_streams_models.ActivityStreams
            .activity_id.in_(allowed_ids)
        )
        all_streams = db.scalars(stmt).all()

        if not all_streams:
            return []

        return [
            activity_streams_utils
            .transform_activity_streams(
                stream,
                activity_map[
                    stream.activity_id
                ],
                db,
            )
            for stream in all_streams
        ]
    except SQLAlchemyError as err:
        core_logger.print_to_log(
            "Error in get_activities_streams:"
            f" {err}",
            "error",
            exc=err,
        )
        raise HTTPException(
            status_code=(
                status
                .HTTP_500_INTERNAL_SERVER_ERROR
            ),
            detail="Internal Server Error",
        ) from err

get_activity_stream_by_type 

get_activity_stream_by_type(activity_id, stream_type, token_user_id, db)

Get a specific stream type for an activity.

Parameters:

Name Type Description Default
activity_id int

The activity identifier.

 required
stream_type int

The stream type constant.

 required
token_user_id int

Authenticated user ID.

 required
db Session

Database session.

 required

Returns:

Type Description
ActivityStreams | None

The activity stream or None.

Raises:

Type Description
HTTPException

On database errors.
Source code in backend/app/activities/activity_streams/crud.py 
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def get_activity_stream_by_type(
    activity_id: int,
    stream_type: int,
    token_user_id: int,
    db: Session,
) -> (
    activity_streams_schema.ActivityStreams
    | None
):
    """
    Get a specific stream type for an activity.

    Args:
        activity_id: The activity identifier.
        stream_type: The stream type constant.
        token_user_id: Authenticated user ID.
        db: Database session.

    Returns:
        The activity stream or None.

    Raises:
        HTTPException: On database errors.
    """
    try:
        activity = (
            activity_crud.get_activity_by_id(
                activity_id, db
            )
        )

        if not activity:
            return None

        stmt = select(
            activity_streams_models.ActivityStreams
        ).where(
            activity_streams_models.ActivityStreams
            .activity_id == activity_id,
            activity_streams_models.ActivityStreams
            .stream_type == stream_type,
        )
        activity_stream = (
            db.scalars(stmt).first()
        )

        if not activity_stream:
            return None

        if token_user_id != activity.user_id:
            if activity_streams_utils\
                    .is_stream_hidden(
                activity,
                activity_stream.stream_type,
            ):
                return None

        return (
            activity_streams_utils
            .transform_activity_streams(
                activity_stream, activity, db
            )
        )
    except SQLAlchemyError as err:
        core_logger.print_to_log(
            "Error in"
            " get_activity_stream_by_type:"
            f" {err}",
            "error",
            exc=err,
        )
        raise HTTPException(
            status_code=(
                status
                .HTTP_500_INTERNAL_SERVER_ERROR
            ),
            detail="Internal Server Error",
        ) from err

get_activity_streams 

get_activity_streams(activity_id, token_user_id, db)

Get all streams for an activity.

Parameters:

Name Type Description Default
activity_id int

The activity identifier.

 required
token_user_id int

Authenticated user ID.

 required
db Session

Database session.

 required

Returns:

Type Description
list[ActivityStreams] | None

List of activity streams or None.

Raises:

Type Description
HTTPException

On database errors.
Source code in backend/app/activities/activity_streams/crud.py 
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def get_activity_streams(
    activity_id: int,
    token_user_id: int,
    db: Session,
) -> list[
    activity_streams_schema.ActivityStreams
] | None:
    """
    Get all streams for an activity.

    Args:
        activity_id: The activity identifier.
        token_user_id: Authenticated user ID.
        db: Database session.

    Returns:
        List of activity streams or None.

