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Stabilize popup

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This commit is contained in:
Pieter Vander Vennet 2021-05-07 01:43:32 +02:00
parent 729f28fbf5
commit 292bad5df7
6 changed files with 74 additions and 45 deletions
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43
Logic/FeatureSource/FeatureSourceMerger.ts
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@ -21,27 +21,48 @@ export default class FeatureSourceMerger implements FeatureSource {
}
private Update() {
let all = {}; // Mapping 'id' -> {feature, freshness}
let somethingChanged = false;
const all: Map<string, { feature: any, freshness: Date }> = new Map<string, { feature: any; freshness: Date }>();
// We seed the dictionary with the previously loaded features
const oldValues = this.features.data ?? [];
for (const oldValue of oldValues) {
all.set(oldValue.feature.id, oldValue)
}
for (const source of this._sources) {
if (source?.features?.data === undefined) {
continue;
}
for (const f of source.features.data) {
const id = f.feature.properties.id;
const oldV = all[id];
if (oldV === undefined) {
all[id] = f;
} else {
if (oldV.freshness < f.freshness) {
all[id] = f;
}
if (!all.has(id)) {
// This is a new feature
somethingChanged = true;
all.set(id, f);
continue;
}
// This value has been seen already, either in a previous run or by a previous datasource
// Let's figure out if something changed
const oldV = all.get(id);
if (oldV.freshness < f.freshness) {
// Jup, this feature is fresher
all.set(id, f);
somethingChanged = true;
}
}
}
const newList = [];
for (const id in all) {
newList.push(all[id]);
if(!somethingChanged){
// We don't bother triggering an update
return;
}
const newList = [];
all.forEach((value, key) => {
newList.push(value)
})
this.features.setData(newList);
}