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import re
import sys

from webkitpy.tool.steps.abstractstep import AbstractStep
from webkitpy.tool.steps.options import Options

if sys.version_info > (3, 0):
    from urllib.parse import urlparse
else:
    from urlparse import urlparse


class PromptForBugOrTitle(AbstractStep):
    @classmethod
    def options(cls):
        return AbstractStep.options() + [
            Options.non_interactive,
        ]

    def run(self, state):
        # No need to prompt if we alrady have the bug_id.
        if state.get("bug_id"):
            return
        user_response = self._tool.user.prompt("Please enter a bug number/bugzilla URL or a title for a new bug:\n")
        # If the user responds with a number or a valid bugzilla URL, we assume it's bug number.
        # Otherwise we assume it's a bug subject.
        try:
            state["bug_id"] = int(user_response)
        except ValueError:
            parsed_url = None
            try:
                parsed_url = urlparse(user_response)
            except ValueError:
                # urlparse can throw a value error for some strings.
                pass

            if parsed_url and re.match("bugs.webkit.org", parsed_url.netloc):
                    match = re.match(r"id=(?P<bug_id>\d+)", parsed_url.query)
                    if match:
                        state["bug_id"] = int(match.group("bug_id"))
                        return

            if not self._options.non_interactive and not self._tool.user.confirm("Are you sure you want to create a new bug?", default="n"):
                self._exit(1)
            state["bug_title"] = user_response
            # FIXME: This is kind of a lame description.
            state["bug_description"] = user_response