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import debounce from 'lodash.debounce';
import { NonInitializedError } from '../../error/non-initialized';
import { isFilledObject, isNil } from '../../utils';
import {
IGroupedDataManager,
ITekGrid,
ITekGridGroup,
ITekGridGroupFooter,
ITekGridGroupHeader,
ITekGridSummary,
} from './interfaces';
import { TekGridColumn } from './tek-grid-column';
export class GroupedDataManager implements IGroupedDataManager {
protected grid: ITekGrid;
public summaryColumns: TekGridColumn[] = [];
private groups: ITekGridGroup[] = [];
private summary: IDictionary<ITekGridSummary> = {};
private groupedData: IDictionary<any>[] = [];
private groupColumnNames: string[] = [];
private groupColumns: TekGridColumn[] = [];
private originalDatasourceLoadAll?: boolean;
private originalDatasourceLimit?: number;
private viewUpdateScrollData?: () => void;
private viewUpdateFixedColumns?: () => void;
constructor(grid: ITekGrid) {
this.grid = grid;
}
setViewUpdateFixedColumns(fn: () => void) {
this.viewUpdateFixedColumns = fn;
}
setViewUpdateScrollData(fn: () => void) {
this.viewUpdateScrollData = fn;
}
/**
* Tasks that should be finished before loading the grid data
*/
private tasksBeforeLoad: Promise<any>[] = [];
public registerTask(task: Promise<any>) {
this.tasksBeforeLoad.push(task);
}
private request: () => void = () => {
throw new NonInitializedError(this.constructor.name);
};
private debounceUpdateGrouping: (lazyLoad?: boolean) => void = () => {
throw new NonInitializedError(this.constructor.name);
};
/**
* Loads grid data after resolving all tasks
*/
public async loadAfterTasks() {
Promise.all(this.tasksBeforeLoad.map((promise) => promise.catch(() => undefined)));
this.tasksBeforeLoad = [];
return this.request();
}
private initializeDebounceFunctions() {
this.request = debounce(() => {
this.grid.reload();
}, 500);
this.debounceUpdateGrouping = debounce((lazyLoad = false) => {
this.updateGroupedData(lazyLoad);
}, 100);
}
/**
* Initializes grid groups, summary columns and registers the grid datasource callback
* @param lazyLoad defines if the grid should automatically load data after updating the datasource
*/
initializeGrouping(lazyLoad: boolean): void {
this.initializeDebounceFunctions();
this.initGroups();
this.initSummaryColumns();
this.originalDatasourceLoadAll = this.grid.datasource.loadAll;
this.originalDatasourceLimit = this.grid.datasource.limit;
this.grid.datasource.registerGetCallback((data) => this.onGet(data));
this.updateGrouping(lazyLoad);
}
private onGet(data: IDictionary) {
if (this.isGrouped()) {
this.buildGroupedData();
}
return data;
}
private resetFooterVariables(group: ITekGridGroup) {
this.summaryColumns.forEach((column) => {
group.footer[column.name] = {
count: 0,
sum: undefined,
avg: undefined,
min: undefined,
max: undefined,
};
});
}
private initGroups() {
this.groups = [];
this.groupColumns.forEach((column) => {
const newGroup = {
column,
name: column.name,
label: column.label,
lastValue: undefined,
initialized: false,
footer: {},
};
this.resetFooterVariables(newGroup);
this.groups.push(newGroup);
});
}
getGroupedData(): IDictionary<any>[] {
return this.groupedData;
}
private initSummaryColumns() {
this.summaryColumns = this.grid.columns.filter((column) => !!column.aggregation && !column.grouped);
this.summary = {};
}
/**
* Calls updateGroupedData with debounce
*/
public updateGrouping(lazyLoad?: boolean) {
this.debounceUpdateGrouping(lazyLoad);
}
/**
* Inits summary columns, updates the grid datasource and, if needed, reloads the grid data
*/
async updateGroupedData(lazyLoad: boolean): Promise<void> {
this.initSummaryColumns();
this.updateGridDatasource();
if (!lazyLoad) {
await this.loadAfterTasks();
