Splits user view out and adds template

bookwyrm/views/edit_user.py

@@ -0,0 +1,82 @@
+""" edit or delete ones own account"""
+from io import BytesIO
+from uuid import uuid4
+from PIL import Image
+
+from django.contrib.auth.decorators import login_required
+from django.core.files.base import ContentFile
+from django.shortcuts import redirect
+from django.template.response import TemplateResponse
+from django.utils.decorators import method_decorator
+from django.views import View
+
+from bookwyrm import forms
+
+
+# pylint: disable=no-self-use
+@method_decorator(login_required, name="dispatch")
+class EditUser(View):
+    """edit user view"""
+
+    def get(self, request):
+        """edit profile page for a user"""
+        data = {
+            "form": forms.EditUserForm(instance=request.user),
+            "user": request.user,
+        }
+        return TemplateResponse(request, "preferences/edit_user.html", data)
+
+    def post(self, request):
+        """les get fancy with images"""
+        form = forms.EditUserForm(request.POST, request.FILES, instance=request.user)
+        if not form.is_valid():
+            data = {"form": form, "user": request.user}
+            return TemplateResponse(request, "preferences/edit_user.html", data)
+
+        user = save_user_form(form)
+
+        return redirect(user.local_path)
+
+
+def save_user_form(form):
+    """special handling for the user form"""
+    user = form.save(commit=False)
+
+    if "avatar" in form.files:
+        # crop and resize avatar upload
+        image = Image.open(form.files["avatar"])
+        image = crop_avatar(image)
+
+        # set the name to a hash
+        extension = form.files["avatar"].name.split(".")[-1]
+        filename = "%s.%s" % (uuid4(), extension)
+        user.avatar.save(filename, image, save=False)
+    user.save()
+    return user
+
+
+def crop_avatar(image):
+    """reduce the size and make an avatar square"""
+    target_size = 120
+    width, height = image.size
+    thumbnail_scale = (
+        height / (width / target_size)
+        if height > width
+        else width / (height / target_size)
+    )
+    image.thumbnail([thumbnail_scale, thumbnail_scale])
+    width, height = image.size
+
+    width_diff = width - target_size
+    height_diff = height - target_size
+    cropped = image.crop(
+        (
+            int(width_diff / 2),
+            int(height_diff / 2),
+            int(width - (width_diff / 2)),
+            int(height - (height_diff / 2)),
+        )
+    )
+    output = BytesIO()
+    cropped.save(output, format=image.format)
+    return ContentFile(output.getvalue())