    Raises:
        HTTPException: On database errors.
    """
    try:
        activity = (
            activity_crud.get_activity_by_id(
                activity_id, db
            )
        )

        if not activity:
            return None

        stmt = select(
            activity_streams_models.ActivityStreams
        ).where(
            activity_streams_models.ActivityStreams
            .activity_id == activity_id,
        )
        activity_streams = (
            db.scalars(stmt).all()
        )

        if not activity_streams:
            return None

        if token_user_id != activity.user_id:
            activity_streams = (
                activity_streams_utils
                .filter_visible_streams(
                    activity_streams, activity
                )
            )

        return [
            activity_streams_utils
            .transform_activity_streams(
                stream, activity, db
            )
            for stream in activity_streams
        ]
    except SQLAlchemyError as err:
        core_logger.print_to_log(
            "Error in get_activity_streams:"
            f" {err}",
            "error",
            exc=err,
        )
        raise HTTPException(
            status_code=(
                status
                .HTTP_500_INTERNAL_SERVER_ERROR
            ),
            detail="Internal Server Error",
        ) from err

get_public_activity_stream_by_type 

get_public_activity_stream_by_type(activity_id, stream_type, db)

Get a public stream by type for an activity.

Parameters:

Name Type Description Default
activity_id int

The activity identifier.

 required
stream_type int

The stream type constant.

 required
db Session

Database session.

 required

Returns:

Type Description
ActivityStreams | None

The activity stream or None.

Raises:

Type Description
HTTPException

On database errors.
Source code in backend/app/activities/activity_streams/crud.py 
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def get_public_activity_stream_by_type(
    activity_id: int,
    stream_type: int,
    db: Session,
) -> (
    activity_streams_schema.ActivityStreams
    | None
):
    """
    Get a public stream by type for an activity.

    Args:
        activity_id: The activity identifier.
        stream_type: The stream type constant.
        db: Database session.

    Returns:
        The activity stream or None.

    Raises:
        HTTPException: On database errors.
    """
    try:
        server_settings = (
            server_settings_utils
            .get_server_settings_or_404(db)
        )

        if not server_settings.public_shareable_links:
            return None

        activity = (
            activity_crud
            .get_activity_by_id_if_is_public(
                activity_id, db
            )
        )

        if not activity:
            return None

        stmt = (
            select(
                activity_streams_models
                .ActivityStreams
            )
            .join(
                activity_models.Activity,
                activity_models.Activity.id
                == (
                    activity_streams_models
                    .ActivityStreams.activity_id
                ),
            )
            .where(
                activity_streams_models
                .ActivityStreams.activity_id
                == activity_id,
                activity_streams_models
                .ActivityStreams.stream_type
                == stream_type,
                activity_models
                .Activity.visibility == 0,
                activity_models.Activity.id
                == activity_id,
            )
        )
        activity_stream = (
            db.scalars(stmt).first()
        )

        if not activity_stream:
            return None

        if activity_streams_utils\
                .is_stream_hidden(
            activity,
            activity_stream.stream_type,
        ):
            return None

        return (
            activity_streams_utils
            .transform_activity_streams(
                activity_stream, activity, db
            )
        )
    except SQLAlchemyError as err:
        core_logger.print_to_log(
            "Error in"
            " get_public_activity_stream"
            f"_by_type: {err}",
            "error",
            exc=err,
        )
        raise HTTPException(
            status_code=(
                status
                .HTTP_500_INTERNAL_SERVER_ERROR
            ),
            detail="Internal Server Error",
        ) from err

get_public_activity_streams 

get_public_activity_streams(activity_id, db)

Get public streams for an activity.

Parameters:

Name Type Description Default
activity_id int

The activity identifier.

 required
db Session

Database session.

 required

Returns:

Type Description
list[ActivityStreams] | None

List of activity streams or None.

Raises:

Type Description
HTTPException

On database errors.
Source code in backend/app/activities/activity_streams/crud.py 
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def get_public_activity_streams(
    activity_id: int,
    db: Session,
) -> list[
    activity_streams_schema.ActivityStreams
] | None:
    """
    Get public streams for an activity.

    Args:
        activity_id: The activity identifier.
        db: Database session.

