gristlabs_grist-core/app/client/models/DocModel.ts

209 lines
10 KiB
TypeScript
Raw Normal View History

/**
* DocModel describes the observable models for all document data, including the built-in tables
* (aka metatables), which are used in the Grist application itself (e.g. to render views).
*
* Since all data is structured as tables, we have several levels of models:
* (1) DocModel maintains all tables
* (2) MetaTableModel maintains data for a built-in table.
* (3) DataTableModel maintains data for a user-defined table.
* (4) RowModels (defined in {Data,Meta}TableModel.js) maintains data for one record in a table.
* For built-in tables, the records are defined in this module, below.
*/
import {KoArray} from 'app/client/lib/koArray';
import {KoSaveableObservable} from 'app/client/models/modelUtil';
import * as ko from 'knockout';
import * as koArray from 'app/client/lib/koArray';
import * as koUtil from 'app/client/lib/koUtil';
import * as DataTableModel from 'app/client/models/DataTableModel';
import {DocData} from 'app/client/models/DocData';
import * as MetaRowModel from 'app/client/models/MetaRowModel';
import * as MetaTableModel from 'app/client/models/MetaTableModel';
import * as rowset from 'app/client/models/rowset';
import {RowId} from 'app/client/models/rowset';
import {schema, SchemaTypes} from 'app/common/schema';
import {ACLRuleRec, createACLRuleRec} from 'app/client/models/entities/ACLRuleRec';
import {ColumnRec, createColumnRec} from 'app/client/models/entities/ColumnRec';
import {createDocInfoRec, DocInfoRec} from 'app/client/models/entities/DocInfoRec';
import {createPageRec, PageRec} from 'app/client/models/entities/PageRec';
import {createTabBarRec, TabBarRec} from 'app/client/models/entities/TabBarRec';
import {createTableRec, TableRec} from 'app/client/models/entities/TableRec';
import {createTableViewRec, TableViewRec} from 'app/client/models/entities/TableViewRec';
import {createValidationRec, ValidationRec} from 'app/client/models/entities/ValidationRec';
import {createViewFieldRec, ViewFieldRec} from 'app/client/models/entities/ViewFieldRec';
import {createViewRec, ViewRec} from 'app/client/models/entities/ViewRec';
import {createViewSectionRec, ViewSectionRec} from 'app/client/models/entities/ViewSectionRec';
// Re-export all the entity types available. The recommended usage is like this:
// import {ColumnRec, ViewFieldRec} from 'app/client/models/DocModel';
export {ColumnRec} from 'app/client/models/entities/ColumnRec';
export {DocInfoRec} from 'app/client/models/entities/DocInfoRec';
export {PageRec} from 'app/client/models/entities/PageRec';
export {TabBarRec} from 'app/client/models/entities/TabBarRec';
export {TableRec} from 'app/client/models/entities/TableRec';
export {TableViewRec} from 'app/client/models/entities/TableViewRec';
export {ValidationRec} from 'app/client/models/entities/ValidationRec';
export {ViewFieldRec} from 'app/client/models/entities/ViewFieldRec';
export {ViewRec} from 'app/client/models/entities/ViewRec';
export {ViewSectionRec} from 'app/client/models/entities/ViewSectionRec';
/**
* Creates the type for a MetaRowModel containing a KoSaveableObservable for each field listed in
* the auto-generated app/common/schema.ts. It represents the metadata record in the database.
* Particular DocModel entities derive from this, and add other helpful computed values.
*/
export type IRowModel<TName extends keyof SchemaTypes> = MetaRowModel & {
[ColId in keyof SchemaTypes[TName]]: KoSaveableObservable<SchemaTypes[TName][ColId]>;
};
/**
* Returns an observable for an observable array of records from the given table.
*
* @param {RowModel} rowModel: RowModel that owns this recordSet.
* @param {TableModel} tableModel: The model for the table to return records from.
* @param {String} groupByField: The name of the field in the other table by which to group. The
* returned observable arrays will be for the group matching the value of rowModel.id().
* @param {String} [options.sortBy]: Keep the returned array sorted by this key. If omitted, the
* returned array will be sorted by rowId.
*/
export function recordSet<TRow extends MetaRowModel>(
rowModel: MetaRowModel, tableModel: MetaTableModel<TRow>, groupByField: string, options?: {sortBy: string}
): ko.Computed<KoArray<TRow>> {
const opts = {groupBy: groupByField, sortBy: 'id', ...options};
return koUtil.computedAutoDispose(
() => tableModel.createRowGroupModel(rowModel.id() || 0, opts),
null, { pure: true });
}
/**
* Returns an observable for a record from another table, selected using the passed-in observable
* for a rowId. If rowId is invalid, returns the row model for the fake empty record.
* @param {TableModel} tableModel: The model for the table to return a record from.
* @param {ko.observable} rowIdObs: An observable for the row id to look up.