}
if (this.grid.virtualScroll && this.viewUpdateScrollData) {
this.viewUpdateScrollData();
}
if (this.viewUpdateFixedColumns) {
this.viewUpdateFixedColumns();
}
}
/**
* When using groups, should update the grid datasource order to reflect the group order
* If the grid is not grouped, should not update the datasource order
*/
private updateGridDatasource() {
this.groupedData = [];
this.groupColumns = this.grid.columns.filter((column) => column.grouped);
this.groupColumnNames = this.groupColumns.map((column) => column.name);
if (this.isGrouped()) {
if (this.groupColumns.length) {
const order = this.getOrder(this.groupColumnNames, this.grid.datasource.order);
this.grid.datasource.order = order;
}
this.grid.datasource.loadAll = true;
return;
}
this.grid.datasource.loadAll = this.originalDatasourceLoadAll!;
this.grid.datasource.limit = this.originalDatasourceLimit!;
}
/**
* Returns the order to be used in the grid datasource based on the group column names and the grid order
*/
private getOrder(groupColumnNames: string[], gridOrder: string[]): string[] {
const groupOrderColumns = groupColumnNames.map((column) => `${column}.asc`);
const otherOrderColumns = gridOrder.filter((column) => groupColumnNames.indexOf(column.split('.')[0]) === -1);
return [...groupOrderColumns, ...otherOrderColumns];
}
/**
* Returns the summary data for the group
*/
public getSummaryData(group: IDictionary<ITekGridSummary>) {
const summaryData: IDictionary = {};
this.summaryColumns.forEach((column) => {
const { aggregation } = column;
const currentGroup = group[column.name];
if (!currentGroup) {
summaryData[column.name] = 0;
return;
}
if (aggregation === 'COUNT') {
summaryData[column.name] = currentGroup.count;
} else if (aggregation === 'SUM') {
summaryData[column.name] = currentGroup.sum;
} else if (aggregation === 'AVG') {
if (currentGroup.avg) {
summaryData[column.name] = currentGroup.avg;
} else if (typeof currentGroup.sum === 'number') {
summaryData[column.name] = currentGroup.sum / currentGroup.count;
}
} else if (aggregation === 'MIN') {
summaryData[column.name] = currentGroup.min;
} else {
// if (aggregation === 'MAX') {
summaryData[column.name] = currentGroup.max;
}
});
return summaryData;
}
/**
* Adds group footers to the grouped data
*/
private addGroupFooters(groupIndex: number) {
if (this.summaryColumns.length === 0) {
return;
}
for (let i = this.groups.length - 1; i >= groupIndex; i -= 1) {
if (this.groups[i].initialized) {
const groupFooterRow: ITekGridGroupFooter = {
groupFooter: true,
groupIndex: i,
groupHeaders: [],
groupLabel: this.groups[i].lastGroupHeaderRow!.groupLabel,
groupValue: this.groups[i].lastGroupHeaderRow!.groupValue,
...this.getSummaryData(this.groups[i].footer),
};
// add header for outer groups
for (let g = 0; g < i; g += 1) {
const { lastGroupHeaderRow } = this.groups[g];
if (lastGroupHeaderRow) {
groupFooterRow.groupHeaders.push(lastGroupHeaderRow);
}
}
this.groupedData.push(groupFooterRow);
}
}
}
private getGroupValue(group: IDictionary<any>, row: IDictionary<any>) {
const groupColumn = this.grid.getColumn(group.column.name);
const cellsApplied = this.grid.getAppliedConditions({ row, column: groupColumn });
if (!isFilledObject(cellsApplied)) {
this.grid.reapplyConditions(row);
}
const groupValue = groupColumn.formatterByRow(row, cellsApplied);
return groupValue;
}
private addGroupHeader(row: IDictionary, group: ITekGridGroup, index: number) {
const groupValue = this.getGroupValue(group, row) || group.column.groupLabelForEmptyValue;
const groupHeaderRow: ITekGridGroupHeader = {
group: true,
groupRow: row,
groupColumnName: group.column.name,
groupHeader: true,
groupIndex: index,
groupLabel: I18n.translate(group.label),
groupValue,
