@imhonglu/pattern-builder
Version:
Type-safe regular expression pattern builder for TypeScript with fluent API
105 lines (104 loc) • 2.67 kB
JavaScript
"use strict";
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
for (var name in all)
__defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
if (from && typeof from === "object" || typeof from === "function") {
for (let key of __getOwnPropNames(from))
if (!__hasOwnProp.call(to, key) && key !== except)
__defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
}
return to;
};
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
var pattern_builder_exports = {};
__export(pattern_builder_exports, {
PatternBuilder: () => PatternBuilder
});
module.exports = __toCommonJS(pattern_builder_exports);
class PatternBuilder {
constructor(source) {
this.source = source;
}
anchor(position) {
switch (position) {
case "start":
this.source = `^${this.source}`;
break;
case "end":
this.source = `${this.source}$`;
break;
default:
this.source = `^${this.source}$`;
break;
}
return this;
}
group() {
this.source = `(${this.source})`;
return this;
}
nonCapturingGroup() {
this.source = `(?:${this.source})`;
return this;
}
lookahead() {
this.source = `(?=${this.source})`;
return this;
}
negateLookahead() {
this.source = `(?!${this.source})`;
return this;
}
lookbehind() {
this.source = `(?<=${this.source})`;
return this;
}
negateLookbehind() {
this.source = `(?<!${this.source})`;
return this;
}
// quantifier
oneOrMore() {
this.source = `${this.source}+`;
return this;
}
zeroOrMore() {
this.source = `${this.source}*`;
return this;
}
exact(count) {
this.source = `${this.source}{${count}}`;
return this;
}
repeat(min, max) {
this.source = `${this.source}{${min},${max !== null && max !== void 0 ? max : ""}}`;
return this;
}
optional() {
this.source = `${this.source}?`;
return this;
}
clone() {
return new PatternBuilder(this.source);
}
toString() {
return this.source;
}
toRegExp(...flags) {
const pattern = this.toString();
const flag = flags.join("");
try {
return new RegExp(pattern, flag);
} catch (error) {
throw new Error(`Failed to create RegExp from "${pattern}" with flags "${flag}"`, {
cause: error
});
}
}
}