55 lines
1.6 KiB
Go
55 lines
1.6 KiB
Go
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package types
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import (
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"encoding/json"
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"fmt"
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"time"
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)
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// A PathSegment (called Path item in the Navitia API) is a part of a path
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type PathSegment struct {
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Length uint `json:"length"` // The Length of the segment
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Name string `json:"name"` // The Name of the way corresponding to the segment
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Duration time.Duration `json:"duration"` // The duration in seconds of the segment
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// The angle in degree between the previous segment and this segment
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// = 0 Means going straight
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// < 0 Means turning left
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// > 0 Means turning right
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Direction int `json:"direction"`
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}
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// jsonPathSegment define the JSON implementation of PathSegment types
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// We define some of the value as pointers to the real values,
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// allowing us to bypass copying in cases where we don't need to process the data.
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type jsonPathSegment struct {
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// Pointers to the corresponding real values
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Length *uint
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Name *string
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Direction *int
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// Value to process
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Duration int64
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}
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// UnmarshalJSON implements json.Unmarshaller for a PathSegment
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func (ps *PathSegment) UnmarshalJSON(b []byte) error {
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data := &jsonPathSegment{
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Length: &ps.Length,
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Name: &ps.Name,
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Direction: &ps.Direction,
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}
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// Now unmarshall the raw data into the analogous structure
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err := json.Unmarshal(b, data)
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if err != nil {
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return fmt.Errorf("error while unmarshalling PathSegment: %w", err)
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}
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// Now process the value
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// As the given duration is in second, let's multiply it by one second to have the correct value
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ps.Duration = time.Duration(data.Duration) * time.Second
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return nil
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}
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