async function sendText()

in src/maps_planner/index.ts [448:534]
54 lines of code
12 McCabe index (conditional complexity)

async function sendText(prompt: string) {
  spinner.classList.remove('hidden');
  errorMessage.innerHTML = '';
  restart();
  const buttonEl = document.getElementById('generate') as HTMLButtonElement;

  try {
    let finalPrompt = prompt;
    if (isPlannerMode) {
      finalPrompt = prompt + ' day trip';
    }

    const updatedInstructions = isPlannerMode
      ? systemInstructions.replace('DAY_PLANNER_MODE', 'true')
      : systemInstructions.replace('DAY_PLANNER_MODE', 'false');

    const response = await ai.models.generateContentStream({
      model: 'gemini-2.0-flash-exp',
      contents: finalPrompt,
      config: {
        systemInstruction: updatedInstructions,
        temperature: 1,
        tools: [
          {
            functionDeclarations: [
              locationFunctionDeclaration,
              lineFunctionDeclaration,
            ],
          },
        ],
      },
    });

    let text = '';
    let results = false;
    for await (const chunk of response) {
      const fns = chunk.functionCalls ?? [];
      for (const fn of fns) {
        if (fn.name === 'location') {
          setPin(fn.args);
          results = true;
        }
        if (fn.name === 'line') {
          setLeg(fn.args);
          results = true;
        }
      }

      if (
        chunk.candidates &&
        chunk.candidates.length > 0 &&
        chunk.candidates[0].content &&
        chunk.candidates[0].content.parts
      ) {
        chunk.candidates[0].content.parts.forEach((part) => {
          if (part.text) text += part.text;
        });
      } else if (chunk.text) {
        text += chunk.text;
      }
    }

    if (!results) {
      throw new Error(
        'Could not generate any results. Try again, or try a different prompt.',
      );
    }

    if (isPlannerMode && dayPlanItinerary.length > 0) {
      dayPlanItinerary.sort(
        (a, b) =>
          (a.sequence || Infinity) - (b.sequence || Infinity) ||
          (a.time || '').localeCompare(b.time || ''),
      );
      createTimeline();
      showTimeline();
    }

    createLocationCards();
  } catch (e) {
    errorMessage.innerHTML = e.message;
    console.error('Error generating content:', e);
  } finally {
    buttonEl.classList.remove('loading');
  }
  spinner.classList.add('hidden');
}