T = TypeVar('T')
def batch(n: int, i: Iterator[T]) -> Iterable[List[T]]:
def AutoJSONEncoder(obj):
def iterator_every(it: Iterable[T], every: int = 100, msg=str):
def get_secret(content, file_flag): class Feature(Base):
  __tablename__ = 'feature'
  post_id = Column(
      Integer,
      ForeignKey('post.id'),
      primary_key=True,
      index=True,
      autoincrement=False)
  post = relationship('Post', back_populates='features')
  type = Column(String(32), nullable=False, primary_key=True, index=True)
  id = Column(Integer, primary_key=True, index=True)
  data = Column(LargeBinary)

  def __str__(self):
    return "Feature(post=%s, type=%s, data=%s)" % (self.post, self.type,
                                                   self.data)

  def __repr__(self):
    return f"Feature(post_id={self.post_id}, type={self.type}, id={self.id})" class FeatureRepository(Repository[FeatureKey, Feature]):

  @inject
  def __init__(self, session_provider: ProviderOf[Session]) -> None:
    super().__init__(FeatureKey, Feature, session_provider) class FeatureRepositoryModule(Module):

  def configure(self, binder):
    binder.install(Rep0stDatabaseModule)
    binder.bind(FeatureRepository) class Post(Base):
  from rep0st.db.feature import Feature
  from rep0st.db.tag import Tag

  __tablename__ = 'post'
  # Post id.
  id = Column(Integer, primary_key=True, index=True, autoincrement=False)
  # Timestamp this post was created.
  created = Column(DateTime(), nullable=False)
  # Path of the image on pr0gramm servers.
  image = Column(String(256), nullable=False, index=True)
  # Path of the thumbnail on pr0gramm servers.
  thumb = Column(String(256), nullable=False)
  # Path of the fullsize image on pr0gramm servers. Optional.
  fullsize = Column(String(256))
  # Width of the media in pixels.
  width = Column(Integer(), nullable=False)
  # Height of the media in pixels.
  height = Column(Integer(), nullable=False)
  # True if the media has audio.
  audio = Column(Boolean(), nullable=False)
  # URL of the source of the image. Optional.
  source = Column(String(512))
  # Flags for the post encoded as a bitset. If the bit is set,
  # the post is marked with the given tag.
  # Bit 0: SFW
  # Bit 1: NSFW
  # Bit 2: NSFL
  # Bit 3: NSFP
  flags = Column(Integer(), nullable=False)
  # Name of the user that uploaded the post.
  user = Column(String(32), nullable=False)
  # Type of the media in the post.
  # - IMAGE: Static images. (jpg, png)
  # - ANIMATED: Animated images. (gif)
  # - VIDEO: Videos. (mp4, webm)
  type = Column(Enum(Type), nullable=False, index=True)
  # Status of the post.
  status = Column(
      Enum(Status), nullable=False, index=True, default=Status.NO_MEDIA)
  # True if the post is deleted on pr0gramm.
  deleted = Column(Boolean(), nullable=False, default=False)
  # List of features associated with this post.
  features = relationship(Feature)
  # List of tags associated with this post.
  tags = relationship(Tag)

  def __json__(self):
    return {
        'id': self.id,
        'user': self.user,
        'created': self.created.isoformat(),
        'is_sfw': self.is_sfw(),
        'is_nsfw': self.is_nsfw(),
        'is_nsfl': self.is_nsfl(),
        'image': self.image,
        'thumb': self.thumb,
        'fullsize': self.fullsize,
    }

  def as_indexed_doc(self):

    def feauture_key_func(feature: Feature):
      return feature.id

    return {
        'meta': {
            'id': self.id
        },
        'created':
            int(self.created.timestamp() * 1000),
        'flags': [flag.value for flag in self.get_flags()],
        'type':
            self.type.value,
        'tags': [tag.tag for tag in self.tags],
        'frames': [{
            'id': key,
            'features': {v.type: v.data for v in valuesiter}
        } for key, valuesiter in groupby(
            sorted(self.features, key=feauture_key_func), key=feauture_key_func)
                  ],
    }

