77 lines
2.3 KiB
TypeScript
77 lines
2.3 KiB
TypeScript
///
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/// Copyright © 2016-2020 The Thingsboard Authors
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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import { Injectable } from '@angular/core';
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import { TranslateParser } from '@ngx-translate/core';
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import { isDefinedAndNotNull } from '@core/utils';
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@Injectable({ providedIn: 'root' })
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export class TranslateDefaultParser extends TranslateParser {
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templateMatcher: RegExp = /{{\s?([^{}\s]*)\s?}}/g;
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// tslint:disable-next-line:ban-types
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public interpolate(expr: string | Function, params?: any): string {
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let result: string;
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if (typeof expr === 'string') {
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result = this.interpolateString(expr, params);
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} else if (typeof expr === 'function') {
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result = this.interpolateFunction(expr, params);
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if (typeof result === 'string') {
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result = this.interpolateString(result, params);
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}
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} else {
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result = expr as string;
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}
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return result;
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}
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getValue(target: any, key: string): any {
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const keys = typeof key === 'string' ? key.split('.') : [key];
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key = '';
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do {
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key += keys.shift();
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if (isDefinedAndNotNull(target) && isDefinedAndNotNull(target[key]) && (typeof target[key] === 'object' || !keys.length)) {
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target = target[key];
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key = '';
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} else if (!keys.length) {
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target = undefined;
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} else {
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key += '.';
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}
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} while (keys.length);
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return target;
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}
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// tslint:disable-next-line:ban-types
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private interpolateFunction(fn: Function, params?: any) {
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return fn(params);
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}
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private interpolateString(expr: string, params?: any) {
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if (!params) {
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return expr;
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}
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return expr.replace(this.templateMatcher, (substring: string, b: string) => {
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const r = this.getValue(params, b);
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return isDefinedAndNotNull(r) ? r : substring;
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});
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}
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}
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