sync moved to modules

modules/sync/sync/models/DocumentPreviewImage.py

@@ -0,0 +1,64 @@
+import os
+from tempfile import mkstemp
+
+from sync.models.Image import Image, default_url_factory
+from utils.image import image_magick_pdf_to_img
+
+
+class DocumentPreviewImage(Image):
+    @staticmethod
+    async def find_one(query):
+        return await Image.find_one(query)
+
+    @staticmethod
+    async def find(query):
+        return await Image.find(query)
+
+    @staticmethod
+    async def delete(query):
+        return await Image.delete(query)
+
+    @staticmethod
+    async def new(provider, file, sizes, **kwargs):
+        img = DocumentPreviewImage(provider, file, data=None)
+        changed = await img.is_changed()
+        if changed:
+            await img.build(sizes=sizes)
+            await img.upload()
+            await img.save()
+        else:
+            doc = await DocumentPreviewImage.find_one({'file': file})
+            img = DocumentPreviewImage(provider, file, doc['data'])
+            img.ref = doc['_id']
+
+        return img
+
+    def __init__(self, provider, file, data):
+        super().__init__(provider, file, data, url_factory=default_url_factory)
+        self.__hash_salt = ''
+        self.temp_image_path = None
+
+    async def is_changed(self):
+        i = await DocumentPreviewImage.find_one({'file': self.file})
+        return self._is_changed_hash(i)
+
+    async def build(self, sizes):
+        self.temp_image_path = await pdf_to_jpg(self.provider, self.file)
+        await super().build(sizes)
+
+    def _get_image_file(self):
+        return self.temp_image_path
+
+    def __get_hash(self):
+        return self.provider.hash(self.file)
+
+
+async def pdf_to_jpg(provider, pdf):
+    _, temp_in = mkstemp(suffix='.pdf')
+    _, temp_out = mkstemp(suffix='.jpg')
+
+    abspdf = provider.copy(pdf, temp_in)
+    await image_magick_pdf_to_img(abspdf, temp_out)
+
+    os.remove(temp_in)
+    return temp_out