Calendar integration: add timezone config and fix tool call parsing

- Add timezone field to CalendarConfig for local timezone support
- Update CustomProvider to parse calendar tool calls from JSON in LLM responses
- Add pytz dependency to pyproject.toml for timezone handling

nanobot/config/schema.py

@@ -252,6 +252,7 @@ class CalendarConfig(Base):
     token_file: str = ""  # Path to store OAuth2 token (default: ~/.nanobot/calendar_token.json)
     calendar_id: str = "primary"  # Calendar ID to use (default: primary calendar)
     auto_schedule_from_email: bool = True  # Automatically schedule meetings from emails
+    timezone: str = "UTC"  # Timezone for parsing times (e.g., "America/New_York", "Europe/London", "UTC")
 
 
 class ExecToolConfig(Base):

nanobot/providers/custom_provider.py

@@ -62,22 +62,37 @@ class CustomProvider(LLMProvider):
         # If no structured tool calls, try to parse from content (Ollama sometimes returns JSON in content)
         # Only parse if content looks like it contains a tool call JSON (to avoid false positives)
         content = msg.content or ""
-        if not tool_calls and content and '"name"' in content and '"parameters"' in content:
+        # Check for standard format: {"name": "...", "parameters": {...}}
+        has_standard_format = '"name"' in content and '"parameters"' in content
+        # Check for calendar tool format: {"action": "...", ...}
+        has_calendar_format = '"action"' in content and ("calendar" in content.lower() or any(action in content for action in ["list_events", "create_event", "update_event", "delete_event"]))
+        
+        if not tool_calls and content and (has_standard_format or has_calendar_format):
             import re
-            # Look for JSON tool call patterns: {"name": "exec", "parameters": {...}}
+            # Look for JSON tool call patterns: {"name": "exec", "parameters": {...}} or {"action": "list_events", ...}
             # Find complete JSON objects by matching braces
-            pattern = r'\{\s*"name"\s*:\s*"(\w+)"'
+            # Try "action" pattern first (for calendar tool), then "name" pattern
+            patterns = [
+                (r'\{\s*"action"\s*:\s*"(\w+)"', "action"),  # Calendar tool format
+                (r'\{\s*"name"\s*:\s*"(\w+)"', "name"),     # Standard format
+            ]
             start_pos = 0
-            max_iterations = 5  # Safety limit
+            max_iterations = 10  # Increased for multiple patterns
             iteration = 0
             while iteration < max_iterations:
                 iteration += 1
-                match = re.search(pattern, content[start_pos:])
+                match = None
+                pattern_type = None
+                for pattern, ptype in patterns:
+                    match = re.search(pattern, content[start_pos:])
+                    if match:
+                        pattern_type = ptype
+                        break
                 if not match:
                     break
                 
                 json_start = start_pos + match.start()
-                name = match.group(1)
+                key_value = match.group(1)
                 
                 # Find the matching closing brace by counting braces
                 brace_count = 0
@@ -98,7 +113,24 @@ class CustomProvider(LLMProvider):
                     try:
                         json_str = content[json_start:json_end]
                         tool_obj = json_repair.loads(json_str)
-                        # Only accept if it has both name and parameters, and name is a valid tool name
+                        
+                        # Handle calendar tool format: {"action": "...", ...}
+                        if isinstance(tool_obj, dict) and "action" in tool_obj:
+                            # This is a calendar tool call in JSON format
+                            action = tool_obj.get("action")
+                            if action and action in ["list_events", "create_event", "update_event", "delete_event", "delete_events", "check_availability"]:
+                                # Convert to calendar tool call format
+                                tool_calls.append(ToolCallRequest(
+                                    id=f"call_{len(tool_calls)}",
+                                    name="calendar",
+                                    arguments=tool_obj  # Pass the whole object as arguments
+                                ))
+                                # Remove the tool call from content
+                                content = content[:json_start] + content[json_end:].strip()
+                                start_pos = json_start  # Stay at same position since we removed text
+                                continue
+                        
+                        # Handle standard format: {"name": "...", "parameters": {...}}
                         # Note: This list should match tools registered in AgentLoop._register_default_tools()
                         valid_tools = [
                             # File tools

pyproject.toml

@@ -46,6 +46,7 @@ dependencies = [
     "google-api-python-client>=2.0.0",
     "google-auth-httplib2>=0.2.0",
     "google-auth-oauthlib>=1.0.0",
+    "pytz>=2024.1",
 ]
 
 [project.optional-dependencies]