text: # -*- coding: utf-8 -*-
  # Copyright 2014, 2015 matrix.org
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  from ._base import Config
  from collections import namedtuple
  
  ThumbnailRequirement = namedtuple(
      "ThumbnailRequirement", ["width", "height", "method", "media_type"]
  )
  
  
  def parse_thumbnail_requirements(thumbnail_sizes):
      """ Takes a list of dictionaries with "width", "height", and "method" keys
      and creates a map from image media types to the thumbnail size, thumnailing
      method, and thumbnail media type to precalculate
  
      Args:
          thumbnail_sizes(list): List of dicts with "width", "height", and
              "method" keys
      Returns:
          Dictionary mapping from media type string to list of
          ThumbnailRequirement tuples.
      """
      requirements = {}
      for size in thumbnail_sizes:
          width = size["width"]
          height = size["height"]
          method = size["method"]
          jpeg_thumbnail = ThumbnailRequirement(width, height, method, "image/jpeg")
          png_thumbnail = ThumbnailRequirement(width, height, method, "image/png")
          requirements.setdefault("image/jpeg", []).append(jpeg_thumbnail)
          requirements.setdefault("image/gif", []).append(png_thumbnail)
          requirements.setdefault("image/png", []).append(png_thumbnail)
      return {
          media_type: tuple(thumbnails)
          for media_type, thumbnails in requirements.items()
      }
  
  
  class ContentRepositoryConfig(Config):
      def read_config(self, config):
          self.max_upload_size = self.parse_size(config["max_upload_size"])
          self.max_image_pixels = self.parse_size(config["max_image_pixels"])
          self.media_store_path = self.ensure_directory(config["media_store_path"])
          self.uploads_path = self.ensure_directory(config["uploads_path"])
          self.dynamic_thumbnails = config["dynamic_thumbnails"]
          self.thumbnail_requirements = parse_thumbnail_requirements(
              config["thumbnail_sizes"]
          )
  
      def default_config(self, **kwargs):
          media_store = self.default_path("media_store")
          uploads_path = self.default_path("uploads")
          return """
          # Directory where uploaded images and attachments are stored.
          media_store_path: "%(media_store)s"
  
          # Directory where in-progress uploads are stored.
          uploads_path: "%(uploads_path)s"
  
          # The largest allowed upload size in bytes
          max_upload_size: "10M"
  
          # Maximum number of pixels that will be thumbnailed
          max_image_pixels: "32M"
  
          # Whether to generate new thumbnails on the fly to precisely match
          # the resolution requested by the client. If true then whenever
          # a new resolution is requested by the client the server will
          # generate a new thumbnail. If false the server will pick a thumbnail
          # from a precalcualted list.
          dynamic_thumbnails: false
  
          # List of thumbnail to precalculate when an image is uploaded.
          thumbnail_sizes:
          - width: 32
            height: 32
            method: crop
          - width: 96
            height: 96
            method: crop
          - width: 320
            height: 240
            method: scale
          - width: 640
            height: 480
            method: scale
          - width: 800
            height: 600
            method: scale
          """ % locals()
  