230 lines
10 KiB
Go
230 lines
10 KiB
Go
package summarize
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import (
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"context"
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"fmt"
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"strings"
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"github.com/jackc/pgx/v4"
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"hg.lukegb.com/lukegb/depot/go/trains/webapi"
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)
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type Querier interface {
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Query(ctx context.Context, sql string, args ...interface{}) (pgx.Rows, error)
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QueryRow(ctx context.Context, sql string, args ...interface{}) pgx.Row
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}
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func serviceWhere(ctx context.Context, pc Querier, limit int, where string, params ...interface{}) ([]*webapi.ServiceData, error) {
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rows, err := pc.Query(ctx, `
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SELECT
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ts.id, ts.rid, ts.uid, ts.rsid, ts.headcode, ts.scheduled_start_date::varchar,
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ts.train_operator, COALESCE(rop.name, ''), COALESCE(rop.url, ''),
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COALESCE(ts.delay_reason_code::int, 0), COALESCE(rlr.text, ''), COALESCE(ts.delay_reason_tiploc, ''), COALESCE(rlrloc.name, ''), COALESCE(rlrloc.crs, ''), COALESCE(rlrloc.toc, ''), COALESCE(rlrop.name, ''), COALESCE(rlrop.url, ''), COALESCE(ts.delay_reason_tiploc_near, false),
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COALESCE(ts.cancellation_reason_code::int, 0), COALESCE(rlr.text, ''), COALESCE(ts.cancellation_reason_tiploc, ''), COALESCE(rlrloc.name, ''), COALESCE(rlrloc.crs, ''), COALESCE(rlrloc.toc, ''), COALESCE(rlrop.name, ''), COALESCE(rlrop.url, ''), COALESCE(ts.cancellation_reason_tiploc_near, false),
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ts.active, ts.deleted, ts.cancelled
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FROM
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train_services ts
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LEFT JOIN ref_tocs rop ON rop.toc=ts.train_operator
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LEFT JOIN ref_late_running_reasons rlr ON rlr.code=ts.delay_reason_code::int
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LEFT JOIN ref_locations rlrloc ON rlrloc.tiploc=ts.delay_reason_tiploc
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LEFT JOIN ref_tocs rlrop ON rlrop.toc=rlrloc.toc
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LEFT JOIN ref_cancel_reasons rc ON rc.code=ts.cancellation_reason_code::int
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LEFT JOIN ref_locations rcloc ON rcloc.tiploc=ts.cancellation_reason_tiploc
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LEFT JOIN ref_tocs rcop ON rcop.toc=rcloc.toc
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WHERE
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`+where+fmt.Sprintf(`
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ORDER BY ts.id
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LIMIT %d`, limit), params...)
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if err != nil {
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return nil, fmt.Errorf("querying for services: %w", err)
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}
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defer rows.Close()
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var sds []*webapi.ServiceData
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sdMap := make(map[uint64]*webapi.ServiceData)
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for rows.Next() {
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sd := &webapi.ServiceData{
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DelayReason: &webapi.DisruptionReason{Location: &webapi.Location{Operator: &webapi.TrainOperator{}}},
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CancelReason: &webapi.DisruptionReason{Location: &webapi.Location{Operator: &webapi.TrainOperator{}}},
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Operator: &webapi.TrainOperator{},
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}
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if err := rows.Scan(
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&sd.Id, &sd.Rid, &sd.Uid, &sd.Rsid, &sd.Headcode, &sd.ScheduledStartDate,
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&sd.Operator.Code, &sd.Operator.Name, &sd.Operator.Url,
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&sd.DelayReason.Code, &sd.DelayReason.Text, &sd.DelayReason.Location.Tiploc, &sd.DelayReason.Location.Name, &sd.DelayReason.Location.Crs, &sd.DelayReason.Location.Operator.Code, &sd.DelayReason.Location.Operator.Name, &sd.DelayReason.Location.Operator.Url, &sd.DelayReason.NearLocation,
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&sd.CancelReason.Code, &sd.CancelReason.Text, &sd.CancelReason.Location.Tiploc, &sd.CancelReason.Location.Name, &sd.CancelReason.Location.Crs, &sd.CancelReason.Location.Operator.Code, &sd.CancelReason.Location.Operator.Name, &sd.CancelReason.Location.Operator.Url, &sd.CancelReason.NearLocation,
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&sd.IsActive, &sd.IsDeleted, &sd.IsCancelled,
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); err != nil {
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return nil, fmt.Errorf("reading from train_services: %w", err)
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}
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sd.Canonicalize()
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sds = append(sds, sd)
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sdMap[sd.Id] = sd
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}
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if rows.Err() != nil {
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return nil, fmt.Errorf("reading rows for services: %w", err)
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}
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rows.Close()
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if len(sds) == 0 {
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return nil, nil
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}
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var idsStrs []string
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for id := range sdMap {
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idsStrs = append(idsStrs, fmt.Sprintf("%d", id))
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}
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// Now for the locations.
