Preprocess camera ingress-egress timestamps

Converts paired ingress and egress POSIXct timestamps into a data frame of daily angler-effort hours, suitable for passing to add_counts. Duration for each pair is computed as difftime(egress_col, ingress_col, units = "hours"). Pairs where egress precedes ingress (negative duration) are flagged with cli_warn and excluded from the daily sum (set to NA).

Usage

preprocess_camera_timestamps(timestamps, date_col, ingress_col, egress_col)

Arguments

timestamps

A data frame containing the ingress-egress records.

date_col

Tidy selector for the date column (Date or POSIXct).

ingress_col

Tidy selector for the ingress timestamp column (POSIXct).

egress_col

Tidy selector for the egress timestamp column (POSIXct).

Value

A data frame with columns date and daily_effort_hours (one row per unique date, effort hours summed across all valid pairs for that date).

Details

Preprocess camera ingress-egress timestamps to daily effort hours