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52 lines
1.7 KiB
52 lines
1.7 KiB
import { AlternateActions, AlternateStorage, ProcessedAction} from 'app/common/AlternateActions';
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import { DocAction, UserAction } from 'app/common/DocActions';
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import { DocData } from 'app/common/DocData';
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import max from 'lodash/max';
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/**
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* An implementation of an in-memory storage that can handle UserActions,
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* generating DocActions and retValues that work as for regular storage.
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* It shares an implementation with on-demand tables.
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*/
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export class DocDataCache implements AlternateStorage {
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public docData: DocData;
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private _altActions: AlternateActions;
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constructor(actions?: DocAction[]) {
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this.docData = new DocData(
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async (tableId) => {
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throw new Error(`no ${tableId}`);
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},
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null,
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);
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this._altActions = new AlternateActions(this);
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for (const action of actions || []) {
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this.docData.receiveAction(action);
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}
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}
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public async sendTableActions(actions: UserAction[]): Promise<ProcessedAction[]> {
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const results: ProcessedAction[] = [];
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for (const userAction of actions) {
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const processedAction = await this._altActions.processUserAction(userAction);
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results.push(processedAction);
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for (const storedAction of processedAction.stored) {
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this.docData.receiveAction(storedAction);
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}
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}
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return results;
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}
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public async fetchActionData(tableId: string, rowIds: number[], colIds?: string[]) {
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const table = await this.docData.requireTable(tableId);
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return table.getTableDataAction(
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rowIds,
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colIds,
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);
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}
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public async getNextRowId(tableId: string): Promise<number> {
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const table = await this.docData.requireTable(tableId);
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return (max(table.getRowIds()) || 0) + 1;
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}
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}
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