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rows, err = pc.Query(ctx, fmt.Sprintf(`
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SELECT
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tl.tsid, tl.id,
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tl.tiploc, COALESCE(rloc.name, ''), COALESCE(rloc.crs, ''), COALESCE(rloc.toc, ''), COALESCE(rloctoc.name, ''), COALESCE(rloctoc.url, ''),
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tl.calling_point::varchar, COALESCE(tl.train_length, 0), tl.service_suppressed,
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tl.schedule_cancelled,
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COALESCE(tl.schedule_platform, ''), COALESCE(tl.platform, ''), COALESCE(tl.platform_confirmed, false), COALESCE(tl.platform_suppressed, false),
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tl.schedule_false_destination_tiploc, COALESCE(rfdloc.name, ''), COALESCE(rfdloc.crs, ''), COALESCE(rfdloc.toc, ''), COALESCE(rfdloctoc.name, ''), COALESCE(rfdloctoc.url, ''),
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tl.schedule_public_arrival, tl.schedule_working_arrival, tl.estimated_arrival, tl.working_estimated_arrival, tl.actual_arrival,
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tl.schedule_public_departure, tl.schedule_working_departure, tl.estimated_departure, tl.working_estimated_departure, tl.actual_departure,
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/* no public_pass */ tl.schedule_working_pass, tl.estimated_pass, tl.working_estimated_pass, tl.actual_pass
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FROM
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train_locations tl
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LEFT JOIN ref_locations rloc ON rloc.tiploc=tl.tiploc
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LEFT JOIN ref_tocs rloctoc ON rloctoc.toc=rloc.toc
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LEFT JOIN ref_locations rfdloc ON rfdloc.tiploc=tl.schedule_false_destination_tiploc
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LEFT JOIN ref_tocs rfdloctoc ON rfdloctoc.toc=rfdloc.toc
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WHERE
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tl.tsid IN (%s) AND tl.active_in_schedule
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ORDER BY
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tl.tsid, COALESCE(tl.schedule_working_arrival, tl.schedule_working_pass, tl.schedule_working_departure)
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`, strings.Join(idsStrs, ",")))
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if err != nil {
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return nil, fmt.Errorf("querying locations: %w", err)
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}
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defer rows.Close()
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for rows.Next() {
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var tsid uint64
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loc := webapi.ServiceLocation{
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Location: &webapi.Location{Operator: &webapi.TrainOperator{}},
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Platform: &webapi.PlatformData{},
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FalseDestination: &webapi.Location{Operator: &webapi.TrainOperator{}},
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ArrivalTiming: &webapi.TimingData{PublicScheduled: &webapi.DateTime{}, WorkingScheduled: &webapi.DateTime{}, PublicEstimated: &webapi.DateTime{}, WorkingEstimated: &webapi.DateTime{}, Actual: &webapi.DateTime{}},
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DepartureTiming: &webapi.TimingData{PublicScheduled: &webapi.DateTime{}, WorkingScheduled: &webapi.DateTime{}, PublicEstimated: &webapi.DateTime{}, WorkingEstimated: &webapi.DateTime{}, Actual: &webapi.DateTime{}},
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PassTiming: &webapi.TimingData{PublicScheduled: &webapi.DateTime{}, WorkingScheduled: &webapi.DateTime{}, PublicEstimated: &webapi.DateTime{}, WorkingEstimated: &webapi.DateTime{}, Actual: &webapi.DateTime{}},
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}
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if err := rows.Scan(
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&tsid, &loc.Id,
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&loc.Location.Tiploc, &loc.Location.Name, &loc.Location.Crs, &loc.Location.Operator.Code, &loc.Location.Operator.Name, &loc.Location.Operator.Url,
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&loc.CallingPointType, &loc.TrainLength, &loc.ServiceSuppressed,
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&loc.Cancelled,
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&loc.Platform.Scheduled, &loc.Platform.Live, &loc.Platform.Confirmed, &loc.Platform.Suppressed,
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&loc.FalseDestination.Tiploc, &loc.FalseDestination.Name, &loc.FalseDestination.Crs, &loc.FalseDestination.Operator.Code, &loc.FalseDestination.Operator.Name, &loc.FalseDestination.Operator.Url,
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loc.ArrivalTiming.PublicScheduled, loc.ArrivalTiming.WorkingScheduled, loc.ArrivalTiming.PublicEstimated, loc.ArrivalTiming.WorkingEstimated, loc.ArrivalTiming.Actual,
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loc.DepartureTiming.PublicScheduled, loc.DepartureTiming.WorkingScheduled, loc.DepartureTiming.PublicEstimated, loc.DepartureTiming.WorkingEstimated, loc.DepartureTiming.Actual,
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/*loc.PassTiming.PublicScheduled,*/ loc.PassTiming.WorkingScheduled, loc.PassTiming.PublicEstimated, loc.PassTiming.WorkingEstimated, loc.PassTiming.Actual,
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); err != nil {
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return nil, fmt.Errorf("scanning locations: %w", err)
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}
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loc.Canonicalize()
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sd := sdMap[tsid]
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sd.Locations = append(sd.Locations, &loc)
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}
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if rows.Err() != nil {
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return nil, fmt.Errorf("iterating over locations: %w", rows.Err())
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}
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return sds, nil
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}
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func Service(ctx context.Context, pc Querier, id int) (*webapi.ServiceData, error) {
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sds, err := serviceWhere(ctx, pc, 2, "ts.id=$1", id)
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if err != nil {
