@c8y/ngx-components
Version:
Angular modules for Cumulocity IoT applications
153 lines • 25.2 kB
JavaScript
import { chunk, flow, get, isNil, mapValues, omitBy, orderBy } from 'lodash-es';
import { BehaviorSubject, defer, of, Subject } from 'rxjs';
import { catchError, finalize, map, switchMap, tap } from 'rxjs/operators';
import { toObservable } from '../common/extension-hooks';
export class GridDataSource {
constructor() {
this.loadingSubject = new BehaviorSubject(true);
this.dataSourceSubject = new BehaviorSubject([]);
this.dataStatsSubject = new BehaviorSubject({
size: 0,
filteredSize: 0,
currentPage: 0,
currentPageSize: 0,
firstPageSize: 0
});
this.dataSelectionSubject = new BehaviorSubject({
filteredDataIds: []
});
this.resultListSubject = new Subject();
this.loading$ = this.loadingSubject.asObservable();
this.data$ = this.dataSourceSubject.asObservable();
this.stats$ = this.dataStatsSubject.asObservable();
this.selection$ = this.dataSelectionSubject.asObservable();
this.resultList$ = this.resultListSubject.asObservable();
}
connect(_collectionViewer) {
return this.data$;
}
disconnect(_collectionViewer) {
this.loadingSubject.complete();
this.dataSourceSubject.complete();
this.dataStatsSubject.complete();
this.dataSelectionSubject.complete();
}
loadData({ rows, columns, pagination, searchText, serverSideDataCallback, selectable, selectionPrimaryKey, infiniteScroll, reload = false }) {
const clientSideData$ = toObservable(rows).pipe(map(initialData => {
let filteredSize = 0;
let filteredDataIds = [];
const transformedData = flow(data => this.doClientSideSearch({ data, columns, searchText }), data => this.doClientSideFiltering({ data, columns }), data => this.doClientSideSorting({ data, columns }), data => {
filteredSize = data.length;
filteredDataIds = selectable
? data.map(item => item[selectionPrimaryKey])
: filteredDataIds;
return data;
}, data => this.doClientSidePagination({ data, pagination }))(initialData);
this.dataStatsSubject.next({
size: initialData.length,
filteredSize,
currentPage: pagination.currentPage,
currentPageSize: transformedData.length,
firstPageSize: pagination.pageSize
});
this.dataSelectionSubject.next({ filteredDataIds });
return transformedData;
}));
const serverSideData$ = defer(() => toObservable(serverSideDataCallback({
columns,
searchText,
pagination,
selection: { enabled: selectable, primaryKey: selectionPrimaryKey }
}))).pipe(map((result) => {
const { data, paging, size, filteredSize, filteredDataIds } = result;
this.dataStatsSubject.next({
size,
filteredSize,
currentPage: paging.currentPage,
currentPageSize: data.length,
nextPage: paging.nextPage,
firstPageSize: paging.pageSize
});
this.dataSelectionSubject.next({ filteredDataIds: filteredDataIds || [] });
this.resultListSubject.next(result);
return data;
}));
const data$ = typeof serverSideDataCallback === 'function' ? serverSideData$ : clientSideData$;
of([])
.pipe(tap(() => this.loadingSubject.next(true)), switchMap(() => data$), catchError(() => {
this.dataStatsSubject.next({
size: 0,
filteredSize: 0,
currentPage: 0,
currentPageSize: 0,
firstPageSize: 0
});
this.dataSelectionSubject.next({ filteredDataIds: [] });
return of([]);
}), finalize(() => this.loadingSubject.next(false)))
.subscribe(result => {
const data = infiniteScroll && !reload ? [...this.dataSourceSubject.value, ...result] : result;
this.dataSourceSubject.next(data);
});
}
resolveValue(x, path) {
return get(x, path);
}
resolveFunction(x) {
return typeof x === 'function' ? x() : x;
}
normalizeNil(x) {
return isNil(x) ? '' : x;
}
doClientSideFiltering({ data, columns }) {
return columns.reduce((result, column) => {
const { filterPredicate } = column;
if (typeof filterPredicate === 'string') {
return this.doClientSideSearch({
data: result,
columns: [column],
searchText: filterPredicate
});
}
if (typeof filterPredicate === 'function') {
return result.filter(item => filterPredicate(item, column.path));
}
return result;
}, data);
}
doClientSideSearch({ data, columns, searchText }) {
const propPaths = columns.map(({ path }) => path).filter(column => !isNil(column));
const regexSearch = this.createRegexSearch(searchText);
return data.filter(item => {
const itemWithResolvedValues = flow(x => propPaths.map(propPath => get(x, propPath)), x => mapValues(x, this.resolveFunction), x => omitBy(x, isNil))(item);
const cellValues = Object.values(itemWithResolvedValues);
return cellValues.some(cellValue => regexSearch.test(cellValue.toString()));
});
}
doClientSideSorting({ data, columns }) {
const actives = columns.filter(({ sortOrder }) => !!sortOrder);
const sortingState = {
iteratees: actives.map(({ path }) => path).map(path => item => get(item, path) ?? ''),
orders: actives.map(({ sortOrder }) => sortOrder)
};
return orderBy(data, sortingState.iteratees, sortingState.orders);
}
doClientSidePagination({ data, pagination }) {
return pagination
? get(chunk(data, pagination.pageSize), pagination.currentPage - 1, [])
: data;
}
createRegexSearch(filterValue) {
return RegExp(escapeRegExpPattern(filterValue), 'i');
}
}
/**
*
* @param string pattern Regex pattern.
