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utils.ts
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utils.ts
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import { IAstNode } from "./model/model";
import { isTokenNode, isRuleNode } from "./model/model";
import { IToken } from "chevrotain";
const mdurl = require("mdurl");
const punycode = require("punycode");
// taken from: https://github.com/markdown-it/markdown-it/blob/master/lib/common/utils.js
const HTML_ESCAPE_TEST_RE = /[&<>"]/;
const HTML_ESCAPE_REPLACE_RE = /[&<>"]/g;
const HTML_REPLACEMENTS: { [char: string]: string } = {
"&": "&",
"<": "<",
">": ">",
'"': """
};
const replaceUnsafeChar = (ch: string): string => {
return HTML_REPLACEMENTS[ch];
};
export const escapeHtml = (str: string): string => {
if (HTML_ESCAPE_TEST_RE.test(str)) {
return str.replace(HTML_ESCAPE_REPLACE_RE, replaceUnsafeChar);
}
return str;
};
const COLOR = /(^#[0-9A-F]{6}$)|(^#[0-9A-F]{3}$)/i;
export const validateColorString = (str: string): boolean => {
return COLOR.test(str);
};
// taken from https://github.com/markdown-it/markdown-it/blob/master/lib/index.js
////////////////////////////////////////////////////////////////////////////////
//
// This validator can prohibit more than really needed to prevent XSS. It's a
// tradeoff to keep code simple and to be secure by default.
//
// If you need different setup - override validator method as you wish. Or
// replace it with dummy function and use external sanitizer.
//
const BAD_PROTO_WITHOUT_FILE_RE = /^(vbscript|javascript|data):/;
const BAD_PROTO_RE = /^(vbscript|javascript|file|data):/;
const GOOD_DATA_RE = /^data:image\/(gif|png|jpeg|webp);/;
export const validateLink = (url: string, allowFile: boolean): boolean => {
// url should be normalized at this point, and existing entities are decoded
var str = url.trim().toLowerCase();
var proto_re = allowFile ? BAD_PROTO_WITHOUT_FILE_RE : BAD_PROTO_RE;
return proto_re.test(str) ? (GOOD_DATA_RE.test(str) ? true : false) : true;
};
////////////////////////////////////////////////////////////////////////////////
const RECODE_HOSTNAME_FOR = ["http:", "https:", "mailto:"];
export const normalizeLink = (url: string): string => {
var parsed = mdurl.parse(url, true);
if (parsed.hostname) {
// Encode hostnames in urls like:
// `http://host/`, `https://host/`, `mailto:user@host`, `//host/`
//
// We don't encode unknown schemas, because it's likely that we encode
// something we shouldn't (e.g. `skype:name` treated as `skype:host`)
//
if (!parsed.protocol || RECODE_HOSTNAME_FOR.indexOf(parsed.protocol) >= 0) {
try {
parsed.hostname = punycode.toASCII(parsed.hostname);
} catch (er) {
/**/
}
}
}
return mdurl.encode(mdurl.format(parsed));
};
export const normalizeLinkText = (url: string): string => {
var parsed = mdurl.parse(url, true);
if (parsed.hostname) {
// Encode hostnames in urls like:
// `http://host/`, `https://host/`, `mailto:user@host`, `//host/`
//
// We don't encode unknown schemas, because it's likely that we encode
// something we shouldn't (e.g. `skype:name` treated as `skype:host`)
//
if (!parsed.protocol || RECODE_HOSTNAME_FOR.indexOf(parsed.protocol) >= 0) {
try {
parsed.hostname = punycode.toUnicode(parsed.hostname);
} catch (er) {
/**/
}
}
}
return mdurl.decode(mdurl.format(parsed));
};
////////////////////////////////////////////////////////////////////////////////////
// ARGDOWN Utils
export const stringToHtmlId = (str: string): string => {
let id = str;
id = id.toLowerCase();
id = id.replace(/ä/g, "ae");
id = id.replace(/ö/g, "oe");
id = id.replace(/ü/g, "ue");
id = id.replace(/ß/g, "ss");
id = id.replace(/\s/g, "-");
id = id.replace(/[^a-z0-9\-]/g, "");
return id;
};
export const stringToClassName = (str: string): string => stringToHtmlId(str);
/// Returns a html id of the form "type-title".
/// If htmlIdsSet is not null, creates an id that is not already a member of the set.
/// Example: If "statement-s1" is already a member of the set, it will return "statement-s1-occurrence-2".
/// Note that you still have to add the new id to the set yourself if you want to avoid duplicates.
export const getHtmlId = (type: string, title: string, htmlIdsSet?: { [id: string]: boolean }): string => {
let id = type + "-" + title;
id = stringToHtmlId(id);
if (htmlIdsSet) {
let originalId = id;
let i = 1;
while (htmlIdsSet[id]) {
i++;
id = originalId + "-occurrence-" + i;
}
}
return id;
};
export const reduceToMap = <K, V extends object>(a: V[], idProvider: (curr: V) => K): Map<K, V> => {
return a.reduce((acc, curr): Map<K, V> => {
acc.set(idProvider(curr), curr);
return acc;
}, new Map<K, V>());
};
export const tokensToString = (tokens: IToken[]): string => {
let str = "";
for (let token of tokens) {
if (token.tokenType) {
str += token.tokenType.tokenName + " " + token.image + "\n";
}
}
return str;
};
export const tokenLocationsToString = (tokens: IToken[]): string => {
let str = "";
for (let token of tokens) {
if (!token.tokenType) {
continue;
}
str += token.tokenType.tokenName + " " + token.image + "\n";
str +=
"startOffset: " +
token.startOffset +
" endOffset: " +
token.endOffset +
" startLine: " +
token.startLine +
" endLine: " +
token.endLine +
" startColumn: " +
token.startColumn +
" endColumn: " +
token.endColumn +
"\n\n";
}
return str;
};
export const astToString = (ast: IAstNode): string => {
return logAstRecursively(ast, "", "");
};
export const astToJsonString = (ast: IAstNode[]): string => {
return JSON.stringify(ast, null, 2);
};
const logAstRecursively = (value: IAstNode, pre: string, str: string): string => {
if (value === undefined) {
str += "undefined";
return str;
} else if (isTokenNode(value)) {
str += value.tokenType!.tokenName;
return str;
} else if (isRuleNode(value)) {
str += value.name;
if (value.children && value.children.length > 0) {
let nextPre = pre + " |";
for (let child of value.children) {
str += "\n" + nextPre + "__";
str = logAstRecursively(child, nextPre, str);
}
str += "\n" + pre;
}
}
return str;
};
export const isNumber = (x: any): x is number => {
return typeof x === "number";
};
export const isString = (x: any): x is string => {
return typeof x === "string";
};
export const isObject = (x: any): x is object => {
return typeof x === "object";
};