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return nil, fmt.Errorf("query for service %d: %w", id, err)
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}
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if len(sds) != 1 {
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return nil, fmt.Errorf("query for service %d returned %d services: %w", id, len(sds), err)
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}
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return sds[0], nil
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}
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func ListServices(ctx context.Context, pc Querier, req *webapi.ListServicesRequest) ([]*webapi.ServiceData, error) {
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var wheres []string
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var vars []interface{}
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addVar := func(x interface{}) string {
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vars = append(vars, x)
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return fmt.Sprintf("$%d", len(vars))
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}
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addVars := func(xs ...interface{}) string {
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xvars := make([]string, len(xs))
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for n, x := range xs {
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xvars[n] = addVar(x)
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}
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return strings.Join(xvars, ",")
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}
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if req.GetRid() != "" {
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wheres = append(wheres, fmt.Sprintf("ts.rid=%s", addVar(req.GetRid())))
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}
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if req.GetUid() != "" {
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wheres = append(wheres, fmt.Sprintf("ts.uid=%s", addVar(req.GetUid())))
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}
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if req.GetHeadcode() != "" {
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wheres = append(wheres, fmt.Sprintf("ts.headcode=%s", addVar(req.GetHeadcode())))
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}
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if req.GetScheduledStartDate() != "" {
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wheres = append(wheres, fmt.Sprintf("ts.scheduled_start_date::varchar=%s", addVar(req.GetScheduledStartDate())))
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}
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if req.GetTrainOperatorCode() != "" {
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wheres = append(wheres, fmt.Sprintf("ts.train_operator=%s", addVar(req.GetTrainOperatorCode())))
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}
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addLocation := func(lr *webapi.LocationRequest, passingPointType ...interface{}) error {
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if lr == nil {
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return nil
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}
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var subwheres []string
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var specified bool
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if lr.GetTiploc() != "" {
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subwheres = append(subwheres, fmt.Sprintf("tl.tiploc=%s", addVar(lr.GetTiploc())))
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specified = true
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}
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if lr.GetCrs() != "" {
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subwheres = append(subwheres, fmt.Sprintf("rl.crs=%s AND rl.crs IS NOT NULL", addVar(lr.GetCrs())))
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specified = true
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}
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if !specified {
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return fmt.Errorf("must specify either tiploc or crs")
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}
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if !lr.GetIncludeInPast() {
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subwheres = append(subwheres, "COALESCE(tl.actual_departure, tl.actual_pass, tl.estimated_departure, tl.estimated_pass, tl.working_estimated_departure, tl.working_estimated_pass) > CURRENT_TIMESTAMP")
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}
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wheres = append(wheres, fmt.Sprintf("ts.id IN (SELECT tl.tsid FROM train_locations tl LEFT JOIN ref_locations rl ON rl.tiploc=tl.tiploc WHERE tl.calling_point IN (%s) AND %s)", addVars(passingPointType...), strings.Join(subwheres, " AND ")))
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return nil
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}
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if err := addLocation(req.GetOrigin(), "OR"); err != nil {
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return nil, fmt.Errorf("origin: %w", err)
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}
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if err := addLocation(req.GetDestination(), "DT"); err != nil {
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return nil, fmt.Errorf("destination: %w", err)
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}
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if err := addLocation(req.GetCallingAt(), "OR", "DT", "IP"); err != nil {
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return nil, fmt.Errorf("calling_at: %w", err)
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}
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if err := addLocation(req.GetPassing(), "OR", "DT", "IP", "PP", "OPIP", "OPOR", "OPDT"); err != nil {
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return nil, fmt.Errorf("passing: %w", err)
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}
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if !req.GetIncludeDeleted() {
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wheres = append(wheres, "NOT ts.deleted")
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}
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limit := req.GetMaxResults()
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if limit == 0 || limit > 100 {
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limit = 100
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}
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return serviceWhere(ctx, pc, int(limit), strings.Join(wheres, " AND "), vars...)
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}
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