# Copyright (C) 2010 Google Inc. All rights reserved.

# 

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions are

# met:

# 

#     * Redistributions of source code must retain the above copyright

# notice, this list of conditions and the following disclaimer.

#     * Redistributions in binary form must reproduce the above

# copyright notice, this list of conditions and the following disclaimer

# in the documentation and/or other materials provided with the

# distribution.

#     * Neither the name of Google Inc. nor the names of its

# contributors may be used to endorse or promote products derived from

# this software without specific prior written permission.

# 

# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

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import urllib

from webkitpy.tool.steps.abstractstep import AbstractStep

from webkitpy.tool.steps.options import Options

from webkitpy.common.prettypatch import PrettyPatch

from webkitpy.common.system import logutils

from webkitpy.common.system.executive import ScriptError

_log = logutils.get_logger(__file__)

class ConfirmDiff(AbstractStep):

    @classmethod

    def options(cls):

        return AbstractStep.options() + [

            Options.confirm,

        ]

    def _show_pretty_diff(self, diff):

        if not self._tool.user.can_open_url():

            return None

        try:

            pretty_patch = PrettyPatch(self._tool.executive,

                                       self._tool.scm().checkout_root)

            pretty_diff_file = pretty_patch.pretty_diff_file(diff)

            url = "file://%s" % urllib.quote(pretty_diff_file.name)

            self._tool.user.open_url(url)

            # We return the pretty_diff_file here because we need to keep the

            # file alive until the user has had a chance to confirm the diff.

            return pretty_diff_file

        except ScriptError, e:

            _log.warning("PrettyPatch failed.  :(")

        except OSError, e:

            _log.warning("PrettyPatch unavailable.")

    def run(self, state):

        if not self._options.confirm:

            return

        diff = self.cached_lookup(state, "diff")

        pretty_diff_file = self._show_pretty_diff(diff)

        if not pretty_diff_file:

            self._tool.user.page(diff)

        diff_correct = self._tool.user.confirm("Was that diff correct?")

        if pretty_diff_file:

            pretty_diff_file.close()

        if not diff_correct:

            exit(1)