wehub-resource-sync
44 lines
1.2 KiB
TypeScript
44 lines
1.2 KiB
TypeScript
/**
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* Split a stream that concatenates multiple top-level JSON objects with no
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* delimiter between them (as some TTS providers emit) into the individual
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* `{...}` substrings, in order.
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*
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* Brace counting is **string-aware**: a `{` or `}` inside a JSON string literal
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* — including past an escaped quote — is ignored, so an object whose value
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* contains a brace, e.g. `{"message":"bad {input}"}`, is not split in the
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* middle. Unbalanced trailing input (a half-received object) is dropped.
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*/
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export function splitConcatenatedJsonObjects(text: string): string[] {
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const objects: string[] = [];
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let depth = 0;
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let start = -1;
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let inString = false;
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let escaped = false;
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for (let i = 0; i < text.length; i++) {
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const char = text[i];
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if (inString) {
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if (escaped) escaped = false;
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else if (char === '\\') escaped = true;
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else if (char === '"') inString = false;
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continue;
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}
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if (char === '"') {
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inString = true;
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} else if (char === '{') {
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if (depth === 0) start = i;
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depth += 1;
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} else if (char === '}' && depth > 0) {
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depth -= 1;
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if (depth === 0 && start >= 0) {
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objects.push(text.slice(start, i + 1));
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start = -1;
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}
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}
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}
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return objects;
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}
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