feat: add formatting pipes basted on Intl

src/app/translation/common-string-pipes.ts

@@ -13,10 +13,10 @@
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
-import {DecimalPipe} from '@angular/common';
 import {Injectable, OnDestroy, Pipe, PipeTransform} from '@angular/core';
 import {LangChangeEvent, TranslateService} from '@ngx-translate/core';
 import {Subscription} from 'rxjs';
+import {logger} from '../_helpers/ts-logger';
 
 @Injectable()
 @Pipe({
@@ -26,7 +26,7 @@ import {Subscription} from 'rxjs';
 export class ArrayJoinPipe implements PipeTransform {
   value = '';
 
-  transform(anArray: unknown[], separator: string | unknown): unknown {
+  transform(anArray: unknown[] | unknown, separator: string | unknown): string {
     if (typeof separator !== 'string' || separator.length <= 0) {
       return this.value;
     }
@@ -43,6 +43,27 @@ export class ArrayJoinPipe implements PipeTransform {
   }
 }
 
+@Injectable()
+@Pipe({
+  name: 'sentencecase',
+  pure: false, // required to update the value when the promise is resolved
+})
+export class SentenceCasePipe implements PipeTransform {
+  value = '';
+
+  transform(aString: string | unknown): string {
+
+    if (typeof aString !== 'string'){
+      throw new SyntaxError(`Wrong parameter in StringSplitPipe. Expected a valid String, received: ${aString}`);
+    }
+
+    this.value = aString.substr(0,1)
+      .toUpperCase() + aString.substr(1);
+
+    return this.value;
+  }
+}
+
 @Injectable()
 @Pipe({
   name: 'split',
@@ -51,7 +72,7 @@ export class ArrayJoinPipe implements PipeTransform {
 export class StringSplitPipe implements PipeTransform {
   value = new Array<unknown>();
 
-  transform<T>(aString: string | T, splitter: string | T): T {
+  transform(aString: string | unknown, splitter: string | unknown): unknown[] {
     if (typeof splitter !== 'string' || splitter.length <= 0) {
       return this.value as never;
     }
@@ -74,21 +95,16 @@ export class StringSplitPipe implements PipeTransform {
   pure: false, // required to update the value when the promise is resolved
 })
 export class NumberLocalizedPipe implements PipeTransform, OnDestroy {
-  decimalPipe: DecimalPipe;
-
   locale: string;
-
-  onLangChange: Subscription;
-
-  value: unknown;
+  onLangChange?: Subscription;
+  value: string;
 
   constructor(private readonly translate: TranslateService) {
-    this.decimalPipe = new DecimalPipe('de-DE');
     this.locale = translate.currentLang;
   }
 
   private _dispose(): void {
-    if (this.onLangChange?.closed) {
+    if (this.onLangChange?.closed === false) {
       this.onLangChange?.unsubscribe();
     }
   }
@@ -98,33 +114,97 @@ export class NumberLocalizedPipe implements PipeTransform, OnDestroy {
   }
 
   /**
-   * @param value The number to be formatted.
-   * @param digitsInfo Decimal representation options, specified by a string
-   * in the following format: {minIntegerDigits}.{minFractionDigits}-{maxFractionDigits}
-   *   - `minIntegerDigits`: The minimum number of integer digits before the decimal point.
-   * Default is `1`.
-   *   - `minFractionDigits`: The minimum number of digits after the decimal point.
-   * Default is `0`.
-   *   - `maxFractionDigits`: The maximum number of digits after the decimal point.
-   * Default is `3`.
+   * @param value The number to be formatted
+   * @param formatOptions Formatting options to include.
+   * As specified by Intl.NumberFormatOptions as comma seperated key:value pairs.
    */
-  transform(value: unknown, digitsInfo?: string | undefined): unknown {
-    this.updateValue(value, digitsInfo);
+  transform(value: string | number | unknown, formatOptions?: string): string {
+    this.updateValue(value, formatOptions);
     this._dispose();
-    if (typeof this.onLangChange === 'undefined' || this.onLangChange.closed) {
-      this.onLangChange = this.translate.onLangChange.subscribe(
-        (event: LangChangeEvent) => {
+    if (this.onLangChange?.closed === true) {
+      this.onLangChange = this.translate.onLangChange.subscribe((event: LangChangeEvent) => {
         this.locale = event.lang;
-          this.updateValue(value, digitsInfo);
-        },
-      );
+        this.updateValue(value, formatOptions);
+      });
     }
 