  def is_sfw(self):
    return self.flags & 1 != 0

  def is_nsfw(self):
    return self.flags & 2 != 0

  def is_nsfl(self):
    return self.flags & 4 != 0

  def is_nsfp(self):
    return self.flags & 8 != 0

  def get_flags(self) -> List[Flag]:
    flags = []
    if self.is_sfw():
      flags.append(Flag.SFW)
    if self.is_nsfw():
      flags.append(Flag.NSFW)
    if self.is_nsfl():
      flags.append(Flag.NSFL)
    if self.is_nsfp():
      flags.append(Flag.NSFP)
    return flags

  def get_flag_by_importance(self) -> Flag:
    if self.is_nsfl():
      return Flag.NSFL
    if self.is_nsfw():
      return Flag.NSFW
    if self.is_nsfp():
      return Flag.NSFP
    return Flag.SFW

  def __str__(self):
    return "Post(id=" + str(self.id) + ")"

  def __repr__(self):
    return "Post(id=" + str(self.id) + ")" class PostRepository(Repository[int, Post]):

  @inject
  def __init__(self, session_provider: ProviderOf[Session]) -> None:
    super().__init__(int, Post, session_provider)

  @transactional()
  def get_latest_post_id(self) -> int:
    session = self._get_session()
    id = session.query(func.max(Post.id)).scalar()
    return 0 if id is None else id

  @transactional()
  def get_posts(self, type: Optional[str] = None):
    session = self._get_session()
    if type is not None:
      return session.query(Post).filter(Post.type == type)
    else:
      return session.query(Post)

  @transactional()
  def get_posts_missing_features(self, type: Optional[Type] = None):
    session = self._get_session()
    q = session.query(Post)
    if type:
      q = q.filter(Post.type == type)
    return q.filter(
        and_(Post.status == Status.NOT_INDEXED, Post.deleted == False))

  @transactional()
  def post_count(self) -> int:
    session = self._get_session()
    return session.query(func.count(Post.id)).scalar() class PostRepositoryModule(Module):

  def configure(self, binder):
    binder.install(Rep0stDatabaseModule)
    binder.bind(PostRepository) class Status(enum.Enum):
  # No attempt to download the media has been made yet.
  NO_MEDIA = 'NO_MEDIA'
  # The image is downloaded, but not yet indexed.
  NOT_INDEXED = 'NOT_INDEXED'
  # The image has been indexed.
  INDEXED = 'INDEXED'
  # No media was found on pr0gramm servers.
  NO_MEDIA_FOUND = 'NO_MEDIA_FOUND'
  # The downloaded media cannot be read.
  MEDIA_BROKEN = 'MEDIA_BROKEN' class Type(enum.Enum):
  IMAGE = 'IMAGE'
  ANIMATED = 'ANIMATED'
  VIDEO = 'VIDEO'
  UNKNOWN = 'UNKNOWN' def transactional() -> Any:

  def decorator(fun: Callable):
    transactional_configuration = _TransactionalConfiguration()

    @functools.wraps(fun)
    def wrapper(*args: Any, **kwargs: Any) -> Any:
      if not hasattr(transactional_state, 'depth'):
        transactional_state.depth = 0
      session = transactional_configuration.database_session_provider.get()
      if not transactional_state.depth:
        log.debug(
            f'Starting transaction on method {transactional_configuration.name}'
        )
        # Session start. Implicit with transactional_configuration.injector.get(DatabaseSession)
        pass
      transactional_state.depth += 1
      try:
        ret = fun(*args, **kwargs)
        transactional_state.depth -= 1
        if transactional_state.depth == 0:
          log.debug(
              f'Committing transaction on method {transactional_configuration.name}'
          )
          # We reached the outer most @transactional(). Commit the transaction.
          session.commit()
      except:
        transactional_state.depth -= 1
        if transactional_state.depth == 0:
          log.info(
              f'Rolling back transaction on method {transactional_configuration.name}'
          )
          # We reached the outer most @transactional(). Rollback the transaction.
          session.rollback()
        raise
      finally:
        if transactional_state.depth == 0:
          log.debug(
              f'Removing session on method {transactional_configuration.name}')
          # Close the session, to remove invalid state in case of errors.
          session.close()
          # We reached the outer most @transactional(). Close the session.
          session_factory = transactional_configuration.database_session_factory_provider.get(
          )
          session_factory.remove()
          delattr(transactional_state, 'depth')
      return ret

    wrapper.__transactional__ = transactional_configuration
    return wrapper

  return decorator class PostIndex(Index[Post]):

