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Support updater in MappedMap

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Signed-off-by: RMidhunSuresh <rmidhunsuresh@gmail.com>
This commit is contained in:
RMidhunSuresh 2021-06-22 17:33:15 +05:30
parent 0819dcb29e
commit f41c835e91
2 changed files with 5 additions and 3 deletions
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4
src/observable/index.js
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@ -34,8 +34,8 @@ Object.assign(BaseObservableMap.prototype, {
return new SortedMapList(this, comparator);
},
mapValues(mapper) {
return new MappedMap(this, mapper);
mapValues(mapper, updater) {
return new MappedMap(this, mapper, updater);
},
filterValues(filter) {

4
src/observable/map/MappedMap.js
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@ -20,10 +20,11 @@ so a mapped value can emit updates on it's own with this._emitSpontaneousUpdate
how should the mapped value be notified of an update though? and can it then decide to not propagate the update?
*/
export class MappedMap extends BaseObservableMap {
constructor(source, mapper) {
constructor(source, mapper, updater) {
super();
this._source = source;
this._mapper = mapper;
this._updater = updater;
this._mappedValues = new Map();
}
@ -55,6 +56,7 @@ export class MappedMap extends BaseObservableMap {
}
const mappedValue = this._mappedValues.get(key);
if (mappedValue !== undefined) {
this._updater?.(mappedValue, params, value);
// TODO: map params somehow if needed?
this.emitUpdate(key, mappedValue, params);
}