Function parsedObjectToToolCall

src/llm/text-tool-recovery.ts:388–431

Convert a parsed JSON object into a ToolCall iff its shape and tool name are recognized.

(obj: any, knownToolNames: ReadonlySet<string>)

/** Convert a parsed JSON object into a ToolCall iff its shape and tool name are recognized. */
function parsedObjectToToolCall(obj: any, knownToolNames: ReadonlySet<string>): ToolCall | null {
  if (!obj || typeof obj !== 'object') return null;

  // Shape 1: { name, arguments | parameters | input }
  if (typeof obj.name === 'string' && knownToolNames.has(obj.name)) {
    const args = obj.arguments ?? obj.parameters ?? obj.input ?? {};
    return {
      id: typeof obj.id === 'string' ? obj.id : `recovered_${Date.now()}_${Math.floor(Math.random() * 1000)}`,
      type: 'function',
      function: {
        name: obj.name,
        arguments: typeof args === 'string' ? args : JSON.stringify(args),
      },
    };
  }

  // Shape 2: { function: { name, arguments } }  (OpenAI legacy)
  if (obj.function && typeof obj.function.name === 'string' && knownToolNames.has(obj.function.name)) {
    const args = obj.function.arguments ?? {};
    return {
      id: typeof obj.id === 'string' ? obj.id : `recovered_${Date.now()}_${Math.floor(Math.random() * 1000)}`,
      type: 'function',
      function: {
        name: obj.function.name,
        arguments: typeof args === 'string' ? args : JSON.stringify(args),
      },
    };
  }

  // Shape 3: { tool, args } (Claude-style)
  if (typeof obj.tool === 'string' && knownToolNames.has(obj.tool)) {
    const args = obj.args ?? obj.arguments ?? obj.parameters ?? {};
    return {
      id: typeof obj.id === 'string' ? obj.id : `recovered_${Date.now()}_${Math.floor(Math.random() * 1000)}`,
      type: 'function',
      function: {
        name: obj.tool,
        arguments: typeof args === 'string' ? args : JSON.stringify(args),
      },
    };
  }

  return null;
}

/** Find the first balanced JSON object in a string (depth-counting on braces, respecting strings). */
function findFirstJsonObject(text: string): string | null {