    Returns:
        List of activity streams or None.

    Raises:
        HTTPException: On database errors.
    """
    try:
        server_settings = (
            server_settings_utils
            .get_server_settings_or_404(db)
        )

        if not server_settings.public_shareable_links:
            return None

        activity = (
            activity_crud
            .get_activity_by_id_if_is_public(
                activity_id, db
            )
        )

        if not activity:
            return None

        stmt = (
            select(
                activity_streams_models
                .ActivityStreams
            )
            .join(
                activity_models.Activity,
                activity_models.Activity.id
                == (
                    activity_streams_models
                    .ActivityStreams.activity_id
                ),
            )
            .where(
                activity_streams_models
                .ActivityStreams.activity_id
                == activity_id,
                activity_models
                .Activity.visibility == 0,
                activity_models.Activity.id
                == activity_id,
            )
        )
        activity_streams = (
            db.scalars(stmt).all()
        )

        if not activity_streams:
            return None

        activity_streams = (
            activity_streams_utils
            .filter_visible_streams(
                activity_streams, activity
            )
        )

        return [
            activity_streams_utils
            .transform_activity_streams(
                stream, activity, db
            )
            for stream in activity_streams
        ]
    except SQLAlchemyError as err:
        core_logger.print_to_log(
            "Error in"
            " get_public_activity_streams:"
            f" {err}",
            "error",
            exc=err,
        )
        raise HTTPException(
            status_code=(
                status
                .HTTP_500_INTERNAL_SERVER_ERROR
            ),
            detail="Internal Server Error",
        ) from err

is_stream_hidden 

is_stream_hidden(activity, stream_type)

Check if a stream type is hidden.

Parameters:

Name Type Description Default
activity Activity

The activity ORM instance.

 required
stream_type int

The stream type constant.

 required

Returns:

Type Description
bool

True if the stream should be hidden.
Source code in backend/app/activities/activity_streams/utils.py 
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def is_stream_hidden(
    activity: activity_models.Activity,
    stream_type: int,
) -> bool:
    """
    Check if a stream type is hidden.

    Args:
        activity: The activity ORM instance.
        stream_type: The stream type constant.

    Returns:
        True if the stream should be hidden.
    """
    attr = _STREAM_HIDE_MAP.get(stream_type)
    return bool(
        attr and getattr(activity, attr, False)
    )

transform_activity_streams 

transform_activity_streams(activity_stream, activity, db)

Transform a stream to a Pydantic schema.

Parameters:

Name Type Description Default
activity_stream ActivityStreams

The stream ORM instance.

 required
activity Activity

The activity ORM instance.

 required
db Session

Database session.

 required

Returns:

Type Description
ActivityStreams

The activity stream as a schema.
Source code in backend/app/activities/activity_streams/utils.py 
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def transform_activity_streams(
    activity_stream: (
        activity_streams_models.ActivityStreams
    ),
    activity: activity_models.Activity,
    db: Session,
) -> activity_streams_schema.ActivityStreams:
    """
    Transform a stream to a Pydantic schema.

    Args:
        activity_stream: The stream ORM instance.
        activity: The activity ORM instance.
        db: Database session.

    Returns:
        The activity stream as a schema.
    """
    if (
        activity_stream.stream_type
        == activity_streams_constants
        .STREAM_TYPE_HR
    ):
        return transform_activity_streams_hr(
            activity_stream, activity, db
        )

    return (
        activity_streams_schema.ActivityStreams
        .model_validate(activity_stream)
    )

transform_activity_streams_hr 

transform_activity_streams_hr(activity_stream, activity, db)

Calculate HR zone percentages for a stream.