  @inject
  def __init__(self, elasticsearch: Elasticsearch):
    super().__init__(Post, elasticsearch=elasticsearch)

  def _index_post_from_post(self, post: DBPost) -> Post:
    index_post = Post()
    index_post.meta.id = post.id
    index_post.created = post.created
    index_post.type = post.type.value
    index_post.flags = [flag.value for flag in post.get_flags()]
    index_post.tags = [tag.tag for tag in post.tags]
    index_post.frames = [
        Frame(
            id=feature.id,
            feature_vector=[float(n / 255.0)
                            for n in feature.data])
        for feature in post.features
        if feature.type == FEATURE_VECTOR_TYPE
    ]
    return index_post

  def add_posts(self, posts: Iterable[Post]):

    def _it():
      for post in posts:
        yield self._index_post_from_post(post)

    self.save_all(_it())

  def find_posts(self, feature_vector):
    response = self.search().update_from_dict({
        'size': 50,
        'fields': [],
        '_source': False,
        'min_score': 0.3,
        'query': {
            'nested': {
                'path': 'frames',
                'query': {
                    'elastiknn_nearest_neighbors': {
                        'field': 'frames.feature_vector',
                        'vec': feature_vector,
                        'model': 'lsh',
                        'similarity': 'l2',
                        'candidates': 500
                    },
                },
            },
        },
    }).execute()

    for post in response:
      yield SearchResult(post.meta.score, post.meta.id) class PostIndexModule(Module):

  def configure(self, binder):
    binder.install(Rep0stElasticsearchModule)
    binder.bind(PostIndex) class AnalyzeService:
  _analyzers: List[Analyzer] = None

  @inject
  def __init__(self, analyzers: Analyzers) -> None:
    self._analyzers = set(analyzers)
    for analyzer in self._analyzers:
      log.info(f'Registered analyzer {analyzer.get_type()}')

  def analyze(self, image: numpy.ndarray):
    input_image = InputImage(image, cv2.cvtColor(image, cv2.COLOR_BGR2GRAY))

    result = {}
    for analyzer in self._analyzers:
      start = time.time()
      result[analyzer.get_type()] = analyzer.analyze(input_image)
      end = time.time()
      time_taken = end - start
      log.debug(
          f'Analyzed image {image.shape} with analyzer {analyzer.get_type()} in {time_taken * 1000:.2f}ms'
      )
    return result class AnalyzeServiceModule(Module):

  def configure(self, binder):
    binder.install(FeatureVectorAnalyzerModule)
    # TODO(rhollander): Enable other analyzers.
    # binder.install(AverageHashAnalyzerModule)
    # binder.install(DifferenceHashAnalyzerModule)
    # binder.install(PerceptualHashAnalyzerModule)
    # binder.install(WaveletHashAnalyzerModule)
    binder.bind(AnalyzeService) class ImageDecodeException(Exception):
  pass class NoMediaFoundException(Exception):
  pass class ReadMediaService:
  media_dir: Path
  decode_media_service: DecodeMediaService
  decoders: Dict[Type, Callable[[Iterable[numpy.ndarray]], BinaryIO]]

