Update app.py

app.py

@@ -1,6 +1,5 @@
-## 1. `app.py`
-```python
-# app.py: Workshop-in-a-Box Hugging Face Space with TTS and Slide Previews
+
+# app.py: Workshop-in-a-Box Space with OpenTTS & Live Slide Previews
 import os
 import json
 import tempfile
@@ -10,8 +9,24 @@ import gradio as gr
 from agents import Agent, AgentRunner, handoff
 from agents.extensions.handoff_prompt import RECOMMENDED_PROMPT_PREFIX
 
-# Import your TTS/voice API module
-from your_tts_module import generate_tts_audio  # implement to return path to .mp3/.wav
+# OpenTTS client
+from open_tts import OpenTTSClient
+
+# Initialize OpenTTS with your server URL (set via env var or default localhost)
+opentts = OpenTTSClient(api_url=os.getenv("OPENTTS_API_URL", "http://localhost:5500"))
+
+def generate_tts_audio(script: str) -> str:
+    """
+    Synthesize speech using OpenTTS and save to a temp MP3 file.
+    Returns the local file path to the audio.
+    """
+    # Request synthesis (voice and format can be configured)
+    audio_bytes = opentts.synthesize(text=script, voice="alloy", format="mp3")
+    # Write to a temp file
+    out_path = os.path.join(tempfile.gettempdir(), "voiceover.mp3")
+    with open(out_path, "wb") as f:
+        f.write(audio_bytes)
+    return out_path
 
 # --- Multi-Agent Scaffold ---
 # 1. Topic Agent
@@ -55,7 +70,7 @@ voice_agent = Agent(
     name="Voiceover Agent",
     instructions=(
         f"{RECOMMENDED_PROMPT_PREFIX}\n"
-        "Create a 1-2 minute voiceover script. Return JSON with keys 'script' and optionally 'audio_url'."
+        "Create a 1-2 minute voiceover script. Return JSON with keys 'script'."
     )
 )
 
@@ -63,7 +78,7 @@ voice_agent = Agent(
 document_orchestrator = Agent(
     name="Workshop Orchestrator",
     instructions=(
-        "Invoke sub-agents: topic_agent, content_agent, slide_agent, code_agent, voice_agent (optional); collect outputs."
+        "Invoke: topic_agent, content_agent, slide_agent, code_agent, voice_agent (optional); collect outputs."
     ),
     handoffs=[
         handoff(topic_agent, name="outline"),
@@ -76,15 +91,15 @@ document_orchestrator = Agent(
 
 runner = AgentRunner()
 
-# --- Helper: Run pipeline and create outputs ---
+# --- Helper: Run pipeline & bundle outputs ---
 def build_workshop_bundle(topic: str, audience: str):
     prompt = f"Create a {topic} workshop for {audience}."
     results = runner.run(document_orchestrator, prompt).outputs
 
-    # TTS audio
+    # Synthesize voiceover if script present
     voice_info = results.get('voiceover', {})
     audio_path = None
-    if 'script' in voice_info:
+    if isinstance(voice_info, dict) and 'script' in voice_info:
         audio_path = generate_tts_audio(voice_info['script'])
 
     # Render slides to HTML
@@ -93,37 +108,56 @@ def build_workshop_bundle(topic: str, audience: str):
         template = f.read()
     slide_html = template.replace('{{SLIDES_JSON}}', json.dumps(slides_json))
 
-    # Create ZIP
-    tmp = tempfile.mkdtemp()
-    zipf_path = os.path.join(tmp, 'workshop_bundle.zip')
-    with ZipFile(zipf_path, 'w') as z:
-        for name, data in [
-            ('workshop_outputs.json', json.dumps(results, indent=2)),
-            ('slides.json', json.dumps(slides_json, indent=2)),
-            ('slides.html', slide_html),
-            ('code_labs.py', results.get('code_labs', ''))
-        ]:
-            p = os.path.join(tmp, name)
-            with open(p, 'w') as f: f.write(data)
-            z.write(p, arcname=name)
+    # Create a ZIP bundle
+    tmpdir = tempfile.mkdtemp()
+    zip_path = os.path.join(tmpdir, 'workshop_bundle.zip')
+    with ZipFile(zip_path, 'w') as zipf:
+        # JSON outputs
+        out_json = os.path.join(tmpdir, 'workshop_outputs.json')
+        with open(out_json, 'w') as jf:
+            jf.write(json.dumps(results, indent=2))
+        zipf.write(out_json, 'workshop_outputs.json')
+
+        # Slides
+        slides_file = os.path.join(tmpdir, 'slides.json')
+        with open(slides_file, 'w') as sf:
+            sf.write(json.dumps(slides_json, indent=2))
+        zipf.write(slides_file, 'slides.json')
+
+        slide_html_file = os.path.join(tmpdir, 'slides.html')
+        with open(slide_html_file, 'w') as hf:
+            hf.write(slide_html)
+        zipf.write(slide_html_file, 'slides.html')
+
+        # Code labs
+        code_file = os.path.join(tmpdir, 'code_labs.py')
+        with open(code_file, 'w') as cf:
+            cf.write(results.get('code_labs', ''))
+        zipf.write(code_file, 'code_labs.py')
+
+        # Audio
         if audio_path and os.path.exists(audio_path):
-            z.write(audio_path, arcname=os.path.basename(audio_path))
-    return slide_html, audio_path, zipf_path
+            zipf.write(audio_path, os.path.basename(audio_path))
+
+    return slide_html, audio_path, zip_path
 
 # --- Gradio UI ---
 def run_app(topic, audience):
-    slide_html, audio_path, zip_path = build_workshop_bundle(topic, audience)
-    return slide_html, audio_path, zip_path
+    return build_workshop_bundle(topic, audience)
 
-with gr.Blocks(title='Workshop in a Box') as demo:
-    gr.Markdown('# 🚀 Workshop in a Box')
-    topic = gr.Textbox(label='Workshop Topic')
-    audience = gr.Textbox(label='Audience')
+with gr.Blocks(title='🚀 Workshop in a Box') as demo:
+    gr.Markdown('# Workshop in a Box')
+    topic = gr.Textbox(label='Workshop Topic', placeholder='e.g., AI Agents 101')
+    audience = gr.Textbox(label='Audience', placeholder='e.g., Product Managers')
     btn = gr.Button('Generate Workshop')
-    slide_preview = gr.HTML()
-    audio_player = gr.Audio(interactive=True)
-    download = gr.File()
-    btn.click(run_app, [topic, audience], [slide_preview, audio_player, download])
+    slide_preview = gr.HTML(label='Slide Preview')
+    audio_player = gr.Audio(label='Voiceover Preview', interactive=True)
+    download = gr.File(label='Download ZIP')
+    btn.click(
+        fn=run_app,
+        inputs=[topic, audience],
+        outputs=[slide_preview, audio_player, download]
+    )
 
 if __name__ == '__main__':
     demo.launch()