forked from MapComplete/MapComplete
89 lines
2.7 KiB
TypeScript
89 lines
2.7 KiB
TypeScript
import FeatureSource, {FeatureSourceForLayer, Tiled} from "../FeatureSource"
|
|
import {ImmutableStore, Store} from "../../UIEventSource"
|
|
import FilteredLayer from "../../../Models/FilteredLayer"
|
|
import {BBox} from "../../BBox"
|
|
import {Feature} from "geojson";
|
|
|
|
/**
|
|
* A simple, read only feature store.
|
|
*/
|
|
export default class StaticFeatureSource implements FeatureSource {
|
|
public readonly features: Store<{ feature: any; freshness: Date }[]>
|
|
public readonly name: string
|
|
|
|
constructor(
|
|
features: Store<{ feature: Feature; freshness: Date }[]>,
|
|
name = "StaticFeatureSource"
|
|
) {
|
|
if (features === undefined) {
|
|
throw "Static feature source received undefined as source"
|
|
}
|
|
this.name = name
|
|
this.features = features
|
|
}
|
|
|
|
public static fromGeojsonAndDate(
|
|
features: { feature: Feature; freshness: Date }[],
|
|
name = "StaticFeatureSourceFromGeojsonAndDate"
|
|
): StaticFeatureSource {
|
|
return new StaticFeatureSource(new ImmutableStore(features), name)
|
|
}
|
|
|
|
public static fromGeojson(
|
|
geojson: Feature[],
|
|
name = "StaticFeatureSourceFromGeojson"
|
|
): StaticFeatureSource {
|
|
const now = new Date()
|
|
return StaticFeatureSource.fromGeojsonAndDate(
|
|
geojson.map((feature) => ({ feature, freshness: now })),
|
|
name
|
|
)
|
|
}
|
|
|
|
public static fromGeojsonStore(
|
|
geojson: Store<Feature[]>,
|
|
name = "StaticFeatureSourceFromGeojson"
|
|
): StaticFeatureSource {
|
|
const now = new Date()
|
|
const mapped: Store<{ feature: Feature; freshness: Date }[]> = geojson.map((features) =>
|
|
features.map((feature) => ({ feature, freshness: now }))
|
|
)
|
|
return new StaticFeatureSource(mapped, name)
|
|
}
|
|
|
|
static fromDateless(
|
|
featureSource: Store<{ feature: Feature }[]>,
|
|
name = "StaticFeatureSourceFromDateless"
|
|
) {
|
|
const now = new Date()
|
|
return new StaticFeatureSource(
|
|
featureSource.map((features) =>
|
|
features.map((feature) => ({
|
|
feature: feature.feature,
|
|
freshness: now,
|
|
}))
|
|
),
|
|
name
|
|
)
|
|
}
|
|
}
|
|
|
|
export class TiledStaticFeatureSource
|
|
extends StaticFeatureSource
|
|
implements Tiled, FeatureSourceForLayer
|
|
{
|
|
public readonly bbox: BBox = BBox.global
|
|
public readonly tileIndex: number
|
|
public readonly layer: FilteredLayer
|
|
|
|
constructor(
|
|
features: Store<{ feature: any; freshness: Date }[]>,
|
|
layer: FilteredLayer,
|
|
tileIndex: number = 0
|
|
) {
|
|
super(features)
|
|
this.tileIndex = tileIndex
|
|
this.layer = layer
|
|
this.bbox = BBox.fromTileIndex(this.tileIndex)
|
|
}
|
|
}
|