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path: root/server/continuedev/libs/llm/prompt_utils.py
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from typing import Dict, List, Union

from ...models.filesystem import RangeInFileWithContents
from ...models.filesystem_edit import FileEdit


class MarkdownStyleEncoderDecoder:
    # Filename -> the part of the file you care about
    range_in_files: List[RangeInFileWithContents]

    def __init__(self, range_in_files: List[RangeInFileWithContents]):
        self.range_in_files = range_in_files

    def encode(self) -> str:
        return "\n\n".join(
            [
                f"File ({rif.filepath})\n```\n{rif.contents}\n```"
                for rif in self.range_in_files
            ]
        )

    def _suggestions_to_file_edits(self, suggestions: Dict[str, str]) -> List[FileEdit]:
        file_edits: List[FileEdit] = []
        for suggestion_filepath, suggestion in suggestions.items():
            matching_rifs = list(
                filter(lambda r: r.filepath == suggestion_filepath, self.range_in_files)
            )
            if len(matching_rifs) > 0:
                range_in_file = matching_rifs[0]
                file_edits.append(
                    FileEdit(
                        range=range_in_file.range,
                        filepath=range_in_file.filepath,
                        replacement=suggestion,
                    )
                )

        return file_edits

    def _decode_to_suggestions(self, completion: str) -> Dict[str, str]:
        if len(self.range_in_files) == 0:
            return {}

        if "```" not in completion:
            completion = "```\n" + completion + "\n```"
        if completion.strip().splitlines()[0].strip() == "```":
            first_filepath = self.range_in_files[0].filepath
            completion = f"File ({first_filepath})\n" + completion

        suggestions: Dict[str, str] = {}
        current_file_lines: List[str] = []
        current_filepath: Union[str, None] = None
        last_was_file = False
        inside_file = False
        for line in completion.splitlines():
            if line.strip().startswith("File ("):
                last_was_file = True
                current_filepath = line.strip()[6:-1]
            elif last_was_file and line.startswith("```"):
                last_was_file = False
                inside_file = True
            elif inside_file:
                if line.startswith("```"):
                    inside_file = False
                    suggestions[current_filepath] = "\n".join(current_file_lines)
                    current_file_lines = []
                    current_filepath = None
                else:
                    current_file_lines.append(line)

        return suggestions

    def decode(self, completion: str) -> List[FileEdit]:
        suggestions = self._decode_to_suggestions(completion)
        file_edits = self._suggestions_to_file_edits(suggestions)
        return file_edits