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* Copyright bei
* Entwicklungs- und Pflegeverbund für das gemeinsame Fachverfahren gefa
*
*******************************************************************************/
import { Component, Directive, Input, TemplateRef } from '@angular/core';
import { Typography } from '../../typography/typography.directive';
type FormattedText = (
| { kind: 'text'; text: string }
| { kind: 'bold'; text: FormattedText }
| { kind: 'italic'; text: FormattedText }
| { kind: 'br' }
| { kind: 'ul'; liArray: FormattedText[] }
)[];
const MDList = /(?<list>^(?:\* .*\n*)+)/;
const MDBold = /\*\*(?<bold>\*.+?\*|.+?)\*\*/;
const MDItalic = /\*(?<italic>.+?)\*/;
const MDEmptyLine = /(?<br>\n\s*\n)/;
interface FormattedTextContext {
$implicit: FormattedText;
}
/**
* Typeguard for the formatted text data structure
*/
@Directive({
selector: 'ng-template[data-gc-formatted-text]',
})
export class TextFormatterDirective {
constructor(public readonly template: TemplateRef<FormattedTextContext>) {}
/**
* @ignore
*/
static ngTemplateContextGuard(
_dir: TextFormatterDirective,
ctx: unknown,
): ctx is FormattedTextContext {
return true;
}
}
/**
* Text formatter component that is used to convert a markdown text into HTML text
* Supported formats: bold text, italic text, unordered list (one level only)
*/
@Component({
selector: 'gc-text-formatter',
templateUrl: './text-formatter.component.html',
styleUrls: [
'../../utils/styles/reset-list.css',
'./text-formatter.component.css',
],
})
export class TextFormatterComponent {
/**
* Sets data-gc-typography
* Default: 'label'
*/
@Input()
public typography: Typography = 'label';
/**
* Input text in markdown format that will get converted and rendered
*/
@Input()
public get markdownText(): string {
return this._markdownText;
}
public set markdownText(newText: string) {
this._markdownText = newText;
this.formattedText = this.convert(newText);
}
/** @ignore */
protected formattedText: FormattedText = [];
/** @ignore */
private _markdownText = '';
/** @ignore */
private convert(text: string): FormattedText {
let parts: FormattedText = [];
const mdReg = new RegExp(
MDList.source +
'|' +
MDBold.source +
'|' +
MDItalic.source +
'|' +
MDEmptyLine.source,
'm',
);
const match: ReturnType<typeof mdReg.exec> = mdReg.exec(text);
if (match === null) {
parts.push({ kind: 'text', text: text });
return parts;
} else {
// store text before the first match
if (match.index > 0) {
parts = [...parts, ...this.convert(text.slice(0, match.index))];
}
if (match.groups?.list) {
const enumList: FormattedText[] = [];
match[0].split('\n').forEach(line => {
const textonly = line.replace('* ', '').trim();
if (textonly.length > 0) {
enumList.push(this.convert(textonly));
}
});
parts.push({ kind: 'ul', liArray: enumList });
} else if (match.groups?.br) {
parts.push({ kind: 'br' });
} else if (match.groups?.bold) {
parts.push({ kind: 'bold', text: this.convert(match.groups.bold) });
} else if (match.groups?.italic) {
parts.push({ kind: 'italic', text: this.convert(match.groups.italic) });
}
text = text.slice(match.index + match[0].length);
// store text following after the last match
if (text.length > 0) {
parts = [...parts, ...this.convert(text)];
}
}
return parts;
}
}
|