* @return string The escaped regex.
* @see https://stackoverflow.com/a/3561711/2013891
*/
function escapeRegExpPattern(pattern = '') {
return pattern.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
}
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{ CollectionViewer, DataSource } from '@angular/cdk/collections';\nimport { IResultList } from '@c8y/client';\nimport { chunk, flow, get, isNil, mapValues, omitBy, orderBy } from 'lodash-es';\nimport { BehaviorSubject, defer, Observable, of, Subject } from 'rxjs';\nimport { catchError, finalize, map, switchMap, tap } from 'rxjs/operators';\nimport { toObservable } from '../common/extension-hooks';\nimport { Column, DataSourceStats, ServerSideDataResult } from './data-grid.model';\n\nexport class GridDataSource implements DataSource<object> {\n  loading$: Observable<boolean>;\n  data$: Observable<object[]>;\n  stats$: Observable<DataSourceStats>;\n  selection$: Observable<any>;\n  resultList$: Observable<IResultList<object>>;\n\n  private loadingSubject = new BehaviorSubject<boolean>(true);\n  private dataSourceSubject = new BehaviorSubject<object[]>([]);\n  private dataStatsSubject = new BehaviorSubject<DataSourceStats>({\n    size: 0,\n    filteredSize: 0,\n    currentPage: 0,\n    currentPageSize: 0,\n    firstPageSize: 0\n  });\n  private dataSelectionSubject = new BehaviorSubject<any>({\n    filteredDataIds: []\n  });\n  private resultListSubject = new Subject<IResultList<object>>();\n\n  constructor() {\n    this.loading$ = this.loadingSubject.asObservable();\n    this.data$ = this.dataSourceSubject.asObservable();\n    this.stats$ = this.dataStatsSubject.asObservable();\n    this.selection$ = this.dataSelectionSubject.asObservable();\n    this.resultList$ = this.resultListSubject.asObservable();\n  }\n\n  connect(_collectionViewer: CollectionViewer): Observable<object[]> {\n    return this.data$;\n  }\n\n  disconnect(_collectionViewer: CollectionViewer): void {\n    this.loadingSubject.complete();\n    this.dataSourceSubject.complete();\n    this.dataStatsSubject.complete();\n    this.dataSelectionSubject.complete();\n  }\n\n  loadData({\n    rows,\n    columns,\n    pagination,\n    searchText,\n    serverSideDataCallback,\n    selectable,\n    selectionPrimaryKey,\n    infiniteScroll,\n    reload = false\n  }) {\n    const clientSideData$ = toObservable(rows).pipe(\n      map(initialData => {\n        let filteredSize = 0;\n        let filteredDataIds = [];\n\n        const transformedData = flow(\n          data => this.doClientSideSearch({ data, columns, searchText }),\n          data => this.doClientSideFiltering({ data, columns }),\n          data => this.doClientSideSorting({ data, columns }),\n          data => {\n            filteredSize = data.length;\n            filteredDataIds = selectable\n              ? data.map(item => item[selectionPrimaryKey])\n              : filteredDataIds;\n\n            return data;\n          },\n          data => this.doClientSidePagination({ data, pagination })\n        )(initialData);\n\n        this.dataStatsSubject.next({\n          size: initialData.length,\n          filteredSize,\n          currentPage: pagination.currentPage,\n          currentPageSize: transformedData.length,\n          firstPageSize: pagination.pageSize\n        });\n        this.dataSelectionSubject.next({ filteredDataIds });\n\n        return transformedData;\n      })\n    );\n\n    const serverSideData$ = defer(() =>\n      toObservable(\n        serverSideDataCallback({\n          columns,\n          searchText,\n          pagination,\n          selection: { enabled: selectable, primaryKey: selectionPrimaryKey }\n        })\n      )\n    ).pipe(\n      