98 lines
2.8 KiB
TypeScript
98 lines
2.8 KiB
TypeScript
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import { Anchor, Href, BoolHash, AltText } from './Model';
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export class Util {
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private static regexLib: { [name: string]: RegExp } = {
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anchors: /(\[((?:[^\[\]]+|\[(?:[^\[\]]+|\[(?:[^\[\]]+|\[(?:[^\[\]]+|\[(?:[^\[\]]+|\[(?:[^\[\]]+|\[\])*\])*\])*\])*\])*\])*)\]\([ ]*((?:[^()\s]+|\((?:[^()\s]+|\((?:[^()\s]+|\((?:[^()\s]+|\((?:[^()\s]+|\((?:[^()\s]+|\(\))*\))*\))*\))*\))*\))*)[ ]*((['"])(.*?)\5[ ]*)?\))/gm,
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href: /^(?:\/([a-zA-Z](?:-?[a-zA-Z0-9])*))?(?:\?((?:!?[a-zA-Z](?:-?[a-zA-Z0-9])*)(?:&!?[a-zA-Z](?:-?[a-zA-Z0-9])*)*)?)?(?:#((?:[a-zA-Z](?:-?[a-zA-Z0-9])*)(?:\+[a-zA-Z](?:-?[a-zA-Z0-9])*)*))?$/,
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trim: /^\s+|\s+$/g,
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altText: /^((?:[^|\\]|\\.)*)(?:\|((?:[^|\\]|\\.)+))?$/,
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escapeChar: /\\(?=[^\\])/g,
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emptyListItem: /^[ ]*-\s*([\r\n]+|$)/gm,
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};
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private static matchToAnchor(match: RegExpExecArray): Anchor {
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const result: Anchor = {
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anchor: match[1],
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text: match[2],
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href: match[3],
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title: match[6],
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};
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if(result.href.indexOf('"') === 0) {
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result.title = result.href.substring(1, result.href.length - 1);
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result.href = '';
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}
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return result;
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}
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public static matchAnchor(text: string): Anchor | undefined {
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const match = this.regexLib.anchors.exec(text);
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if(match) return this.matchToAnchor(match);
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}
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public static matchAnchors(text: string): Anchor[] {
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let match: RegExpExecArray | null;
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const anchors: Anchor[] = [];
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while(match = this.regexLib.anchors.exec(text)) {
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anchors.push(this.matchToAnchor(match));
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}
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return anchors;
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}
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public static matchHref(text: string): Href | undefined {
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const match = this.regexLib.href.exec(text);
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if(match) {
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return {
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target: match[1],
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conditions: match[2],
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toggles: match[3],
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};
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}
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}
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public static trimText(text: string): string {
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return text.replace(this.regexLib.trim, '');
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}
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public static normalize(text: string): string {
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return text.toLowerCase().replace(/^\W+|\W+$/g, '').replace(/\W+/g, '-');
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}
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public static toBoolHash(names: string[]): BoolHash | undefined {
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if(names) {
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const hash: BoolHash = {};
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for(let name of names) {
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if(name.indexOf('!') === 0) {
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hash[name.substring(1, name.length)] = false;
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} else {
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hash[name] = true;
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}
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}
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return hash;
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}
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}
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public static conditionsMet(state: BoolHash, conditions: BoolHash): boolean {
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for(let [cond, val] of Object.entries(conditions)) {
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if((val && !state[cond]) || (!val && state[cond])) {
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return false;
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}
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}
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return true;
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}
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public static splitAltText(text: string): AltText | undefined {
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const match = this.regexLib.altText.exec(text);
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if(match) {
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return {
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passed: match[0],
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failed: match[1],
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};
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}
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}
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}
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