from __future__ import annotations import re from io import BytesIO import base64 from .typing import ImageType, Union, Image try: from PIL.Image import open as open_image, new as new_image from PIL.Image import FLIP_LEFT_RIGHT, ROTATE_180, ROTATE_270, ROTATE_90 has_requirements = True except ImportError: has_requirements = False from .errors import MissingRequirementsError ALLOWED_EXTENSIONS = {'png', 'jpg', 'jpeg', 'gif', 'webp', 'svg'} def to_image(image: ImageType, is_svg: bool = False) -> Image: """ Converts the input image to a PIL Image object. Args: image (Union[str, bytes, Image]): The input image. Returns: Image: The converted PIL Image object. """ if not has_requirements: raise MissingRequirementsError('Install "pillow" package for images') if isinstance(image, str): is_data_uri_an_image(image) image = extract_data_uri(image) if is_svg: try: import cairosvg except ImportError: raise MissingRequirementsError('Install "cairosvg" package for svg images') if not isinstance(image, bytes): image = image.read() buffer = BytesIO() cairosvg.svg2png(image, write_to=buffer) return open_image(buffer) if isinstance(image, bytes): is_accepted_format(image) return open_image(BytesIO(image)) elif not isinstance(image, Image): image = open_image(image) copy = image.copy() copy.format = image.format return copy return image def is_allowed_extension(filename: str) -> bool: """ Checks if the given filename has an allowed extension. Args: filename (str): The filename to check. Returns: bool: True if the extension is allowed, False otherwise. """ return '.' in filename and \ filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS def is_data_uri_an_image(data_uri: str) -> bool: """ Checks if the given data URI represents an image. Args: data_uri (str): The data URI to check. Raises: ValueError: If the data URI is invalid or the image format is not allowed. """ # Check if the data URI starts with 'data:image' and contains an image format (e.g., jpeg, png, gif) if not re.match(r'data:image/(\w+);base64,', data_uri): raise ValueError("Invalid data URI image.") # Extract the image format from the data URI image_format = re.match(r'data:image/(\w+);base64,', data_uri).group(1).lower() # Check if the image format is one of the allowed formats (jpg, jpeg, png, gif) if image_format not in ALLOWED_EXTENSIONS and image_format != "svg+xml": raise ValueError("Invalid image format (from mime file type).") def is_accepted_format(binary_data: bytes) -> bool: """ Checks if the given binary data represents an image with an accepted format. Args: binary_data (bytes): The binary data to check. Raises: ValueError: If the image format is not allowed. """ if binary_data.startswith(b'\xFF\xD8\xFF'): pass # It's a JPEG image elif binary_data.startswith(b'\x89PNG\r\n\x1a\n'): pass # It's a PNG image elif binary_data.startswith(b'GIF87a') or binary_data.startswith(b'GIF89a'): pass # It's a GIF image elif binary_data.startswith(b'\x89JFIF') or binary_data.startswith(b'JFIF\x00'): pass # It's a JPEG image elif binary_data.startswith(b'\xFF\xD8'): pass # It's a JPEG image elif binary_data.startswith(b'RIFF') and binary_data[8:12] == b'WEBP': pass # It's a WebP image else: raise ValueError("Invalid image format (from magic code).") def extract_data_uri(data_uri: str) -> bytes: """ Extracts the binary data from the given data URI. Args: data_uri (str): The data URI. Returns: bytes: The extracted binary data. """ data = data_uri.split(",")[1] data = base64.b64decode(data) return data def get_orientation(image: Image) -> int: """ Gets the orientation of the given image. Args: image (Image): The image. Returns: int: The orientation value. """ exif_data = image.getexif() if hasattr(image, 'getexif') else image._getexif() if exif_data is not None: orientation = exif_data.get(274) # 274 corresponds to the orientation tag in EXIF if orientation is not None: return orientation def process_image(img: Image, new_width: int, new_height: int) -> Image: """ Processes the given image by adjusting its orientation and resizing it. Args: img (Image): The image to process. new_width (int): The new width of the image. new_height (int): The new height of the image. Returns: Image: The processed image. """ # Fix orientation orientation = get_orientation(img) if orientation: if orientation > 4: img = img.transpose(FLIP_LEFT_RIGHT) if orientation in [3, 4]: img = img.transpose(ROTATE_180) if orientation in [5, 6]: img = img.transpose(ROTATE_270) if orientation in [7, 8]: img = img.transpose(ROTATE_90) # Resize image img.thumbnail((new_width, new_height)) # Remove transparency if img.mode != "RGB": img.load() white = new_image('RGB', img.size, (255, 255, 255)) white.paste(img, mask=img.split()[3]) return white return img def to_base64_jpg(image: Image, compression_rate: float) -> str: """ Converts the given image to a base64-encoded string. Args: image (Image.Image): The image to convert. compression_rate (float): The compression rate (0.0 to 1.0). Returns: str: The base64-encoded image. """ output_buffer = BytesIO() image.save(output_buffer, format="JPEG", quality=int(compression_rate * 100)) return base64.b64encode(output_buffer.getvalue()).decode() def format_images_markdown(images, alt: str, preview: str = None) -> str: """ Formats the given images as a markdown string. Args: images: The images to format. alt (str): The alt for the images. preview (str, optional): The preview URL format. Defaults to "{image}?w=200&h=200". Returns: str: The formatted markdown string. """ if isinstance(images, str): images = f"[![{alt}]({preview.replace('{image}', images) if preview else images})]({images})" else: images = [ f"[![#{idx+1} {alt}]({preview.replace('{image}', image) if preview else image})]({image})" for idx, image in enumerate(images) ] images = "\n".join(images) start_flag = "\n" end_flag = "\n" return f"\n{start_flag}{images}\n{end_flag}\n" def to_bytes(image: ImageType) -> bytes: """ Converts the given image to bytes. Args: image (ImageType): The image to convert. Returns: bytes: The image as bytes. """ if isinstance(image, bytes): return image elif isinstance(image, str): is_data_uri_an_image(image) return extract_data_uri(image) elif isinstance(image, Image): bytes_io = BytesIO() image.save(bytes_io, image.format) image.seek(0) return bytes_io.getvalue() else: return image.read() class ImageResponse: def __init__( self, images: Union[str, list], alt: str, options: dict = {} ): self.images = images self.alt = alt self.options = options def __str__(self) -> str: return format_images_markdown(self.images, self.alt, self.get("preview")) def get(self, key: str): return self.options.get(key) class ImageRequest: def __init__( self, options: dict = {} ): self.options = options def get(self, key: str): return self.options.get(key)