groupOpened: group.column.groupOpened || this.grid.groupsOpened,
groupHeaders: [],
children: [],
};
// add header for outer groups to the added row
for (let i = 0; i < index; i += 1) {
groupHeaderRow.groupHeaders.push(this.groups[i].lastGroupHeaderRow!);
}
group.lastGroupHeaderRow = groupHeaderRow;
group.initialized = true;
this.groupedData.push(groupHeaderRow);
}
private calcSummaryValues(column: TekGridColumn, summary: ITekGridSummary, row: IDictionary) {
const rowValue = row[column.name];
if (isNil(rowValue)) return;
summary.count += 1;
if (this.grid.events.calcSummary) {
this.grid.calcSummary(column, summary, row);
return;
}
if (summary.min === undefined) summary.min = rowValue;
if (summary.max === undefined) summary.max = rowValue;
summary.min = rowValue < summary.min ? rowValue : summary.min;
summary.max = rowValue > summary.max ? rowValue : summary.max;
if (typeof rowValue === 'number') {
summary.sum = (summary.sum || 0) + rowValue;
}
}
private calcSummary(row: IDictionary<any>) {
if (this.summaryColumns.length === 0) return;
this.summaryColumns.forEach((column) => {
const columnName = column.name;
if (isNil(this.summary[columnName])) {
this.summary[columnName] = {
count: 0,
sum: undefined,
avg: undefined,
min: undefined,
max: undefined,
};
}
this.calcSummaryValues(column, this.summary[columnName], row);
this.groups.forEach((group) => {
this.calcSummaryValues(column, group.footer[columnName], row);
});
});
}
private addSummary() {
if (this.summaryColumns.length === 0) return;
const summaryRow = {
groupFooter: true,
groupSummary: true,
...this.getSummaryData(this.summary),
};
this.groupedData.push(summaryRow);
}
/**
* It takes a flat array of data and groups it by the group columns specified in
* the grid.
*/
buildGroupedData(): void {
this.initGroups();
this.initSummaryColumns();
this.groupedData = [];
const data = this.grid.getData();
data.forEach((row) => {
let groupBreak = false;
this.groups.forEach((group, index) => {
const groupValue = row[group.name];
if (group.lastValue !== groupValue || groupBreak) {
if (!groupBreak) {
this.addGroupFooters(index);
}
group.lastValue = groupValue;
this.resetFooterVariables(group);
this.addGroupHeader(row, group, index);
groupBreak = true;
}
});
this.groups.forEach((group) => {
group.lastGroupHeaderRow!.children.push(row);
});
this.groupedData.push({
...row,
groupHeaders: this.groups.map((group) => group.lastGroupHeaderRow).filter(Boolean),
});
this.calcSummary(row);
});
if (this.groupedData.length > 0) {
this.addGroupFooters(0);
if (this.grid.showSummaryTotal) {
this.addSummary();
}
}
}
openGroup(group: IDictionary<any>): void {
group.groupOpened = !group.groupOpened;
if (this.grid.virtualScroll && this.viewUpdateScrollData) this.viewUpdateScrollData();
}
isItemVisible(row: IDictionary<any>) {
return !row.groupHeaders || !row.groupHeaders.length || row.groupHeaders.every((group: any) => group.groupOpened);
}
isGrouped(): boolean {
return !!this.groupColumnNames.length || (this.grid.showSummaryTotal && !!this.summaryColumns.length);
}
isColumnSearchable(column: TekGridColumn): boolean {
return !this.grid.searchVisibleOnly || column.isVisible || column.grouped;
}
directionalLeft(): void {
const { currentRow } = this.grid.datasource;
if (currentRow.group && currentRow.groupOpened) {
currentRow.groupOpened = false;
return;
}
if (this.grid.cellSelection || !currentRow.groupHeaders?.length) return;
const newCurrentRow = currentRow.groupHeaders[currentRow.groupHeaders.length - 1];
this.grid.setCurrentRow(newCurrentRow);
}
directionalRight(): void {
const { currentRow } = this.grid.datasource;
if (!currentRow.group || currentRow.groupOpened) return;
currentRow.groupOpened = true;
}
}
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