Parameters:

Name Type Description Default
activity_stream ActivityStreams

The HR stream instance.

 required
activity Activity

The activity ORM instance.

 required
db Session

Database session.

 required

Returns:

Type Description
ActivityStreams

Schema with hr_zone_percentages set.
Source code in backend/app/activities/activity_streams/utils.py 
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def transform_activity_streams_hr(
    activity_stream: (
        activity_streams_models.ActivityStreams
    ),
    activity: activity_models.Activity,
    db: Session,
) -> activity_streams_schema.ActivityStreams:
    """
    Calculate HR zone percentages for a stream.

    Args:
        activity_stream: The HR stream instance.
        activity: The activity ORM instance.
        db: Database session.

    Returns:
        Schema with hr_zone_percentages set.
    """
    schema = (
        activity_streams_schema.ActivityStreams
        .model_validate(activity_stream)
    )

    waypoints = activity_stream.stream_waypoints
    if not waypoints or not isinstance(
        waypoints, list
    ):
        return schema

    detail_user = users_crud.get_user_by_id(
        activity.user_id, db
    )
    if not detail_user:
        return schema

    if detail_user.max_heart_rate:
        max_heart_rate = (
            detail_user.max_heart_rate
        )
    elif detail_user.birthdate:
        year = detail_user.birthdate.year
        current_year = datetime.datetime.now(
            datetime.timezone.utc
        ).year
        max_heart_rate = (
            220 - (current_year - year)
        )
    else:
        return schema

    zone_1 = max_heart_rate * 0.6
    zone_2 = max_heart_rate * 0.7
    zone_3 = max_heart_rate * 0.8
    zone_4 = max_heart_rate * 0.9

    hr_values = np.array(
        [
            float(wp.get("hr"))
            for wp in waypoints
            if wp.get("hr") is not None
        ]
    )

    total = len(hr_values)
    if total == 0:
        return schema

    zone_counts = [
        np.sum(hr_values < zone_1),
        np.sum(
            (hr_values >= zone_1)
            & (hr_values < zone_2)
        ),
        np.sum(
            (hr_values >= zone_2)
            & (hr_values < zone_3)
        ),
        np.sum(
            (hr_values >= zone_3)
            & (hr_values < zone_4)
        ),
        np.sum(hr_values >= zone_4),
    ]
    zone_percentages = [
        round((count / total) * 100, 2)
        for count in zone_counts
    ]

    has_timer_time = (
        hasattr(activity, "total_timer_time")
        and activity.total_timer_time
    )
    if has_timer_time:
        zone_time_seconds = [
            int(
                (percent / 100)
                * float(
                    activity.total_timer_time
                )
            )
            for percent in zone_percentages
        ]
    else:
        zone_time_seconds = [0, 0, 0, 0, 0]

    zone_hr = {
        "zone_1": f"< {int(zone_1)}",
        "zone_2": (
            f"{int(zone_1)}"
            f" - {int(zone_2) - 1}"
        ),
        "zone_3": (
            f"{int(zone_2)}"
            f" - {int(zone_3) - 1}"
        ),
        "zone_4": (
            f"{int(zone_3)}"
            f" - {int(zone_4) - 1}"
        ),
        "zone_5": f">= {int(zone_4)}",
    }
    schema.hr_zone_percentages = {
        "zone_1": {
            "percent": zone_percentages[0],
            "hr": zone_hr["zone_1"],
            "time_seconds": (
                zone_time_seconds[0]
            ),
        },
        "zone_2": {
            "percent": zone_percentages[1],
            "hr": zone_hr["zone_2"],
            "time_seconds": (
                zone_time_seconds[1]
            ),
        },
        "zone_3": {
            "percent": zone_percentages[2],
            "hr": zone_hr["zone_3"],
            "time_seconds": (
                zone_time_seconds[2]
            ),
        },
        "zone_4": {
            "percent": zone_percentages[3],
            "hr": zone_hr["zone_4"],
            "time_seconds": (
                zone_time_seconds[3]
            ),
        },
        "zone_5": {
            "percent": zone_percentages[4],
            "hr": zone_hr["zone_5"],
            "time_seconds": (
                zone_time_seconds[4]
            ),
        },
    }

    return schema