63 lines
2.1 KiB
MySQL
63 lines
2.1 KiB
MySQL
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-- 003_trips_for_day_rpc.sql
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-- Returns one row per trip on p_date, with the path reconstructed from
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-- tracksolid.position_history points falling inside the trip window.
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--
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-- path_geojson : LineString GeoJSON, deck.gl reads {type, coordinates} directly.
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-- timestamps_rel: integer seconds elapsed since trip start, one per vertex.
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-- Frontend offsets these to "seconds since 00:00 of selected date"
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-- so a single TripsLayer can animate every trip on one timeline.
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--
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-- HAVING count >= 2 drops trips with too few points to draw a line (rare,
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-- but happens for very short trips that started/ended between GPS pings).
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CREATE OR REPLACE FUNCTION public.trips_for_day(
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p_date date,
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p_cost_centres text[] DEFAULT NULL
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) RETURNS TABLE (
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trip_id bigint,
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imei text,
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vehicle_name text,
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vehicle_number text,
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cost_centre text,
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start_time timestamptz,
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end_time timestamptz,
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distance_km numeric,
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path_geojson json,
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timestamps_rel int[]
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)
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LANGUAGE sql STABLE
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SECURITY DEFINER
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SET search_path = public, tracksolid
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AS $$
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WITH day_trips AS (
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SELECT v.*
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FROM public.trips_viz_v1 v
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WHERE v.start_time::date = p_date
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AND (p_cost_centres IS NULL OR v.cost_centre = ANY(p_cost_centres))
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)
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SELECT
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dt.trip_id,
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dt.imei,
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dt.vehicle_name,
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dt.vehicle_number,
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dt.cost_centre,
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dt.start_time,
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dt.end_time,
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dt.distance_km,
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ST_AsGeoJSON(ST_MakeLine(ph.geom ORDER BY ph.gps_time))::json AS path_geojson,
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array_agg(
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EXTRACT(EPOCH FROM ph.gps_time - dt.start_time)::int
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ORDER BY ph.gps_time
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) AS timestamps_rel
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FROM day_trips dt
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JOIN tracksolid.position_history ph
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ON ph.imei = dt.imei
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AND ph.gps_time BETWEEN dt.start_time AND dt.end_time
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AND ph.geom IS NOT NULL
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GROUP BY dt.trip_id, dt.imei, dt.vehicle_name, dt.vehicle_number,
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dt.cost_centre, dt.start_time, dt.end_time, dt.distance_km
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HAVING count(ph.geom) >= 2;
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$$;
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GRANT EXECUTE ON FUNCTION public.trips_for_day(date, text[]) TO viz_anon;
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