# 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,

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from datetime import datetime

import logging

from google.appengine.ext import blobstore

from google.appengine.ext import db

class TestFile(db.Model):

    builder = db.StringProperty()

    name = db.StringProperty()

    test_type = db.StringProperty()

    blob_key = db.StringProperty()

    date = db.DateTimeProperty(auto_now_add=True)

    @classmethod

    def delete_file(cls, key, builder, test_type, name, limit):

        if key:

            file = db.get(key)

            if not file:

                logging.warning("File not found, key: %s.", key)

                return False

            file._delete_all()

        else:

            files = cls.get_files(builder, test_type, name, limit)

            if not files:

                logging.warning(

                    "File not found, builder: %s, test_type:%s, name: %s.",

                    builder, test_type, name)

                return False

            for file in files:

                file._delete_all()

        return True

    @classmethod

    def get_files(cls, builder, test_type, name, limit):

        query = TestFile.all()

        if builder:

            query = query.filter("builder =", builder)

        if test_type:

            query = query.filter("test_type =", test_type)

        if name:

            query = query.filter("name =", name)

        return query.order("-date").fetch(limit)

    @classmethod

    def add_file(cls, builder, test_type, blob_info):

        file = TestFile()

        file.builder = builder

        file.test_type = test_type

        file.name = blob_info.filename

        file.blob_key = str(blob_info.key())

        file.put()

        logging.info(

            "File saved, builder: %s, test_type: %s, name: %s, blob key: %s.",

            builder, test_type, file.name, file.blob_key)

        return file

    @classmethod

    def update_file(cls, builder, test_type, blob_info):

        files = cls.get_files(builder, test_type, blob_info.filename, 1)

        if not files:

            return cls.add_file(builder, test_type, blob_info)

        file = files[0]

        old_blob_info = blobstore.BlobInfo.get(file.blob_key)

        if old_blob_info:

            old_blob_info.delete()

        file.builder = builder

        file.test_type = test_type

        file.name = blob_info.filename

        file.blob_key = str(blob_info.key())

        file.date = datetime.now()

        file.put()

        logging.info(

            "File replaced, builder: %s, test_type: %s, name: %s, blob key: %s.",

            builder, test_type, file.name, file.blob_key)

        return file

    def _delete_all(self):

        if self.blob_key:

            blob_info = blobstore.BlobInfo.get(self.blob_key)

            if blob_info:

                blob_info.delete()

        self.delete()