61 lines
1.7 KiB
TypeScript
61 lines
1.7 KiB
TypeScript
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function asRecord(value: unknown): Record<string, unknown> | null {
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return value && typeof value === 'object' && !Array.isArray(value)
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? value as Record<string, unknown>
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: null;
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}
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function parseJsonRecord(value: string): Record<string, unknown> | null {
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try {
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const parsed = JSON.parse(value) as unknown;
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return parseResultPayload(parsed);
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} catch {
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return null;
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}
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}
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function looksLikeJson(value: string): boolean {
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const trimmed = value.trim();
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return trimmed.startsWith('{') || trimmed.startsWith('[');
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}
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function unwrapMcpTextEnvelope(value: unknown): unknown {
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if (Array.isArray(value)) {
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const textPart = value.find((entry) => {
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const record = asRecord(entry);
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return record?.type === 'text' && typeof record.text === 'string';
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});
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const record = asRecord(textPart);
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return typeof record?.text === 'string' ? record.text : value;
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}
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const record = asRecord(value);
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if (record?.type === 'text' && typeof record.text === 'string') {
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return record.text;
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}
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if (Array.isArray(record?.content)) {
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return unwrapMcpTextEnvelope(record.content);
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}
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if (typeof record?.content === 'string' && looksLikeJson(record.content)) {
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return record.content;
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}
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if (typeof record?.detailedContent === 'string' && looksLikeJson(record.detailedContent)) {
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return record.detailedContent;
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}
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if (Array.isArray(record?.contents)) {
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return unwrapMcpTextEnvelope(record.contents);
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}
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return value;
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}
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export function parseResultPayload(result: unknown): Record<string, unknown> | null {
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if (result == null) return null;
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const unwrapped = unwrapMcpTextEnvelope(result);
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if (typeof unwrapped === 'string') {
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return parseJsonRecord(unwrapped);
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}
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return asRecord(unwrapped);
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}
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