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huncholanehuncholane/moonregexPublic

A better version of regex 101

moonregex/src/builder.js
36 lines1.0 KBJavaScript
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1export const parseBuilder = (str) => {
2 let lines = str.split("\n");
3 const ref = {};
4 for (let line of lines) {
5 const lineData =
6 /^(?<tabs>\s*)(?<name>\w*)(?<optional>\??):(?<regex>.*)/.exec(
7 line
8 ).groups;
9 const tabs = lineData.tabs.length;
10 if (!ref[tabs]) ref[tabs] = [lineData];
11 else ref[tabs].push(lineData);
12 if (tabs) {
13 const parentRefInd = ref[tabs - 1].length - 1;
14 let parent = ref[tabs - 1][parentRefInd];
15 if (!parent.children) parent.children = [lineData];
16 else parent.children.push(lineData);
17 }
18 }
19 return ref[0];
20};
21
22export const buildToRegex = (build) => {
23 const re = buildToRegexRecursion(build, "");
24 return re;
25};
26
27const buildToRegexRecursion = (build, re) => {
28 if (!build?.length) return re;
29 const val = build.shift();
30 if (val.name) re += `(?P<${val.name}>${val.regex}`;
31 else re += `(?:${val.regex}`;
32 if (val.children) re += buildToRegexRecursion(val.children, "");
33 re += `${val.optional})`;
34
35 return buildToRegexRecursion(build, re);
36};