     return this.value;
   }
 
-  updateValue(value: unknown, digitsInfo?: string | undefined): void {
-    // this.value = this.locale;
-    this.value = this.decimalPipe.transform(value, digitsInfo, this.locale);
+  updateValue(value: string | number | unknown, formatOptions?: string): void {
+    if (typeof value !== 'string' && typeof value !== 'number') {
+      logger.warn(`numberLocalized pipe unable to parse input: ${value}`);
+
+      return;
+    }
+    const options = formatOptions?.split(',')
+      .map((element) => element.split(':'))
+      .reduce((acc, [key, val]) => ({...acc, [key.trim()]: val.trim()}),{}) as Intl.NumberFormatOptions;
+    const float = typeof value === 'string' ?  Number.parseFloat(value) : value as number;
+    this.value = new Intl.NumberFormat(this.locale, options).format(float);
+  }
+}
+
+@Injectable()
+@Pipe({
+  name: 'dateFormat',
+  pure: false, // required to update the value when the promise is resolved
+})
+export class DateLocalizedFormatPipe implements PipeTransform, OnDestroy {
+  locale: string;
+  onLangChange?: Subscription;
+  value: string;
+
+  constructor(private readonly translate: TranslateService) {
+    this.locale = translate.currentLang;
+  }
+
+  private _dispose(): void {
+    if (this.onLangChange?.closed === false) {
+      this.onLangChange?.unsubscribe();
+    }
+  }
+
+  ngOnDestroy(): void {
+    this._dispose();
+  }
+
+  /**
+   * @param value The date to be formatted
+   * @param formatOptions Dateformat options to include.
+   * As specified by Intl.DateTimeFormatOptions as comma seperated key:value pairs
+   * Default is year,month,day,hour and minute in numeric representation e.g. (en-US) "8/6/2021, 10:35"
+   */
+  transform(value: string | unknown, formatOptions?: string): string {
+    this.updateValue(value, formatOptions);
+    this._dispose();
+    if (this.onLangChange?.closed === true) {
+      this.onLangChange = this.translate.onLangChange.subscribe((event: LangChangeEvent) => {
+        this.locale = event.lang;
+        this.updateValue(value, formatOptions);
+      });
+    }
+
+    return this.value;
+  }
+
+  updateValue(value: string | Date | unknown, formatOptions?: string): void {
+    if (typeof value !== 'string' && Object.prototype.toString.call(value) !== '[object Date]') {
+      logger.warn(`dateFormat pipe unable to parse input: ${value}`);
+
+      return;
+    }
+    const options = formatOptions?.split(',')
+      .map((element) => element.split(':'))
+      .reduce((acc, [key, val]) => ({...acc, [key.trim()]: val.trim()}),{}) as Intl.DateTimeFormatOptions;
+    const date = typeof value === 'string' ? Date.parse(value) : value as Date;
+    this.value = new Intl.DateTimeFormat(this.locale, options ?? {
+                                                                   day: 'numeric',
+                                                                   month: 'numeric',
+                                                                   year: 'numeric',
+                                                                   hour: 'numeric',
+                                                                   minute: 'numeric',
+                                                                 })
+                                        .format(date);
   }
 }

src/app/translation/thing-translate.module.ts

@@ -14,19 +14,9 @@
  */
 
 import {ModuleWithProviders, NgModule, Provider} from '@angular/core';
-import {
-  ArrayJoinPipe,
-  NumberLocalizedPipe,
-  StringSplitPipe,
-} from './common-string-pipes';
-import {
-  ThingTranslateDefaultParser,
-  ThingTranslateParser,
-} from './thing-translate.parser';
-import {
-  ThingPropertyNameTranslatePipe,
-  ThingTranslatePipe,
-} from './thing-translate.pipe';
+import {ArrayJoinPipe, DateLocalizedFormatPipe, NumberLocalizedPipe, SentenceCasePipe, StringSplitPipe} from './common-string-pipes';
+import {ThingTranslateDefaultParser, ThingTranslateParser} from './thing-translate.parser';
+import {ThingPropertyNameTranslatePipe, ThingTranslatePipe} from './thing-translate.pipe';
 import {ThingTranslateService} from './thing-translate.service';
 
 export interface ThingTranslateModuleConfig {
@@ -40,6 +30,8 @@ export interface ThingTranslateModuleConfig {
     StringSplitPipe,
     ThingPropertyNameTranslatePipe,
     ThingTranslatePipe,
+    DateLocalizedFormatPipe,
+    SentenceCasePipe,
   ],
   exports: [
     ArrayJoinPipe,
@@ -47,6 +39,8 @@ export interface ThingTranslateModuleConfig {
     StringSplitPipe,
     ThingPropertyNameTranslatePipe,
     ThingTranslatePipe,
+    DateLocalizedFormatPipe,
+    SentenceCasePipe,
   ],
 })
 export class ThingTranslateModule {