forked from MapComplete/MapComplete
93 lines
No EOL
3.7 KiB
TypeScript
93 lines
No EOL
3.7 KiB
TypeScript
import {Changes} from "../../Osm/Changes";
|
|
import {OsmNode, OsmRelation, OsmWay} from "../../Osm/OsmObject";
|
|
import FeatureSource from "../FeatureSource";
|
|
import {UIEventSource} from "../../UIEventSource";
|
|
import {ChangeDescription} from "../../Osm/Actions/ChangeDescription";
|
|
import State from "../../../State";
|
|
|
|
export class NewGeometryFromChangesFeatureSource implements FeatureSource {
|
|
// This class name truly puts the 'Java' into 'Javascript'
|
|
|
|
/**
|
|
* A feature source containing exclusively new elements
|
|
*/
|
|
public readonly features: UIEventSource<{ feature: any; freshness: Date }[]> = new UIEventSource<{ feature: any; freshness: Date }[]>([]);
|
|
public readonly name: string = "newFeatures";
|
|
|
|
constructor(changes: Changes) {
|
|
|
|
const seenChanges = new Set<ChangeDescription>();
|
|
const features = this.features.data;
|
|
const self = this;
|
|
|
|
changes.pendingChanges
|
|
.map(changes => changes.filter(ch =>
|
|
// only new objects allowed
|
|
ch.id < 0 &&
|
|
// The change is an update to the object (e.g. tags or geometry) - not the actual create
|
|
ch.changes !== undefined &&
|
|
// If tags is undefined, this is probably a new point that is part of a split road
|
|
ch.tags !== undefined &&
|
|
// Already handled
|
|
!seenChanges.has(ch)))
|
|
.addCallbackAndRunD(changes => {
|
|
if (changes.length === 0) {
|
|
return;
|
|
}
|
|
|
|
const now = new Date();
|
|
|
|
function add(feature) {
|
|
feature.id = feature.properties.id
|
|
features.push({
|
|
feature: feature,
|
|
freshness: now
|
|
})
|
|
console.warn("Added a new feature: ", JSON.stringify(feature))
|
|
}
|
|
|
|
for (const change of changes) {
|
|
seenChanges.add(change)
|
|
try {
|
|
const tags = {}
|
|
for (const kv of change.tags) {
|
|
tags[kv.k] = kv.v
|
|
}
|
|
tags["id"] = change.type + "/" + change.id
|
|
|
|
tags["_backend"] = State.state.osmConnection._oauth_config.url
|
|
|
|
switch (change.type) {
|
|
case "node":
|
|
const n = new OsmNode(change.id)
|
|
n.tags = tags
|
|
n.lat = change.changes["lat"]
|
|
n.lon = change.changes["lon"]
|
|
const geojson = n.asGeoJson()
|
|
add(geojson)
|
|
break;
|
|
case "way":
|
|
const w = new OsmWay(change.id)
|
|
w.tags = tags
|
|
w.nodes = change.changes["nodes"]
|
|
w.coordinates = change.changes["coordinates"].map(coor => [coor[1], coor[0]])
|
|
add(w.asGeoJson())
|
|
break;
|
|
case "relation":
|
|
const r = new OsmRelation(change.id)
|
|
r.tags = tags
|
|
r.members = change.changes["members"]
|
|
add(r.asGeoJson())
|
|
break;
|
|
}
|
|
} catch (e) {
|
|
console.error("Could not generate a new geometry to render on screen for:", e)
|
|
}
|
|
|
|
}
|
|
|
|
self.features.ping()
|
|
})
|
|
}
|
|
|
|
} |