| 1 | "use strict";
|
| 2 | Object.defineProperty(exports, "__esModule", { value: true });
|
| 3 |
|
| 4 | function iterator() {
|
| 5 | const ids = [];
|
| 6 | let inAnnex = false;
|
| 7 | let currentLevel = 0;
|
| 8 | return {
|
| 9 | next(level, annex) {
|
| 10 | if (inAnnex && !annex)
|
| 11 | throw new Error('Clauses cannot follow annexes');
|
| 12 | if (level - currentLevel > 1)
|
| 13 | throw new Error('Skipped clause');
|
| 14 | const nextNum = annex ? nextAnnexNum : nextClauseNum;
|
| 15 | if (level === currentLevel) {
|
| 16 | ids[currentLevel] = nextNum(level);
|
| 17 | }
|
| 18 | else if (level > currentLevel) {
|
| 19 | ids.push(nextNum(level));
|
| 20 | }
|
| 21 | else {
|
| 22 | ids.length = level + 1;
|
| 23 | ids[level] = nextNum(level);
|
| 24 | }
|
| 25 | currentLevel = level;
|
| 26 | return { value: ids.join('.'), done: false };
|
| 27 | },
|
| 28 | };
|
| 29 | function nextAnnexNum(level) {
|
| 30 | if (!inAnnex) {
|
| 31 | if (level > 0)
|
| 32 | throw new Error('First annex must be at depth 0');
|
| 33 | inAnnex = true;
|
| 34 | return 'A';
|
| 35 | }
|
| 36 | if (level === 0) {
|
| 37 | return String.fromCharCode(ids[0].charCodeAt(0) + 1);
|
| 38 | }
|
| 39 | return nextClauseNum(level);
|
| 40 | }
|
| 41 | function nextClauseNum(level) {
|
| 42 | if (ids[level] === undefined)
|
| 43 | return 1;
|
| 44 | return ids[level] + 1;
|
| 45 | }
|
| 46 | }
|
| 47 | exports.default = iterator;
|