map((result: ServerSideDataResult) => {\n        const { data, paging, size, filteredSize, filteredDataIds } = result;\n        this.dataStatsSubject.next({\n          size,\n          filteredSize,\n          currentPage: paging.currentPage,\n          currentPageSize: data.length,\n          nextPage: paging.nextPage,\n          firstPageSize: paging.pageSize\n        });\n        this.dataSelectionSubject.next({ filteredDataIds: filteredDataIds || [] });\n        this.resultListSubject.next(result);\n\n        return data;\n      })\n    );\n\n    const data$ = typeof serverSideDataCallback === 'function' ? serverSideData$ : clientSideData$;\n\n    of([])\n      .pipe(\n        tap(() => this.loadingSubject.next(true)),\n        switchMap(() => data$),\n        catchError(() => {\n          this.dataStatsSubject.next({\n            size: 0,\n            filteredSize: 0,\n            currentPage: 0,\n            currentPageSize: 0,\n            firstPageSize: 0\n          });\n          this.dataSelectionSubject.next({ filteredDataIds: [] });\n          return of([]);\n        }),\n        finalize(() => this.loadingSubject.next(false))\n      )\n      .subscribe(result => {\n        const data =\n          infiniteScroll && !reload ? [...this.dataSourceSubject.value, ...result] : result;\n        this.dataSourceSubject.next(data);\n      });\n  }\n\n  resolveValue(x, path) {\n    return get(x, path);\n  }\n\n  resolveFunction(x) {\n    return typeof x === 'function' ? x() : x;\n  }\n\n  normalizeNil(x) {\n    return isNil(x) ? '' : x;\n  }\n\n  private doClientSideFiltering({ data, columns }) {\n    return columns.reduce((result, column) => {\n      const { filterPredicate } = column;\n\n      if (typeof filterPredicate === 'string') {\n        return this.doClientSideSearch({\n          data: result,\n          columns: [column],\n          searchText: filterPredicate\n        });\n      }\n\n      if (typeof filterPredicate === 'function') {\n        return result.filter(item => filterPredicate(item, column.path));\n      }\n\n      return result;\n    }, data);\n  }\n\n  private doClientSideSearch({ data, columns, searchText }) {\n    const propPaths = columns.map(({ path }) => path).filter(column => !isNil(column));\n\n    const regexSearch = this.createRegexSearch(searchText);\n\n    return data.filter(item => {\n      const itemWithResolvedValues = flow(\n        x => propPaths.map(propPath => get(x, propPath)),\n        x => mapValues(x, this.resolveFunction),\n        x => omitBy(x, isNil)\n      )(item);\n\n      const cellValues = Object.values(itemWithResolvedValues);\n\n      return cellValues.some(cellValue => regexSearch.test(cellValue.toString()));\n    });\n  }\n\n  private doClientSideSorting({ data, columns }) {\n    const actives: Column[] = columns.filter(({ sortOrder }: Column) => !!sortOrder);\n\n    const sortingState = {\n      iteratees: actives.map(({ path }) => path).map(path => item => get(item, path) ?? ''),\n      orders: actives.map(({ sortOrder }) => sortOrder)\n    };\n\n    return orderBy(data, sortingState.iteratees, sortingState.orders);\n  }\n\n  private doClientSidePagination({ data, pagination }) {\n    return pagination\n      ? get(chunk(data, pagination.pageSize), pagination.currentPage - 1, [])\n      : data;\n  }\n\n  private createRegexSearch(filterValue) {\n    return RegExp(escapeRegExpPattern(filterValue), 'i');\n  }\n}\n\n/**\n *\n * @param string pattern Regex pattern.\n * @return string The escaped regex.\n * @see https://stackoverflow.com/a/3561711/2013891\n */\nfunction escapeRegExpPattern(pattern = '') {\n  return pattern.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\$&');\n}\n"]}