  @inject
  def __init__(self, media_dir: _MediaDirectory,
               decode_media_service: DecodeMediaService):
    self.media_dir = media_dir
    self.decode_media_service = decode_media_service
    self.decoders = {
        Type.IMAGE: self.decode_media_service.decode_image_from_file,
        Type.VIDEO: self.decode_media_service.decode_video_from_file,
    }

  def get_images(self, post: Post) -> Iterable[numpy.ndarray]:
    media_file = self.media_dir / post.image

    if post.fullsize:
      fullsize_media_file = self.media_dir / 'full' / post.fullsize
      if not fullsize_media_file.is_file():
        log.error(
            f'Fullsize image for {post.id} not found at {fullsize_media_file.absolute()}. Falling back to resized image'
        )
      else:
        log.debug(f'Using fullsize image {fullsize_media_file.absolute()}')
        media_file = fullsize_media_file

    if post.type not in self.decoders:
      raise NotImplementedError(
          f'Decoder needed for {post} for type {post.type} is not implemented')

    try:
      with media_file.open("rb") as f:
        for image in self.decoders[post.type](f):
          yield image
    except (IOError, OSError) as e:
      raise NoMediaFoundException(
          f'Could not read images for post {post.id} from file {media_file.absolute()}'
      ) from e class ReadMediaServiceModule(Module):

  def configure(self, binder: Binder):
    binder.install(DecodeMediaServiceModule)
    binder.install(_MediaFlagModule)
    binder.bind(ReadMediaService)
import logging
import numpy
from typing import Dict, List, Optional, Tuple
from injector import Binder, Module, inject, singleton
from joblib import Parallel, delayed, parallel_backend
from prometheus_client import Counter
from prometheus_client.metrics import Gauge
from sqlalchemy import and_
from rep0st import util
from rep0st.db.feature import Feature, FeatureRepository, FeatureRepositoryModule
from rep0st.db.post import Post, PostRepository, PostRepositoryModule, Status, Type as PostType
from rep0st.framework.data.transaction import transactional
from rep0st.index.post import PostIndex, PostIndexModule
from rep0st.service.analyze_service import AnalyzeService, AnalyzeServiceModule
from rep0st.service.media_service import ImageDecodeException, NoMediaFoundException, ReadMediaService, ReadMediaServiceModule



log = logging.getLogger(__name__)

feature_service_features_added_z = Counter(
    'rep0st_feature_service_features_added',
    'Number of features added to the index')
feature_service_latest_processed_post_z = Gauge(
    'rep0st_feature_service_latest_processed_post',
    'ID of the latest post where the feaures where processed')


class FeatureServiceModule(Module):

  def configure(self, binder: Binder):
    binder.install(PostRepositoryModule)
    binder.install(FeatureRepositoryModule)
    binder.install(AnalyzeServiceModule)
    binder.install(ReadMediaServiceModule)
    binder.install(PostIndexModule)
    binder.bind(FeatureService)


class WorkImage:
  id: int
  features: Dict[str, numpy.ndarray]

  def __init__(self, id: int, features: Dict[str, numpy.ndarray]):
    self.id = id
    self.features = features


class WorkPost:
  post: Post = None  # Do not touch from other threads, only passed around for use in main thread again.
  id: int = None
  type: PostType = None
  status: Status = None
  image: str = None
  fullsize: str = None
  images: List[WorkImage] = []

  def __init__(self, post: Post):
    self.post = post
    self.id = post.id
    self.type = post.type
    self.status = post.status
    self.image = post.image
    self.fullsize = post.fullsize
    self.images = []


@singleton
class FeatureService:
  read_media_service: ReadMediaService = None
  post_repository: PostRepository = None
  feature_repository: FeatureRepository = None
  analyze_service: AnalyzeService = None
  post_index: PostIndex = None

  @inject
  def __init__(self, read_media_service: ReadMediaService,
               post_repository: PostRepository,
               feature_repository: FeatureRepository,
               analyze_service: AnalyzeService, post_index: PostIndex):
    self.read_media_service = read_media_service
    self.post_repository = post_repository
    self.feature_repository = feature_repository
    self.analyze_service = analyze_service
    self.post_index = post_index

  def _process_work_post(self, work_post: WorkPost) -> WorkPost:
    try:
      for i, image in enumerate(self.read_media_service.get_images(work_post)):
        work_post.images.append(
            WorkImage(i, self.analyze_service.analyze(image)))
      work_post.status = Status.INDEXED

    except NoMediaFoundException: