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import {
Component,
EventEmitter,
Input,
OnChanges,
OnInit,
Output,
ViewChild
} from '@angular/core';
import _ from 'lodash';
import { CellTemplate } from '~/app/shared/enum/cell-template.enum';
import { CdTableColumn } from '~/app/shared/models/cd-table-column';
import { CdDatePipe } from '~/app/shared/pipes/cd-date.pipe';
import { TableComponent } from '../table/table.component';
interface KeyValueItem {
key: string;
value: any;
}
/**
* Display the given data in a 2 column data table. The left column
* shows the 'key' attribute, the right column the 'value' attribute.
* The data table has the following characteristics:
* - No header and footer is displayed
* - The relation of the width for the columns 'key' and 'value' is 1:3
* - The 'key' column is displayed in bold text
*/
@Component({
selector: 'cd-table-key-value',
templateUrl: './table-key-value.component.html',
styleUrls: ['./table-key-value.component.scss']
})
export class TableKeyValueComponent implements OnInit, OnChanges {
@ViewChild(TableComponent, { static: true })
table: TableComponent;
@Input()
data: any;
@Input()
autoReload: any = 5000;
@Input()
renderObjects = false;
// Only used if objects are rendered
@Input()
appendParentKey = true;
@Input()
hideEmpty = false;
@Input()
hideKeys: string[] = []; // Keys of pairs not to be displayed
// If set, the classAddingTpl is used to enable different css for different values
@Input()
customCss?: { [css: string]: number | string | ((any: any) => boolean) };
columns: Array<CdTableColumn> = [];
tableData: KeyValueItem[];
/**
* The function that will be called to update the input data.
*/
@Output()
fetchData = new EventEmitter();
constructor(private datePipe: CdDatePipe) {}
ngOnInit() {
this.columns = [
{
prop: 'key',
flexGrow: 1,
cellTransformation: CellTemplate.bold
},
{
prop: 'value',
flexGrow: 3
}
];
if (this.customCss) {
this.columns[1].cellTransformation = CellTemplate.classAdding;
}
// We need to subscribe the 'fetchData' event here and not in the
// HTML template, otherwise the data table will display the loading
// indicator infinitely if data is only bound via '[data]="xyz"'.
// See for 'loadingIndicator' in 'TableComponent::ngOnInit()'.
if (this.fetchData.observers.length > 0) {
this.table.fetchData.subscribe(() => {
// Forward event triggered by the 'cd-table' data table.
this.fetchData.emit();
});
}
this.useData();
}
ngOnChanges() {
this.useData();
}
useData() {
if (!this.data) {
return; // Wait for data
}
let pairs = this.makePairs(this.data);
if (this.hideKeys) {
pairs = pairs.filter((pair) => !this.hideKeys.includes(pair.key));
}
this.tableData = pairs;
}
private makePairs(data: any): KeyValueItem[] {
let result: KeyValueItem[] = [];
if (!data) {
return undefined; // Wait for data
} else if (_.isArray(data)) {
result = this.makePairsFromArray(data);
} else if (_.isObject(data)) {
result = this.makePairsFromObject(data);
} else {
throw new Error('Wrong data format');
}
result = result
.map((item) => {
item.value = this.convertValue(item.value);
return item;
})
.filter((i) => i.value !== null);
return _.sortBy(this.renderObjects ? this.insertFlattenObjects(result) : result, 'key');
}
private makePairsFromArray(data: any[]): KeyValueItem[] {
let temp: any[] = [];
const first = data[0];
if (_.isArray(first)) {
if (first.length === 2) {
temp = data.map((a) => ({
key: a[0],
value: a[1]
}));
} else {
throw new Error(
`Array contains too many elements (${first.length}). ` +
`Needs to be of type [string, any][]`
);
}
} else if (_.isObject(first)) {
if (_.has(first, 'key') && _.has(first, 'value')) {
temp = [...data];
} else {
temp = data.reduce(
(previous: any[], item) => previous.concat(this.makePairsFromObject(item)),
temp
);
}
}
return temp;
}
private makePairsFromObject(data: any): KeyValueItem[] {
return Object.keys(data).map((k) => ({
key: k,
value: data[k]
}));
}
private insertFlattenObjects(data: KeyValueItem[]): any[] {
return _.flattenDeep(
data.map((item) => {
const value = item.value;
const isObject = _.isObject(value);
if (!isObject || _.isEmpty(value)) {
if (isObject) {
item.value = '';
}
return item;
}
return this.splitItemIntoItems(item);
})
);
}
/**
* Split item into items will call _makePairs inside _makePairs (recursion), in oder to split
* the object item up into items as planned.
*/
private splitItemIntoItems(data: { key: string; value: object }): KeyValueItem[] {
return this.makePairs(data.value).map((item) => {
if (this.appendParentKey) {
item.key = data.key + ' ' + item.key;
}
return item;
});
}
private convertValue(value: any): KeyValueItem {
if (_.isArray(value)) {
if (_.isEmpty(value) && this.hideEmpty) {
return null;
}
value = value.map((item) => (_.isObject(item) ? JSON.stringify(item) : item)).join(', ');
} else if (_.isObject(value)) {
if ((this.hideEmpty && _.isEmpty(value)) || !this.renderObjects) {
return null;
}
} else if (_.isString(value)) {
if (value === '' && this.hideEmpty) {
return null;
}
if (this.isDate(value)) {
value = this.datePipe.transform(value) || value;
}
}
return value;
}
private isDate(s: string) {
const sep = '[ -:.TZ]';
const n = '\\d{2}' + sep;
// year - m - d - h : m : s . someRest Z (if UTC)
return s.match(new RegExp('^\\d{4}' + sep + n + n + n + n + n + '\\d*' + 'Z?$'));
}
}
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