Files
FastGPT/packages/global/common/string/markdown.ts
2023-12-27 11:07:39 +08:00

75 lines
1.9 KiB
TypeScript

import { simpleText } from './tools';
/* Delete redundant text in markdown */
export const simpleMarkdownText = (rawText: string) => {
rawText = simpleText(rawText);
// Remove a line feed from a hyperlink or picture
rawText = rawText.replace(/\[([^\]]+)\]\((.+?)\)/g, (match, linkText, url) => {
const cleanedLinkText = linkText.replace(/\n/g, ' ').trim();
if (!url) {
return '';
}
return `[${cleanedLinkText}](${url})`;
});
// replace special \.* ……
const reg1 = /\\([-.!`_(){}\[\]])/g;
if (reg1.test(rawText)) {
rawText = rawText.replace(/\\([`!*()+-_\[\]{}\\.])/g, '$1');
}
// replace \\n
rawText = rawText.replace(/\\\\n/g, '\\n');
// Remove headings and code blocks front spaces
['####', '###', '##', '#', '```', '~~~'].forEach((item, i) => {
const reg = new RegExp(`\\n\\s*${item}`, 'g');
if (reg.test(rawText)) {
rawText = rawText.replace(new RegExp(`(\\n)( *)(${item})`, 'g'), '$1$3');
}
});
return rawText.trim();
};
/**
* format markdown
* 1. upload base64
* 2. replace \
*/
export const uploadMarkdownBase64 = async ({
rawText,
uploadImgController
}: {
rawText: string;
uploadImgController: (base64: string) => Promise<string>;
}) => {
// match base64, upload and replace it
const base64Regex = /data:image\/.*;base64,([^\)]+)/g;
const base64Arr = rawText.match(base64Regex) || [];
// upload base64 and replace it
await Promise.all(
base64Arr.map(async (base64Img) => {
try {
const str = await uploadImgController(base64Img);
rawText = rawText.replace(base64Img, str);
} catch (error) {
rawText = rawText.replace(base64Img, '');
rawText = rawText.replace(/!\[.*\]\(\)/g, '');
}
})
);
// Remove white space on both sides of the picture
const trimReg = /(!\[.*\]\(.*\))\s*/g;
if (trimReg.test(rawText)) {
rawText = rawText.replace(trimReg, '$1');
}
return simpleMarkdownText(rawText);
};