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72 lines
4.1 KiB
72 lines
4.1 KiB
import mapValues = require('lodash/mapValues');
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import {BulkColValues, ColInfo, ColInfoWithId, ColValues, DocAction} from "./DocActions";
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// TODO this replaces modelUtil's ActionDispatcher and bulkActionExpand. Those should be removed.
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/**
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* Helper class which provides a `dispatchAction` method that dispatches DocActions received from
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* the server to methods `this.on{ActionType}`, e.g. `this.onUpdateRecord`.
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*
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* Implementation methods `on*` are called with the action as the first argument, and with
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* the action arguments as additional method arguments, for convenience.
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*
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* Methods for bulk actions may be implemented directly, or will iterate through each record in
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* the action, and call the single-record methods for each one.
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*/
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export abstract class ActionDispatcher {
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public dispatchAction(action: DocAction): void {
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// In node 6 testing, this switch is 5+ times faster than looking up "on"+action[0].
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const a: any[] = action;
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switch (action[0]) {
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case "AddRecord": return this.onAddRecord (action, a[1], a[2], a[3]);
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case "UpdateRecord": return this.onUpdateRecord (action, a[1], a[2], a[3]);
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case "RemoveRecord": return this.onRemoveRecord (action, a[1], a[2]);
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case "BulkAddRecord": return this.onBulkAddRecord (action, a[1], a[2], a[3]);
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case "BulkUpdateRecord": return this.onBulkUpdateRecord(action, a[1], a[2], a[3]);
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case "BulkRemoveRecord": return this.onBulkRemoveRecord(action, a[1], a[2]);
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case "ReplaceTableData": return this.onReplaceTableData(action, a[1], a[2], a[3]);
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case "AddColumn": return this.onAddColumn (action, a[1], a[2], a[3]);
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case "RemoveColumn": return this.onRemoveColumn (action, a[1], a[2]);
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case "RenameColumn": return this.onRenameColumn (action, a[1], a[2], a[3]);
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case "ModifyColumn": return this.onModifyColumn (action, a[1], a[2], a[3]);
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case "AddTable": return this.onAddTable (action, a[1], a[2]);
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case "RemoveTable": return this.onRemoveTable (action, a[1]);
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case "RenameTable": return this.onRenameTable (action, a[1], a[2]);
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default: throw new Error(`Received unknown action ${action[0]}`);
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}
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}
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protected abstract onAddRecord(action: DocAction, tableId: string, rowId: number, colValues: ColValues): void;
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protected abstract onUpdateRecord(action: DocAction, tableId: string, rowId: number, colValues: ColValues): void;
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protected abstract onRemoveRecord(action: DocAction, tableId: string, rowId: number): void;
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// If not overridden, these will make multiple calls to single-record action methods.
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protected onBulkAddRecord(action: DocAction, tableId: string, rowIds: number[], colValues: BulkColValues): void {
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for (let i = 0; i < rowIds.length; i++) {
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this.onAddRecord(action, tableId, rowIds[i], mapValues(colValues, (values) => values[i]));
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}
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}
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protected onBulkUpdateRecord(action: DocAction, tableId: string, rowIds: number[], colValues: BulkColValues): void {
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for (let i = 0; i < rowIds.length; i++) {
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this.onUpdateRecord(action, tableId, rowIds[i], mapValues(colValues, (values) => values[i]));
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}
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}
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protected onBulkRemoveRecord(action: DocAction, tableId: string, rowIds: number[]) {
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for (const r of rowIds) {
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this.onRemoveRecord(action, tableId, r);
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}
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}
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protected abstract onReplaceTableData(
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action: DocAction, tableId: string, rowIds: number[], colValues: BulkColValues): void;
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protected abstract onAddColumn(action: DocAction, tableId: string, colId: string, colInfo: ColInfo): void;
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protected abstract onRemoveColumn(action: DocAction, tableId: string, colId: string): void;
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protected abstract onRenameColumn(action: DocAction, tableId: string, oldColId: string, newColId: string): void;
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protected abstract onModifyColumn(action: DocAction, tableId: string, colId: string, colInfo: ColInfo): void;
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protected abstract onAddTable(action: DocAction, tableId: string, columns: ColInfoWithId[]): void;
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protected abstract onRemoveTable(action: DocAction, tableId: string): void;
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protected abstract onRenameTable(action: DocAction, oldTableId: string, newTableId: string): void;
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}
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