@exalif/ngx-breadcrumbs
Version:
Angular 4+ breadcrumbs on top of native Angular router
62 lines • 7.21 kB
JavaScript
import { Observable, of, from } from 'rxjs';
export class BreadcrumbsUtils {
static stringFormat(rawTemplate, data) {
const templateRegex = new RegExp('{{[\\s]*[a-zA-Z._]+?[\\s]*}}', 'g');
return rawTemplate.replace(templateRegex, (match) => {
const keyRegex = new RegExp('([a-zA-Z._]+)', 'g');
const key = match.match(keyRegex);
if (!key || !key.length) {
return match;
}
const value = BreadcrumbsUtils.leaf(data, key[0]);
if (!value) {
return key[0];
}
return value;
});
}
static wrapIntoObservable(value) {
if (value instanceof Observable) {
return value;
}
if (this.isPromise(value)) {
return from(Promise.resolve(value));
}
return of(value);
}
static isPromise(value) {
return value && (typeof value.then === 'function');
}
/**
* Access object nested value by giving a path
*
* @param obj The object you want to access value from
* @param path The value path. e.g: `bar.baz`
* @example
* const obj = { foo: { bar: 'Baz' } };
* const path = 'foo.bar';
* leaf(obj, path) // 'Baz'
*/
static leaf(obj, path) {
const result = path.split('.').reduce((value, el) => value[el] || {}, obj);
return BreadcrumbsUtils.isEmptyObject(result) ? null : result;
}
/**
* checks whether an object is empty or not
*
* @param object object to extract values from
* @returns boolean
*/
static isEmptyObject(obj) {
if (typeof obj === 'object' && Object.prototype.toString.call(obj) === '[object Object]') {
for (const key in obj) {
if (Object.prototype.hasOwnProperty.call(obj, key)) {
return false;
}
}
return true;
}
return false;
}
}
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