132 lines
5.5 KiB
Python
132 lines
5.5 KiB
Python
from datetime import datetime
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import xml.etree.ElementTree as ET
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from typing import Union
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from .util import format_timestamp
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from .command import Command
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from .delete_command import DeleteCommand
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from .stop_command import StopCommand
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from .entry.background_entry import BackgroundEntry
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from .entry import Entry
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from .io_buffer import IOBuffer
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from .entry.parse_error_entry import ParseErrorEntry
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from .entry.read_entry import ReadEntry
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from .entry.reasoning_entry import ReasoningEntry
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from .entry.repeat_entry import RepeatEntry
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from .entry.single_entry import SingleEntry
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from .entry.write_entry import WriteEntry
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class ResponseParser:
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"""
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Parses XML responses from the LLM into commands or entries.
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The parser validates the XML structure and converts it into the appropriate
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Command or Entry object based on the root element tag. Invalid input results
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in ParseErrorEntry objects rather than raising exceptions.
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Attributes:
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io_buffer: Buffer to use for IO operations
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"""
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def __init__(self, io_buffer: IOBuffer):
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"""
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Initialize parser with IO buffer.
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Args:
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io_buffer: Buffer to use for IO operations
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"""
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self._io_buffer = io_buffer
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@property
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def io_buffer(self) -> IOBuffer:
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"""
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Get the IO buffer used by the parser.
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Returns:
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IOBuffer: Buffer used for IO operations
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"""
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return self._io_buffer
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def parse(self, timestamp: datetime, xml: str) -> Union[Command, Entry]:
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"""
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Parse XML response into a Command or Entry.
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Args:
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xml: XML string to parse
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Returns:
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Command or Entry based on the XML content
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ParseErrorEntry for any parsing or validation errors
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"""
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entry_id = format_timestamp(timestamp)
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parser = ET.XMLPullParser(events=("start", "end"))
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parser.feed(xml)
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root = None
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try:
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for event, root in parser.read_events():
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if event == "start":
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break
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except ET.ParseError as e:
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return ParseErrorEntry(entry_id, xml, f"Invalid XML: {str(e)}")
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try:
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if root.tag == 'delete':
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target_id = root.get('id')
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if not target_id:
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return ParseErrorEntry(entry_id, xml, "Delete command missing required 'id' attribute")
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if len(root.attrib) > 1:
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return ParseErrorEntry(entry_id, xml, "Delete command should only have 'id' attribute")
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return DeleteCommand(target_id)
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elif root.tag == 'stop':
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return StopCommand()
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elif root.tag == 'background':
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if len(root) != 0 or root.attrib or root.text is None or root.text.strip() == '':
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return ParseErrorEntry(entry_id, xml, "Background entry requires (only) script content")
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return BackgroundEntry(entry_id, root.text)
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elif root.tag == 'repeat':
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if len(root) != 0 or root.text is None or root.text.strip() == '':
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return ParseErrorEntry(entry_id, xml, "Repeat entry requires (only) script content")
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if len(root.attrib) > 2 or any(k not in ('timeout', 'limit') for k in root.attrib):
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return ParseErrorEntry(entry_id, xml, "Repeat entry only accepts 'timeout' and 'limit' attributes")
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timeout = root.get('timeout')
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limit = root.get('limit')
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timeout = float(timeout) if timeout is not None else None
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limit = int(limit) if limit is not None else None
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return RepeatEntry(entry_id, root.text, timeout, limit)
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elif root.tag == 'single':
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if len(root) != 0 or root.text is None or root.text.strip() == '':
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return ParseErrorEntry(entry_id, xml, "Single entry requires (only) script content")
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if len(root.attrib) > 2 or any(k not in ('timeout', 'limit') for k in root.attrib):
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return ParseErrorEntry(entry_id, xml, "Single entry only accepts 'timeout' and 'limit' attributes")
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timeout = root.get('timeout')
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limit = root.get('limit')
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timeout = float(timeout) if timeout is not None else None
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limit = int(limit) if limit is not None else None
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return SingleEntry(entry_id, root.text, timeout, limit)
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elif root.tag == 'reasoning':
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if len(root) != 0 or root.attrib or root.text is None or root.text.strip() == '':
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return ParseErrorEntry(entry_id, xml, "Reasoning entry requires (only) text content")
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return ReasoningEntry(entry_id, root.text)
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elif root.tag == 'read_stdin':
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return ReadEntry(entry_id, self._io_buffer)
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elif root.tag == 'write_stdout':
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if len(root) != 0 or root.attrib or root.text is None or root.text.strip() == '':
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return ParseErrorEntry(entry_id, xml, "Write stdout entry requires (only) text content")
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return WriteEntry(entry_id, root.text, self._io_buffer)
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else:
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return ParseErrorEntry(entry_id, xml, f"Unknown root element: {root.tag}")
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except Exception as e:
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return ParseErrorEntry(entry_id, xml, f"Error parsing response: {str(e)}")
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