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Refactor element-specific behavior out of ListModel
We do not want ListModel to specifically only work on ListElement types, or even element types in general. As such, we generalize it to a list of some kind of elements with some kind of ID, even if these are not types that would be stored remotely as part of the model. Co-authored-by: hrb-hub <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,178 @@ | ||
| import { ListFilter, ListModel, ListModelConfig } from "./ListModel" | ||
| import { getElementId, isSameId, ListElement } from "../api/common/utils/EntityUtils" | ||
| import { OperationType } from "../api/common/TutanotaConstants" | ||
| import Stream from "mithril/stream" | ||
| import { ListLoadingState, ListState } from "../gui/base/List" | ||
|
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| export type ListElementListModelConfig<ElementType> = Omit<ListModelConfig<ElementType, Id>, "getElementId" | "isSameId"> | ||
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| export class ListElementListModel<ElementType extends ListElement> { | ||
| private readonly listModel: ListModel<ElementType, Id> | ||
| private readonly config: ListModelConfig<ElementType, Id> | ||
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| get state(): ListState<ElementType> { | ||
| return this.listModel.state | ||
| } | ||
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| get differentItemsSelected(): Stream<ReadonlySet<ElementType>> { | ||
| return this.listModel.differentItemsSelected | ||
| } | ||
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| get stateStream(): Stream<ListState<ElementType>> { | ||
| return this.listModel.stateStream | ||
| } | ||
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| constructor(config: ListElementListModelConfig<ElementType>) { | ||
| this.config = Object.assign({}, config, { | ||
| isSameId, | ||
| getElementId, | ||
| }) | ||
| this.listModel = new ListModel(this.config) | ||
| } | ||
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| async entityEventReceived(listId: Id, elementId: Id, operation: OperationType): Promise<void> { | ||
| if (operation === OperationType.CREATE || operation === OperationType.UPDATE) { | ||
| // load the element without range checks for now | ||
| const entity = await this.config.loadSingle(listId, elementId) | ||
| if (!entity) { | ||
| return | ||
| } | ||
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| // Wait for any pending loading | ||
| return this.listModel.waitLoad(() => { | ||
| if (operation === OperationType.CREATE) { | ||
| if (this.canCreateEntity(entity)) { | ||
| this.listModel.addToLoadedEntities(entity) | ||
| } | ||
| } else if (operation === OperationType.UPDATE) { | ||
| this.listModel.updateLoadedEntity(entity) | ||
| } | ||
| }) | ||
| } else if (operation === OperationType.DELETE) { | ||
| // await this.swipeHandler?.animating | ||
| await this.listModel.deleteLoadedEntity(elementId) | ||
| } | ||
| } | ||
|
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| private canCreateEntity(entity: ElementType): boolean { | ||
| if (this.state.loadingStatus !== ListLoadingState.Done) { | ||
| return false | ||
| } | ||
|
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| // new element is in the loaded range or newer than the first element | ||
| const lastElement = this.listModel.getLastElement() | ||
| return lastElement != null && this.config.sortCompare(entity, lastElement) < 0 | ||
| } | ||
|
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| async loadAndSelect( | ||
| itemId: Id, | ||
| shouldStop: () => boolean, | ||
| finder: (a: ElementType) => boolean = (item) => this.config.isSameId(this.config.getElementId(item), itemId), | ||
| ): Promise<ElementType | null> { | ||
| return this.listModel.loadAndSelect(itemId, shouldStop, finder) | ||
| } | ||
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| isItemSelected(itemId: Id): boolean { | ||
| return this.listModel.isItemSelected(itemId) | ||
| } | ||
|
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| enterMultiselect() { | ||
| return this.listModel.enterMultiselect() | ||
| } | ||
|
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| stopLoading(): void { | ||
| return this.listModel.stopLoading() | ||
| } | ||
|
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| isEmptyAndDone(): boolean { | ||
| return this.listModel.isEmptyAndDone() | ||
| } | ||
|
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| isSelectionEmpty(): boolean { | ||
| return this.listModel.isSelectionEmpty() | ||
| } | ||
|
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| getUnfilteredAsArray(): Array<ElementType> { | ||
| return this.listModel.getUnfilteredAsArray() | ||
| } | ||
|
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| sort() { | ||
| return this.listModel.sort() | ||
| } | ||
|
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| async loadMore() { | ||
| return this.listModel.loadMore() | ||
| } | ||
|
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| async loadAll() { | ||
| return this.listModel.loadAll() | ||
| } | ||
|
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| async retryLoading() { | ||
| return this.listModel.retryLoading() | ||
| } | ||
|
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| onSingleSelection(item: ElementType) { | ||
| return this.listModel.onSingleSelection(item) | ||
| } | ||
|
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| onSingleInclusiveSelection(item: ElementType, clearSelectionOnMultiSelectStart?: boolean) { | ||
| return this.listModel.onSingleInclusiveSelection(item, clearSelectionOnMultiSelectStart) | ||
| } | ||
|
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| onSingleExclusiveSelection(item: ElementType) { | ||
| return this.listModel.onSingleExclusiveSelection(item) | ||
| } | ||
|
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| selectRangeTowards(item: ElementType) { | ||
| return this.listModel.selectRangeTowards(item) | ||
| } | ||
|
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| areAllSelected(): boolean { | ||
| return this.listModel.areAllSelected() | ||
| } | ||
|
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| selectNone() { | ||
| return this.listModel.selectNone() | ||
| } | ||
|
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| selectAll() { | ||
| return this.listModel.selectAll() | ||
| } | ||
|
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| selectPrevious(multiselect: boolean) { | ||
| return this.listModel.selectPrevious(multiselect) | ||
| } | ||
|
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| selectNext(multiselect: boolean) { | ||
| return this.listModel.selectNext(multiselect) | ||
| } | ||
|
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| cancelLoadAll() { | ||
| return this.listModel.cancelLoadAll() | ||
| } | ||
|
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| async loadInitial() { | ||
| return this.listModel.loadInitial() | ||
| } | ||
|
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| reapplyFilter() { | ||
| return this.listModel.reapplyFilter() | ||
| } | ||
|
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| setFilter(filter: ListFilter<ElementType> | null) { | ||
| return this.listModel.setFilter(filter) | ||
| } | ||
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| getSelectedAsArray(): Array<ElementType> { | ||
| return this.listModel.getSelectedAsArray() | ||
| } | ||
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| isLoadedCompletely(): boolean { | ||
| return this.listModel.isLoadedCompletely() | ||
| } | ||
|
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| updateLoadingStatus(status: ListLoadingState) { | ||
| return this.listModel.updateLoadingStatus(status) | ||
| } | ||
| } |
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