from functools import partial from django.db import models from core.uploads import upload_namer from core.uris import ProxyAbsoluteUrl, RelativeAbsoluteUrl from stator.models import State, StateField, StateGraph, StatorModel class PostAttachmentStates(StateGraph): new = State(try_interval=30000) fetched = State() new.transitions_to(fetched) @classmethod async def handle_new(cls, instance): # TODO: Fetch images to our own media storage pass class PostAttachment(StatorModel): """ An attachment to a Post. Could be an image, a video, etc. """ post = models.ForeignKey( "activities.post", on_delete=models.CASCADE, related_name="attachments", blank=True, null=True, ) state = StateField(graph=PostAttachmentStates) mimetype = models.CharField(max_length=200) # Files may not be populated if it's remote and not cached on our side yet file = models.FileField( upload_to=partial(upload_namer, "attachments"), null=True, blank=True, ) thumbnail = models.ImageField( upload_to=partial(upload_namer, "attachment_thumbnails"), null=True, blank=True, ) remote_url = models.CharField(max_length=500, null=True, blank=True) # This is the description for images, at least name = models.TextField(null=True, blank=True) width = models.IntegerField(null=True, blank=True) height = models.IntegerField(null=True, blank=True) focal_x = models.IntegerField(null=True, blank=True) focal_y = models.IntegerField(null=True, blank=True) blurhash = models.TextField(null=True, blank=True) created = models.DateTimeField(auto_now_add=True) updated = models.DateTimeField(auto_now=True) def is_image(self): return self.mimetype in [ "image/apng", "image/avif", "image/gif", "image/jpeg", "image/png", "image/webp", ] def is_video(self): return self.mimetype in [ "video/mp4", "video/ogg", "video/webm", ] def thumbnail_url(self) -> RelativeAbsoluteUrl: if self.thumbnail: return RelativeAbsoluteUrl(self.thumbnail.url) elif self.file: return RelativeAbsoluteUrl(self.file.url) else: return ProxyAbsoluteUrl( f"/proxy/post_attachment/{self.pk}/", remote_url=self.remote_url, ) def full_url(self): if self.file: return RelativeAbsoluteUrl(self.file.url) if self.is_image(): return ProxyAbsoluteUrl( f"/proxy/post_attachment/{self.pk}/", remote_url=self.remote_url, ) return RelativeAbsoluteUrl(self.remote_url) @property def file_display_name(self): if self.remote_url: return self.remote_url.rsplit("/", 1)[-1] if self.file: return self.file.name return f"attachment ({self.mimetype})" ### ActivityPub ### def to_ap(self): return { "url": self.file.url, "name": self.name, "type": "Document", "width": self.width, "height": self.height, "mediaType": self.mimetype, "blurhash": self.blurhash, } ### Mastodon Client API ### def to_mastodon_json(self): value = { "id": self.pk, "type": "image" if self.is_image() else "unknown", "url": self.full_url().absolute, "preview_url": self.thumbnail_url().absolute, "remote_url": None, "meta": { "focus": { "x": self.focal_x or 0, "y": self.focal_y or 0, }, }, "description": self.name, "blurhash": self.blurhash, } if self.width and self.height: value["meta"]["original"] = { "width": self.width, "height": self.height, "size": f"{self.width}x{self.height}", "aspect": self.width / self.height, } return value