mirror of https://github.com/tidwall/tile38.git
77 lines
1.6 KiB
Go
77 lines
1.6 KiB
Go
package geojson
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import (
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"strings"
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"github.com/tidwall/gjson"
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)
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// FeatureCollection ...
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type FeatureCollection struct{ collection }
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// NewFeatureCollection ...
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func NewFeatureCollection(features []Object) *FeatureCollection {
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g := new(FeatureCollection)
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g.children = features
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g.parseInitRectIndex(DefaultParseOptions)
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return g
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}
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// AppendJSON appends the GeoJSON reprensentation to dst
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func (g *FeatureCollection) AppendJSON(dst []byte) []byte {
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dst = append(dst, `{"type":"FeatureCollection","features":[`...)
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for i := 0; i < len(g.children); i++ {
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if i > 0 {
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dst = append(dst, ',')
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}
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dst = g.children[i].AppendJSON(dst)
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}
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dst = append(dst, ']')
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if g.extra != nil {
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dst = g.extra.appendJSONExtra(dst)
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}
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dst = append(dst, '}')
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strings.Index("", " ")
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return dst
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}
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// String ...
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func (g *FeatureCollection) String() string {
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return string(g.AppendJSON(nil))
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}
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// JSON ...
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func (g *FeatureCollection) JSON() string {
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return string(g.AppendJSON(nil))
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}
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func parseJSONFeatureCollection(
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keys *parseKeys, opts *ParseOptions,
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) (Object, error) {
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var g FeatureCollection
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if !keys.rFeatures.Exists() {
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return nil, errFeaturesMissing
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}
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if !keys.rFeatures.IsArray() {
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return nil, errFeaturesInvalid
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}
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var err error
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keys.rFeatures.ForEach(func(key, value gjson.Result) bool {
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var f Object
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f, err = Parse(value.Raw, opts)
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if err != nil {
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return false
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}
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g.children = append(g.children, f)
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return true
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})
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if err != nil {
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return nil, err
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}
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if err := parseBBoxAndExtras(&g.extra, keys, opts); err != nil {
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return nil, err
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}
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g.parseInitRectIndex(opts)
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return &g, nil
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}
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