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101 lines
3.6 KiB
101 lines
3.6 KiB
import { ColumnFilter } from "app/client/models/ColumnFilter";
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import { FilterInfo } from "app/client/models/entities/ViewSectionRec";
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import { CellValue } from "app/plugin/GristData";
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import { normalizeText } from "app/client/lib/ACIndex";
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import { Computed, Disposable, Observable } from "grainjs";
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import escapeRegExp = require("lodash/escapeRegExp");
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import isNull = require("lodash/isNull");
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const MAXIMUM_SHOWN_FILTER_ITEMS = 500;
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export interface IFilterCount {
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// label is the formatted value
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label: string;
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// number of occurences in the table
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count: number;
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// displayValue is the underlying value (from the display column, if any), useful to perform
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// comparison
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displayValue: any;
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}
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type ICompare<T> = (a: T, b: T) => number
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const localeCompare = new Intl.Collator('en-US', {numeric: true}).compare;
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interface ColumnFilterMenuModelParams {
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columnFilter: ColumnFilter;
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filterInfo: FilterInfo;
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valueCount: Array<[CellValue, IFilterCount]>;
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limitShow?: number;
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}
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export class ColumnFilterMenuModel extends Disposable {
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public readonly columnFilter = this._params.columnFilter;
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public readonly filterInfo = this._params.filterInfo;
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public readonly initialPinned = this.filterInfo.isPinned.peek();
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public readonly limitShown = this._params.limitShow ?? MAXIMUM_SHOWN_FILTER_ITEMS;
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public readonly searchValue = Observable.create(this, '');
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public readonly isSortedByCount = Observable.create(this, false);
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// computes a set of all keys that matches the search text.
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public readonly filterSet = Computed.create(this, this.searchValue, (_use, searchValue) => {
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const searchRegex = new RegExp(escapeRegExp(normalizeText(searchValue)), 'i');
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const showAllOptions = ['Bool', 'Choice', 'ChoiceList'].includes(this.columnFilter.columnType);
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return new Set(
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this._params.valueCount
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.filter(([_, {label, count}]) => (showAllOptions ? true : count) && searchRegex.test(normalizeText(label)))
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.map(([key]) => key)
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);
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});
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// computes the sorted array of all values (ie: pair of key and IFilterCount) that matches the search text.
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public readonly filteredValues = Computed.create(
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this, this.filterSet, this.isSortedByCount,
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(_use, filter, isSortedByCount) => {
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const prop: keyof IFilterCount = isSortedByCount ? 'count' : 'displayValue';
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let isShownFirst: (val: any) => boolean = isNull;
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if (['Date', 'DateTime', 'Numeric', 'Int'].includes(this.columnFilter.visibleColumnType)) {
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isShownFirst = (val) => isNull(val) || isNaN(val);
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}
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const comparator: ICompare<any> = (a, b) => {
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if (isShownFirst(a)) { return -1; }
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if (isShownFirst(b)) { return 1; }
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return localeCompare(a, b);
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};
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return this._params.valueCount
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.filter(([key]) => filter.has(key))
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.sort((a, b) => comparator(a[1][prop], b[1][prop]));
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}
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);
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// computes the array of all values that does NOT matches the search text
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public readonly otherValues = Computed.create(this, this.filterSet, (_use, filter) => {
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return this._params.valueCount.filter(([key]) => !filter.has(key));
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});
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// computes the array of keys that matches the search text
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public readonly filteredKeys = Computed.create(this, this.filterSet, (_use, filter) => {
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return this._params.valueCount
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.filter(([key]) => filter.has(key))
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.map(([key]) => key);
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});
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public readonly valuesBeyondLimit = Computed.create(this, this.filteredValues, (_use, filteredValues) => {
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return filteredValues.slice(this.limitShown);
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});
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constructor(private _params: ColumnFilterMenuModelParams) {
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super();
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}
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}
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