| 1 | import { DOWN, UP, SAME } from "./characters";
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| 2 | export const serializeTrie = (root) => {
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| 3 | let serialized = "";
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| 4 | const queue = Array.from(root.children.values());
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| 5 | let current;
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| 6 | while ((current = queue.shift()) !== undefined) {
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| 7 | if (current === UP) {
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| 8 | serialized += UP;
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| 9 | continue;
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| 10 | }
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| 11 | serialized += current.label;
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| 12 | if (current.children.size === 0) {
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| 13 | if (queue.length > 0 && queue[0] !== UP) {
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| 14 | serialized += SAME;
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| 15 | }
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| 16 | continue;
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| 17 | }
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| 18 | serialized += DOWN;
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| 19 | const newItems = Array.from(current.children.values());
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| 20 | if (queue.length > 0) {
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| 21 | newItems.push(UP);
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| 22 | }
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| 23 | queue.unshift(...newItems);
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| 24 | }
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| 25 | return serialized;
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| 26 | };
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| 27 | |
| \ | No newline at end of file |