*/
export function refRecord<TRow extends MetaRowModel>(
tableModel: MetaTableModel<TRow>, rowIdObs: ko.Observable<number>|ko.Computed<number>
): ko.Computed<TRow> {
// Pass 'true' to getRowModel() to depend on the row version.
return ko.pureComputed(() => tableModel.getRowModel(rowIdObs() || 0, true));
}
// Use an alias for brevity.
type MTM<RowModel extends MetaRowModel> = MetaTableModel<RowModel>;
export class DocModel {
// MTM is a shorthand for MetaTableModel below, to keep each item to one line.
public docInfo: MTM<DocInfoRec> = this._metaTableModel("_grist_DocInfo", createDocInfoRec);
public tables: MTM<TableRec> = this._metaTableModel("_grist_Tables", createTableRec);
public columns: MTM<ColumnRec> = this._metaTableModel("_grist_Tables_column", createColumnRec);
public views: MTM<ViewRec> = this._metaTableModel("_grist_Views", createViewRec);
public viewSections: MTM<ViewSectionRec> = this._metaTableModel("_grist_Views_section", createViewSectionRec);
public viewFields: MTM<ViewFieldRec> = this._metaTableModel("_grist_Views_section_field", createViewFieldRec);
public tableViews: MTM<TableViewRec> = this._metaTableModel("_grist_TableViews", createTableViewRec);
public tabBar: MTM<TabBarRec> = this._metaTableModel("_grist_TabBar", createTabBarRec);
public validations: MTM<ValidationRec> = this._metaTableModel("_grist_Validations", createValidationRec);
public pages: MTM<PageRec> = this._metaTableModel("_grist_Pages", createPageRec);
public rules: MTM<ACLRuleRec> = this._metaTableModel("_grist_ACLRules", createACLRuleRec);
public allTables: KoArray<TableRec>;
public allTableIds: KoArray<string>;
// A mapping from tableId to DataTableModel for user-defined tables.
public dataTables: {[tableId: string]: DataTableModel} = {};
// Another map, this one mapping tableRef (rowId) to DataTableModel.
public dataTablesByRef = new Map<number, DataTableModel>();
public allTabs: KoArray<TabBarRec> = this.tabBar.createAllRowsModel('tabPos');
public allDocPages: KoArray<PageRec> = this.pages.createAllRowsModel('pagePos');
// Flag for tracking whether document is in formula-editing mode
public editingFormula: ko.Observable<boolean> = ko.observable(false);
// List of all the metadata tables.
private _metaTables: Array<MetaTableModel<any>>;
constructor(public readonly docData: DocData) {
// For all the metadata tables, load their data (and create the RowModels).
for (const model of this._metaTables) {
model.loadData();
}
// An observable array of user-visible tables, sorted by tableId, excluding summary tables.
// This is a publicly exposed member.
this.allTables = createUserTablesArray(this.tables);
// An observable array of user-visible tableIds. A shortcut mapped from allTables.
const allTableIds = ko.computed(() => this.allTables.all().map(t => t.tableId()));
this.allTableIds = koArray.syncedKoArray(allTableIds);
// Create an observable array of RowModels for all the data tables. We'll trigger
// onAddTable/onRemoveTable in response to this array's splice events below.
const allTableMetaRows = this.tables.createAllRowsModel('id');
// For a new table, we get AddTable action followed by metadata actions to add a table record
// (which triggers this subscribeForEach) and to add all the column records. So we have to keep
// in mind that metadata for columns isn't available yet.
allTableMetaRows.subscribeForEach({
add: r => this._onAddTable(r),
remove: r => this._onRemoveTable(r),
});
}
private _metaTableModel<TName extends keyof SchemaTypes, TRow extends IRowModel<TName>>(
tableId: TName,
rowConstructor: (this: TRow, docModel: DocModel) => void,
): MetaTableModel<TRow> {
const fields = Object.keys(schema[tableId]);
const model = new MetaTableModel<TRow>(this, this.docData.getTable(tableId)!, fields, rowConstructor);
// To keep _metaTables private member listed after public ones, initialize it on first use.
if (!this._metaTables) { this._metaTables = []; }
this._metaTables.push(model);
return model;
}
private _onAddTable(tableMetaRow: TableRec) {
let tid = tableMetaRow.tableId();
const dtm = new DataTableModel(this, this.docData.getTable(tid)!, tableMetaRow);
this.dataTables[tid] = dtm;
this.dataTablesByRef.set(tableMetaRow.getRowId(), dtm);
// Subscribe to tableMetaRow.tableId() to handle table renames.
tableMetaRow.tableId.subscribe(newTableId => {
this.dataTables[newTableId] = this.dataTables[tid];
delete this.dataTables[tid];
tid = newTableId;
});
}
private _onRemoveTable(tableMetaRow: TableRec) {
const tid = tableMetaRow.tableId();
this.dataTables[tid].dispose();
delete this.dataTables[tid];
this.dataTablesByRef.delete(tableMetaRow.getRowId());
}
}
/**
* Helper to create an observable array of tables, sorted by tableId, and excluding summary
* tables.
*/
function createUserTablesArray(tablesModel: MetaTableModel<TableRec>): KoArray<TableRec> {
// Create a rowSource that filters out table records with non-zero summarySourceTable
// and GristHidden tables for import.
const tableIdGetter = tablesModel.tableData.getRowPropFunc('tableId') as (r: RowId) => string;
const sumTableGetter = tablesModel.tableData.getRowPropFunc('summarySourceTable') as (r: RowId) => number;
const rowSource = new rowset.FilteredRowSource(r => (sumTableGetter(r) === 0 &&
!tableIdGetter(r).startsWith('GristHidden')));
rowSource.subscribeTo(tablesModel);
// Create an observable RowModel array based on this rowSource, sorted by tableId.
return tablesModel._createRowSetModel(rowSource, 'tableId');
}